EN9410e En9410 L9c Service Manual

User Manual: EN9410e

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L9CMonitor

Service Manual for the Envision EN9410

Feb, 18th, 2005 Revision: 1A

Issued By:
Checked By:
_____________________________________________________________________________
____
The release of this document is under control by the company. Any extra
copy of this document must be written permission by the product manager.

L9C service manual

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L9CMonitor
_____________________________________________________________________________
____

- Quanta Confidential –
History Page
Reversion
1A

Date
2/18/2005

Remark
Released.

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Content
Chapter
A. WARNING
B. SAFETY PRECAUTIONS
1. DIMENSIONS
2. GENERAL INFORMATION
3. SPECIFICATIONS
4. THEORY OF OPERATION
5. CONTROL LOCATION
6. NECESSARY EQUIPMENT LIST
7. BLOCK DIAGRAM
8. CONDUCTOR VIEW
9. SCHEMATIC DIAGRAM
10. EXPLODED VIEW
11. TROUBLE SHOOTING HINTS
12. REPLACEMENT PARTS LIST
13. AUTO BALANCE

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WARNING
This service information is designed for experienced repair technicians only and is
not designed for use by the general public
It does not contain warnings or cautions to advise non-technical individuals of
potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by
experienced professional technicians.
Any attempt to service or repair the product or products dealt within this service
information by anyone else could result in serious injury or death.

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SAFETY PRECAUTIONS
1. CAUTION:
No modification of any circuit should be attempted. Service work should only be performed after you are
thorough familiar with all of the following safety checks and servicing guide lines.
2. SAFETY CHECK
Care should be taken while servicing this LCD display. Because the high voltage is used in the inverter
circuit. These voltages are exposed in such areas as the associated transformer circuits.
3. POWER SUPPLY REQUIREMENTS
The external power converter for this display utilizes AC and DC cords. AC cord is detachable,
But DC cord is permanently attached. Any attempt to replace another adapter could result in serious
problem on the display.
4. LEAKAGE CURRENT HOT CHECK
4-1 Plug the AC cord directly into the AC outlet. Do not use an isolation transformer during this check.
4-2 Connect a 1500 ohm, 10 watt resistor, paralleled by a 0.15uF capacitor between each metallic part
and a good earth ground.
4-3 Use an AC voltmeter with 1000 ohm / volt or more sensitivity and measure the AC voltage across the
combination 1500 ohm resistor and 0.15uF capacitor.
4-4 Move the resistor connection to each exposed metallic part and measure the voltage.
4-5 Reverse the polarity of the AC plug in the AC outlet and repeat the above measurement.
4-6 Voltage measured must not exceed 1.5 volt RMS, from any exposed metallic part to the ground.

leakage current tester may be used in the above hot check, in which case any circuit measured must not
exceed 1 milliamp. In the case of a measurement exceeding the 1 milliamp value, a rework is required to
eliminate the chance of a shock hazard.
AC VOLTMETER

V
0.15u
.

To Metal Parts

1500

10W

Earth Ground

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1. DIMENSIONS (Unit:mm)
1.1 Front View (ID1)

1.2 Top View

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1.3 Rear View

1.4 Side View

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2. GENERAL INFORMATION
2.1. OUTLINE
This monitor is 19" multi-scan color LCD display with the following features OSD (on screen display)
control allows easy user adjustment . Power saving function, which helps saving energy, is also one of
the highlights of this model.

2.2. FEATURES
2.2.1 Power Saving
Built in Power Saving function based on VESA-DMPS standard. Power energy shall be saved
by controlling the circuit in accordance with power save signal from computer.
2.2.2 OSD (on screen display) function
OSD ( 3 Languages ) function is excellent and new man-machine interface.
Anyone is able to set up the picture as the like through OSD menu.
2.2.3 Self Test function
Self Testing picture comes out by pushing any key in the case of no-connection with computer
or power saving operation. This function shows if monitor is alive or not and can be used for self
aging test.
2.2.4 Ergonomic design
Low emission design to meet MPR II and TCO
2.2.5 Multi scan with digital technology
8 bit micro controller controls the circuit operation to meet with wide range signal of
Fh=31~83 kHz and Fv= 56~75 Hz. So VGA720x400, VGA640x480, SVGA800x600,XGA 1024x768,
SXGA 1280x1024 .
2.2.6 Factory preset
The product has 32 memory mode in total ,15 modes are preset and 17 modes are user
definable.
2.2.7 Fine dot pitch
LCD panel with a fine dot pitch (Horizontal: 0.294 mm / Vertical: 0.294mm)
2.2.8 Superior display performance
High contrast: 500: 1(Typical)
High brightness: 250 cd / m2 (Typical)
Wide view angle: 140/ 130degrees (H/V)
2.2.9 Special function
VESA DDC2B (Display Data Channel) Compatible

