VJW602CP'7_Allegro_COVER ABR521

User Manual: ABR521

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EXPLODED VIEWS
1. Cabinet and Main Frame Section
2. Deck Mechanism Section (RL-05)
3. Packing Accessory Section
1. Front Loading Mechanism Section
2. Moving Mechanism Section (1)
3. Moving Mechanism Section (2)

MODEL : ABR521

SERVICE MANUAL

P/NO : 3829RGN004P APRIL, 2005

MODEL : ABR521

VCR+DVD RECORDER

1-1

SECTION 1

SUMMARY

CONTENTS

PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS ............. 1-2

SERVICING PRECAUTIONS .................................................................................................. 1-3

THE STEPS FOR CHANGE THE OPTION CODE ........................................................... 1-4

UP-DATING PROGRAM ........................................................................................................... 1-5

SPECIFICATIONS ...................................................................................................................... 1-7

1-2

IMPORTANT SAFETY NOTICE

This manual was prepared for use only by properly trained audio-video service

technicians.

When servicing this product, under no circumstances should the original

design be modified or altered without permission from ALLEGRO Electronics

Corporation. All components should be replaced only with types identical to

those in the original circuit and their physical location, wiring and lead dress

must conform to original layout upon completion of repairs.

Special components are also used to prevent x-radiation, shock and fire haz-

ard. These components are indicated by the letter “x” included in their compo-

nent designators and are required to maintain safe performance. No deviations

are allowed without prior approval by ALLEGRO Electronics Corporation.

Circuit diagrams may occasionally differ from the actual circuit used. This way,

implementation of the latest safety and performance improvement changes

into the set is not delayed until the new service literature is printed.

CAUTION: Do not attempt to modify this product in any way. Never perform

customized installations without manufacturer’s approval. Unauthorized modi-

fications will not only void the warranty, but may lead to property damage or

user injury.

Service work should be performed only after you are thoroughly familiar with

these safety checks and servicing guidelines.

GRAPHIC SYMBOLS

The exclamation point within an equilateral triangle is intended to

alert the service personnel to important safety information in the

service literature.

The lightning flash with arrowhead symbol within an equilateral tri-

angle is intended to alert the service personnel to the presence of

noninsulated “dangerous voltage” that may be of sufficient magni-

tude to constitute a risk of electric shock.

The pictorial representation of a fuse and its rating within an equi-

lateral triangle is intended to convey to the service personnel the

following fuse replacement caution notice:

CAUTION: FOR CONTINUED PROTECTION AGAINST RISK

OF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND

RATING AS MARKED NEAR EACH FUSE.

SERVICE INFORMATION

While servicing, use an isolation transformer for protection from AC line shock.

After the original service problem has been corrected, make a check of the fol-

lowing:

FIRE AND SHOCK HAZARD

1. Be sure that all components are positioned to avoid a possibility of adjacent

component shorts. This is especially important on items trans-ported to and

from the repair shop.

2. Verify that all protective devices such as insulators, barriers, covers, shields,

strain reliefs, power supply cords, and other hardware have been reinstalled

per the original design. Be sure that the safety purpose of the polarized line

plug has not been defeated.

3. Soldering must be inspected to discover possible cold solder joints, solder

splashes, or sharp solder points. Be certain to remove all loose foreign par-

ticles.

4. Check for physical evidence of damage or deterioration to parts and compo-

nents, for frayed leads or damaged insulation (including the AC cord), and

replace if necessary.

5. No lead or component should touch a high current device or a resistor rated

at 1 watt or more. Lead tension around protruding metal surfaces must be

avoided.

6. After reassembly of the set, always perform an AC leakage test on all

exposed metallic parts of the cabinet (the channel selector knobs, antenna

terminals, handle and screws) to be sure that set is safe to operate without

danger of electrical shock. DO NOT USE A LINE ISOLATION TRANS-

FORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms per

volt or more sensitivity in the following manner: Connect a 1500 ohm, 10

watt resistor, paralleled by a .15 mfd 150V AC type capacitor between a

known good earth ground water pipe, conduit, etc.) and the exposed metal-

lic parts, one at a time. Measure the AC voltage across the combination of

1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by using a

non-polarized adaptor and repeat AC voltage measurements for each

exposed metallic part. Voltage measured must not exceed 0.75 volts RMS.

This corresponds to 0.5 milliamp AC. Any value exceeding this limit consti-

tutes a potential shock hazard and must be corrected immediately.

TIPS ON PROPER INSTALLATION

1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting

shelf space over, or close to, a heat duct, or in the path of heated air flow.

2. Avoid conditions of high humidity such as: outdoor patio installations where

dew is a factor, near steam radiators where steam leakage is a factor, etc.

3. Avoid placement where draperies may obstruct venting. The customer

should also avoid the use of decorative scarves or other coverings that

might obstruct ventilation.

4. Wall- and shelf-mounted installations using a commercial mounting kit must

follow the factory-approved mounting instructions. A product mounted to a

shelf or platform must retain its original feet (or the equivalent thickness in

spacers) to provide adequate air flow across the bottom. Bolts or screws

used for fasteners must not touch any parts or wiring. Perform leakage tests

on customized installations.

5. Caution customers against mounting a product on a sloping shelf or in a tilt-

ed position, unless the receiver is properly secured.

6. A product on a roll-about cart should be stable in its mounting to the cart.

Caution the customer on the hazards of trying to roll a cart with small cast-

ers across thresholds or deep pile carpets.

7. Caution customers against using extension cords. Explain that a forest of

extensions, sprouting from a single outlet, can lead to disastrous conse-

quences to home and family.

A.C. Voltmeter

1500 OHM

10 WATT

Place this probe

on each exposed

metal part.

Good Earth Ground

such as the Water

Pipe, Conduit, etc.

0.15uF

PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS

1-3

SERVICING PRECAUTIONS

CAUTION: Before servicing the VCR + DVD RECODER cov-

ered by this service data and its supplements and addends,

read and follow the SAFETY PRECAUTIONS. NOTE: if

unforeseen circumstances create conflict between the fol-

lowing servicing precautions and any of the safety precau-

tions in this publications, always follow the safety precau-

tions.

Remember Safety First:

General Servicing Precautions

1. Always unplug the VCR + DVD RECODER AC power cord

from the AC power source before:

(1) Removing or reinstalling any component, circuit board,

module, or any other assembly.

(2) Disconnecting or reconnecting any internal electrical

plug or other electrical connection.

(3) Connecting a test substitute in parallel with an elec-

trolytic capacitor.

Caution: A wrong part substitution or incorrect

polarity installation of electrolytic capacitors may result

in an explosion hazard.

2. Do not spray chemicals on or near this VCR + DVD

RECODER or any of its assemblies.

3. Unless specified otherwise in this service data, clean

electrical contacts by applying an appropriate contact

cleaning solution to the contacts with a pipe cleaner,

cotton-tipped swab, or comparable soft applicator.

Unless specified otherwise in this service data, lubrication

of contacts is not required.

4. Do not defeat any plug/socket B+ voltage interlocks with

whitch instruments covered by this service manual might

be equipped.

5. Do not apply AC power to this VCR + DVD RECODER

and / or any of its electrical assemblies unless all solid-

state device heat sinks are correctly installed.

6. Always connect the test instrument ground lead to an

appropriate ground before connecting the test instrument

positive lead. Always remove the test instrument ground

lead last.

Insulation Checking Procedure

Disconnect the attachment plug from the AC outlet and turn

the power on. Connect an insulation resistance meter (500V)

to the blades of the attachment plug. The insulation resis-

tance between each blade of the attachment plug and acces-

sible conductive parts (Note 1) should be more than 1M-

ohm.

Note 1: Accessible Conductive Parts include Metal panels,

Input terminals, Earphone jacks,etc.

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged

easily by static electricity. Such components commonly are

called Electrostatically Sensitive (ES) Devices. Examples of

typical ES devices are integrated circuits and some field

effect transistors and semiconductor chip components.

The following techniques should be used to help reduce the

incidence of component damage caused by static electricity.

1. Immediately before handling any semiconductor compo-

nent or semiconductor-equipped assembly, drain off any

electrostatic charge on your body by touching a known

earth ground. Alternatively, obtain and wear a commer-

cially available discharging wrist strap device, which

should be removed for potential shock reasons prior to

applying power to the unit under test.

2. After removing an electrical assembly equipped with ES

devices, place the assembly on a conductive surface such

as aluminum foil, to prevent electrostatic charge buildup or

exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder

ES devices.

4. Use only an anti-static solder removal device. Some

solder removal devices not classified as “anti-static” can

generate electrical charges sufficient to damage ES

devices.

5. Do not use freon-propelled chemicals. These can

generate an electrical charge sufficient to damage ES

devices.

6. Do not remove a replacement ES device from its protec-

tive package until immediately before you are ready to

install it. (Most replacement ES devices are packaged with

leads electrically shorted together by conductive foam,

aluminum foil,or comparable conductive material).

7. Immediately before removing the protective material from

the leads of a replacement ES device, touch the protective

material to the chassis or circuit assembly into which the

device will be installed.

Caution: Be sure no power is applied to the chassis or

circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged

replacement ES devices. (Normally harmless motion such

as the brushing together of your clothes fabric or the lifting

of your foot from a carpeted floor can generate static elec-

tricity sufficient to damage an ES device.)

1-4

THE STEPS FOR CHANGE THE OPTION CODE

Push Switch POWER ON/ OFF

at remocon or timer keyborad

Select DVD MODE at the set

use remocon or timer keyborad

Push REC+ PLAY

at timer keyboard

Use remocon and push ENTER

Use Direction Key at

remocon (LEFT/ RIGHT)

for select the position of option

Use Direction Key

at remocon (UP/ DOWN)

for change the option

After finish edit code of option

push ENTER at remocon

For finishing and intialized

the option code push

REC + EJECT at remocon

Note : This procedure must be done when IC304(On digital Board) or Digital Boardassy

ABR521

NAME HEX

OPT1 F2

OPT2 55

OPT3 53

OPT4 55

OPT5 17

OPT6 B8

OPT7 20

OPT8 00

Press “Enter” key

to Save and Exit

DETECT NEW EEPROM (OPTION EDIT SCREEN)

BURNING DISC

• For up-dating the DVD program using the disc, it must burning the disc which include the DVD software.

• For recorder combi set which using the disc downloader program are DVD Program and Loader Program.

• In 2nd generation for recorder combi can download the DVD program and Loader program one by one, or all

together.

• If you format like number 1 you’ll see capture like (figure 1)

• And you have three choice:

1. Main. It’s mean if you chose this it’ll up-dating only DVD prgram.

2. Loader.It’s mean if you chose this it’ll up-dating only Loader program.

3. ALL. It’s mean if you chose this it’ll up-dating DVD and Loader program.

• If you format like number 2 you’ll not see capture like figure 1 that give you choices, you have no choice only

update DVD program

1-5

UP-DATING PROGRAM

* There is two way to format disc DVD Program

1. DVD and LOADER program format in one

disc

2. Only DVD program format in one disc

(Figure 1)

Number 1

Number 2

1-6

DVD UPGRADE INSTRUCTION

FORMAT NO 1

1. Press POWER KEY to turn on.

2. After booting, insert the upgrade disc, and you will see massage like [FIGURE 1]

3. Press “REC” key (front or remote) 3 times and you will see as [FIGURE 2] with remote Chose one of them

then Press enter

4. For update both of them [MAIN & LOADER] we chose “ALL” and first you will see [FIGURE 3] DVD update

→Check the “Current Version” and “ New CD Write Version” and press “REC” key.

5. The DVD update will be on progress.And when finish update MAIN Version it’s automatically continue to

Update Loader Version and You will see [FIGURE 4]

→Check the “Current Version” and “New CD Write Version “ and Press “REC” key once more

6. The LOADER update will be on progress. And tray will open.

7. Remove the disc and wait until finish

8. The tray will be close and open automatically after completing “UNDER UPDATE” 100%

9. Turn off the unit

10. Turn on again the unit is operation with new software

FORMAT NO 2

1. Press POWER KEY to turn on.

2. After booting, insert the upgrade disc, and you will see massage like [FIGURE 1]

3. Press “REC” key (front or remote) 3 times

4. The DVD update will be on progress.

→Check the “Current Version” and “New CD Write Version “ and Press “REC” key once more

5. The tray will be open automatically after completing “UNDER UPDATE” 100%

6. Remove the disc andTurn off the unit

7. Turn on again the unit is operation with new software

[FIGURE 1] [FIGURE 2] [FIGURE 3] [FIGURE 4]

[FIGURE 1] [FIGURE 2]

1-7

SPECIFICATIONS

General

Power requirements AC 120V, 60 Hz

Power consumption 35W

Dimensions (approx.) 430 X 78.5 X 354 mm (w x h x d)

Mass (approx.) 5.7 kg

Operating temperature 5°C to 35°C

Operating humidity 5 % to 90 %

Television system NTSC color system

Recording format NTSC

System

Laser Semiconductor laser, wavelength 650 mm

Video head system Double azimuth 4 heads, helical scanning

Signal system NTSC

Recording

Recording format DVD+RW/+R Video format

Recordable discs DVD-ReWritable, DVD-Recordable, DVD+ReWritable, DVD+Recordable

Recordable time Approx. 1 hour (XP mode), 2 hours (SP mode), 4 hours (LP mode),

6 hours (EP mode)

Video recording format

Sampling frequency 27MHz

Compression format MPEG 2

Audio recording format

Sampling frequency 48kHz

Compression format Dolby Digital

Playback

Frequency response DVD (PCM 48 kHz): 8 Hz to 22 kHz, CD: 8 Hz to 20 kHz

DVD (PCM 96 kHz): 8 Hz to 44 kHz

Harmonic distortion Less than 0.008% (AUDIO OUT connector)

Dynamic range More than 95 dB (AUDIO OUT connector)

Inputs

RF IN RF input, 75 ohms

VIDEO IN 1.0 Vp-p 75 ohms, sync negative, RCA jack

AUDIO IN 0 dBm more than 47 kohms, RCA jack (L, R)

DV IN 4 pin (i.LINK/IEEE 1394 standard)

S-VIDEO IN (Y) 1.0 V (p-p), 75 Ω, negative sync, Mini DIN 4-pin x 1

Outputs

S-VIDEO OUT (Y) 1.0 V (p-p), 75 Ω, negative sync, Mini DIN 4-pin x 1

COMPONENT VIDEO OUT (Y) 1.0 V (p-p), 75 Ω, negative sync, RCA jack x 1

(Pb)/(Pr) 0.7 V (p-p), 75 Ω, RCA jack x 2

Audio output (digital audio) 0.5 V (p-p), 75 Ω, RCA jack x 1

Audio output (analog audio) 2.0 Vrms (1 KHz, 0 dB), 600 Ω, RCA jack (L, R) x 1

* Design and specifications are subject to change without notice.

* Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic” and the double-D symbol are trademarks of

Dolby Laboratories.

* DTS and DTS Digital Out are registered trademarks of Digital Theater Systems, Inc.

2-1

SECTION 2

EXPLODED VIEWS

CONTENTS

EXPLODED VIEWS .....................................................................................................................2-2

1. Cabinet and Main Frame Section ...........................................................................................2-2

2. Deck Mechanism Section (RL-05) ..........................................................................................2-3

3. Packing Accessory Section ....................................................................................................2-4

2-2

EXPLODED VIEWS

1. Cabinet and Main Frame Section

283

280

284

469

286

457

A43

285

A48

274

261

452

261

266

263

264

468

265

465

320

260

A44

300

A00

457

470

257

256

255

469

463

250

463

469

A52

A60

457

278

457

A50

A47

A54

276

469

323

321

469

A46

2-3

2. Deck Mechanism Section (RL-05)

1001

A001

A60

1434 1434 1025

1025

1030

1432

1038 1029

1432

1021 1432

1432

1032

1033

1011

1019

1020

1019

1009

1012

1013

1435

1014

1016

1015

1017

1018 1018A

1018B

1018C

1018E 1018D

1006

1436

10241433

1029

1027

1005

1026

1003 1002

A004

A002

1041

1042

1434

A000

1437

2-4

3. Packing Accessory Section

BATTERY

808

BAG

804

PACKING

803

806

INSTRUCTION ASSEMBLY

CABLE(COAXIAL)

810 CABLE ASS'Y RF

801

REMOCON

900

FILTER

826

BOX CARTON

802

PACKING

803

811

812

PLUG ASS'Y 1WAY

PLUG ASS'Y 2WAY

OPTIONAL PARTS

3-1

SECTION 3

ELECTRICAL

CONTENTS

OVERALL WIRING DIAGRAM..............................3-2

VCR PART

ELECTRICAL ADJUSTMENT

PROCEDURES............................................................3-3

VCR ELECTRICAL TROUBLESHOOTING

GUIDE.............................................................................3-4

1. POWER(SMPS) CIRCUIT .......................................3-4

2. SYSTEM/KEY CIRCUIT ..........................................3-7

3. SERVO CIRCUIT.....................................................3-8

4. Y/C CIRCUIT..........................................................3-11

5. HI-FI CIRCUIT .......................................................3-15

6. TUNER/IF CIRCUIT...............................................3-18

BLOCK DIAGRAMS................................................3-20

1. POWER(SMPS) BLOCK DIAGRAM......................3-20

2. AVCP BLOCK DIAGRAM ......................................3-22

3. SYSTEM BLOCK DIAGRAM .................................3-24

4. JACK BLOCK DIAGRAM ......................................3-26

5. STUNER/MTZ BLOCK DIAGRAM.........................3-28

6. AVCP BLOCK DIAGRAM ......................................3-30

CIRCUIT DIAGRAMS..............................................3-32

1. POWER(SMPS) CIRCUIT DIAGRAM ...................3-32

2. TU/IF CIRCUIT DIAGRAM ....................................3-34

3. A/V CIRCUIT DIAGRAM........................................3-36

4. HI-FI CIRCUIT DIAGRAM .....................................3-38

5. SYSTEM CIRCUIT DIAGRAM...............................3-40

6. JACK CIRCUIT DIAGRAM ....................................3-42

7. TIMER CIRCUIT DIAGRAM( 2 TOOL ) .................3-44

8. TIMER CIRCUIT DIAGRAM( 3 TOOL, 8 TOOL ) ..3-46

9. TIMER CIRCUIT DIAGRAM( 4 TOOL ) .................3-48

10. TIMER CIRCUIT DIAGRAM( 6 TOOL ) ...............3-50

11. TIMER CIRCUIT DIAGRAM( 7 TOOL ) ...............5-52

• WAVEFORMS .........................................................3-54

• CIRCUIT VOLTAGE CHART ...................................3-56

PRINTED CIRCUIT DIAGRAMS.........................3-58

1. VCR P.C.BOARD...................................................3-58

2. SMPS P.C.BOARD ...............................................3-60

3. JACK P.C.BOARD ................................................3-62

4. KEY P.C.BOARD .................................................3-64

5. TIMER P.C.BOARD .............................................3-64

VDR PART

VDR ELECTRICAL TROUBLESHOOTING

GUIDE...........................................................................3-66

1. POWER(SMPS) CIRCUIT .....................................3-66

2. NO COMPONENT VIDEO SIGNAL WHEN

PLAYING DISC......................................................3-68

3. NO COMPOSITE / S-VIDEO SIGNAL WHEN

PLAYING DISC......................................................3-69

4. NO TV, EXTERNAL INPUT VIDEO SIGNAL.........3-70

5. WHEN PLAYING DISC, NO AUDIO OUTPUT ......3-71

6. NO TUNER AUDIO OUTPUT................................3-71

7. NO OPTICAL / DIGITAL OUTPUT ........................3-71

8. NO EXTERNAL INPUT 1, 2 AUDIO ......................3-72

9. NO EXTERNAL INPUT 3 AUDIO ..........................3-72

BLOCK DIAGRAMS................................................3-73

1. VDR SET TOTAL BLOCK DIAGRAM ....................3-73

2. VDR MAIN H/ W BLOCK DIAGRAM.....................3-74

3. POWER BLOCK DIAGRAM ..................................3-75

4. AUDIO IN/ OUT BLOCK DIAGRAM ......................3-76

5. CPU & CONTROL REGISTER

BLOCK DIAGRAM.................................................3-77

6. VIDEO IN/ OUT BLOCK DIAGRAM ......................3-78

7. DV 1394 IN/OUT BLOCK DIAGRAM ....................3-79

8. MEMORY CARD IN/ OUT BLOCK DIAGRAM ......3-80

CIRCUIT DIAGRAMS..............................................3-81

1. BGA 308P CIRCUIT DIAGRAM.............................3-81

2. DDR & B TO B CONNECTOR

CIRCUIT DIAGRAM ..............................................3-83

3. POWER, FLASH, CONNECTOR CIRCUIT

DIAGRAM ..............................................................3-85

4. RST, CONTROL/STATUS_REG., ATAPI,

HOST_CPLD, LATCH CIRCUIT DIAGRAM ..........3-87

5. VIDEO_IN, VIDEO_OUT CIRCUIT DIAGRAM......3-89

6. DV1394, HDMI CIRCUIT DIAGRAM .....................3-91

7. AUDIO IN/OUT CIRCUIT DIAGRAM .....................3-93

• WAVEFORMS .........................................................3-95

• CIRCUIT VOLTAGE CHART ...................................3-97

PRINTED CIRCUIT DIAGRAMS.........................3-99

1. VDR P.C.BOARD(TOP VIEW)...............................3-99

2. VDR P.C.BOARD(BOTTOM VIEW).....................3-101

3-2

SPD.F

GND

INTR/PROG

GND

RADIO'H'

AMP ON

VDR REDET

VDR CLK

DATA(VCR-VDR)

DATA(VDR-VCR)

VDR ENA

AMP CLK

AMP RX

AMP TX

AMP READY

AMP MUTE

P6603

P6602

PM601PN302

PN302

PN301

PMD01PMD02

PN304

CON401

PPM01

P101

P3D01P3D03

P104

P103

P104

P3D02

PMC01

P3D03 P3D01

PN303

PM602

PM603 P6M01

13.5VA(DRUM)

A/E(-)

A/E(+)

CFG

CAP.VCC

SERVO VCC

CAP.REV'H'

I-LIMIT

MOTOR GND

S.GND

DRUM VCC(13.5VA)

CAP.CTL

L/M CTL

DPG/DFG

DRUM CTL

8.7V

GND

R493

OVERALL WIRING DIAGRAMS

3-3

ELECTRICAL ADJUSTMENT PROCEDURES

1. Servo Adjustment

1) PG Adjustment

• Adjustment And Specification

• Test Equipment

a) OSCILLOSCOPE : NTSC SP TEST TAPE

MODE

PLAY

• Adjustment Procedure

a) Insert the SP Test Tape and play.

b) Connect the CH1 of the oscilloscope to the H/SW and CH2 to the “VCR VIDEO” TP for the VCR.

c) Trigger the mixed Combo Video Signal of CH2 to the CH1 H/SW, and then check the distance (time dif-

ference), which is from the selected A(B) Head point of the H/SW signal to the starting point of the ver-

tical synchronized signal, to 6.5H ± 0.5H (416µs, 1H=64µs).

• PG Adjustment Method

a-1) Playback the SP standard tape

b-2) Wait for 3seconds with F/P “REC” key and “PLAY” key presseed at the same time. < Digitron[ - - ] >

c-3) Repeat the above step(No.b-2), then it finishes the PG adjusting automatically. < Digitron[ PG ] >

d-4) Stop the playback, then it goes out of PG adjusting mode after mony the PG data.

• CONNECTION

• WAVEFORM

V.Out

H/SW(TP) R/C TRK JIG KEY 6.5 ± 0.5H

MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION

H/SW

(TP)

(VCR

VIDEO)

(CH2)

(CH1)

OSCILLOSCOPE

CH1 CH2

R/C KEY

H/SW

(TP)

VCR BOARDVDR BOARD

"VCR VIDEO" TP

VCR PART

H/SW

Composite

VIDEO

6.5H(416µs)

3-4

VCR ELECTRICAL TROUBLESHOOTING GUIDE

1. Power(SMPS) CIRCUIT

NO 5.3VA.

Replace the F101

(Use the same Fuse)

Is the F101 normal?

Is the TH01

Normal?

Is the BD101

Normal?

Replace the BD101

Replace the TH01

Is the D102

normal?

Check or Replace

the D102

Replace the D121

Replace the IC103

Replace the D126

Replace the D129

Replace the D130

Replace the D127

Replace the D128

YES

Is the Vcc (14V - 17V)

supplied to IC101 Pin7?

Is the D121

normal?

Is there about 2.5V

at the IC103 Pin1?

Is the D126

normal?

Is the D129

normal?

Is the D130

normal?

Is the D127

normal?

Is the D128

normal?

YES

Power Line of Main

PCB(VCR) is short

3-5

VCR ELECTRICAL TROUBLESHOOTING GUIDE

No 12VA

Check or Replace

the D126

Is the Vcc(13V)

supplied to C130?

Check or Replace

the Cap / Drum

Is the D132

Normal?

NO Replace the D132

YES

(To Cap, Drum Motor )

No REG 12V

Check or Replace

the D126

Check the ‘PWR CTL

“H”’signal from µ-com

Check the 33V Line

Replace the Q126

Is the Vcc(13V) sup-

plied to Q126Collector?

Is the Vcc(33V) sup-

plied to Q126 Base?

Is the Q126 Nomal?

Check or Replace

the D126

YES

NO VFD

Check or Replace

the R107

Is the R107

Normal?

Is the D128

Normal?

Check or Replace

the D128

Check or Replace

the ZD151

YES

Is the ZD151

Normal?

Check or Replace

the D127

YES

No 33V

Check or Replace

the D130

Is the Vcc(33V) sup-

plied to Q123 Emittor?

Is the Q123 Base

‘H’?

Check the ‘PWR CTL

“H”’signal from µ-com

YES

Check or Replace

the Q123

YES

3-6

VCR ELECTRICAL TROUBLESHOOTING GUIDE

No 28V (HSR)

Check or Replace

the D129

Is the Vcc(30V) supplied

to Q120 Collector?

Is the Vcc(33V) supplied

to Q121 Collector?

Is the Vcc(30V) sup-

plied to Q120 Base?

NO Check or Replace

the ZD153

Check the ‘HSR “H”

signal from µ-com

Check or Replace the

Q121/Q122 & 33V line

YES

Check or Replace

the Q120

YES

3-7

2. SYSTEM/KEY CIRCUIT

(1) AUTO STOP

(2) The unstable loading of a Cassette tape

Auto Stop

Does the H/SW waveform

appear at IC501 Pin18?

Do the T-UP Reel Pulses

appear at IC501 Pin80?

Is 12V applied to PMC01

Pin8?

Check the Drum Motor

signal.

Check the Power Circuit.

Check the power.

Is 5.0V applied to the

R531?

Refer to SMPS 5.3VA

troubleshooting.

Check IC501

Pins22, 23, 24, 25.

Does 5.0V appear at the

RS501?

Replace the T/UP Reel

Sensor (RS501).

Check the CST SW and

the peripheral circuitry.

Replace the IC501.

The unstable loading of a

Cassette tape

Does the “H” signal appear

at IC501 Pin58 during

inserting the CST ?

Does the “L” signal appear

at IC501 Pin10 while

inserting the CST?

Check the Deck

Mechanism.

Note : Auto stop can occur because Grease or Oil has dried up

YES

YES YES

YES

NO NO

YES

VCR ELECTRICAL TROUBLESHOOTING GUIDE

3-8

3. SERVO CIRCUIT

(1) Unstable Video in PB MODE

Does the Noise level of the

screen change

periodically?

Do the CTL pulses appear

at IC501 Pin97?

Is adjusting the height of

the CTL Head accurate?

Readjust the height of the

CTL Head.

Replace the IC501.

Refer to “When the Y signal

doesn’t appear on the

screen in PB Mode”.

Does the CFG waveform

appear at the IC501 pin87?

On tracking, do the CTL

pulses move?

Does the Video Envelope

waveform appear at IC501

Pin9?

Replace IC501.

YES

NO NO

(2) When the Drum Motor

(2) doesn’t run. Do the DFG Pulses appear

at PMC01 Pin11?

Replace the Cap M.

Aren’t the foil patterns and

the Components between

IC501 Pin 90 and PMC01

Pin11 shorted?

Replace the IC501.

Refer to “(2)

No 12VA of Power section”

Do the Drum PWM Pulses

appear at IC501 Pin76?

Aren’t the foil patterns and

the Components between

IC501 Pin76 and PMC01

Pin12 shorted?

Do the DFG Pulses appear

at IC501 Pin90?

Do the Drum PWM Pulses

appear at IC501 Pin76?

Are the connecting patterns and the Components

between IC501 Pin76 and PMC01 Pin12 shorted?

When the Drum Motor

doesn’t run,

Does 12V appear at

PMC01 Pin8?

Does 2.8V appear at

PMC01 Pin12?

Check the connector

(PMC01) and the Drum

Motor Ass’y.

YES

VCR ELECTRICAL TROUBLESHOOTING GUIDE

3-9

Does the CFG signal appear at

PMC01 Pin1?

Does the PWM signal appear at IC501

Pin77?

Does 2.8V appear at PMC01 Pin9?

Check the PMC01 and the Capstan

Motor Ass’y.

Does the Capstan PWM signal appear at

IC501 Pin77?

Aren’t the foil patterns and Components

between IC501 Pin77 and PMC01

Pin9 short?

Does the CFG signal come into IC501

Pin87?

Aren’t the foil patterns and Components

between IC501 Pin77 and PMC01

Pin9 short?

2. SERVO CIRCUIT

(3) When the Capstan Motor doesn’t run,

YES

When the Capstan Motor doesn’t run,

Does 12VA appear at PMC01?

YES

Replace the IC501.

YES

Refer to “SMPS(CAPSTAN/12Volt)

Trouble Shooting”.

Aren’t the foil patterns and component

between IC501 Pin87 and PMC01

Pin1 shorted?

Check the Capstan Motor Ass’y.

VCR ELECTRICAL TROUBLESHOOTING GUIDE

3-10

Keys do not work

Is 5V applied to IC501

Pin99?

Does FLD change when

a function button is

pressed?

Refer to “SMPS 5.3VA

Trouble Shooting”.

Replace the defective

switches.

YES

2. SERVO CIRCUIT

(4) Keys do not work

VCR ELECTRICAL TROUBLESHOOTING GUIDE

3-11

4. Y/C CIRCUIT

(1) No Video in EE Mode,

No Video in EE Mode

Does the Video signal

appear at IC301 Pin15? Check the Tuner Part

Is REG 5.0V applied to

IC301Pins4, 22, 47, 50, 52,

60, 84, 92?

Does the Video signal

appear at IC301 Pin29?

Does the Video signal

appear at the PMD02

Pin7?

Does the Video signal

appear at the PMD02

Pin5?

Check the 5.0V, 5.3VA

Line. (Power Circuit)

Is I2C BUS signal applied to

the IC301 Pins73, 74?

Check C327. (AGC)

Replace IC301.

Check the Video Buffer

Q310, Q605.

Check the DVD Board

Video path.

Check the System Circuit.

(Refer to ‘SYSTEM I2C BUS

CHECK Trouble Shooting’)

YES

Does the Video signal

appear at the IC601

Pin4?

Check PMD02 Pin5 and

IC601 Pin4

YES

Replace IC601?

VCR ELECTRICAL TROUBLESHOOTING GUIDE

3-12

3. Y/C CIRCUIT

(2) When the Y(Luminance) signal doesn’t appear on the screen in PB Mode,

Is 5.0V 5.3VA applied to IC301

Pins22, 47, 50, 52, 60, 84, 92?

Is I2C BUS signal applied to

the IC301 Pins73, 74?

Does the normal RF signal

appear at IC301 Pin 76?

Check the line of the 5.0V

5.3V Line. (Power Circuit)

Check the System Circuit.

(IC501 Pin23)

Check the V.H.S/W level.

(Check R342)

Refer to ‘SYSTEM I2C

BUS CHECK Trouble

Shooting’.

Is the V.H.S/W signal

applied to IC301 Pin80?

Is the V.H.S/W “H” about

3.4V at the IC301 Pin80?

Clean the Drum.

Check the path of the

Y(Luminace) RF signal.

Does the Y(Luminance)

RF signal appear at

IC301 Pin33?

Is the Y(Luminance) Video

waveform showed up at

IC301 Pin43?

Replace IC301.

YES

Replace the IC301.

VCR ELECTRICAL TROUBLESHOOTING GUIDE

3-13

3. Y/C CIRCUIT

(3) When the C(Color) signal doesn’t appear on the screen in PB Mode,

Is 5.0V 5.3VA applied to the IC301

Pins22, 47, 50, 52, 60, 84, 92.

Does the Color signal

appear at IC301

Pin29?

Check the line of the 5.0V

5.3VA Line. (Power Circuit)

Replace the X301.

Check the Color Pass.

Does the X301

(3.58MHz) osxillate?

Replace the IC301.

Does the Color signal

appear at IC301 Pin42?

Replace the IC301.

YES

NO NO

VCR ELECTRICAL TROUBLESHOOTING GUIDE

3-14

3. Y/C CIRCUIT

(4) When the Video signal doesn’t appear on the screen in REC Mode,

VCR ELECTRICAL TROUBLESHOOTING GUIDE

Is the EE signal normal?

Does the RF signal

appear at the IC301

Pin76?

Check EE Mode.

Check the System of REC

‘H’.(the IC501 Pin74)

Replace the IC301.

Is the REC ‘H’ signal

(about 4V) applied to the

OSC?

Check the circuit of the

IC301 Pin86, 90.

Check REC Luminace

pass & Color pass.

Does the REC RF signal

appear at the IC301

Pins86, 90?

YES

Is 5.0V 5.3VA applied to

the IC301 Pins22, 47, 50,

52, 60, 84, 92?

Check the line of the 5.0V

5.3VA line. (Power Circuit)

YES

Does PB Mode operate

nomally?

NO Check PB Mode.

YES

Check the Drum & Drum

Connector

YES

3-15

VCR ELECTRICAL TROUBLESHOOTING GUIDE

5. Hi-Fi CIRCUIT

(1) No Sound(EE Mode)

YES

No Sound.

Check the DVD Audio of IC801

Pins2, 4.

Check the 74 Audio of IC801

Pins48.

Check the Vcc of IC801 Pins25, 40, 51,

58.

YES

Check the IIC Clock and DATA at

IC801 Pins42, 43.

YES

Check the Audio of IC801 Pins53, 57.

Check the SC901, JK601.

Check the DVD Audio out.

Check the Tuner Part

Check the Power 5.0V, 12V.

YES

Check the IC501 Pins71, 72.

Replace IC801.

Check the Audio of PMD02 Pin19, 21. Check the Pcb Pattern between IC801

Pin53, 57 with PMD02 Pin19, 21.

YES

Check the Audio of PMD02 Pin23, 25. Check the DVD Board Audio path.

Check the AV1 Audio of IC801

Pins9, 14. Check the AV1 Jack.

Check the AV2 Audio of IC801

Pins10, 15 Check the AV2 Jack.

3-16

VCR ELECTRICAL TROUBLESHOOTING GUIDE

3. Y/C CIRCUIT

(2) Hi-Fi Playback

YES

PB mode

No Sound.

Check the Vcc of IC801

(Pins25, 40, 51, 58)

Check the Hi-Fi Selection switch.

(IC801 Pin41) and the Tape quality.

Is the RF Envelope at IC801

Pin30 over 300mVp-p?

Check IC801 Pin42(Data),

Pin43(Clock)

YES

Do Audio Signals appear at

IC801 Pin22(L-CH), 24(R-CH)?

YES

Do Audio Signals appear at

IC802 Pin53(L-CH), 57(R-CH)?

YES

Check the Audio of

PMD02 Pins19, 21

YES

Check the Audio of

PMD02 Pins23, 25

YES

Check the JK601

Check Power 5.0V, 12V.

Check IC501 Pin27

(A.H/SW)

Is Pin29 of IC801 over

3.5V

Check Rec ‘H’ signal of

µ-com.

NO Is the head Switching signal

IC801 Pin27 ok?

YES

Is the head Switching signal

IC801 Pin27 ok?

Check the parts of µ-COM

(IC501 Pins17, 18)

Check the Connection at

P3D01 Pins7, 9.

Replace IC801.

Check the PCB pattern between IC801

Pins3, 5, 7 with PMD02 Pins19, 21

Check the DVD Board

Audio Part

3-17

(3)

Hi-Fi REC.

It can’t be recorded Hi-Fi Audio

signal.

Check Vcc of IC801. (Pins25, 40, 51, 58)

YES

Check IC801 Pin42(Data), Pin43(CLOCK).

YES

Do Audio signals appear at IC801

Pins53, 57?

YES

Do FM Audio signals appear at IC801

Pin36?

YES

Check the Contact Point of Drum

Connector if good then Replace the Drum.

YES

Check Power 5V, 12V.

Check ports of µ-COM.

(IC501 pins 71, 72)

Check Audio input signal of IC801

Pins2, 4, 9, 10, 14, 15, 48.

Replace IC801.

VCR ELECTRICAL TROUBLESHOOTING GUIDE

3-18

VCR ELECTRICAL TROUBLESHOOTING GUIDE

7. Tuner/IF CIRCUIT

(A)

No Video on TV screen.

Is Tuner mode selected?

YES

changer to Tuner mode using remocon.

Is “TV” displayed on FLD displayed

YES

Is +5V applied to TU701 Pin 3?

Is “High” applied to TU701 Pin 4?

YES

Does the Video signal appear at Pin 16

of TU701?

YES

Replace TU701

YES

Set TV/VCR SW to VCR using remocon.

YES

Check 5V Line.

Check the voltage at Pin26 of IC501.

(“H” for tuner mode)

Check the path form Pin23 of IC601

to the Pin 5 of TU701.

3-19

VCR ELECTRICAL TROUBLESHOOTING GUIDE

(B)

No TV sound.

Check the Vcc of IC801(Pin58).

YES

Check Power (Vcc 12V)

Check IC801 Pin 43(DATA),

Pin 42(CLOCK) “HIGH”?

YES

Check IC801 Pin 48(TUNER SIF).

Replace IC801.

YES

Check IC501 Pin 71(CLOCK),

Pin 72(DATA)

YES

Check TU701 Pin 13

(TUNER Audio Output)

FUSE

(F101)

NOISE FILTER

BLOCK

(C101,L102,

L101, C102)

SNUBBER

BLOCK

(D103,C115,C116

,R112,R115)

DRIVE & S/W BLOCK

(IC104, D104, R113,

C117,C114,C119,

ZD102)

BD101 TH01

Y-CAP

C110

Y-CAP

C111

BR BL

(BK)(WH)

2.5V

3.3V

TO VDR

(P102)

C103

12V

5.0V

TO LOADER

(P103)

FD(+)

FD(-)

-28VA

TO VCR

(P101)

5.3VA

5.0V

Cap Vcc

12VA(DRUM)

33V

REG 12V

PWR CTL 'H'

HSR 'H'

DVD PWR CTL

5.0V

SNUBBER

BLOCK

(D101,C105

C106,R103)

DRIVE & S/W BLOCK

(IC101, D102, R105,

C108,C112,C120,

ZD101)

T101

T102

PHOTO COUPLER

(IC102)

ERROR AMP

(IC103)

FEED-BACK

BLOCK

R121,R122,

C121,R123.

R124.R125

R126)

RECTIFIER &

SMOOTING BLOCK

(D128,C133,R130) RECTIFIER &

SMOOTING BLOCK

(D127,C131,L125,C132)

RECTIFIER &

SMOOTING BLOCK

(D125,C139,L127,C140)

RECTIFIER &

SMOOTING BLOCK

(D124,C129)

RECTIFIER &

SMOOTING BLOCK

(D123,C126,L124,C127)

RECTIFIER &

SMOOTING BLOCK

(D122,C123,L123,C125)

PHOTO COUPLER

(IC105)

ERROR AMP

(IC106)

FEED-BACK

BLOCK

R131,R132,

C141,R133.

R161.R162

R163)

12V REG & S/W Block

(IC157,R156,C155) -12V

12V

1.8V

8.7V

TO FAN

(P104)

RECTIFIER &

SMOOTING BLOCK

(D129,C128,R147)

RECTIFIER &

SMOOTING BLOCK

(D130,C137,R146)

5.0V REG & S/W Block

(IC151,R151,C151)

1.8V REG & S/W Block

(IC160,R159,C152,

R167,R168)

3.3V REG & S/W Block

(IC154,R154,C154)

RECTIFIER &

SMOOTING BLOCK

(D126,C136,L122,C130)

RECTIFIER &

SMOOTING BLOCK

(D121,C122,L121,C124)

HSR S/W Block

(Q120,ZD153,C135,

R144,R145,D155,C157)

12V REG & S/W Block

(Q126,R150,ZD152,

C156,C153)

5.0V S/W Block

(Q124,R140,R135,R136

D134,C134)

33V S/W Block

(Q123,R143,R134)

HSR CTL Block

(Q121,Q122,R141)

PWR CTL Block

(Q125,R137,R138)

2.5V REG & S/W Block

(IC152,R169,C150)

PHOTO COUPLER

(IC107)

S/W Block

(Q111)

3-20 3-21

BLOCK DIAGRAMS

1. POWER(SMPS) BLOCK DIAGRAM

73 6574

IC301

HA118725NF

79 78

68 71

3640383723 26

57 45 46

EP CH2

EP CH1

V. OUT

D-V SYNC

(FROM u-COM) System

Y-CCD

C-CCD

CLOCK Drive

LPF

REC-AMP

SP CH2

REC-AMP

SP CH1

REC-AMP

EP CH2

REC-AMP

EP CH1

DATA

(FROM u-COM) System

CLOCK

(FROM u-COM) System

V.H/SW30

(FROM u-COM)

V.ENV

(TO u-COM)

System

SP CH2

SP CH1

Serial Cont

interface

X-tal

VCO/OSC

TRAP FM AGC P.EQ G.EQ D LIM Y LPF

Main

De-Empf

DEMO

S LPF

2M LPF ACC CTL Trap

fh Trap

HIFI Trap C LPF DEALY

MIX

AMP

SQUEL CH

CLEAR

SYNC

CLAMP

Sharpness

CONTROL

YNR NC

SYNC SEP

De-eMPH

VCA

C.K

LPF

BDBPF

CCD LPF APC/ACC

DET

L- DET

Main

Conv2

Main

Conv1

FBC

Video ALC

2HD Model Only

4HD/4HD Hi-Fi Model Only

3-22 3-23

2. AVCP BLOCK DIAGRAM

1) PB Mode

++++

15 17 19 18 36 40 38 37 51 36 30 32 9 8 11

S/W

VIDEO IN

DVD

VIDEO IN

45 57 7365 74 6867

ATT

-10dB

VIDEO

AGC

CLEAR

SYNC

V. OUT

D-V SYNC

Y-CCD

C-CCD

CLOCK Drive

6dB

AMP

FBC

Video ALC

SQUEL CH

ATT

-10dB

ATT

-10dB

LPF

AGC DET

CLAMP

Y-LPF

YNR

CLAMP

SYNC

SEP

D.E.