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3. SPECIFICATION
3.1. Outline
3.1.1 Front Indication: POWER SW, LED (Green/Amber), UP, Down, LEFT, RIGHT, Set/Auto and
MENU key are located on the front panel.
3.1.2 Video signal cable connector, and DC inlet are located on the backside cabinet.
3.1.3 OSD menu includes the following function. CONTRAST, BRIGHTNESS, H.POSITION,
V.POSITION
COLOR-TEMPERATURE, CLOCK, PHASE, LANGUAGE, VOLUME, POWER-ON-RECALL
3.1.4 CONTRAST and BRIGHTNESS can be directly controlled with UP / Down key.
3.1.5 VOLUME can be controlled with LEFT / RIGHT key.
3.2. MECHANICAL SPECIFICATIONS
3.2.1 Dimension

Height: 437mm
Width: 426mm
Depth: 198mm

3.2.2 Net Weight:

5.0 kg

3.2.3 Maximum Viewable Area: Diagonal 482.6mm(19")
3.3. PANEL SPECIFICATIONS

Part No.

CLAA190EA03

Driver bit of panel

8bit + dithering

Contrast ratio

500:1

Brightness

250 cd/ m2

Pixel pitch

0.294 mm

Response time

Typical 16 ms

View angle

70/70/70/60degree

Color coordinate

x=0.313,y=0.329

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3.4. CONNECTORS
3.4.1 AC inlet : CEE22 typed connector
3.4.2 Attached video signal cable connector x 1

Shell

5
10

6
11 12 13

14 15

Figure 3.4

Signal Name

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Red video
Green video
Blue video
Ground
Ground
Red ground
Green return
Blue return
N/C
Ground
Ground
SDA (serial data)
Hsync
Vsync (VCLK)
SCL (serial clock)

Signal cable input connector.

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3.5. ELECTRICAL SPECIFICATIONS

3.5.1 Standard conditions
Display area (HxV)

378.3*303mm

Video signal level

0.7 Vpp

Contrast

Max.

Brightness

Max.

Ambient Temperature

25 +/- 5 C degrees

Input voltage

Universal power

Warming up time

At least 30
1280 x 1024

Display mode

3.5.2 POWER
3.5.2.1 Power supply
AC-DC adapter
Input voltage
Input current
Frequency range

100-240V
Max. 0.8Arms
47 - 63 Hz

Inrush current

Shall be less than the ratings of critical components
(Including fuse, rectifiers and surge limiting device)
for all conditions of line in voltage.

Maximum power consumption:

50 Watts

3.5.2.2 Power Management
MODE

H-SYNC

V-SYNC

COLOR OF
POWER LED

POWER

RECOVERY TIME

CONSUMPTION

Active

Green

< 50 Watts

Off

Inactive

Amber

< 1 Watts

< 5 seconds

At first power on w/o signal LED will be green blinking + message on screen.

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3.5.3 Signal level and input impedance
3.5.3.1 Video Signal level
This LCD display is adjusted at the factory using 0,7 Vp-p Video signal.
3.5.3.2 Sync Signal level
H/V Separate: TTL level
3.5.3.3 Input impedance
Video input: 75 ohms +/- 1%
Sync input: > 1 k ohms
3.5.4 Display Area
Display area: 378.3*303mm

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3.5.5 Preset Timings
The product has 32 memory modes in total. 15 modes are preset and 17 modes
are user definable.

Format

Pixel Clock(MHz)

640x350@70Hz

720x400@70Hz

640X480@6 640x480@7 640x480@7
0Hz

2Hz

5Hz

25.176

28.320

25.175

31.500

Frequency(KHz)

31.470

31.467

31.469

37.861

37.500

Total Time(pixels)

800

900

800

832

840

Display Time(pixels)

640

720

640

Sync Width(pixels)

108

Back Porch(pixels)

120

Front Porch(pixels)

Blank time(pixels)

160

180

144

176

200

70.089

70.082

59.940

72.809

75.00

Total Time(lines)

449

525

520

500

Display Time(lines)

350

400

480

Sync Width(lines)

Back Porch(lines)

Front Porch(lines)

Blank time(lines)

Horizontal
Sync Polarity

Vertical
Sync Polarity
Frequency(Hz)

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800x600@56Hz

800x600@60Hz

800x600@72Hz

800x600@75Hz

36.000

40.000

50.000

49.500

Frequency(KHz)

35.156

37.879

48.077

46.875

Total Time(pixels)

1024

1056

1040

1056

Display Time(pixels)

800

128

120

Back Porch(pixels)

128

160

Front Porch(pixels)

Blank time(pixels)

224

256

240

256

56.250

60.317

72.188

75.000

Total Time(lines)

625

628

666

625

Display Time(lines)

600

Sync Width(lines)

Back Porch(lines)

Front Porch(lines)

Blank time(lines)

Format
Pixel Clock(MHz)
Horizontal
Sync Polarity

Vertical
Sync Polarity
Frequency(Hz)