C-LPF

SPFACC

C-LPF

NL Emph LPF

LPF

HPF VCA

TRAP

FBC

ALC

Main

Conv2

Main

Conv2

APC/ACC

DET

Main

Emph FM

MOD

REC

Trap

REC-AMP

SP CH2

REC-AMP

SP CH1

REC-AMP

EP CH2

REC-AMP

EP CH1

MIX

ATT

B.E

C.K

CCD

LPF

L-DET

VCD

(-4dB)

f0=1.68M

f/0DEV

Adjst

X-tal

VCO/OSC

Serial Cont

interface

DATA

(FROM u-COM) System

CLOCK

(FROM u-COM) System

V.H/SW30

(FROM u-COM)

System

SP CH2

SP CH1

EP CH2

EP CH1

2HD Model Only

4HD/4HD Hi-Fi Model Only

IC301

HA118725NF

2) REC Mode

3-24 3-25

3. SYSTEM BLOCK DIAGRAM

GND

MODE S1

MODE S2

MODE S3

MODE S4

MODE S/W

TO/FROM AVCP

T-UP REEL

T-UP END

SUP REEL

CST.SW/REC TAP

CS501

5.3VA

ES501

R550

LD501

DECK IR LED

R553

R555

RS501

RS502

R556

R558 C582

R538

R535

R537

R536

C534

R544

C552

R5C6 C500 C517 R541

R529 R583

L512

MS501

To/FROM DVD

X502

14MHz

32.768KHz

OSC

X501

RESET

GND

Vcc

5.3VA

IC504

+ +

C592

+C503

L501

R557

SUP END

ES502

C535

R564

R531

R/C

RC601

+C561

TO/FROM DECK

Q503

Q501

CV IN

88 49 40 37

IC501

M37760

MODE S1

I-Limit

MODE S2

MODE S3

MODE S4

62 VDR ENA

66 VDR DATA

65 VCR DATA

67 VCR ENA

T-UP Sensor

T-UP Reel

SUP Reel

CST IN

Vss (AMP)

Vss (OSD)

Vss (SYSCON)

Vcc

(SYSCON)

Vcc

(SERVO)

CAP. PWM

CTL +

CTL -

CFG

CAP. REV 'H'

LD CTL

V. ENV

V.H.SW30

DPG

D.V.Sync

39 X out

Xc in

Xc out

X in

95 94 87 12 59 918

76 90 13

H.A.SW

DRUM PWM

Vcc (OSD)

20 SUP Sensor

14 99

Vcc (A/D)

TO/FROM AUDIO(Hi-Fi)

TO/ FROM TU/IF

100

VCR 'H'

IIC DATA

IIC CLK

CV OUT

AFT

POWER FAIL 78

A. MUTE 'H'

A. ENV

A. H.SW

REC 'H' 74

IIC CLK

IIC DATA

50 COMP IN

REC 'H'

C.ROT

A.MUTE'H'

FLD DATA

FLD ENA

FLD CLK

2 GND

Vcc

IC505

IC5F1

DISPLAY

LGXBR446 (LGEUS)

3-26 3-27

6 21

3 5 1

226

10 20

12 18

1) Front Video

3) Mixed Video

5) VDR CVBS

7) VCR Video

9) Y (Super)

11) C (Super)

13) Y

15) Pb

17) Pr

19) VCR A-L

21) VCR A-R

23) VDR A-L

25) VDR A-R

27) Front A-L

29) Front A-R

To.AVCP

From

AVCP

VIDEO SW IC

IC601

VIDEO AMP IC

JK601

A/V JACK

IEC-958

From PMD01 Pin

From/To Hi-Fi IC801

To Hi-Fi

AV1 Video in

AV1 Audio in

(L/R)

To TUNER

MOD VIDEO

JK603

Optical Jack

Video Out

Y Out (Super)

C Out (Super)

Y Out (Comp)

Pb Out (Comp)

Pr Out (Comp)

Audio Out L

Audio Out R

Coaxial Out

PMD02

LGXBR446 (LGEUS)

4. JACK BLOCK DIAGRAM

3-28 3-29

5. STUNER/MTZ BLOCK DIAGRAM

A.IN

CH S/W

REG 5V

CONTROL

V.IN

RF AGC

ENABLE

CLOCK

DATA

AFT

A.OUT

SIF

TU 30V

V.OUT

999 GND

100AFT

731TU.V.OUT

716 MOD A.IN

61 MOD CTL

106 5V

26 VCR 'H'

671 MOD VEDIO

71 IIC CLK

72 IIC DATA

781 SIF OUT

LGXBR446 (LGEUS)

45833V

3-30 3-31

(System)

IC801

AN3662(AN3663)

IC301

HA118725NF

VCA

AMP

626 A. OUT (R)

DATA

CLOCK

/P HEAD

N.A.IN

73 74

From u-COM

57 A. OUT (L)

OUTPUT

SELECTOR

6. AVCP BLOCK DIAGRAM

1) EE Mode

(System)

IC801

AN3662(AN3663)

IC301

HA118725NF

VCA

AMP

626 A. OUT (R)

DATA

CLOCK

/P HEAD

N.A.IN

73 74

From u-COM

57 A. OUT (L)

OUTPUT

SELECTOR

2) PB Mode

IC301

HA118725NF

IC801

AN3662(AN3663)

TUNER

TU701

2DET

NORMAL

AUDIO

OUT

A.OUT'R'

DVD

A.OUT'L'

AUDIO

OUT

DVD'R'

DVD'L'

18 48

LINE 1 'R'

LINE 1 'L'

LINE 2 'R'

LINE 2 'L'

VCA

REC

AMP 98

3) REC Mode

3-32 3-33

A B C D E F G H I J K L M N O P Q R ST

30VA No Power

D130 is Defective

No Power

BD101,TH01 is Defective

-28VA No Power

D127 is Defective

No Power

D102 is Defective

5.3VA No Power

D121 is Defective

Switching Error

IC102,IC103 are Defective

No Power

F101 is Defective 3.3V No Power

D122 is Defective

Switching Error

IC105,IC106 are Defective

S/W Error

IC107,Q111 is Defective 12V No Power

D125 is Defective

28V No Power

D129 is Defective

12V No Power

D126 is Defective

12V No Power

Q125 or ZD152 are Defective

12V No Power

IC157 is Defective

2.5V No Power

IC152 is Defective

5V No Power

IC151 is Defective

1.8V No Power

IC160 is Defective

3.3V No Power

IC154 is Defective

5V No Power

D124 is Defective

1.8V No Power

D123 is Defective

No Digitron Displayed

D128,R107,ZD151 are Defective

S/W Error

IC101,IC104 is Defective

28V No Power

Q120 or ZD153 are Defective

NOTES) Symbol denotes AC ground.

NOTES) Symbol denotes DC chassis ground.

NOTE) Warning

NOTE) Parts that are shaded are critical

NOTE) With respect to risk of fire or

NOTE) electricial shock.

CIRCUIT DIAGRAMS

1. POWER(SMPS) CIRCUIT DIAGRAM

IMPORTANT SAFETY NOTICE

WHEN SERVICING THIS CHASSIS, UNDER NO CIR-

CUMSTANCES SHOULD THE ORIGINAL DESIGN BE

MODIFIED OR ALTERED WITHOUT PERMISSION

FROM THE ALLEGRO ELECTRONICS CORPORATION.

ALL COMPONENTS SHOULD BE REPLACED ONLY

WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL

CIRCUIT. SPECIAL COMPONENTS ARE SHADED ON

THE SCHEMATIC FOR EASY IDENTIFICATION.

THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF-

FER FROM THE ACTUAL CIRCUIT USED. THIS WAY,

IMPLEMENTATION OF THE LATEST SAFETY AND

PERFORMANCE IMPROVEMENT CHANGES INTO THE

SET IS NOT DELAYED UNTIL THE NEW SERVICE LIT-

ERATURE IS PRINTED.

NOTE :

1. Shaded( ) parts are critical for safety. Replace only

with specified part number.

2. Voltages are DC-measured with a digital voltmeter

during Play mode.

3-34 3-35

A B C D E F G H I J K L M N O P Q R ST

2. TUNER CIRCUIT DIAGRAM

3-36 3-37

A B C D E F G H I J K L M N O P Q R ST

WAVEFORM 4

8 1312

10 6

3. A/V CIRCUIT DIAGRAM

3-38 3-39

A B C D E F G H I J K L M N O P Q R ST

4. Hi-Fi CIRCUIT DIAGRAM

3-40 3-41

WAVEFORM

A B C D E F G H I J K L M N O P Q R ST

5. SYSTEM CIRCUIT DIAGRAM

3-42 3-43

A B C D E F G H I J K L M N O P Q R ST

6. JACK CIRCUIT DIAGRAM

A B C D E F G H I J K L M N O P Q R ST

3-44 3-45

7. TIMER CIRCUIT DIAGRAM( 2 TOOL )

3-46 3-47

8. TIMER CIRCUIT DIAGRAM( 3 TOOL, 8 TOOL )

A B C D E F G H I J K L M N O P Q R ST

3-48 3-49

9. TIMER CIRCUIT DIAGRAM( 4 TOOL )

A B C D E F G H I J K L M N O P Q R ST

3-50 3-51

10. TIMER CIRCUIT DIAGRAM( 6 TOOL )

A B C D E F G H I J K L M N O P Q RST

3-52 3-53

11. TIMER CIRCUIT DIAGRAM( 7 TOOL )

A B C D E F G H I J K L M N O P Q RST

3-54 3-55

WAVEFORMS

IC301 Pins 8, 9

PB mode

500mvp-p

IC301 Pins 15, 17,

19, 21

Video in 1Vp-p

IC301 Pin 31

PB/REC mode

4.0Vp-p

IC301 Pin 98

REC mode

1.1Vp-p

IC301 Pin 94

REC mode

2.0Vp-p

IC301 Pin 29

PB mode

2.02Vp-p

IC301 Pin 57

PB mode

400mVp-p

IC301 Pin 63

PB mode

400mVp-p

IC301 Pin 73

PB/REC mode

5Vp-p

IC301 Pin 74

PB/REC mode

5Vp-p

IC301 Pin 77

REC mode

340mVp-p

IC301 Pin 42

PB mode

300mVp-p

IC301 Pin 53

PB mode

400mVp-p

IC301 Pin 80

PB mode

3.6Vp-p

✦ IC301 Oscilloscope Waveform ✦ IC501 Waveform Photographs

V.HSW

(IC501 Pin 18)

1V/10mS

REC/PB MODE

DV.SYNC

(IC501 PIN 13)

1V/100uS

QUE/REV MODE

CTL(+)

(IC501 Pin 95)

1V/10mS

CTL(-)

(IC501 Pin 94)

1V/10mS

DFG/DFG

(IC501 PIN 90)

1V/10mS

REC/PB MODE

CFG

(IC501 Pin 87)

1V/10mS

V.IN

(IC501 Pin 49)

500mV/20uS

3-56 3-57

1 0.06 0.06

2 0.06 0.06

3 0.06 0.06

4 0.35 0.37

5 2.35 2.09

6 2.58 2.55

7 2.83 2.83

8 1.84 1.24

9 1.84 1.23

10 2.41 1.89

11 2.61 3.00

12 1.60 0.56

13 0.00 0.00

14 2.80 2.26

15 2.80 2.38

16 0.18 1.91

17 2.79 2.80

18 1.76 1.91

19 2.80 2.80

20 0.02 0.00

21 2.80 2.80

22 5.08 5.12

23 2.32 2.34

24 0.18 0.57

25 2.12 2.12

26 3.00 2.80

27 0.18 0.45

28 0.15 0.15

29 2.48 2.46

30 2.80 2.91

31 0.37 0.37

32 2.31 2.79

33 2.09 2.13

34 1.76 1.85

35 3.03 3.07

36 2.32 2.35

37 3.03 3.06

38 2.15 2.20

39 1.42 1.45

40 2.08 2.12

41 3.01 2.55

42 1.98 1.97

43 2.05 2.05

44 0.00 0.00

45 3.13 3.15

46 3.13 3.15

47 5.03 5.07

48 0.14 0.14

49 3.17 3.19

50 5.03 5.07

51 2.05 2.07

52 5.03 5.07

53 2.62 2.64

54 0.00 0.00

EE PLAY

MODE

PIN NO.

IC301 55 2.07 2.09

56 0.00 0.00

57 2.18 2.18

58 2.34 2.34

59 4.94 4.97

60 4.94 4.97

61 0.02 0.02

62 2.28 2.21

63 2.23 2.23

64 2.94 2.95

65 2.26 2.26

66 2.95 2.96

67 2.19 2.18

68 1.28 1.24

69 1.96 1.96

70 2.71 1.42

71 2.19 2.19

72 0.14 0.14

73 5.20 5.21

74 5.20 5.21

75 2.76 2.79

76 2.25 2.17

77 2.84 2.84

78 0.02 0.03

79 0.00 0.00

80 2.54 2.53

81 4.85 4.84

82 4.15 4.15

83 0.00 2.53

84 5.07 5.10

85 2.46 2.30

86 2.54 2.30

87 2.45 2.30

88 0.00 0.00

89 2.48 2.30

90 2.52 2.30

91 2.48 2.30

92 5.08 5.11

93 0.52 0.51

94 2.53 2.54

95 2.53 2.52

96 2.53 2.50

97 0.01 0.01

98 2.27 2.55

99 0.00 0.00

100 2.58 2.55

10 0

2 4.52 4.82

3 4.84 4.84v

4 4.64 4.58v

5 4.56 4.56v

6 80m 60m

70 0

8 4.98 4.98

EE PLAY

MODE

PIN NO.

• CIRCUIT VOLTAGE CHART

9 4.98 5.30

10 4.8 4.80v

11 4.82 4.82

12 4.72v 4.82

13 4.92 4.92

14 5.02 5.02

15 0 0

16 4.98v 4.98

17 5.04 5.04

18 4.98v 9.98

19 2.46v 2.46

20 3.36V 3.36

21 0 0

22 0 0

23 4.96v 4.96v

24 120mv 140m

25 4.94 4.94

26 4.92v 4.92v

27 20m 20mv

28 5.02 5.02v

29 4.98v 4.98

30 4.84v 4.84

31 5.00v 5.00v

32 0 0

33 4.98 4.94

34 0 5.00v

35 5.02 100m

36 3.16 3.12v

37 5.7v Da/Clk(5.5)

38 0 5.7v

39 520m 0

40 4.84 520m

41 4.83 Da/Clk(5.62)

42 4.86v 4.86v

43 0 0

44 5.02 5.0v

45 0 0

46 3.94 3.94v

47 2.88 2.88v

48 0 0

49 0.98 2.94

50 1.84 1.94v

51 0.98 4.78

52 3.28 3.28v

53 2.38 2.38v

54 2.52 2.54v

55 1.88 1.88

56 0 0

57 0 0

58 120m 120m

59 4.92v 4.92v

60 4.92v 4.92v

61 0 0

62 4.82 4.82v

63 3.98 3.98v

EE PLAY

MODE

PIN NO.

64 0 0

65 2.36 2.36v

66 0 0

67 4.68 9.68v

68 0 0

69 2.48 2.48v

70 2.48 2.48

71 0 0

72 2.48 4.98

73 4.92 4.92v

74 0 0

75 2.52 2.42

76 2.42 2.48

77 80m 80m

78 0 0

79 4.02v 4.96v

80 4.96v 4.96

81 2.8 280m

82 1v 2.62v

83 120m 3.24v

84 0 1.96

85 0 0

86 4.98 4.9v

87 4.98 4.98

88 5.0v 5.0v

89 0 0

90 4.88 4.88v

91 0 0

92 0 0

93 5.04v 5.04v

94 4.88 0

95 4.98 4.98

96 0 0

97 0 0

98 4.98 4.98

99 20m 4.98v

100 0 0

1 4.88 4.88v

2 1.46 1.48

3 1.38 1.38

40 0

5 2.26v 2.24

6 2.38 0

70 0

80 0

90 0

10 0 0

11 0 5.0v

12 5.0v 5.0

13 5.0v 0

14 0 0

15 0 0

16 0 0

17 0 0

EE PLAY

MODE

PIN NO.

IC751

IC501

18 0 0

19 4.88 4.88

20 0 0

21 0 0

22 0 0

23 0 0

24 0 0

25 0 0

26 0 0

27 0 0

28 0 0

29 0 0

30 2.96v 3.98

31 2.96 3.98

32 0 0

33 4.88v 4.88

34 3.64v 3.58v

35 0 0

36 2.62v 2.58

37 0 0

38 0 0

39 0 0

40 2.54v 2.54

41 2.54 2.56

42 2.48 2.48

43 2.3v 2.34

44 0 0

10 0

20 0

3 0 142M

4 DA/CL(5.34) DA/CL(5.34)

5 DA/CL(5.34) DA/CL(5.34)

60 0

7 DA/CL(5.34) DA/CL(5.34)

80 0

9 DA/CL(5.34) DA/CL(5.34)

10 DA/CL(5.34) DA/CL(5.34)

11 0 41M

12 DA/CL(2.82) DA/CL(2.82)

13 0 0

14 DA/CL(2.82) DA/CL(62M)

15 2.89 1.41

16 1.53 950M

17 DA/CL(1.14) DA/CL(810M)

18 0 0

19 5.26 5.24

20 5.26 5.24

1 3.28 3.24

2 3.28v 3.28

3 3.32 3.26

4 3.28 3.92

5 3.28 3.92

6 3.28 3.26

EE PLAY

MODE

PIN NO.

IC7V1

IC801

7 3.28v 3.74

8 3.28 3.24

9 3.28v 3.24

10 3.28 3.24

11 3.28v 3.26

12 0 0

13 3.78 4.52

14 0 0

15 0 640m

16 5.82 6.64

17 5.28v 6.68

18 0 620m

19 6.28 6.66

20 6.28 6.72

21 4.46v 4.42

22 3.28 4.02

23 3.62 3.68

24 3.74 4.12

25 3.74 3.76

26 0.1 640m

27 0 0

28 3.7v 3.68

29 3.66 3.64

30 0.7 680m

31 3.72 3.72v

32 3.74v 4.08

33 3.62 3.68

34 13.4v 13.32

35 580m 520m

36 0 520m

37 580m 520m

38 0 0

39 0 20m

40 4.7 4.76

41 0v 1.68

42 5.0v 5.04m

43 50.v 4.96

44 20m 3.38

1 4.76 4.68

2 2.02v 2.24

3 4.88 4.88

4 1.64 1.78

5 4.72 4.78

6 1.88 1.88

70 0

8 2.26 2.18

90 0

10 1.64v 1.72

11 0 0

12 1.92v 2.08

13 4.86 4.82

14 1.92v 2.08

15 0 2.31

16 2.26v 2.64

EE PLAY

MODE

PIN NO.

IC901

17 0 0

18 2.28 2.74

19 0 0

20 2.56v 2.58

21 2.64v 2.68

22 0 0

23 2.56v 2.92

24 0 0

25 0 0

26 2.52v 2.98

27 20m 0

28 4.72 4.68

1 2.51 2.51

2 2.39 2.39

3 3.54 3.53

4 2.57 2.56

5 1.52 1.34

6 0.43 3.68

7 1.3m 0

8 1.2m 0

9 3.04 3.03

10 2.52 2.52

11 2 2.05

12 3.22 1.97

13 3.99 3.99

14 2.5 2.495

15 3.11 1.93

16 3.2 3.18

17 27.4m 4.11

18 112.1m 3.35

19 2.27 2.26

20 1.99 2.12

21 2.31 2.37

22 0.78 0.81

23 5.02 5.01

24 5.02 5

25 2.44 2.27

26 2.44 2.26

27 2.82 2.85

28 181.5m 187.4m

29 371.6m 212.2m

30 2.08 2.08

1 3 2.99

2 36.3m 38.1m

3 3.04 3.04

4 6.4m 39.1m

5 3.04 3.04

6 5.02 5.03

7 2.24 2.23

80 0

1 6.71 6.66

2 5.05 5.05

EE PLAY

MODE

PIN NO.

IC901

IC302

IC804

3 6.02 5.96

40 0

5 6 5.96

6 5.99 5.94

7 22.3m 21.3m

8 6.68 6.65

9 6.7 6.67

10 1.1m 0

11 6.71 6.68

12 5.04 5.05

13 12.03 11.99

14 6.7 6.7

15 0 0

16 6.73 6.69

1 1.3 1.3

2 4.9 4.9

3 1.66 1.56

40 0

50 0

6 4.9 4.9

7 1.7 1.6

80 0

1 1.37 1.37

25 5

3 2.18 2.17

40 0

50 0

6 5.21 5.21

7 2 2.17

80 0

EE PLAY

MODE

PIN NO.

IC902

IC903

3-58 3-59

PRINTED CIRCUIT DIAGRAMS

1. VCR P.C.BOARD

3-60 3-61

2. SMPS P.C.BOARD

LOCATION GUIDE

3-62 3-63

3. JACK P.C.BOARD

( 6 TOOL )

LOCATION GUIDE

( 2 TOOL, 3 TOOL )

LOCATION GUIDE

( 4 TOOL, 8 TOOL )

LOCATION GUIDE

3-64 3-65

5. KEY P.C.BOARD 6. Timer P.C.BOARD

( 2 TOOL ) ( 2 TOOL )

( 3 TOOL ) ( 3 TOOL )

( 4 TOOL ) ( 4 TOOL )

( 6 TOOL ) ( 6 TOOL )

( 7 TOOL ) ( 7 TOOL )

( 8 TOOL ) ( 8 TOOL )

3-66

VDR ELECTRICAL TROUBLESHOOTING GUIDE

1. Power(SMPS) CIRCUIT

No 3.8VA

Replace the F101

(Use the same Fuse)

Is the F101

Normal?

Is the TH01

Normal?

Is the BD101

Normal?

Replace the BD101

Replace the TH01

Is the IC107,Q111

Normal?

Check or Replace

the IC107,Q111

Replace the D122

Replace the IC106

Replace the D123

Replace the D124

Replace the D125

YES

Is Vcc (14V-17V)

supplied to IC101 Pin7?

Are the D122

normal?

Is there about 2.5V

at the IC106 Pin1?

Is the D123

normal?

Is the D124

Normal?

Is the D125

Normal?

Power Line of Main

PCB(VDR) is short

VDR PART

No 3.3V

Check or Replace

the D122

Is there about 3.8V

at the IC154 pin1?

Check the IC154 and

Replace

Is there about 3.3V~ 5V

at the IC154 pin4?

Check the ‘DVD PWR CTL

“H”’ signal from µ-com

YES

3-67

VDR ELECTRICAL TROUBLESHOOTING GUIDE

No 2.5V

Check or Replace

the D122

Check the ‘DVD PWR CTL

“H”’ signal from µ-com

Is there about 3.8V

at the IC152 pin1?

Is there about 3.3V~

5V at the IC152 pin4?

Check the IC152

and Replace

YES

No 5.0V

Check or Replace

the D124

Is there about 5.5V

at the IC151 pin1?

Is there about 3.3V~ 5V

at the IC151 pin4?

Check the ‘DVD PWR CTL

“H”’ signal from µ-com

YES

Check the IC151

and Replace

YES

No 1.8V

Check or Replace

the D123

Is there about 2.3V

at the IC160 pin1?

Is there about 3.3V ~

5V at the IC60 pin4?

Check the ‘DVD PWR CTL

“H”’ signal from µ-com

Check or Replace

the R167,R168

YES

Are the R167,R168

normal?

YES

Check the IC160

and Replace

YES

No 12V

Check or Replace the

D125

Is there about 13.5V

at the IC157 pin1?

Check the IC157 and

Replace

Is there about 3.3V~

5V at the IC157 pin2?

Check the ‘DVD PWR CTL

“H”’ signal from µ-com

YES

3-68

2. No Component video signal when playing DISC

Component : No Y Signal Component : No Pb Signal Component : No Pr Signal

R905, C923 R904, C922 R903, C921

IC601 – 12

Check input

IC601 – 14

Check input

C907 C908

IC601 – 10

Check input

C906

FL505, FL506, FL507

Check Signal in DVD

Board

Check CLK X101

Check IC101 Power and

Other Circuits

YES

NO NO

VDR ELECTRICAL TROUBLESHOOTING GUIDE

3-69

VDR ELECTRICAL TROUBLESHOOTING GUIDE

3-69

3. No COMPOSITE / S-VIDEO signal when playing DISC

COMPOSIT : No Signal S-VIDEO : No Y Signal S-VIDEO : No C Signal

R911, C927 R902, C920 R901, C919

IC601 – 6

Check input

IC601 – 2

Check input

C904 C902

R4103, R4107

Check Signal

IC601 – 4

Check input

C903

IC5101-40 : HIGH

/RST_VENC

R154, R155

Signal and 3.3V level

IC5101 41,42

Check I2C Clk, Data

Check R5101 CLOCK

R5124~R5131

Check VO_D0 ~VO_D15

Check IC101 power

And Other circuits

IC5101 9~16 Check

MP7~MP0 signal

YES

YES YES

YES

NO NO

3-70

VDR ELECTRICAL TROUBLESHOOTING GUIDE

4. No TV, External Input video signal

No : TV signal AV3No : AV1 signal No : AV2 signal No : S-JACK

signal

TU701 1-19

Check signal

And circuit

IC802 - 1 IC802 - 3

IC501 – 1, 3, 8

check in the

DVD Board

Replace X501 X-

TAL

IC301 – 21

check

IC802 - 28 IC802 – 31

Check output

IC301 - 15

IC301 – 29 check

Q310 collector

Signal, power 12 V

C909, Q905

Check circuit

FL501

Check signal

YESYES YESYES

YES

YES YES

YES

IC502-34 : HIGH

/RST_VDEC

R4103, R4106

signal

YES

when reset IC502

– 28, 29 Check I2C

Clk, Data

Check R533,

R526 Signal and

3.3V level

YES

check IC502 - 40

(VI_CLK)

Check X501 clock

oscillated

YES

NO NO

<When playing DISC, no COMPONENT,

COMPOSIT/S-VIDEO signal> Check

IC502 -> IC101

Check VI_D0~VO_D9

signal

Check IC502

power and other

circuits

YES

NO IC301 - 17

NO NO

3-71

VDR ELECTRICAL TROUBLESHOOTING GUIDE

Check VCR PART

PN303-1 signal

normal

Check FFC Cable

Signal flow

YES

Audio output even

When playing DISC

PN304-19~22 Check

audio signals

Check FFC Cable

and VCR part

Check FFC Cable

and VCR part

Check IC801 power

and other circuits

Check AV_RST1 and

power, other circuits

YES

IC803 – 1, 7 Check

audio signals

YES

IC802-9 Check

High?

YES

Check IC802 power

And Other circuits

YES

5. When playing DISC, no audio output

6. No TUNER audio output

7. No OPTICAL / DIGITAL output

IC802 – 15, 18

Check audio signals

Check IC802 power

and other circuits

Check AV_RST1 and

power, other circuits

IC802-10 Check

High?

YES

Check IC802 power

And Other circuits

YES

3-72

VDR ELECTRICAL TROUBLESHOOTING GUIDE

3-72

<when playing DISC,

no audio output> check

Check FFC Cable

and VCR part

Audio output even

When playing DISC

PN304-19~22 Check

audio signals

IC802 – 15, 18

Check audio signals

Check IC802 power

and other circuits

Check AV_RST1 and

power, other circuits

YES

IC802-10 Check

High?

YES

Check IC802 power

And Other circuits

YES

<when playing DISC,

no audio output> check

Check Audio Cable

Audio output even

When playing DISC

PN5401 – 4~6 Check

audio signals

PN304-27~30 :

Check audio signals

Check PN302-5,6

and Front Jack Cable

Check FFC Cable

and VCR part

Check IC804 power

and other circuits

YES

PN304-19~22

Check audio signals

YES

IC804 – 10, 12

Check audio signals

YES

Check /RST-Audio and

power, other circuits

IC804-9 Check

High?

Check IC804 power

And Other circuits

YESYES

YES

IC802 – 15, 18

Check audio signals

Check IC802 power

and other circuits

Check AV_RST1 and

power, other circuits

YES

IC802-10 Check

High?

YES

Check IC802 power

And Other circuits

YES

Check IC804 power

and other circuits

IC804 – 10, 12

Check audio signals

YES

Check /RST-Audio and

power, other circuits

IC804-9 Check

High?

Check IC804 power

And Other circuits

YESYES

YES

8. No External Input 1, 2 audio 9. No External Input 3 audio

BLOCK DIAGRAMS

1. VDR SET TOTAL BLOCK DIAGRAM

DVD RW DRIVE

VCR BOARD

VDR BOARD

FRONT JACK BOARD

REAR JACK

ATA_RESET

ATA_address[4:0]

ATA_data[15:0]

ATA_INT / IORDY / DIOR / DIOW / DMAACK

AV2_IN

9_IN_2

Y/C 2

TP 4

BD[15:0] 16

BA[12:1] 12

CON[8:0] 9

AV1_IN

2Y/C S_Jack

2A_R/L Stereo

V_cvbs CVBS

3YPbPr YPbPr

VCR_A_R/L

Coaxial

Optical COAXIAL

OPTICAL

6D_out D2

TUNER

TU_AV_out

TU_AV_in

AV1 3

D_control

VDR_reset_L

Int_Prog

Serial Comm.

IEC958

V2_IN

YC_MIXER

A2_IN

A_IN

A_OUT

V_VCR_IN

CVBS_OUT

C_OUT

Y_OUT

G_Y_OUT

R_Pr_OUT

B_Pb_OUT

3-73

3-743-74

2. VDR MAIN H/ W BLOCK DIAGRAM

DMN Board

AI_D0

VI_D[2:9]

BIO_PHY_DATA[0:7]

HD[15:0]

DATA[15:0]

VO_D[7:0]

AO_D[3:0]

AO_IEC958

ADD[4:0]....

SIO_SPI_...

Front Jack

AV2_IN

9_IN_2

VIDEO_IN

UNIT

DV 1394

UNIT

AUDIO_IN

UNIT

MEMORY

CARD

UNIT

VIDEO_OUT

UNIT

AUDIO_OUT

UNIT

UCOM_IF

UNIT

VCR Board

AV2_IN

A_IN

V_VCR_IN

YC_MIXER

V2_IN

A2_IN

Y/C

YC_MIXER

V_VCR_IN

A_IN

BD[15:0]

BA[12:1]

CON[8:0]

HOST_IF

UNIT

S_JACK_DET

DVD-RW DRIVE

VCR Board

Y/Pb/Pr

VDR_A

Y/C/CVBS

A_OUT

Y/C/CVBS_OUT

G_Y/B_Pb/R_Pr

Serial Comm.

VDR_RESET_L

U-COM

IEC958 COX/OPT

D_Control D2

I/P

Int_Prog

CVBS

Y/C

R/G/B

VO_D[15:8]

DDR

Memory

Latch

74LVT16373

FLASH

Memory

CS0

BA[1:22]

BA[6:21]

BA[1:5,22]

HD[0:15]

EEPROM

SCL

SDA CPRM_crl

SCL

SDA

3-75

3. POWER BLOCK DIAGRAM

74ALVT16373

3V3D

3.3V

E5_1V81.8V

E5_3V3

SDRAM

SSTL2_VDD2.5V

DDR

E5_2V52.5V

VREF

G2995

VTT

1.25V

74LVT16245

FLASH

+12V

74LVC04

TSB41AB1

V33PHY

L2146

IOVDD

A33VDD

SAA7120

VDDA

VDDD

3.3VA

5VD

3.3VA

3.3V

3V3

2.5V

1.8V

+12V

3V3

E5_2V52.5V

E5_5VD5VD

2.5V

74LVC08

74LVC541

74HCT125

5VD

NJM2274

MC33202

DMN8602

74LVT273

74LVC245

74LVC32

1.8V

A18VDD

DVDD

MC33202

CS4351

VA_H

CS5340

24LC168

3-76

4. AUDIO IN/ OUT BLOCK DIAGRAM

VCR Board

A2_L_IN

A_L_IN

A2_R_IN

A_R_IN

VCR Board

A2_L_IN

A2_R_IN

OP AMP

(MC33202)

ADC_L

ADC_R ADC

(CS5340)

MCLK

SCLK

LRCK

SDOUT

AI_MCLK0

AI_SCLK

AI_FSYNC

AI_D0

DAC

(CS4351)

MCLK

SCLK

LRCK

SDIN

AO_MCLK0

AO_SCLK

AO_FSYNC

AO_D0

SCL

SDA

/RST_AUDIO

SCL

SDA

A_L_OUT

A_R_OUT

AV_RST1

Front Jack

DMN8602

OP AMP

(MC33202)

DAC_L

DAC_R

3-773-77

5. CPU & CONTROL REGISTER BLOCK DIAGRAM

DMN8602

HD[0:15]

E5_MA[1:5,22:26]

HD[0:15]

74LVT16373

BD[0:15]

BA[6:21]

E5_ALE

[1:5,22] BA[1:5,22]

GND

BA[1:22]

CS0

E5_WEL

E5_OE

/RST_VDEC

/RST_VENC

/RST_ PHY

/RST_AUDIO

Flash

4(8)MByte

Memory

Card

HD[0:15]

GPIO1

GPIO4 MEMC_RST

Ethernet

LAN91C111

BA[1:17]

BD[0:15]

/SMSC_CS

74LVT16245

HD[0:15]

BD[0:15]

/E5_OEL

74LVC32

74LVC04

BA[20:21]

BA21

/BA[20:21]

MEM_CON_SIG

LAN_CS

/CS2

SMSC_IRQ

GPIO2

E5_RST

/RST_SMS

3-783-78

6. VIDEO IN/ OUT BLOCK DIAGRAM

VCR Board

V_VCR_IN

V2_IN

VI_CLK0

VI_VSYNC0

VI_D[9:0]

VI_CLK0

VI_VSYNC0

VI_D[9:0]

GPIO

DMN 8602

Y_IN

C_IN YC MIX

(NJM2274)

V2_MIX_OUT MIX_OUT

VDEC

(L21146)

14.3MHz

/RST_VDEC

VO_D[7:0]

VO_CLK

VENC

(SAA7120)

SCL

SDA

/RST_VENC

VO_D[7:0]

VO_CLK

CVBS

G/Y

R/Pr

B/Pb

Y_OUT

C_OUT

CVBS_OUT

G_Y_OUT

R_Pr_OUT

B_Pb_OUT

Front Jack

3-79

7. DV 1394 IN/OUT BLOCK DIAGRAM

Front Jack

DMN 8602

DV 1394

(TSB41AB1 )

TPA1+-/TPB1+1

PHY_DATA[7:0]

PHY_CTL[1:0]

PHY_LREQ

PHY_LPS

PHY_LINK_ON

PHY_CLK

GPIO

/RST_PHY

3-80

8. MEMORY CARD IN/ OUT BLOCK DIAGRAM

PD[15:0]

9_IN_2

HD[15:0]

BUS

BUFFER

IC6901~

IC6903

74LVC32

IC6904

HD[15:0]

PA[2:0] BA[18:16] E5_ALE

GPIOExt

OE/WE/RST

MEMC_OE/WE/RST

DR/DW/RST

READY IO_READY WAIT /WAIT

BA[21:20]

CS2 /CS2

/BA[21:20]

ATA_CON_SIG

DMN8602

Host IF

Blo ck

Header H601

3-81 3-82

CIRCUIT DIAGRAMS

1. BGA 308P CIRCUIT DIAGRAM

A B C D E F G H I J K L M N O P Q R ST

3-83 3-84

A B C D E F G H I J K L M N O P Q R ST

2. DDR & B TO B CONNECTOR CIRCUIT DIAGRAM

3-85 3-86

A B C D E F G H I J K L M N O P Q R ST

3. POWER, FLASH, CONNECTOR CIRCUIT DIAGRAM

A B C D E F G H I J K L M N O P Q R ST

3-87 3-88

4. RST, CONTROL/STATUS_REG., ATAPI, HOST_CPLD, LATCH CIRCUIT DIAGRAM

3-89 3-90

A B C D E F G H I J K L M N O P Q R ST

5. VIDEO_IN, VIDEO_OUT CIRCUIT DIAGRAM

A B C D E F G H I J K L M N O P Q R ST

3-91 3-92

6. DV1394, HDMI CIRCUIT DIAGRAM

3-93 3-94

A B C D E F G H I J K L M N O P Q R ST

7. AUDIO IN/OUT CIRCUIT DIAGRAM

3-95 3-96

• WAVEFORMS

X101

13.5MHz

IC5101

PIN42

SDA

IC502

PIN29

SDA

IC502

PIN40

VI_CLK

IC502

PIN74

14.318MHz

PN304

PIN5

CVBS_OUT

PN304

PIN9

Y_OUT

PN304

PIN11

C_OUT

PN304

PIN17

R_Pr_OUT

PN304

PIN13

G_Y_OUT

PN304

PIN15

B_Pb_OUT

IC5101

PIN4

VO_CLK

PN303

PIN1

IEC958

IC802

PIN4

ADAC_MCLK

IC802

PIN2

ADAC_SCLK

IC802

PIN3

ADAC_LRCK

IC804

PIN4

ADC_SDATA(AI_D0)

IC802

PIN1

DAC_SDATA(AO_D0)

IC502

PIN53

VI_D1

PN7401

PIN 12

VDR_CLK

PN7401

PIN 13

VDR_DIN

PN7401

PIN 14

VDR_DOUT

PN7401

PIN 15

VDR_ENB

3-97 3-98

EE PB REC

MODE

PIN NO.

IC1201

IC302

IC402

IC405

16 0.19 0.19 0.19

17 0.19 0.19 0.19

18 3.29 3.29 3.29

19 0.19 0.19 0.19

20 0 0.19 0.19

21 0 0 0

22 0.19 0.19 0.19

23 0 0.19 0.19

24 3.28 3.29 3.29

25 3.29 3.29 3.29

26 0 0 0

27 0 0 0

28 0 0 0

29 0 0 0

30 0 0 0

31 3.29 3.29 3.29

32 0 0 0

33 0 0 0

34 0 0 0

35 0 0 0

36 0 0 0

37 0 0 0

38 0 0 0

39 0 0 0

40 0 0 0

41 0 0 0

42 3.29 3.28 3.29

43 0 0 0

44 0 0 0

45 0 0 0

46 0 2.92 0

47 0 2.92 0

48 3.29 3.29 3.29

10 0 0

2 0 0.04 0.04

3 0 0.04 0.04

40 0 0

5 0 3.29 3.29

6 0 3.29 3.29

7 3.14 3.29 3.29

8 0 0.04 0.04

9 0 0.04 0.04

10 0 0 0

11 0 0.04 0.04

12 0 0.04 0.04

13 0 0.04 0.04

14 0 0.04 0.04

15 0 0 0

16 0 0.04 0.04

17 0 0.04 0.04

18 0 3.29 3.29

19 0 0.04 0.04

20 0 0.04 0.04

21 0 0 0

EE PB REC

MODE

PIN NO.

IC406

22 0 0.04 0.04

23 0 3.29 3.29

24 0 0 0

25 0 0.01 0.01

26 0 0 0

270 0 0

28 0 0 0

29 0 0 0

30 0 0 0

31 0 3.29 3.29

32 0 0 0

33 0 0 0

34 0 0 0

35 0 0 0

36 0 0 0

37 0 0 0

38 0 0 0

39 0 0 0

40 0 0 0

41 0 0 0

42 3.16 3.29 3.29

43 0 0 0

44 0 0 0

45 0 0 0

46 0 0 0

47 0 0 0

48 0 0 0.01

1 0 0.001 0.001

2 0 0.002 0.004

30 0 0

4 3.22 3.256 3.255

5 3.22 3.256 3.255

60 0 0

7 0 0.002 0.002

8 0 0.001 0.002

9 0 0.001 0.002

10 0 0 0

11 1.78v 1.854 1.851

12 1.78 1.854 1.851

13 0 0 0

14 1.78 1.854 1.851

15 0 0 0

16 0 0.002 0.002

17 0 0.001 0

18 0 0.002 0.002

19 0 0 0

20 3.22 3.255 3.255

21 3.22 3.255 3.255

22 0 0 0

23 1.08 0.17 0.17

24 0. 0 0

25 1.78 1.852 1.848

26 0 0 0

27 0 0 0

EE PB REC

MODE

PIN NO.

IC502

28 3.24 3.254 3.253

29 3.22 3.255 3.25

30 0 0.954 0.978

31 1.7 1.855 1.852

32 0 0 0

33 0 0 0

34 3.22 3.254 3.252

35 0 1.029 0.964

36 0 1.029 0.522

37 0 0 0

38 3.24 3.252 3.252

39 0 0 0

40 2.54 1.566 1.566

41 1.78 1.855 1.854

42 90m 0 0

43 3.08 1.642 1.642

44 2.88 1.643 0.199

45 2.88 0.399 0.405

46 2.92 1.299 1.303

47 2.68 0.369 0.37

48 3.24 3.252 0.252

49 0 0 0

50 2.64 0.372 0.376

51 2.64 0.369 0.379

52 2.64 0.382 0.372

53 2.64 0.392 0.397

54 2.64 1.855 0.382

55 1.28 0.39 1.852

56 20m 1.855 0

57 3.24 0 0.866

58 0 1.059 0.7

59 0 1.056 0.759

60 0 1.05 0.716

61 3.24 3.253 3.252

62 0 0 0.099

63 0 0.944 1.004

64 0 0.965 0.669

65 0 0.879 0.93

66 0 0.943 1.034

67 1.78 1.856 1.852

68 0 0 0

69 0 0 0

70 3.18 1.022 1.054

71 0 1.53 1.53

72 0 2.942 2.942

73 0.8m 0.082 0.082

74 0.8m 0.082 0.861

75 0 0.792 0.672

76 1.78 1.852 1.848

77 0 0 0

78 1.78 1.853 1.849

79 0 0 0

80 0 0.001 0.003

1 1.32 1.322 1.325

EE PB REC

MODE

PIN NO.

2 0 0.004 0.006

3 32m 0.314 0.321

4 0 0.397 0.402

5 3.22 3.091 3.224

6 3.24 3.079 3.204

7 0 0.007 0.006

8 1.36 1.423 1.422

1 0 20mv 1.122

2 0 0.005 0.01

3 0 0.004 0.009

4 2.04 1.628 1.616

5 0 0.006 0.008

6 3.21 3.232 3.186

7 3.18 3.206 3.16

8 3.18 3.229 3.183

9 3.22 1.57 1.812

10 2.82 0.969 1.068

11 2.82 1.316 0.996

12 2.88 1.381 1.492

13 2.9 0.982 1.152

14 3.26 1.25 1.092

15 3.26 1.232 1.07

16 2.96 1.206 1.111

17 3.22 3.246 3.183

18 0 0.006 0.005

19 0 0.262 0.18

20 3.24 3.247 3.192

21 3.24 3.246 3.19

22 0 0.006 0.007

23 0 0.006 0.008

24 1.06 0.941 0.943

25 3.24 3.215 3.19

26 0 0.006 0.008

27 1.08 0.827 0.91

28 2.24 3.216 3.197

29 0 0.006 0.019

30 0 0.796 0.872

31 3.22 3.216 3.194

32 0 0.006 0.006

33 0 0.007 0.008

34 3.24 3.185 3.165

35 0 0.006 0.007

36 3.24 3.207 3.19

37 0 0.009 0.01

38 0 0.006 0.007

39 3.234 3.204 3.188

40 3.24 3.212 3.199

41 3.24 3.21 3.197

42 3.24 3.209 3.195

43 20m 0.009 0.011

44 20m 0.005 0.007

1 3.24 3.12 2.52

2 23.24 3.12 2.5

EE PB REC

MODE

PIN NO.

IC5101

IC802

IC501

3 3.24 3.18 1.68

4 2.24 2.82 1.64

5 3.16 3.14 1.65

6 0 0 1.64

7 3.24 3.24 1.64

8 3.22 3.24 0

9 3.22 3.24 4.94

10 3.22 3.24 4.94

11 3.24 3.24 3.25

12 1.22 1.12 3.25

13 12.2v 3.36 0.01

14 14.2v 1.2 3.25

15 4.28 0 2.42

16 0 14.2 2.49

17 14.2v 12.1 2.41

18 4.34 4.34 2.41

19 14.2 12.2 2.48

20 3.21 3.22 4.95

21 0 0 0.01

22 4.79 4.78 4.79

23 4.91 4.91 4.91

24 2.52 2.51 2.51

25 2.42 2.41 2.41

26 2.42 2.41 2.41

27 2.52 2.52 2.51

28 4.89 4.88 4.89

IC601 EE NO Conn. REC

1 2.64 2.64 1.62

2 3.42 3.52 1.06

3 3.42 3.48 0.01

4 3.54 3.58 0.5

5 3.56 3.62 0.5

6 0 0 0.02

7 0 0 0.02

8 0 0 0.02

9 0 0 0.02

10 0 0 0.02

11 0 0 0.02

12 0 0 0

13 3.26 3.27 3.26

14 0 0 0

15 0 0 0

160 0 0

17 0 0 0

18 0 0 0

19 3.04 3.24 3.23

20 3.04 3.26 3.11

21 3.04 3.26 3.26

22 3.04 3.2 3.25

23 0 0 0

24 0 0 0

25 3.24 3.24 3.26

26 0 0 0

27 0 0 1.83

28 0 0 1.83

EE PB REC

MODE

PIN NO.

29 3.12v 3.08 1.81

30 3.12v 3.12v 1.81

31 3.12 3.08v 1.82

32 0 0 0

33 0 0 0

34 1.24 1.22 1.21

35 3.24 1.22 3.26

36 0 8 0

37 3.24 3.1 3.26

38 0 1.48 0

39 1.34 3.22 1.4

40 3.28 3.28 3.26

41 0 3.22 0

42 1.48 1.48v 1.49

43 1.48 1.48v 1.49

44 2.96 3.24 3.26

45 3.24 3.24 3.26

46 0 0 0

47 0 0 0

48 2.88 2.88 0

EE PB REC

MODE

PIN NO.

• CIRCUIT VOLTAGE CHART

10 0 0

20 0 0

3 1.02 1.02 1.23

4 1.02 1.01 1.23

5 2.37 2.48 2.47

6 2.34 2.48 2.47

7 2.34 2.48 2.47

8 1.08 1.22 1.22

10 0 0

2 3.14 3.29 3.27

3 4.88 4.96 4.96

40 0 0

50 0 0

6 4.88 0.01 0.01

70 0 0

8 4.94 3.97 3.97

9 3.22 2.64 2.64

10 0 0 0

11 4.88 4.2 4.2

12 4.96 4.3 4.3

13 0 0 0

14 4.84 4.97 4.97

1 3.14v 3.29 3.29

2 3.14v 3.32 3.32

3 3.14v 3.29 3.29

4 0.04 0.04 0

5 0 0.04 0

60 0 0

70 0 0

8 3.14 3.29 3.29

9 3.14 5.09 5.9

10 3.14 3.29 3.29

11 3.14 3.29 3.29

12 4.98 5.09 5.09

13 3.14 3.29 3.29

14 3.14 3.29 3.29

1 3.28 3.28 3.29

2 3.31 0.19 0.19

3 3.22 0.19 0.19

40 0 0

5 0.19 0.19 0.19

6 0.19 0.19 0.19

7 3.29 3.29 3.29

8 0.19 0.19 0.19

9 0.19 0.19 0.19

10 0 0 0

11 0.19 0.19 0.19

12 0.19 0.19 0.19

13 0.19 0.19 0.19

14 3.31 0.19 0.19

15 0 0 0

3-99 3-100

PRINTED CIRCUIT DIAGRAMS

1. VDR P.C.BOARD(TOP VIEW)

3-101 3-102

2. VDR P.C.BOARD (BOTTOM VIEW)

DECK

MECHANISM PARTS LOCATIONS

• Top View......................................................4-1

• Bottom View ...............................................4-1

DISASSEMBLY AND

ASSEMBLY OF DECK MECHANISM

01.Disassembly of Drum assembly ................4-2

02.Disassembly of Plate top disassembly..... 4-4

03.Holder Assembly CST ...............................4-4

04.Disassembly of Gear Assembly

Rack F/L....................................................4-4

05.Opener Door .............................................4-4

06.Arm Assembly F/L .....................................4-4

07.Lever Assembly S/W .................................4-4

08.Motor Assembly L/D ..................................4-5

09.Gear Wheel ...............................................4-5

10.Arm Assembly Cleaner..............................4-5

11. Head F/E ...................................................4-5

12.Base Assembly A/C Head .........................4-5

13.Brake Assembly T .....................................4-6

14.Arm Assembly Tension..............................4-6

15.Reel S / Reel T..........................................4-6

16.Base Assembly P4 ....................................4-7

17.Opener Lid ................................................4-7

18.Arm Assembly Pinch .................................4-7

19.Arm T/up ...................................................4-7

20.Supporter, Capstan ...................................4-8

21.Belt Capstan/Motor Capstan .....................4-8

22.Lever F/R ..................................................4-8

23.Clutch Assembly D37 ................................4-8

24.Gear Drive/Gear Cam ...............................4-9

25.Gear Sector...............................................4-9

26.Brake Assembly Capstan ..........................4-9

27.Plate Slider................................................4-9

28.Lever Tension............................................4-9

29.Lever Spring..............................................4-9

30. Lever Brake..............................................4-9

31.Gear Assembly P2/Gear Assembly P3 ...4-10

32.Base Assembly P2/Base Assembly P3 ...4-10

33.Base Loading ..........................................4-10

34.Base Tension ...........................................4-11

35.Arm Assembly Idler Jog ..........................4-11

DECK MECHANISM ADJUSTMENT

• Fixtures and tools for service ................4-12

1. Mechanism Assembly Mode Check ........4-13

2. Previous Preparation for

Deck Adjustment .....................................4-14

3. Torque Measuring ...................................4-14

4. Guide Roller Height Adjustment..............4-15

4-1. Prior Adjustment...............................4-15

4-2. Fine Adjustment ...............................4-15

5. Audio/Control (A/C) Head Adjustment......4-16

5-1. Prior Adjustment...............................4-16

5-2. Tape Path Check between Pinch

Roller and Take-up Guide ................4-17

5-3. Fine Adjustment

(Azimuth Adjustment).......................4-17

6. X-distance Adjustment ............................4-17

7. Adjustment after Drum Assembly

(Video Heads) .........................................4-18

8. Tachometer Adjustment of

Deck Assembly........................................4-18

8-1. Check of Audio, RF Normalization

Time (Locking Time) in Play after

CUE or REV.....................................4-18

8-2. Check of Tape Curl and

Jam Status .......................................4-18

PROTECTION, MAINTENANCE AND

CHECK OF VIDEO FUNCTION

1. Checking Points before Repair ...............4-19

2. Essential Check and Repair....................4-20

3. Regular Check and Repair......................4-20

4. Tools for Check and Repair.....................4-20

5. Maintenance Process..............................4-20

5-1. Removal of Foreign Materials..........4-20

5-2. Grease Application...........................4-21

TROUBLESHOOTING GUIDE

1. Deck Mechanism.....................................4-23

2. Front Loading Mechanism.......................4-26

EXPLODED VIEWS

1. Front Loading Mechanism Section...........4-28

2. Moving Mechanism Section(1) .................4-29

3. Moving Mechanism Section(2) .................4-30

SECTION 4 MECHANISM OF VCR PART(D-37)

CONTENTS

DECK MECHANISM PARTS LOCATIONS

4-1

• Top View

• Bottom View

1 Drum Assembly 3 screws A-1 T

2 Plate Top 2 hooks A-2 T

2 3 Holder Assembly CST 6 chasses A-2 T

2,3 4 Gear Assembly Rack F/L 1 hook A-2 T

2,3,4 5 Opener Door Chassis Hole A-2 T

2,3,4,5 6 Arm Assembly F/L Chassis Hole A-2 T

7 Lever Assembly S/W Chassis Hole, A-2 T

1 hook

8 Motor Assembly L/D 1 screw A-3 T

9 Gear Wheel 2 hooks A-3 T

10 Arm Assembly Cleaner Chassis Embossing A-3 T

11 Head F/E Chassis Embossing A-3 T

12 Base Assembly A/C Head 1 screw A-3 T

2,3 13 Brake Assembly T 1 hook A-4 T

2,3 14 Arm Assembly Tension 1 hook A-4 T

2,3,13,14 15 Reel S / Reel T Shaft A-4 T

16 Base Assembly P4 Chassis Embossing A-5 T

17 Opener Lid Chassis Embossing A-5 T

17 18 Arm Assembly Pinch Shaft A-5 T

17 19 Arm T/up 1 hook A-5 T

20 Supporter, capstan Chassis Hole A-6 B

17,18 21 Belt Capstan/Motor Capstan 3 screws A-6 B

22 Lever F/R Locking Tab A-6 B

21, 22 23 Clutch Assembly D37 Washer A-6 B

24 Gear Drive/Gear Cam Washer/Hook A-7 B

25 Gear Sector Hook A-7 B

21 26 Brake Assembly Capstan Chassis Hole A-7 B

21,22,23, 27 Plate Slider Chassis Guide A-7 B

24,2526

21,22,23, 28 Lever Tension 1 Hook A7 B

24,2526,27

21,22,23, 29 Lever Spring 1 Hook A-7 B

24,2526,27

21,22,23, 30 Lever Brake 1 Hook A-7 B

24,2526,27

25 31 Gear Assembly P2/ Bass A-8 B

Gear Assembly P3

2, 3, 14, 32 Base Assembly P2 6 Chasses A-8 B

25, 31 /Base Assembly P3

25, 31 33 Base Loading 3 Hooks A-8 B

2,3,14 34 Base Tension Chassis Embossing A-9 T

35 Arm Assembly Idler Jog Locking Tab A-9 T

Starting

No.

Procedure

Part Fixing Type

Ref.

Draw-

ings

Posi

tion

NOTE : When reassembling, perform the

procedure in the reverse order.

(1) When reassembling, confirm Mechanism and Mode

Switch Alignment Position

(2) When disassembling, the Parts in the "Starting No."

column should be removed first."

T:Top, B:Bottom

4-2

DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM

Cap, FPC

Drum Assembly

Flat Cable

(S1) (S1)

(S1)

Holder FPC

1. Disassembly of Drum Assembly

(Figure A-1)

1) Separate the flat cable from the Drum FPC and the

Capstan Motor.

2) Release 3 screws (S1) on the bottom side of the chassis,

and separate the drum assembly.

3) Release the hooks (H1, H2) and separate both the holder

FPC and the Cap FPC (disassemble if necessary).

Fig. A-1

Cautions in assembly of FPC

Holder FPC

Drum FPC

Cap FPC

Assembly shape seen in the reverse direction

DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM

4-3

(B)

(E)

(C)

Plate Top

Arm Assembly F/L

Gear Assembly Rack F/L

Opener Door

Holder Assembly CST

(B')

(H3)

(A) (B)

Lever Assembly S/W

(H4)

(E)

Fig. A-2

(Fig. A-2-1)

(Fig. A-2-2)

(Fig. A-2-5)

(Fig. A-2-6)

(Fig. A-2-3)

(Fig. A-2-4)

2. Disassembly of Plate Top (Fig. A-2-1)

1) Separate the right part while leaning back the (B) part of

the plate top toward the arrow direction.

2) Separate the left part while leaning back the (B’) part of

the plate top toward the arrow direction.

(Tool used: Tool such as (-) driver, auger, etc with point-

ed or flat end)

CAUTIONS

Assemble while pressing the (C), (C’) part after correspond-

ing them as in drawing.

3. Holder Assembly CST (Fig. A-2-2)

1) Firstly separate the left part from the groove on the (D)

part of chassis while moving the holder assembly CST

toward the arrow direction.

2) Separate the right part from each groove of chassis

CAUTIONS

Assemble by inserting the left part after firstly inserting the

(E) part of the holder assembly CST into the groove on the

(E’) part of chassis.

4. Disassembly of Gear Assembly

Rack F/L (Fig. A-2-3)

1) Separate the hook (H3) while leaning ahead the hook (3)

after moving the gear assembly rack F/L toward the arrow

(A) direction.

2) Separate the gear assembly rack F/L toward the arrow (B)

direction.

CAUTIONS

For the assembly, correspond the gear part of gear assem-

bly rack F/L to the gear drive.

5. Opener Door (Fig. A-2-4)

1) Separate the opener door ahead from the guide hole of

chassis while turning it clockwise.

6. Arm Assembly F/L (Fig. A-2-5)

1) Firstly separate the left part of the arm assembly F/L from

the groove of chassis while pushing the arm assembly F/L

toward the arrow direction.

2) Separate the right part from the groove of chassis.).

7. Lever Assembly S/W (Fig. A-2-6)

1) Separate the lever assembly S/W while pushing it toward

the arrow direction after removing the hook (4) on the left

side of chassis.

4-4

DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM

(B')

(C')

(C)

(B)

(D)

Holder Assembly CST Chassis

Chassis

(H4)

Gear Rack F/L

Gear Drive

DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM

4-5

8. Motor Assembly L/D (Fig. A-3-1)

1) Take the connector (C1) connected to the Capstan motor

PCB out.

2) Remove a screw (S4) of the chassis (S4) and step back-

ward, and disassemble it while holding it up.

9. Gear Wheel (Fig. A-3-2)

1) Release the hook (H5) of the gear wheel and disassemble

it upward.

10. Arm Assembly Cleaner (Fig. A-3-3)

1) Separate the (A) part of Fig. A-3-1 from the embossing of

chassis, and hold it up while turning it anti-clockwise.

11. Head F/E (Fig. A-3-4)

1) Separate the (A) part of the head F/E from the emboss-

ing of chassis, and hold it up while turning it anti-clock-

wise.

12. Base Assembly A/C Head (Fig. A-3-5)

1) Release a screw (S5) and disassemble while holding it up.

Arm Assembly Cleaner

Motor Assembly L/D

Gear Wheel

Base Assembly A/C Head

(S4)

(S5)

Head F/E

(A)

(C1)

(H5)

(A)

Fig. A-3

(Fig. A-3-3)

(Fig. A-3-5)

(Fig. A-3-4)

(Fig. A-3-2)

(Fig. A-3-1)

4-6

DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM

Brake Assembly T

Reel T

Spring Tension

Arm Assembly Tension

Spring Tension

Reel S

(H7)

(H8)

(H6)

Fig. A-4

13. Brake Assembly T (Fig. A-4-1)

1) Release the spring tension from the lever spring hook

(H6).

2) Disassemble the brake assembly T while holding it

upward.

14. Arm Assembly Tension (Fig. A-4-2)

1) Release the spring tension the hook (H7) from the arm

assembly tension.

2) After releasing the hook (H8) of the base tension, sepa-

rate it while holding it up.

CAUTIONS

Spring used for both brake assembly T and arm assembly

tension is used (2EA used).

15. Reel S/Reel T (Fig. A-4-3)

1) Disassemble the reel S/ reel T while holding it up (com-

parison between Reel S and Reel T)

Reel S Reel T

(Fig. A-4-3)

(Fig. A-4-2)

(Fig. A-4-1)

(Fig. A-4-3)

DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM

4-7

Opener Lid

Arm Assembly Pinch

Base Assembly P4

Arm T/up

(A)

(B)

(C)

Chassis

(C)

(H9)

Fig. A-5

16. Base Assembly P4 (Fig. A-5-1)

1) Release the (A) part of the base assembly P4 from the

embossing of chassis.

2) Hold the base assembly P4 up while turning it anti-clock-

wise.

17. Opener Lid (Fig. A-5-2)

1) Release the (B) part of the opener lid from the embossing

of chassis.

2) Disassemble the opener lid upward while turning it anti-

clockwise.

18. Arm Assembly Pinch (Fig. A-5-3)

1) Hold the arm assembly pinch up.

19. Arm T/up (Fig. A-5-4)

1) Turn the arm T/up to release the anchor jaw (H9) part of

chassis and then hold it upward.

CAUTIONS

For the assembly, check the (C) part of the arm assembly

pinch is assembled as in drawing.

- REVERSE THE MECHANISM.

(Fig. A-5-2)

(Fig. A-5-1)

(Fig. A-5-3)

(Fig. A-5-4)

4-8

DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM

Chassis

(S6)

Belt Capstan

Motor Capstan

Washer(W1)

Lever F/R

Clutch Assembly D37

(L1) (L1)

Suppoter Capstan

Fig. A-6

20. Supporter, Capstan (Fig. A-6-1)

1) Turn the supporter and Capstan by 90 deg. clockwise

with a driver for disassembly.

21. Belt Capstan (Fig. A-6-2) /

Motor Capstan (Fig. A-6-3)

1) Separate the belt Capstan.

2) Undo 3 screws (S6) on the bottom side of chassis and dis-

assemble it upward.

22. Lever F/R (Fig. A-6-4)

1) Release the locking tab (L1) and then disassemble it

upward.

23. Clutch Assembly D37 (Fig. A-6-5)

1) Remove the washer (W1) and then disassemble it

upward.

(Fig. A-6-1)

(Fig. A-6-2)

(Fig. A-6-3)

(Fig. A-6-4)

(Fig. A-6-5)

DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM

4-9

Gear Drive

Washer (W2)

Gear Cam

Plate Slider

Lever Tension

Lever spring

Base Loading

Gear Sector

(B)

(A)

(H10)

(W2)

(L2)

(H11)

Chassis

Gear Cam Hole(C)

Gear Cam Hole(B)

Gear Drive Hole(A)

Brake Assembly Capstan

Lever Brack

Fig. A-7

24. Gear Drive (Fig. A-7-1)/

Gear Cam (Fig. A-7-2)

1) Remove the washer (W2) and then disassemble the

gear drive.

2) Release the hook (H10) of the gear cam and then disas-

semble it upward.

CAUTIONS

For the assembly, adjust both the gear driver hole (A) and

the gear cam hole (B) straightly and then correspond the

gear cam hole (C) to the chassis hole.

25. Gear Sector (Fig. A-7-3)

1) Release the hook (H11) of the gear sector and then hold

the gear sector upward.

26. Brake Assembly Capstan (Fig. A-7-4)

1) Release the locking tab (L2) on the bottom side of the

plate slider and then disassemble it upward.

27. Plate Slider (Fig. A-7-5)

1) Disassemble the plate slider while holding it up.

28. Lever Tension (Fig. A-7-6)

1) Release the lever tension from the guide (A) of chassis

while turning it anti-clockwise.

2) Disassemble the lever tension while holding it up.

29. Lever Spring (Fig. A-7-7)

1) Release the (B) part of the lever spring from the guide

(A) of chassis while turning it anti-clockwise.

2) Disassemble the lever tension while holding it up.

30. Lever Brake (Fig. A-7-8)

1) Disassemble the lever brake while holding it up.

(Fig. A-7-4) (Fig. A-7-5)

(Fig. A-7-8) (Fig. A-7-7)

(Fig. A-7-6)

(Fig. A-7-1)

(Fig. A-7-2) (Fig. A-7-3)

4-10

DECK MECHANISM DISASSEMBLY

Gear Assembly P3

Gear Assembly P2

Base Assembly P2

Base Assembly P3

(A)

(B)

(H14)

(H12) (H13)

Chassis

Gear assembly P2 Hole

Gear assembly P3 Hole

Lever Tension Boss

Plate slider Hole(B)

Base Loading

Fig. A-8

31. Gear Assembly P2 (Fig. A-8-1)/

Gear Assembly P3 (Fig. A-8-2)

1) Hold the gear assembly P2 upward.

2) Hold the gear assembly P3 upward.

CAUTIONS

For the assembly, check the holes of both the gear assem-

bly P2 and the P3 are adjusted straightly, and then corre-

spond the gear section groove (A) to the plate slider hole (B).

32. Base Assembly P2 (Fig. A-8-3)/

Base Assembly P3 (Fig. A-8-4)

1) Disassemble the base assembly P2 downward while mov-

ing it toward the arrow (A) direction along with the guide

hole of chassis.

2) Disassemble the base assembly P2 downward while mov-

ing it toward the arrow (B) direction along with the guide

hole of chassis.

33. Base Loading (Fig. A-8-5)

1) Release 3 hooks (H12, 13, 14) of the base loading, and

then disassemble them upward.

- Reverse the mechanism.

(Fig. A-8-1)

(Fig. A-8-2)

(Fig. A-8-5)

(Fig. A-8-4)

(Fig. A-8-3)

DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM

4-11

(A)

(B) (C)

Arm Assembly Idler Jog

Base Tension

Chassis

(D)

Fig. A-9

34. Base Tension (Fig. A-9-1)

1) Release the (A) part of the base tension from the

embossing of chassis.

2) Hold the base tension upward while turning it anti-clock-

wise.

35. Arm assembly Idler Jog (Fig. A-9-2)

1) Push both (B), (C) parts in Fig. A-9-2 toward the arrow

direction.

2) Disassemble the arm assembly idler upward.

CAUTIONS

Take care to ensure that the (D) part in the drawing is not

hung to chassis in disassembly.

(Fig. A-9-1)

(Fig. A-9-2)

DECK MECHANISM ADJUSTMENT

4-12

• Fixtures and Tools for Service

1. Cassette Torque Meter

SRK-VHT-303(Not SVC part)

Part No:D00-D006

4. Torque gauge adaptor

Part No:D09-R001

5. Post height adjusting driver

Part No:DTL-0005

6. + Type driver (ø5)

2. Alignment tape

Part No NTSC:DTN-0001

PAL:DTN-0002

3. Torque gauge

600g.Cm ATG

Part No:D00-D002

SRK

VIDEO

CASSETTE

TORQUE

METER

VHT-303

-S

-T

300

250

200

150

300

250

200

150

100

Purpose of adjustment : To make tools normally operate by positioning tools accurately.

DECK MECHANISM ADJUSTMENT

4-13

1) Turn the VCR on and take the tape out by pressing the

eject button.

2) Separate both top cover and plate top, and check both

the hole (A) of gear cam and the hole (A’) of chassis cor-

respond (Fig. C-2).

3) If it is done as in the paragraph 2): Turn the gear cam as

in No.2) after mantling the motor assembly L/D.

4) Undo the screw fixing the deck and the main frame, and

separate the deck assembly. Check both the hole (A) of

gear cam and the hole (A’) of chassis correspond (Fig.

C-1).

5) Check the mode S/W on the main P.C. board locates at

a proper position as in (B) of the Fig. (C-1).

6) Connect the deck to the main P.C. board and perform all

types of test.

Gear Cam

Gear Drive

(C)

Mode S/W

(B)

Motor Assembly L/D

Gear Cam

Chassis Hole Gear Cam Hole

(A)

(A')

Fixtures and tools used VCR (VCP) status Checking Position

• Blank Tape (empty tape) • Eject Mode

(with cassette withdrawn) • Mechanism and Mode Switch

Fig. C-1

Fig. C-2

CHECK DIAGRAM

BOTTOM VIEW

TOP VIEW

Correspondence of the gear cam hole (O)

and the gear drive hole (O)

1. Mechanism Assembly Mode Check

Purpose of Measuring : To measure and check the reel torque on the take-up part and the

supply part that performs basic operation of the VCR (VCP) for

smoothly forwarding the tape.

Measure and check followings when the tape is not smoothly

wound or the tape velocity is abnormally proceeded:

4-14

• Torque Gauge

(600 g.cm ATG)

• Torque Gauge Adaptor

• Cassette Torque Meter

SRK-VHT-303

• Play (FF) or Review

(REW) Mode

• Try to operate the VCR (VCP) per mode with the

tape not inserted (See ‘2. Prior Preparation for

Deck Adjustment).

• Measure after adhering and fixing the torque

gauge adaptor to the torque gauge (Fig. C-3-1)

• Read scale of the supply or take-up part of the

cassette torque meter (Fig. C-3-2).

DECK MECHANISM ADJUSTMENT

1) Take the power cord from the consent.

2) Separate the top cover and the plate assembly top.

3) Insert the power cord into again.

4) Turn the VCR (VCP) on and load the cassette while push-

ing the lever stopper of the holder assembly CST back-

ward. In this case, clog both holes on the housing

rail part of chassis to prevent detection of the end sensor.

If doing so, proceeding to the stop mode is done. In this

status, input signals of all modes can be received.

However, operation of the Rewind and the Review is

impossible since the take-up reel remains at stop status

and so cannot detect the reel pulse (however, possible for

several seconds).

2. Previous Preparation for Deck Adjustment

(Preparation to load the VCR (VCP) with cassette tape not inserted)

3. Torque Measuring

NOTE

Adhere the torque gauge adaptor to the torque gauge for measuring the value.

SRK

VIDEO

CASSETTE

TORQUE

METER

VHT-303

-S

-T

300

250

200

150

300

250

200

150

100

Fig. C-3-2Fig. C-3-1

Torque Gauge

Adaptor

Reel Table

Item

Fast forward Torque

Rewind Torque

Play Take-Up Torque

Review Torque

Fast Forward

Rewind

Play

Review

Torque Gauge

VHT-303

Take-Up Reel

Supply Reel

Take-Up Reel

Supply Reel

More than 400g°cm

40~100g°cm

120~210g°cm

Mode Instruments Reel Measured Measuring Value

• Cassette Torque Meter (SRK-VHT-303)• Torque Gauge (600g.cm ATG)

VCR (VCP) status Measuring methodFixtures and tools used

Adjustment Procedure

1) Travel the tape and check the bottom surface of the

tape travels along with the guide line of the lower drum.

2) If the tape travels toward the lower part of guide line on

the lower drum, turn the guide roller height adjusting

screw to the left

3) If it travels to the upper part, turn it to the right.

4) Adjust the height of the guide roller to ensure that the

tape is guided on the guide line of the lower drum at the

inlet/outlet of the drum. (Fig. C-4-1)

DECK MECHANISM ADJUSTMENT

4-15

Fig. C-4-1

GUIDE ROLLER

HEIGHT

ADJUSTMENT SCREW

ADJUSTMENT DIAGRAM

Purpose of adjustment : To ensure that the bottom surface of the tape can travel along with

the tape lead line of the lower drum by constantly and adjusting

and maintaining the height of the tape.

4. Guide Roller Height Adjustment

Fixtures and tools used VCR (VCP) status Adjustment position

• Post Height Adjusting

Driver • Play or Review Mode • The guide roller height adjusting screw on the

supply guide roller and the take-up guide roller

4-1. Prior Adjustment

1) Play the standard test tape after connecting the probe of

oscilloscope to the RF envelope output point and the

head switching output point.

2) Tracking control (playback) : Locate it at the center

(Set the RF output to the maximum value via the track-

ing control when such adjustment is completed after the

drum assembly is replaced.)

3) Height adjusting screw: Flatten the RF waveform.

(Fig. C-4-2)

4) Move the tracking control (playback) to the right/left.

(Fig. C-4-3)

5) Check the start and the end of the RF output reduction

width are constant.

CAUTIONS

There must exist no crumpling and folding of the tape due

to excess adjustment or insufficient adjustment.

Fig. C-4-2

P2 POST ADJUSTMENT

P3 POST ADJUSTMENT

CH-1 CH-2

RF ENVELOPE OUTPUT POINT

HEAD RF SWITCHING OUTPUT POINT

Flatten the waveform by

lightly turning the

guide roller height adjust-

ment screw.

When turning the tracking

control to both sides.

OSCILLOSCOPE

When the tracking control

locates at the center.

Waveform

Connection Diagram

Fixtures and tools used Measuring tools and

connection position VCR (VCP) status Adjustment position

• Oscilloscope

• Standard test tape

• Post height adjusting

driver

• CH-1: PB RF Envelope

• CH-2: NTSC : SW 30Hz

PAL : SW 25Hz

• Head switching output

point

• RF Envelope output

point

• Play the standard test

tape.

• Guide roller height

adjusting screw

4-2. Fine Adjustment

4-16

DECK MECHANISM ADJUSTMENT

8.3

Fig. C-5-1

A/C Head Base

Fig. C-5-2

Height Adjustment

Screw(B)

Tilt Adjustment

Screw(C)

Azimuth

Adjustment

Screw(A)

X-Value Adjustment

Hole

Fig. C-5-3

A/C Head Tape

Tape

0.2~0.25mm

A/C Head Assembly

Purpose of adjustment : To ensure that audio and control signals can be recorded and

played according to the contract tract by constantly maintaining

distance between tape and head, and tape tension between the P3

post and the P4 post.

5. Audio/Control (A/C) Head Adjustment

Adjustment Procedure/Adjustment Diagrams

1) Basically use the A/C head assembly adjusted as in

SPEC.

2) Check there is crumpling and folding of the tape around

the A/C head. If it is, Turn and adjust the tilt adjusting

screw to ensure that the tape corresponds to the bottom

guide of the P4, and recheck the tape path after pro-

ceeding play for 4-5 seconds.

3) Where the tape bottom is not equal to Fig. C-5-3, Adjust

the height by using the height adjusting screw (B) and

then readjust it by using the tilt adjusting screw (C).

CAUTIONS

Always check the height of the A/C head since most ideal

height of A/C head can be obtained when the bottom part

of the tape is away 0.2 ~ 0.25mm from the bottom part of

the A/C head.

Fixtures and tools used VCR (VCP) status Adjustment position

• Blank Tape

(Empty Tape)

• Driver (+) Type ø 5

• Play the blank tape

(empty tape).

• Tilt adjusting screw (C)

• Height adjusting screw (B)

• Azimuth adjusting screw (A)

5-1. Prior Adjustment (performed only when no audio output appears in play of the standard test tape)

Fixed Screw

Adjustment Procedure

1) After releasing the auto tracking, lightly turn the fixing

screw. Turn the (+) type driver (Ø 3 ~ Ø 4) on the X-dis-

tance adjusting hole to the right or left. Adjust the RF

envelope level to the maximum point and then fix the fix-

ing screws.

2) For the 31mm head, adjust it with the SP tape recorded

in the width of 31mm since the head travels on the tape

track only for SP with the width of 58mm.

DECK MECHANISM ADJUSTMENT

4-17

5-2. Tape Path Check between Pinch Roller and

Take up Guide (Check in the Rev Mode)

1) Check the tape pass status between the pinch roller and

the take-up guide.(Check there is crumpling of the tape

pass and folding of the take-up guide.)

1) (1) When holding of the take-up guide bottom occurs

Turn the tilt adjusting screw (C) clockwise and travel it

stably to ensure there is no crumbling or folding of the

tape.

1) (2) When holding of the take-up guide top occurs

Turn the tilt adjusting screw (C) anti-clockwise and

travel it stably to ensure there is no crumbling or fold-

ing of the tape.

1) 2) Check there is folding of the tape at the bottom or top

of the take-up guide in cutting-off the REV mode

CAUTIONS

If the RF waveform is changed after adjusting the A/C head,

perform fine adjustment to ensure the RF waveform is flat-

tened.

Adjustment Procedure

1) Connect the probe of Oscilloscope to the audio output

jack.

2) Ensure that Audio 1KHz, 7KHz output is flattened at the

maximization point by adjusting the Azimuth adjusting

screw (A). Fig. C-5-4

Fixtures and tools used Connection position VCR (VCP) status Adjustment position

• Oscilloscope

• Standard test tape

(only for SP)

• Driver (+) Type Ø 4

• Audio Output Jack • Play the standard test

• Tape, 1KHz, 7KHz.

• Azimuth Adjusting

Screw (A)

• Height Adjusting Screw

(B)

5-3. Fine Adjustment (Azimuth Adjustment)

1KHz

A: Maximum

7KHz

B: Minimum

Fig. C-6

Fixtures and tools used Connection position VCR (VCP) status Adjustment position

• Oscilloscope

• Standard test tape

(only for SP)

• Driver (+) Type Ø 4

• CH-1: PB RF Envelope

• CH-2: NTSC ; SW 30Hz

PAL:SW 25Hz

• Head switching output

point

• RF Envelope output

point

• Play the standard test

tape.

6. X-distance Adjustment

Left

X-distance Adjusting Hole

Tilt Adjusting Screw (C)

Fixing Screw

Height Adjusting

Screw (B)

Right

Grove of Base A/C

Purpose of adjustment : To maintain compatibility with other VCR (VCP).

RF ENVELOPE OUTPUT POINT

HEAD RF SWITCHING OUTPUT POINT

OSCILLOSCOPE

Connection Diagram

CH-2CH-1

Azimuth

Adjustment

Screw(A)

Checking/Adjustment Procedure

1) Play the blank tape (empty tape) and check whether the

guide roller crumbles or wrinkles the tape and adjust it if

necessary.

2) Check that the RF envelope output waveform is flat, and

adjust the height of the guide roller while playing the

standard test tape.

3) Adjust the switching point.

4) Check the RF envelope output is the maximum when

the tracking control locates at the center. If not maxi-

mum, set up to ensure that RF envelope output

becomes the maximum by turning the (+) type driver (Ø

3 ~ Ø 4) on the base A/C groove.

4-18

DECK MECHANISM ADJUSTMENT

8-2. Check of Tape Curl and Jam Status

Fixtures and tools used Connection position VCR (VCP) status Adjustment position

• Oscilloscope

• Standard test tape

(only for SP)

• Post Height Adjusting

Driver

• Driver (+) Type Ø 5

• CH-1: PB RF Envelope

• CH-2: NTSC : SW 30Hz

PAL:SW 25Hz

• Head switching output

point

• RF Envelope output

point

• Play the blank tape.

• Play the standard test

tape.

• Fine adjustment of

guide roller

• Switching Point

• Tracking Preset

• X-distance

7. Adjustment after Drum Assembly (Video Heads)

Purpose of adjustment : To adjust and stabilize the height change, X-distance change, etc

depending on the guide roller after assembling the drum.

RF ENVELOPE OUTPUT POINT

V2V1V1

V1/V MAX = 0.7

V1/V MAX = 0.8

RF ENVELOPE OUTPUT

HEAD RF SWITCHING OUTPUT POINT

OSCILLOSCOPE

Connection Diagram

Waveform

CH-2CH-1

Checking Procedure

1) Check that locking time of the RF and Audio waveform is

fallen within the measuring standard in conversion of the

play mode from the CUE or the REV mode.

2) Readjust the paragraph 5 and 6 if it deviates from the

standard.

Fixtures and tools used Measuring standard Connection position VCR (VCP) status

• Oscilloscope

• 6H 3KHz Color Bar

Standard Test tape

• Stop Watch

• RF Locking Time: Within

5 seconds

• Audio Locking Time :

Within 10 seconds

• CH-1: PB RF Envelope

• CH-2: Audio output

• RF Envelope output

point

• Audio output jack

• Play the 6H 3KHz

Color Bar Standard

Test tape.

8. Check of Traveling Device after Deck Assembly

8-1. Audio, RF Normalization Time (Locking Time) Check in Play after CUE or REV

Checking Procedure

1) Check there is no abnormality of every traveling post

status.

2) There must be no abnormal operation of the counter in

occurrence of folding of the bottom tape. There must be

not abnormality of audio signal in damage of the top tape.

3) If there is abnormality, readjust the adjustment para-

graph 4 and 5.

Fixtures and tools used Fixtures and tools used Fixtures and tools used

• T-160 Tape

• T-120 Tape

• There must be no jam or curl at the

first, middle and end position of tape.

• Travel the tape at the position

of its first and end.

PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION

4-19

(3) F/E Head

(5) Drum Assembly

(Video Head)

(4) Base Assembly P2

(2) Tension Post

(1) Supply Reel

(6) Base Assembly

Phenomena Replace-

ment

Checking Points and

Cause

Color beat Pollution of Full-Erase Head o

S/N, Color Faded Pollution of Video Head o

Horizontal, Vertical Jitte o

CAUTIONS

If operation of the position with (O) mark is abnormal even

after removing cause, replace it with substitute product since

it shows damage or wearing.

(7) A/C Head

(8) P4 Post

(10) Pinch Roller

(11) Take-up Guide

Post

(9) Capstan Shaft

(12) Take-up Reel

* No. (1) ~ (12) shows sequence that the tape moves from the supply reel to the take-up reel.)

Fig. C-9-1 TOP VIEW

Fig. C-9-2 BOTTOM VIEW

F/E Head

Video Head

A/C Head

Pinch Roller

Belt Capston

Clutch

Assembly A37

Fig. C-9-3 Tape Transport System

Pollution of Video Head or

Tape Transport System

Poor Sound, Low Sound o

Pollution of Audio/Control

Head

Pollution of Pinch Roller or

Belt Capstan Belt

No tape wound or tape

wound loosely.

FF or REW impossible,

or slow turning

Deterioration of Clutch

Assembly D37 Torque

Pollution of Drum and

Traveling Device

Tape loosely wound in

REV or Unloading

Fig. C-9-3

1. Checking Points prior to Repair

Following abnormal phenomena may be repaired by

removal of foreign materials and oil supply. Check oiling is

required at the checking set or cleaning status is complete.

Determine that necessity of checking and repair the set

exists after checking the using period of the set together

with the user. In this case, followings must be checked:

PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION

4-20

2. Essential Check and Repair

Recording density of the video is far higher than the audio.

Therefore video parts are very precise so as to allow only

error of 1/1000mm or so in order to maintain compatibility

with other videos.

If one of these parts is polluted or old, same phenomena will

appear as they are damaged.

To maintain clear screen, regular check, replacement of old

and damaged parts and oil supply, etc are essential.

3. Regular Check and Repair

Check and repair schedule is not constant since they vary

depending on method that the consumer uses video and

environment where the video is installed at.

However, for the video used by common household, good

screen will be maintained if regular check and repair per

1,000 hour is performed. The following chart shows relation-

ship between using time and checking time:

4. Tools for Check and Repair

(1) Grease: Floil G-3114 (KANTO) or equivalent grease

(Green)

(2) Grease: Kanto G-754, PL-433 (Yellow)

(3) Alcohol (Isopropyl Alcohol)

(4) Cleaning Patch (cloth)

5. Maintenance Process

5-1) Removal of Foreign Material

(1) Removal of foreign material from video head (Fig. C-9-4)

Firstly try to use a cleaning tape.

(1) Use a cleaning patch if foreign materials are not removed

with the cleaning tape due to severe dirty of the head.

Soak the cleaning patch in alcohol and put it to the head

tip. Smoothly turn the drum (turning cylinder) to the right

or left (In this case, the cleaning patch must not be

moved vertically).

(1) After completely drying the head, test the traveling status

of the tape.

(1) If alcohol (Isopropyl Alcohol) remains at the video head,

the tape may be damaged when this solution touches

with the head surface.

Never use a cloth bar (commercial sale)

(2) Wipe the tape transport system and the drive system

with the cleaning patch soaked in alcohol (Isopropyl

Alcohol) when removing foreign materials from them.

1) The part touched with the traveling tape is called as

tape transport system. The drive system consists of

parts to travel the tape.

(2) 2) Care must be exercised so that unreasonable force

to change the pattern will be applied to the tape trans-

port system during removal of foreign materials.

About

1 year

One hour

Table 1

Two hours

Three hours

Time

Requiring

Checking

Average

hours used

per day

About

18 months

About

3 years

Fig. C-9-4

Drum

(Turning Cylinder)

Head Tip

Soak alcohol

(Isopropyl Alcohol).

Cleaning Patch

(Cloth)

Smoothly turn the drum (turning

cylinder) touching the soft surface

to the head tip surface.

PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION

4-21

5-2) Grease Applications

(1) Grease Application Method

Apply grease by using a cloth swab or brush. Care must

be exercised so that excess quantity should not be

used. If the excessive quantity is applied, wipe it with

the gauze soaked in alcohol (Isopropyl Alcohol).

NOTE: POSITION OF GREASE APPLICATION

(2) Regular Grease Application

Apply grease to the designated application position

every 500 hour.

(1) Inner Side Surface and Top

Surface of Loading Path

(2) Stable Adhesion Part of Base

P2, P3

(3) Arm Pinch Shaft

(4) Gear Wheel Shaft

(5) Reel S. T. Shaft

(1) (2) (3) (4): KG-684G

(Green)

(5): PL-433 (Yellow)

Cam Part

(PL-433.Yellow)

Gear Part

(PL-433.Yellow)

Boss Part Side Wall

(PL-433.Yellow)

Gear Part Side Application

(PL-433.Yellow)

Cam Part Side Application

(KG-684G.Green)

Gear Sector Gear Cam

Base Loading Gear Drive

Inner Surface of

Guide Rail

(KG-684G.Green)

Chassis (L) Chassis (R)

Gear Part

(1) Inner Side Surface and Top

Surface of Loading Path

(2) Stable Adhesion Part of Base

P2, P3 Coil

(3) Gear Cam Shaft

(4) Gear Drive Shaft

(5) Clutch Shaft Groove

(6) Guide Part on the Plate Slider

Side Wall (Left)

(7) Guide Part on the Plate Slider

Side Wall (Right)

(1) (2) (3) (4) (5) (6) (7): KG-

684G (Green)

Chassis (TOP)

Chassis (Bottom)

Cam Part

(KG-684G , GREEN)

Cam Part

(KG-684G , GREEN)

Gear Rack F/L

Lever, Brake Driving Cam Part

Side Wall Guide Part

Lever F/R Driving Part Side Wall Guide Part

Lever, Spring Driving Part

Lever Tension Driving Cam Part

Gear Sector Driving Part

Plate Slider

PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION

4-22

Lever, F/R, Base, Tension GEAR AY, P2 & P3

LEVER, F/R

Clutch Contact Part

(PL-433, Yellow)

Tension Arm Party

Hinge Part (PL-433, Yellow)

BASE, TENSION

PL-433

MECHANISM TROUBLESHOOTING GUIDE

4-23

Auto REW doesn't work.

Is the supply to the END sensor

END sensor "H"?

“H”: more than 3.5V

“L”: less than 0.7V~1V

Is the voltage across IR LED

between 0.8~1.5V? Replace LED.

Is the Vcc. voltage of End sen-

sor 5V? Check the syscon power.

Replace End sensor.

Check syscon circuit.

YES

1.Deck Mechanism

No F/R modes.

Is the present mode, F/R

Mode?

Is the mode SW assembled

correctly (refer to Pages 4-14.)

Is the normal voltage supplied

to the Capstan Motor Vcc1,

Vcc2.?

Is terminal voltage (Vctl) of

Capstan Motor supply side

more than 4V?

Check Servo, Power Circuits.

Replace the Capstan Motor.

Does the Capstan Motor rotate?

Does the T/Up, Supply Reel

rotate?

Check syscon circuit.

YES

4-24

MECHANISM TROUBLESHOOTING GUIDE

AUTO STOP.

(PLAY/CUE/REV)

Are there T/up and supply reel

pulses.

In Play/Cue/Rev is the pinch

roller in contact with the cap-

stan shaft.

Replace Reel Sensor.

Is the output of DFG, DPG OK?

Check aligment positions (page

4-14) Check Pinch spring.

Replace Drum Motor.

Check Servo, Syscon.

Check the Syscon, µ-COM.

No cassette loading.

Insert the cassette.

Check CST Holder Assembly.

Is there variation for CST IN

S/W Output?

(In Tape with REC Tab

“L”c"“H”"“L”)

(In Tape without REC Tab

“L”"“H”"“L”"“H”)

Does the CST IN S/W work

normally?

Does the lever Assembly S/W

work normally.

Check Syscon Circuit. Check Syscon Circuit.

Replace CST IN S/W.

YES

YES YES

YES

NO NO

YES

4-25

MECHANISM TROUBLESHOOTING GUIDE

In PB mode Tape Presence

not sensed.

Is the Pinch Roller attached to

the Capstan Motor Shaft?

Check Alignment positions

(page 4-14)

Does the T/Up Reel turn? Replace the Belt.

Is the Belt ok?

Does the Drum Motor turn?

Are there DPG, DFG Pulses?

Are the T/Up Supply Reel

Sensors ok?

Check Syscon, Circuit.

Check Servo, Syscon.

Does the Capstan Motor turn?

Is the terminal voltage of the

Drum Motor more than 2.3V?

Replace the Drum Motor.

Is the Vcc voltage of the Drum

Motor normal?

Check the clutch and the Idler

Assembly.

YES

Is the terminal voltage of

Capstan Motor supplied more

than 4V?

Replace the Capstan Motor.

Is the Voltage supplied to the

Capstan Motor Vcc1,Vcc2 each?

YES

Check Servo, Power.

MECHANISM TROUBLESHOOTING GUIDE

4-26

Cassette cannot be inserted.

Does the Lever Assembly

Switch work?

Is the Lever Assembly Switch

Spring damaged or omitted?

Does the CST IN Switch work

normally?

Replace or add the Lever

Assembly Switch Spring.

Is the Vcc of Main P.C.Board

5V?

YES

Check syscon circuit.

YES

Check power circuit.

Is the voltage between cassette

switch and GND on Main

P.C.Board 5V??

YES

Is there a short circuit between cassette switch

and GND on main P.C.Board?

Remove the short circuit part or

Replace the main P.C.Board.

Check Mode switch location

and syscon circuit.

Replace CST IN Switch.

YES

NO NO

Replace CST IN Switch.

Cassette will not eject.

Does the L/D motor rotate in reverse? Check L/D Motor or Drive IC.

Replace lever Assembly Switch.

Does the Lever Assembly Switch work?

YES

Does the F/L Arm Assembly work normally?

YES

Does the Door Opener work?

YES

Replace F/L Arm Assembly .

Replace the Door Opener.

2. Front Loading Mechanism

MECHANISM TROUBLESHOOTING GUIDE

4-27

Cassette will not load.

Does the CST insert?

Is the Door opener assembled correctly?

Replace the Lid Opener.

Replace the F/L Arm Assembly.

Check the power of L/D Motor.

Is the Cassette Holder Assembly

assembled correctly?

Replace the F/L Rear Rack.

Does the F/L Gear Rack work?

Does the Door Opener work?

Does the F/L Arm Assembly work?

Does the L/D Motor work?

Does the Cassette Holder Assembly

move the F/L Arm Assembly?

Replace the Front Loading Mechanism

Assembly.

YES

YES NO

4-28

EXPLODED VIEWS

100

A21

A23

A24

032

109

A22

054A

054

115

116

110

112 113 114

103 105

102

106

107

1. Front Loading Mechanism Section

EXPLODED VIEWS

4-29

008

011

031

079

017

032

024

406

031

021

028

029

026

A03

027

022

003

004

006

007

014

015

009

409

013

016

012

OPTIONAL PART

A01

405

2. Moving Mechanism Section (1)

EXPLODED VIEWS

4-30

052

517

061

056

518 052A

055

410

032

077

076

078

060

051

064

A11 A12

067 066

065

068

069

070

023

080

058

3. Moving Mechanism Section (2)

CONTENTS

SECTION 5

RL-05 LOADER PART

ELECTRICAL TROUBLESHOOTING GUIDE ......................................................................................................5-2

WAVEFORMS .................................................................................................................................................................5-16

1. POWER & RESET SIGNAL .......................................................................................................................................5-16

2. MAIN CLOCK1 FOR IC202 (16.9MHZ)......................................................................................................................5-16

3. SDRAM CLOCK .........................................................................................................................................................5-17

4. TRAY OPEN/CLOSE SIGNAL 1.................................................................................................................................5-17

5. TRAY OPEN/CLOSE SIGNAL 2.................................................................................................................................5-18

6. SLED MOVE SIGNAL 1 .............................................................................................................................................5-18

7. SLED MOVE SIGNAL 2 .............................................................................................................................................5-19

8. FOCUS SEARCH SIGNAL.........................................................................................................................................5-19

9. LASER TURN ON SIGNAL ........................................................................................................................................5-20

10. DISC TYPE JUDGEMENT WAVEFORM (CD SERIES) ..........................................................................................5-21

11. DISC TYPE JUDGEMENT WAVEFORM (CD&CD-R)..............................................................................................5-21

12. DISC TYPE JUDGEMENT WAVEFORM (CD-RW)..................................................................................................5-22

13. DISC TYPE JUDGEMENT WAVEFORM (DVD SERIES) ........................................................................................5-22

14. DISC TYPE JUDGEMENT WAVEFORM (DVD_SINGLE&R) ..................................................................................5-23

15. DISC TYPE JUDGEMENT WAVEFORM (DVD _DUAL)..........................................................................................5-23

16. DISC TYPE JUDGEMENT WAVEFORM (DVDRW) ................................................................................................5-24

17. SPINDLE WAVEFORM1 ..........................................................................................................................................5-24

18. SPINDLE WAVEFORM2 ..........................................................................................................................................5-25

19. FOCUS ON SIGNAL(CD).........................................................................................................................................5-25

20. FOCUS ON SIGNAL(CD))........................................................................................................................................5-26

21. FOCUS ON SIGNAL(DVD) ......................................................................................................................................5-26

22. FOCUS ON SIGNAL (DVD) .....................................................................................................................................5-27

23. TRACK OFF SIGNAL(CD) .......................................................................................................................................5-27

24. TRACK OFF SIGNAL(DVD) .....................................................................................................................................5-28

25. TILT DRIVER SIGNAL(DISC READING) .................................................................................................................5-28

26. RF WAVEFORM(DVD) .............................................................................................................................................5-29

27. RF WAVEFORM(CD) ...............................................................................................................................................5-29

28. WOBBLE(DVD-R/RW)_READING ...........................................................................................................................5-30

29. WOBBLE(DVD+R/RW)_READING&WRITING =>X1 SPEED .................................................................................5-30

30. LD ENABLE(DVD) ....................................................................................................................................................5-31

31. LD ENABLE(CD) ......................................................................................................................................................5-31

32. LASER POWER(READING)_DVD+RW...................................................................................................................5-32

33. LASER POWER(ERASE)_DVD+RW .......................................................................................................................5-32

34. LASER POWER(WRITING)_INITIAL STATE ...........................................................................................................5-33

35. LASER POWER(WRITING)_PROCESSING ...........................................................................................................5-33

THE DIFFERENCE OF DVD-R/RW, DVD+R/RW DISCS AND DVD-ROM ..............................................5-34

1. RECORDING LAYER .................................................................................................................................................5-34

2. DISC SPECIFICATION...............................................................................................................................................5-35

3. DISC MATERIALS......................................................................................................................................................5-34

4. ORGANIZATION OF THE INNER DRIVE AREA, OUTER DRIVE AREA,

LEAD-IN ZONE AND LEAD-OUT ZONE....................................................................................................................5-39

5. ALPC(AUTOMATIC LASER POWER CONTROL) CIRCUIT .....................................................................................5-43

HOW TO USE TEST TOOL.......................................................................................................................................5-44

BLOCK DIAGRAMS ...................................................................................................................................................5-51

1. OVERALL BLOCK DIAGRAM ....................................................................................................................................5-51

2. DSP BLOCK DIAGRAM .............................................................................................................................................5-52

3. µ-COM BLOCK DIAGRAM .........................................................................................................................................5-53

4. RF BLOCK DIAGRAM................................................................................................................................................5-54

CIRCUIT DIAGRAMS ..................................................................................................................................................5-55

1. RF1 CIRCUIT DIAGRAM ..........................................................................................................................................5-55

2. DSP CIRCUIT DIAGRAM ...........................................................................................................................................5-57

3. µ-COM CIRCUIT DIAGRAM.......................................................................................................................................5-59

CIRCUIT VOLTAGE CHART .....................................................................................................................................5-61

PRINTED CIRCUIT DIAGRAMS..............................................................................................................................5-63

1. MAIN P.C.BOARD .....................................................................................................................................................5-63

2. MAIN P.C.BOARD .....................................................................................................................................................5-65

5-2

ELECTRICAL TROUBLESHOOTING GUIDE

Reset or Power Check.

Check it after connecting the power cable

only for NO Reset or Power ON.

•Check the power(5V,12V)short.

•Check the power cable.

•Repair the power part.

•Check the LIC505(3.3V reg.IC).

•Check the HRST signal of LIC301

•Check the LX301

•Check the oscillation LIC302, LIC303

Are the pin 4, 1 of LCN202

+12V, +5V respectively after the power

cable connecting?

Does the pin 3

of LIC303 change 0V to 3.3V

at the power supply initial

input mode?

Are the LX301 oscillating?

<Power>

•Is the pin 5 of LIC505 3.3V?

•Is the pin 4 of LIC505 1.5V?

YES

•1V(IREF):Check pin 112 of LIC301

•1.65V(REFIN):Check pin 134 of LIC301

•2.1V(REFI2):Check pin 12 of LIC201

•2.3V(REF01):Check pin 13 of LIC201

•2.3V(FPDVREF):Check pin 25 of LIC201

•3.3V(REFI):Check pin 38 of LIC201

•1.65V(REF02):Check pin 39 of LIC201

5-3

System Check

Load tray without inserting disc.

Go to “Tray operating is abnormal”

Go to “Sled operating is abnormal”

Go to “Laser operating is abnormal”

Go to “Focus Actuator operating is

abnormal”

Go to “Recognition fail Case1”

(CD-ROM Disc)

Go to “Recognition fail Case2”

(DVD Disc)

Go to “Recognition fail Case3”

(DVD±R/RW Disc)

Does tray operate normally?

YES

Does pick-up move to inside?

Does laser turn on?

After eject tray, insert DVD Disc

and check rotation.

After eject tray, Insert DVD±R/RW Disc

and check rotation

Does disc rotate

continuously and the drive recognize

the disc?

Does disc rotate

continuously and the drive recognize

the disc?

Does disc rotate

continuously and the drive recognize

the disc?

After eject tray, Insert CD-ROM Disc

and check rotation

Does pick-up lens move

up/down?

5-4

Tray operating is abnormal

Tray open doesn ’t work.

•Check the connection of LIC301 pin 106.

•Replace the EJECT SW.

•Replace the LIC502.

•Check the communication line between

LIC502 and LIC301.

Is there tray

control signal input?

(LIC502 pin46)

When LCN504 is open,

Is there tray drive signal

output?

Is there tray

drive voltage output?

(LIC502 pin 1, 2)

•Check the connector (LCN504).

Is the

Input voltage 0V at LIC301

pin 60 when push the

EJECT SW?

YES

YES YES

5-5

Sled operating is abnormal

Replace the LIC301

•Replace the IC102.

•Check the LR532, LR533.

Is there sled

control signal output?

(LIC301 pin 126, 127)

YES

Is there

sled drive signal input?

(LIC502 pin 29, 30)

Is DRV-CTRL1

signal “H”?

(LIC502 pin35)

Replace the LIC502

Replace the sled motor.

Is there

sled drive voltage output?

(LIC502 pin 37~40)

Is there

sled drive voltage output?

(LCN501 pin 1,2,3,4)

Check the connection LCN501.

5-6

Spindle operating is abnormal

Is there

spindle control signal input?

(LIC502 pin 26)

Is there

spindle drive voltage output?

(LIC502 pin 11,13,16)

Is there

SFG signal input?

(LIC301 pin 53)

Replace the LIC301.

•Replace the LIC301

Is there

spindle control DSP

output(LIC301 pin 123)?

NO NO

NONO

YESYES

YES YES

•Replace the LIC102.Replace the Spindle Motor

5-7

Focus Servo is unstable

Replace the LIC201.

•Check the R534.

•Replace the LIC201.

• Check the connection of LIC301 pin 124.

• Check the communication line between

LIC205 and LIC301.

• Replace the LIC205.

• Replace the IC301.

Is FE signal

output normal in Focusing

Up/Down?

(LIC201 pin 87)

Is FDRV signal

output normal in Focusing

Up/Down?

(LIC301 pin 124)

Go to “Focus Actuator

operating is abnormal”

Focus Actuator operating is abnormal.

Is there focus

search control signal input?

(LIC502 pin 5)

Is there focus

search drive voltage output?

(LIC502 pin 51,52)

Is DRV-CTRL1

signal “H”?

(LIC502 pin 35)

Replace the LIC502.

•Check the connection CN102 pin 40,41.

•Check the connector LCN201.

Replace the pick-up. After replacing Perform

5. Optical Power Setting from ‘How to use Test tool’.

YES

YES YES

NO NO

5-8

Track Servo is unstable

Is TE signal

output normal in focusing

ON and tracking OFF?

(LIC201 pin 85)

YES

NO NO

YES

Is pick-up

(E, F, G, H)output normal?

(LCN201 pin 5, 8, 9, 12)

Replace the LIC201.

Replace the LIC301.

•Check the pick-up FFC.

•Replace the pick-up.

•After replacing Perform 5. Optical Power Setting

from‘How to use Test tool’.

Check the connection between

LIC301(pin133)and LIC201 pin 85.

Is TE signal

input normal in focusing

ON and tracking OFF?

(LIC301 pin 133)

Is there TDRV

signal output in tracking ON?

(LIC301 pin 125)

Check the LIC502 and pick-up referring to

“Focus Actuator operating is abnormal”.

5-9

Recognition Fail Case 1:

CD-ROM Fail

Check pick-up read power

is 0.9~1.3mW? Go to “LD CHECK”.

Go to “Focus Servo is unstable”.

Replace the LIC201

Go to “Tracking Servo is unstable”.

•Check the pick-up FFC and LCN201.

•Replace the pick-up unit.

Does focus servo

operate normally?

Check pick-up

RF signal LIC201(Pin113) is

500~1000mVpp?

Check RFEQO waveform

(LIC201 Pin 95) is

800~1200mVpp?

Check after replacing LIC301.

Is it OK?

YES

5-10

Recognition Fail Case 2:DVD Fail

Check pick-up read power

was 0.9~1.1mW? Go to “LD CHECK”.

Replace the LIC201.

Replace the pick-up.

Replace the LIC201

Replace the LIC301.

Is LIC201

pin 51(CD/DVD) level

was about 0V?

Is there

RF signal at LCN201pin 13,14.

Is there RF signal

at LIC201 pin 95.

Check again after the

replace LIC201. Is it OK?

Recognition Fail Case 3:

DVD±R/RW Fail

Is there AWOBBLE

(LIC201 pin 81)signal? Is there a wobble

(LIC301 pin 135)signal?

Replace the LIC301.

Check the connection between

LIC201 and LIC301.

Replace the LIC201.

YES

5-11

LD CHECK

(Laser operating is abnormal)

Perform 6. Optical Power Setting parameter

check from‘How to use Test tool’.

Execute “C.Laser Power Setup”of

“How to use Test Tool”

Check reference voltage.

FPD

VRDC

VWDC1

VWDC2

Is ALPC parameters

valid?

Perform 4. LD Test check from

‘How to use Test tool’.

OFF level

VRDC level &FPD

VWDC1 level &FPD

VWDC2 level &FPD

5-12

CD/DVD ? DVD

Select Mode: CD, Test and perform

Test from 4. LD Test of ‘How to use

Test tool’

Select Mode: DVD, Test and perform

Test from 4. LD Test of ‘How to use

Test tool’

Check the input of CD/DVD.

(pin 17 of LCN201 :‘H ’)

Check the input of CD/DVD.

(pin 17 of LCN201 :‘H ’)

Check the input of VRDC.

(pin 34 of LCN201)

Check the input of FPD.

(pin 19 of LCN201)

END

5-13

Select Mode: DVD, Test and perform

Test from 4. LD Test of ‘How to use

Test tool’

Check the input of CD/DVD.

(pin 17 of LCN201 : ‘L’)

Check the input of VWDC.

(pin 36 of LCN201)

Check the input of recording pulse.

(pin 28, 29, 30, 31, 32, 33 of LCN201)

Check the input of FPD.

(pin 19 of LCN201)

END

Select Mode: DVD, Test and perform

Test from 4. LD Test of ‘How to use

Test tool’

Check the input of CD/DVD.

(pin 17 of LCN201 : ‘L’)

Check the input of VWDC.

(pin 36 of LCN201)

Check the input of recording pulse.

(pin 28, 29, 30, 31, 32, 33 of ILCN2018)

Check the input of FPD.

(pin 19 of LCN201)

END

5-14

In case of writing fail.

Normal Case

Check disc label.

Eject disc.

Go to “Writing Part Check”.

Remove the dust,fingerprint and

if the disc has long width scratch,

change it.

Check the media

DVD ±R/RW?

Does the disc

have any dust,scratch,

fingerprint …?

Finalized Disc?

If DVD ±R disc,use new DVD ± R disc.

If DVD ±RW disc,erase the disc.

YES

5-15

Writing Part Check

Load tray with DVD ±R/RW disc.

Press the “REC” key.

Does writing finish

without any error?

Is the written file

read normally?

Check and replace the connection of

LIC301 pin 148.

Eject tray.

Go to “LD CHECK”.

Is the re-written file

read normally?

Is SHAPCRE

input signal pulse?

(LIC01 pin 62)

Check and replace LIC201, LIC301.

YES

5-16

WAVEFORMS

1. POWER & RESET Signal

2. Main Clock1 for IC202 (16.9MHz)

POWER IN

12 V(LCN302 PIN4)

5V(LCN302 PIN 1)

/SYSRST(LIC303 PIN2)

LX301(LIC301 PIN 2)

GND LEVEL

/HRST(LIC303 PIN 3)

5-17

3. SDRAM Clock

4. TRAY OPEN/CLOSE SIGNAL 1

MCLK(LIC304 PIN 35)

/EJECT-KEY (LR504)

TRAY+(LCN504 PIN 3)

TRAY-(LCN504 PIN 4)

TRAY-CTRL

(LIC502 PIN46)

OPEN

5-18

5. TRAY OPEN/CLOSE SIGNAL 2

6. SLED MOVE SIGNAL 1

/EJECT-KEY(LR504)

SDRV2(LIC502 PIN31)

SDRV1(LIC107 PIN29)

ZOOM

A+(LCN501PIN 2)

A-(LCN1501 PIN 1)

TRAY-CTRL(LIC502 PIN46)

/LOAD-SW

(LCN504 PIN 2)

/OPEN-SW(LCN504 PIN 1)

CLOSE OPEN

5-19

7. SLED MOVE SIGNAL 2

8. FOCUS SEARCH SIGNAL

SDRV2(LIC502 PIN31)

FDRV (LIC502 PIN 5)

F+ (LIC502 PIN 52)

F- (LIC502 PIN 51)

SDRV1(LIC107 PIN29)

A+(LCN501PIN 2)

A-(LCN1501 PIN 1)

5-20

9. LASER TURN ON SIGNAL

F+ (LIC502 PIN 52)

LDEN-DVD(LCN201 PIN17)

VRDC(LCN201PIN 34)

5-21

11. DISC TYPE JUDGEMENT WAVEFORM (CD&CD-R)

10. DISC TYPE JUDGEMENT WAVEFORM (CD SERIES)

FDRV(LIC502 PIN 5)

FE(LIC201 PIN87)

TE(LIC201 PIN85)

RF(LIC201PIN 113)

FDRV(LIC502 PIN 5)

FE(LIC201 PIN87)

TE(LIC201 PIN85)

RF(LIC201PIN 113)

5-22

12. DISC TYPE JUDGEMENT WAVEFORM (CD-RW)

13. DISC TYPE JUDGEMENT WAVEFORM (DVD SERIES)

FDRV(LIC502 PIN 5)

FE(LIC201 PIN87)

TE(LIC201 PIN85)

RF(LIC201PIN 113)

FE(LIC201 PIN87)

TE(LIC201 PIN85)

RF(LIC201PIN 113)

5-23

14. DISC TYPE JUDGEMENT WAVEFORM (DVD_SINGLE&R)

15. DISC TYPE JUDGEMENT WAVEFORM (DVD _DUAL)

FDRV(LIC502 PIN 5)

FE(LIC201 PIN87)

TE(LIC201 PIN85)

RF(LIC201PIN 113)

FDRV(LIC502 PIN 5)

FE(LIC201 PIN87)

TE(LIC201 PIN85)

RF(LIC201PIN 113)

5-24

16. DISC TYPE JUDGEMENT WAVEFORM (DVDRW)

17. SPINDLE WAVEFORM1

FDRV(LIC502 PIN 5)

FE(LIC201 PIN87)

TE(LIC201 PIN85)

RF(LIC201PIN 113)

MDRV (LIC502 PIN 26)

REFOUT (LIC502 PIN 42)

SFG((LIC502 PIN43)

5-25

18. SPINDLE WAVEFORM2

19. FOCUS ON SIGNAL(CD)

U((LIC502 PIN11)

V((LIC502 PIN13)

W((LIC502 PIN16)

SFG(LIC502 PIN43)

FDRV (LIC301 PIN 124)

FE (LIC201 PIN87)

TDRV (LIC301 PIN 125)

TE (LIC201 PIN85)

5-26

20. FOCUS ON SIGNAL(CD)

21. FOCUS ON SIGNAL(DVD)

FDRV (LIC301 PIN 124)

FE (LIC201 PIN87)

TDRV (LIC301 PIN 125)

TE (LIC201 PIN85)

FDRV (LIC301 PIN 124)

FE (LIC201 PIN87)

TDRV (LIC301 PIN 125)

TE (LIC201 PIN85)

5-27

22. FOCUS ON SIGNAL (DVD)

23. TRACK OFF SIGNAL(CD)

FDRV (LIC301 PIN 124)

FE (LIC201 PIN87)

TDRV (LIC301 PIN 125)

TE (LIC201 PIN85)

TE (LIC106 PIN85)

TZC(LIC106 PIN74)

MIRRBCA(LIC106 PIN77)

5-28

24. TRACK OFF SIGNAL(DVD)

25. Tilt Driver signal(Disc reading)

TE (LIC106 PIN85)

TZC(LIC106 PIN74)

MIRRBCA(LIC106 PIN77)

TILTDRV(LIC502 PIN47)

TILT+(LIC502 PIN50)

TILT-(LIC502 PIN49)

5-29

26. RF WAVEFORM(DVD)

27. RF WAVEFORM(CD)

RFP(LIC201 PIN2)

RFO(LIC201PIN 113)

RFI(LIC201 PIN 95)

RFP(LIC201 PIN2)

RFO(LIC201PIN 113)

RFI(LIC201 PIN 95)

5-30

28. WOBBLE(DVD-R/RW)_READING

29. WOBBLE(DVD+R/RW)_READING& WRITING => X1 SPEED

AWOBBLE(LIC201 PIN81)

LPP/HEAD(LIC201 PIN 73)

AWOBBLE(LIC201 PIN81)

LPP/HEAD(LIC201PIN 73)

5-31

30. LD Enable(DVD)

31. LD Enable(CD)

CD/DVD(LCN201 PIN 17)

LDEN(LCN PIN 38)

CD/DVD(LCN201 PIN 17)

LDEN(LCN102 PIN 38)

5-32

32. Laser Power(reading) _ DVD+RW

33. Laser Power(Erase) _ DVD+RW

VRDC(LCN201 PIN 34)

VWDC(LCN201 PIN 36)

VWDC2(LCN201 PIN 35)

OPCTRG(LIC301 PIN 151)

VRDC(LCN201 PIN 34)

VWDC(LCN201 PIN 36)

VWDC2(LCN201 PIN 35)

OPCTRG(LIC301 PIN 151)

5-33

34. Laser Power(Writing) _ initial state

35.Laser Power(Writing)_Processing

VRDC(LCN201 PIN 34)

VWDC(LCN201 PIN 36)

VWDC2(LCN102 PIN 35)

OPCTRG(LIC301 PIN 151)

VRDC(LCN201 PIN 34)

VWDC(LCN201 PIN 36)

VWDC2(LCN201 PIN 35)

5-34

The difference of DVD-R/RW, DVD+R/RW discs and DVD-ROM

1. Recording Layer

0.74 um

0.4 um

• DVD-ROM (Read Only Disc)

• DVD+R/RW Disc

5-35

2. Disc Specification

3. Disc Materials

1) DVD-ROM

< Single Layer >

< Dual Layer >

5-36

The format that records data through the creation of recorded marks by changing the organic dye material with a

laser beam.

[ Recording ]

Recording is done by changing the organic dye layer and the substrate with a laser When a strong laser is applied

to a disc, the temperature of the organic dye material goes up, the dye is decomposed and the substrate changes

at the same time. At this time, a durable bit is created as is the case with a CD-ROM.

[ Playback ]

Signals are read with the differences of the reflection of a laser from pits.

2) Recording format using organic dye material

( DVD-R / DVD+R )

G Disc structure

G Recording principles

5-37

• Data is recorded by changing the recording layer from the amorphous status to the crystalline status, and played

back by reading the difference of the reflection coefficient.

Amorphous: Non-crystalline.

[ Recording ]

When a high-power laser is applied to the recording material, it melts and then becomes amorphous with a low

reflection coefficient when it quickly cools off. When a mid-power laser is applied to heat gradually the recording

material and then gradually cools it off, it becomes crystal with a high reflection coefficient.

[ Playback ]

A low-power laser is used for playback. The amount of reflected light depends on the status (amorphous or crys-

talline) of the recording material. This is detected by an optical sensor.

3) Recording format using phase-change recording material

( DVD-RW / DVD+RW )

G Disc structure

G Recording principles

5-38

To make recordings, it is necessary to modulate the write pulse, which is called “Write Strategy”.

There can be many types in Write Strategy. Typically Write Strategy for DVD ±R has NMP(Non Multi-Pulse) type and

MP(Multi-Pulse) type. In NMP type each single mark is created by subsequent separated short pulses. In MP type each

single mark is created by one continuous pulse.

Write Strategy for DVD ±RW has Type 1 and Type2. In Type 1 the mark with nT width is created by one top pulse and (n-2)

multi-pulses. Thus mark 3T is made by one top pulse and one multi-pulse. In Type 2 the mark with nT width is created by

one top pulse and (n-3) multi-pulses. Thus mark 3T is made by one top pulse only.

RL-02A uses MP type Write Strategy for DVD ±R and Type 1 for DVD ±RW as shown below.

Po :Write Power (Peak Power)

Pe :Erase Power

Pb :Bias Power

Recording data Twd (3T )

Twd ( 8T )

Ttop

Tmp

Ttop

Zero Level Pb

Write pulse

for DVD R

Ttop Ttop

Tmp

Write pulse

for DVD RW Tmp

Zero Level

Tcl Tcl

5-39

Inner Disc Test Zone : for performing OPC procedures.

Inner Disc Count Zone : For counting the number of OPC algorithm performed in IDT Zone.

Outer Disc Test Zone : for performing OPC procedures.

Outer Disc Count Zone : For counting t he number of OPC algorithm perf ormed in IDT Zone.

2) Layout of DVD+R disc

1) Layout of DVD-ROM disc

Information Zone

Center

holeClamping

Zone

Diameter 120 mm

Diameter 15mm

Data ZoneLead-in Zone Lead-out Zone

Read Only Disc

Disc Center

Diameter 16mm

Diameter 22mm

3th transition

area

Diameter 33mm

Diameter 44mm

1th transition area

2th transition areaRim

area

Data Zone

Lead-in

Zone

Inner Drive

Area

Unrecorded Disc

Outer Drive

Area

Inner Disc

Test Zone

27080H 28480H

Information Zone

Center

holeClamping

Zone

Diameter 120 mm

Diameter 15mm

Disc Center

Diameter 16mm

Diameter 22mm

3th transition

area

Diameter 33mm

Diameter 44mm

1th transition area

2th transition areaRim

area

Lead-out

Zone

23080H

PSN :

Inner Disc

Count Zone

27480H2A480H 30000H

out

Outer Disc

Test Zone

261940H 263940H

260540H

Outer Disc

Count Zone

262940H 267940H

4. Organization of the Inner Drive Area, Outer Drive Area, Lead-in Zone

and Lead-out Zone

5-40

Inner Disc Test Zone : for performing OPC procedures.

Inner Disc Count Zone : For counting the number of OPC algorithm performed in IDT Zone.

Outer Disc Test Zone : for performing OPC procedures.

Outer Disc Count Zone : For counting t he number of OPC algorithm performed in IDT Zone.

3) Layout of DVD+RW disc

Data Zone

Lead-in Zone

Unrecorded Disc

Lead-out Zone

Inner Disc

Test Zone

2A7C80H 2DC80H

Information Zone

Center

holeClamping

Zone

Diameter 120 mm

Diameter 15mm

Disc Center

Diameter 16mm

Diameter 22mm

3th transition

area

Diameter 33mm

Diameter 44mm

1th transition area

2th transition areaRim

area

2A480H

PSN :

Inner Disc

Count Zone

30000H

out

Outer Disc

Test Zone

265940H

260540H

Outer Disc

Count Zone

262940H 266140H

5-41

4) Layout of DVD-R/RW disc

Data Recordable Area

Lead-in

Area

R-Information

Area

Information Area

PCA

(Power Calibration

Area)

203B0H 22F90H

Unrecorded Disc

Center

holeClamping

Area

Diameter 120 mm

Diameter 15mm

Disc Center

Diameter 16mm

Diameter 22mm

3th transition

area

Diameter 33mm

Diameter 44mm

1th transition area

2th transition areaRim

area

Lead-out

Area

1E800H

PSN :

RMA

(Recording

Management Area)

203C0H22FA0H 30000H

5-42

uPD63630

Write

Strategy

Write

S/H Signal

IC 201

CN 102

IC 106 ( uPC3330 )

Optical

Pick-up

HOP-7521T

Drive

19 24 PDIN

3234

WLD

VWDC

3435 PELD

VWDC2 58 166

WLDON

RLD

DC 62 160

SHAPCRE

S/H &

VRDCG

S/H &

VWDC1G

VWDC1

DAC

& Gain

SHAPCW

159

VWDC2_

DAC

VWDC1_

DAC

VRDC_

DAC

VRDC

DAC

& Gain

18 25

FPDVC

FPDVREF

FPD

‘H’

RLDON

5. ALPC(Automatic Laser Power Control) Circuit

1) Block Diagram

2) ALPC(Automatic Laser Power Control) Circuit Operation

ALPC function in CD-R/RW,DVD+R/RW analog front-end is for constant power level control purpose.

Based on the accurate power sensor(FPD) in OPU, ALPC feedback loop maintains constant power level against

laser diode’s temperature variation.

There are two power control loops in uPC3330, which are used with different combination for different applications.

Generally, the first ALPC loop is used for read-power control. The 2nd ALPC loop is used for write(erase) power

control for CD-R/RW and DVD+R/RW disc.

Owing to the small signal level in read-power control mode, the first ALPC loop amplifies the FPD signal to enhance

the accuracy of read power control. The built-in 10-bit DAC(VRDC_DAC) is used to set the read power level.

Moreover, the 2nd ALPC loop is used for high power control. The built-in 10-bit DAC(VWDC1_DAC) is used to set

the wanted power level.

And the register VWDC1G is employed to adjust the gain of FPD signal.

The following potentiometers(VRDC_DAC, VWDC1_DAC, and VWDC2_DAC) and amplifiers (VRDCG and

VWDC1G) are used to set the wanted levels of the output pins RLD, WLD, and PELD

5-43

How to use test tool

1. ALPC Measurement System Configuration

In order to measure and adjust DVD RW optical power, The following measurement equipments are needed.

NCompulsory equipment

➀ Optical Power meter & Sensor (ADVANTEST, TQ8210/Q82017A or equivalent

➁ Personal Computer (Pentium 3, 500MHz Above, , RAM:64M Above, Win98 Above)

➂ Adjustment Program (Dragon or ALPC) for SVC, ALPC Program recommended

NFl optional equipment

➀USB-ATAPI Interface (needed when using USB Port from the laptop computer without ATAPI interface or a desktop

computer)

➁Connector-ATAPI Interface Board(Part Mo:6881R-7677A) (needed when ATAPI is not attached to Loader)

Optical

Power Meter

USB-ATAPI Interface

Loader Ass’y

Connector-ATAPI Interface Board

Personal Computer

(Desktop or Notebook)

5-44

2. ALPC Program Configuration

ALPC Program consists of total 4 files.

ALPC.exe

LgBada.dll

modelnm.txt

WNASPI32.DLL

These 4 files should be located in one directory.

ALPC.exe is a program execution file.

modelmn.txt is a configuration file.

Determine how to connect

The following contents are included when you open "modelnm.txt" file.

The following contents are included when you open LGE connect=0

connect=0 is the item which you can determine whether you use Serial or ATAPI.

0 : ATAPI

1 : Serial

Thus, select connect=0 to use ATAPI, or select connect=1 to use Serial, then save the file.

(For SVC, ATAPI setting is recommended.)

5-45

3. Running ALPC Program

When running ALPC.exe file, the following screen appears.

CD/DVD

Selection

Laser Power

Setup window

Laser Read

Power On

Laser Write

Power

Laser off Used When inputting

to EFROM after Lser

power measurement

When Laser

Power Test

ALPC Setup or LD

Test Selection

Result output

window

EEPROM

Data output

Display what is selected

in modelnm.txt

5-46

4 LD Test

* Test DVD LD * Test DVD CD

➀ Select DVD mode ➀ Select CD mode

➁ Select Test mode ➁ Select Test mode

➂ Click ➂ Click

Test

Section Off VRDC VR_FPD VWDC1 VW_FPD VW2-1 VW2-2

CD 2.4±0.08 0.53±0.22 0.02±0.01

DVD 2.4±0.08 0.7±0.2 0.04±0.01 0.43±0.05 0.2±0.02 0.08±0.02 0.2±0.03

Test result output when

All OK, OK

Specification can be changed according to pick-up type, circuit, program, and chipset.

If specifiction is changed, program can be sent by supervisor.

Specification above is temporary reference.

5-47

5. Optical Power Setting

When replacing Travers ass’y including Pick-up or Loader PCB, Optical Power Setting should be performed for Pick-up

and Loading PCB’s matching.

➀ DVD LD optocal Power Setting

• Select DVD and Setup mode

• Push . (Read Power On. Strong Red light can be seen from pick up optical lens.)

• Measure optical power.

• Write measurement value in Read Power.

• Push . (Write power On.) (Caution) Light is very strong. Never look at the light directly.

• Measure optical power

• Write measurement value in Read Power and push LD off .

• Push . (Measurement value is inputted to EEPROM)

➁ DVD LD optocal Power Setting

• Select CD and Setup mode

• Push . (Read Power On. Weak Red light can be seen from pick up optical lens.)

• Measure optical power.

• Write measurement value in Read Power.

• Push . (Write power On. Weak Red light can be seen.)

• Measure optical power and push LD off .

• Write measurement value in Read Power.

• Push . (Measurement value is inputted to EEPROM)

5-48

6. Optical Power Setting Parameter Check

Use when defective happens even though LD test result is normal.

When defective can be found but power test result is OK, You need to check current settings whether they are proper or

not. In this case, Pressing will display ALPC Parameter Info window and show current optical power settings

recorded in EEPROM(IC302).

Write down these settings on the paper, perform optical power setting and press again, then new optical power set-

tings will appear. Compare these two parameters. If there is a big difference, optical power setting may have been wrong at

first or pick-up optical output may have been changed. If pick-up is normal, problem can be solved by resetting optical

power without replacing pick-up.

In order to remove previous ALPC Parameter from ALPC Parameter Info, press at the bottom of ALPC Parameter

Info window.

5-49

[VALID ALPC Parameters]

<CD>

1) CD-R READ Reference DAC : 70 ~ 100

2) CD-RW READ Reference DAC : 70 ~ 100

<DVD>

1) DVD-R READ Reference DAC : 42 ~ 107

2) DVD-RW READ Reference DAC : 42 ~ 107

3) VWDC1 : 35 ~ 65

4) VWDC1 Offset : 0 ~ 6

5) VWDC2 : 20 ~ 43

6) VWDC2 Offset : 0 ~ 10

5-50

Appendix. How to measure optical power

Optical power measurement is measuring actual optical power coming out from an object lens with LD turned on.

thus, In order to measure optical power, LD should to be turned on and environment need to be dark enough.

If necessary, Cover the top side of the sensor with black paper or hand when measuring.

Generally, fluorecent light is about 50 µW, sun light is about 100 mW. so, If this is ignored, optical power setting may not be

set correctly.

Optical power mesurement procedure

1. Adjust optical power meter’s λ(wave length) to DVD. (Generally 660 nm)

2. Turn DVD LD on.

3. Place sensor less than 3mm apart from pick-up object lens, perpendicular to lens.

Adjust position so that the center of object lens match to Lmark on the sensor.

4. Read monitor’s value. (Read Maximum value as moving position slightly)

(Check working unit. Unit should be mW. When LD is dead, µW or nW unit may not be read correctly.)

5. Multiply monitor’s value by 100, round off to the nearest integer, then write constant part.

6. Adjust optical power meter’s λ (wave length) to CD. (Generally 780 nm)

7. Turn CD LD on.

8. Repeat step 3~5 above.

LDisplay Part

5-51

BLOCK DIAGRAMS

1. OVERALL BLOCK DIAGRAM

REFOUT/1.65V

LIC505

BA3258HFP

3.3V

1.5V

LIC203

XC6206P

PDVC

(2.1V)

REFI2(12)

12V

D:21,44,70,89,152

LIC301

uPD63641

LIC201

uPC3340

LIC502

BD7954BFS

Motor Driv er

A:6,119,130,171,181

D:25,85,138,186

A:120,179

11,30,40,45,57,89,98,111,114

REFI (38)

REFO2 (39)

REFIN(134)

VC(42)

REFO1(13)FPDVC(2.4V)

PDVC

3.3V

1.5V

3.3V

VCC(FM)

VREF(18)

VC(OEIC)(3)

VCC(OEIC)

VDD(LDD)

PICK

PICK-

-UP

LCN302

ATAPI

HRST

LIC303 HRST

HRESET(52)

SYSRST(16)

RST(52)

REFOUT/1.65V

5-52

2. DSP BLOCK DIAGRAM

INV.

FPD

DVD

V.REF

(FPDVC)

PRE-AMP

2AMP

CD SEL

VCC(FM)

GND(FM)

RF(-)

F2F3

E2E3

RF(+)

E2F2/C/A/E1F1

E4F4/D/B/E3F3

GAIN SW

VC(OEIC)

VCC(OEIC)

GND(OEIC)

WRITE CHANNEL 3

WRITE CHANNEL 2

WRITE CHANNEL 1

READ CHANNEL

OSC

INS (H:LVDS,L:TTL)

FPD IC

PD IC

W3 SET

W2 SET

W1 SET

R SET

OSC ENA

W3 DIS

W2 DIS

W1 DIS

W3 DISN

W2 DISN

W1 DISN

RDIS

WRPULSEP

WRPULSEM

PKPULSE1P

PKPULSE1M

OFPULSEP

OFPULSEM

VWDC

VWDC2

VRDC

AADJ2

AADJ1

FADJ1

FADJ2

TEMP

LD DRIVER

150mA

250mA

325mA

150mA 38 ENABLE

F=315MHz

(260~360)

10K

RLD

RLDM

DAC

PELD

WLD

WLDM

LIC201

uPC3340

DAC

1.2K

1.0M

2700PF

1.0M

2200PF

1.2K

1000PF

680

71 LDEN

51 CD/DVD

119 (TEMP IN)

BUF

LIC204

L.P.F

47K, 1000PF

MON1(FPD)

10K, 0.01uF

L.P.F 120

MON2

10K

2,3 RFP/RFN

7~10 A~D

E~H

13~17

168

167

164

163

173

172

174

OSCEN

WRPULSEP

WRPULSEM

PKPULSE1P

PKPULSE1M

OFPULSEP

OFPULSEM

LIC301

uPD63641

DSP & MICOM

153

174

WR/RE

WLDON(WGATE)WLDON

PDGCTRL

153

LIC202

SWRF1

FDRV

ëHí

ëLí

115

124

118 MON3

(F-JH)

270K

1000pF

L.P.F

KIC7W08FK

LIC205

NC7SB3157

FILT

LIC204

5-53

LIC301

uPD63641

ATAPI

LIC201

uPC3340 HDD[0:15]

/DIOW,/DIOR, /HDMACK, PDIAG

HDMARQ, IORDY, HINTRQ,/HIOCS16

HAD[0:2], /HCS0, /HCS1,/DASP,HRESET

(DSP & MICOM)

(RF)

LIC502

BD7954BFS

(Motor Driv er)

MDRV, FDRV, TDRV

SDRV1, SDRV2, Ti/TRV

SDRV1, SDRV2, SFG

LIC501

FLASH(16M)

FD[0:15]

FA[0:15]

/FRD

/FWR

/FCS0

LIC304

SDRAM(16M)

MD[0:15]

MA[0:15]

/CAS, /RAS

LDQM, UDQM

/WE, /CAS, /RAS

MCLK, MCKE

LIC302

E2PROM

/EPRCS, SI, SO, SCLK

RFI

CONTROL

LOGIC

CP, SCK, SI, SO

EQCK1, EQCK2

TE SIG SEL

TE,LE(PPALL),TEC

WRITE RF ROPC1, ROPC2

SWRF1,SWRF2

ALPCOPCTRG, SHAPCRE,SHAPCW

WOBBLE

S/H

MATRIX

FE. FE.

LPP

AWOBBLE,LPP

MIRR/DEFF HOLD

Read RF AGC RFEQ

SHSV,SHWB

ASY/BCA/FOK/ DETECTION RECD, FOK

WLDON(WGATE*WR/RW)

MIRR/BCA

FD[0,1,4,5,6,7]

/FCS2

/FWR

D[0:7]

LIC504

74LVC374

(D F/F)

DRV_CTRL0,1

Q[5,6]

EFM

ASY

LLOCK

FCEFM1

LQ302

LQ301

Q[0,1] Q[4,7]

ASY1.2

SWLLOCK,SWFCEFM

FRONT SW.

/LOAD SW, /OPEN SW,/EJECT KEY

3. µ-COM BLOCK DIAGRAM

5-54

4. RF BLOCK DIAGRAM

SPINDLE

MOTOR

Disc

Pick

Pick-

-up

Driver

SLED MOTOR

MECHA

Level Shift

TRAY(-)

TRAY(+)

HU,HV,HW

FG gen.

PRE LOGIC

Rev. Det

U,V,W

L.Shift L.Shift L.Shift PRE LOGIC

A+ A- B+ B-

TRK+.- F+.- TILT+,-

UVW

Ti-Tr DRV SFG MDRV TDRV FDRV SDRV1 SDRV2

BD7954BFS

(Motor Driver)

uPD63641

(DSP & MICOM)

74LVC374

(D F/F)

CTL0

CTL1

CTL0 CTL1

-- H

ALL NOT OPER.

SPIN/SLAD/ACTU

L/M

5-55 5-56

CIRCUIT DIAGRAMS

1. RF CIRCUIT DIAGRAM

A B C D E F G H I J K L M N O P Q RST

5-57 5-58

2. DSP CIRCUIT DIAGRAM

A B C D E F G H I J K L M N O P Q RST

5-59 5-60

3. µ-COM CIRCUIT DIAGRAM

A B C D E F G H I J K L M N O P Q RST

141.27

15 0

16 0

17 1.46

18 0

19 3.35

20 3.35

LIC 505

1 5.1

2 1.52

4 1.52

53.34

LIC 506

13.34

23.34

43.35

53.35

14 0

15 0

16 0

17 12.92

18 12.92

19 5.1

20 5.1

21 5.1

22 5.1

23 5.1

24 5.1

25 5.1

26 1.67

27 0

28 5.1

29 1.67

30 2.06

31 12.92

32 12.92

33 12.92

340

350

360

370

380

390

40 0

41 0

42 1.68

43 3.34

44 0

45 0

46 1.7

47 1.66

48 5.1

49 0

50 0

51 0

52 0

53 0

54 0

LIC 504

23.34

3 1.3

4 1.32

53.35

10 0

11 3.35

12 3.35

13 0.78

10 0

11 3.34

12 3.34

13 0

14 0

15 0

16 0

17 0

18 0

19 0

20 0

21 0

22 0

23 0

24 0

25 0

26 3.34

27 0

28 3.34

29 0

300

313.33

320

33 0

340

353.33

360

370

380

390

40 0

41 0

42 0

43 0

44 0

45 0

46 0

47 0

48 0

LIC 502

3 12.92

4 1.68

5 1.67

6 1.7

7 1.7

8 1.7

9 1.7

10 0

11 0

12 12.92

13 0

73.34

10 0

11 0

12 0

13 3.34

14 3.34

15 3.34

16 3.34

17 3.34

18 0

19 0

20 3.34

21 0

22 0

23 0

24 0

25 3.34

26 0

27 0

28 0

29 0

300

310

320

33 0

343.34

35 1.02

363.4

370

380

390

40 0

41 0

42 0

43 0

44 3.34

45 0

46 0

47 0

48 0

49 0

50 0

LIC 501

180 0

181 3.34

182 0

183 3.34

184 3.34

185 0

186 1.5

187 0

188 0

189 0

190 0

191 0

192 0

193 0

194 0

195 0

196 0

197 0

198 0

199 0

200 0

201 0

202 0

203 3.34

204 0

205 0

206 0

207 0

208 0

209 0

210 3.33

211 0

212 0

213 0

214 3.33

215 0

216 3.33

LIC 302

23.34

43.34

LIC 303

23.34

3 3.85

4 5.11

LIC 304

13.34

110 3.93

111 5.07

112 2.9

113 1.64

114 5.07

115 0

116 0

117 0

118 1.65

119 1.3

120 2.38

LIC 202

13.33

83.34

LIC203

2 2.13

3 5.08

LIC 204

1 1.7

2 1.69

3 1.55

6 1.35

7 1.35

8 5.08

LIC 205

1 1.97

3 1.68

4 1.68

5 5.07

1 1.61

2 1.45

3 1.42

63.34

73.34

10 0

11 0

12 0

13 0

14 0

5-61 5-62

CIRCUIT VOLTAGE CHART

STATE

MODE

PIN NO.

LIC201

22.35

3 2.35

42.36

52.36

7 2.14

8 2.14

9 2.14

10 2.14

11 5.07

12 2.13

13 2.38

14 2.14

15 2.14

16 2.14

17 2.14

18 0

19 2.39

20 0.11

21 2.38

22 0.11

23 0

24 2.38

25 2.38

26 1.71

27 0

28 0

29 0

30 5.06

310

320

33 0

340

350

36 2.52

372

383.34

39 1.68

40 5.07

41 1.57

42 1.61

43 0

44 1.26

45 5.07

46 2.36

47 2.36

48 2.41

49 2.43

50 0

51 0

52 3.34

53 3.34

54 3.34

STATE

MODE

PIN NO.

55 0

56 3.34

57 5.08

58 0

59 0

60 3.34

61 3.34

62 3.34

63 0

64 0

65 0

66 0

67 1.67

68 1.63

69 0

70 0

71 0

72 0

73 0

74 0

75 3.33

76 3.33

77 0

78 3.33

79 1.82

80 2.37

81 1.89

82 0

83 2.36

84 1.66

85 1.68

86 1.61

87 1.69

88 2.6

89 5.07

90 0

91 3.17

92 3.17

93 1.29

94 1.87

95 1.75

96 1.81

97 1.83

98 5.07

99 0

100 0

101 0

102 0

103 1.14

104 1.81

105 0

106 3.93

107 3.93

108 3.93

109 3.93

STATE

MODE

PIN NO.

LIC202

LIC203

LIC204

LIC205

LIC301

STATE

MODE

PIN NO.

15 0

16 3.34

17 5.19

18 3.42

19 3.43

20 0

21 3.34

22 0

23 0

24 5.04

25 1.51

26 0

27 5.08

28 0

29 3.43

30 5.07

31 3.43

32 3.43

33 3.35

343.32

353.32

363.32

373.33

383.31

393.32

40 3.32

41 3.32

42 0

43 3.32

44 3.34

45 3.32

46 3.32

47 3.32

48 3.32

49 3.32

50 3.32

51 0

52 3.85

53 0

54 3.31

55 0

56 0

57 0

58 0

59 0

60 0

61 0

62 0

63 0

64 0

65 0

66 0

67 0

68 0

69 0

STATE

MODE

PIN NO.

70 3.34

71 0

72 0

73 3.34

74 3.34

75 3.34

76 1.02

77 3.33

78 3.34

79 3.34

80 0

81 0

82 3.34

83 0

84 0

85 1.51

86 0

87 0

88 0

89 3.34

90 0

91 0

92 0

93 0

94 0

95 0

96 3.34

97 0

98 0

99 0

100 3.32

101 3.32

102 3.32

103 0

104 1.64

105 0

106 3.33

107 3.34

108 0

109 1.67

110 1.67

111 1.66

112 0.72

113 0

114 0

115 1.66

116 1.66

117 1.84

118 3.34

119 3.29

120 1.51

121 1.01

122 2.29

123 1.67

124 1.68

STATE

MODE

PIN NO.

125 1.68

126 1.67

127 1.67

128 0

129 1.7

130 3.34

131 1.7

132 1.47

133 1.83

134 1.68

135 1.62

136 0

137 2.9

138 1.51

139 0

140 0

141 0

142 0

143 0

144 0

145 0

146 0

147 0

148 3.34

149 3.34

150 3.34

151 0

152 3.32

153 0

154 0

155 3.34

156 0

157 3.34

158 3.34

159 0

160 3.34

161 3.34

162 1.64

163 1.4

164 1.21

165 0

166 1.31

167 2.79

168 1.31

169 0

170 0

171 3.34

172 3.32

173 1.28

174 3.24

175 0

176 0

177 0

178 0

179 1.51

STATE

MODE

PIN NO.

LIC302

LIC303

LIC304

STATE

MODE

PIN NO.

LIC501

STATE

MODE

PIN NO.

LIC502

STATE

MODE

PIN NO.

LIC504

STATE

MODE

PIN NO.

LIC505

LIC506

5-63 5-64

PRINTED CIRCUIT DIAGRAMS

1. MAIN P.C.BOARD

LOCATION GUIDE

5-65 5-66

2. MAIN P.C.BOARD

LOCATION GUIDE

VJW602CP'7_Allegro_COVER ABR521

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