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10
Format
Pixel Clock(MHz)

1024x768@60Hz

1024X768@70Hz 1024X768@72Hz

13
1024X768@75Hz

65.00

75.000

78.000

78.750

Frequency(KHz)

48.363

56.476

58.036

60.023

Total Time(pixels)

1344

1328

1344

1312

Display Time(pixels)

1024

Horizontal
Sync Polarity

1024
Sync Width(pixels)

136

132

Back Porch(pixels)

160

144

164

176

Front Porch(pixels)

Blank time(pixels)

320

304

320

288

60.004

70.069

71.916

75.029

Total Time(lines)

806

807

800

Display Time(lines)

768

Sync Width(lines)

Back Porch(lines)

Front Porch(lines)

Blank time(lines)

Vertical
Sync Polarity
Frequency(Hz)

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1280x1024@60Hz

1280x1024@75Hz

108.000

135.000

Frequency(KHz)

63.981

79.976

Total Time(pixels)

1688

Display Time(pixels)

1280

Sync Width(pixels)

112

144

Back Porch(pixels)

248

Front Porch(pixels)

Blank time(pixels)

408

60.020

75.025

Total Time(lines)

1066

Display Time(lines)

1024

Sync Width(lines)

Back Porch(lines)

Front Porch(lines)

Blank time(lines)

Format
Pixel Clock(MHz)

Horizontal
Sync Polarity

Vertical
Sync Polarity
Frequency(Hz)

: H-Total

: V-Total

: H- Sync width

: V- Sync width

: H- Back porch

:.V- Back porch

: H- Video width

: V- Video width

: H- Front porch

:.V- Front porch

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3.5.6 General performance
3.5.6.1 Maximum pixel clock
135 MHz
3.5.6.2 Maximum luminance
Test conditions: 100% all white pattern, brightness set to Maximum
typical: 250 cd/m2
min :

200cd/m2

3.5.6.3 Brightness variation
Value

75 % Variation (C / A x 100)

Conditions

Display image: Full white
Brightness : Maximum
Contrast : Maximum
A: Luminance at center position

3.5.6.4 Contrast ratio (CR)
Value

CR= B / A

Conditions

Contrast : Maximum
Brightness : max
B: Full white pattern
A: Full black pattern

3.6. ENVIRONMENTS

The environmental conditions are in accordance to IEC 721
Operating:
Temperature:
Humidity:

0°C - +40° C
20% - 80% non–condensing

Height:

3658 m

Air pressure:

700 - 1060 mbar

Storage (unpacked)
Temperature:
Humidity:

-20°C - +60° C
8% - 95% non–condensing

Height:

12193 m

Air pressure:

700 - 1060 mbar

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Transport (packed)
Temperature:
Humidity:
Height:

-20°C - +60° C
8% - 95% non–condensing
12000 m

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3.7. REGULATORY STANDARDS
3.7.1 Safety standards
This monitor applies to various safety & EMI standards May refer to the logo label
3.7.2 EMC standards
FCC part 15,subpart B , class-B (EMV) CE marking
3.8. OTHERS
UL, cUL,
3.9. P0WER CORD
Northern Hemisphere Version: UL / CSA
approved power cord.
European: VDE approved power cord.
3.10. SIGNAL CABLE
Signal cable with Mini D-Sub 15P connectors. Length: 1.8 meter.
3.11. RELIABILITY
> 30000hrs (demonstrated MTBF)

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4. THEORY OF OPERATION
This section describes the function of the LCD monitor per functional block.
L9EA monitor includes MB Board (including audio board function inside), power board and button board.
4.1 MB BOARD
The MB board is a two-layer, single-landed design with ground and ground planes provided.
The VGA cable is a signal cable that contains video signal, sync signal and DDC signal from PC VGA
adapter This system board consists of 3 functional areas : flat panel controller, Micro controller and
audio controller.
4.1.1 Flat panel controller… Mstar TSU16AK (U3)

The heart of the system board is Mstar TSU16AK. The TSU16AK is a graphics processing IC for
LCD monitor. It provides some control functions required for LCD panel. On-chip functions include a
high-speed triple-ADC , PLL, high sacling engine and OSD controller.
a) Clock Generation :
Crystal Input Clock (XTALI and XTAL). This is the input pair to an internal crystal oscillator and
corresponding logic. A 14.318 MHz crystal is recommended.
b) Hardware Reset ( Pin 32 )
Hardware Reset signal is generated by MTV312 (U5/Pin 26).It assert a reset signal at least 1 ms.
c) Analog to Digital Converter
The TSU16AK chip has three ADC's (analog-to-digital converters), one for each color (red,
green and blue) . The analog RGB signals are connected to TSU16AK as described below

Pin Name

Pin Number

Red +

Red -

Green +

Green -

Blue +

Blue -

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d) OSD :
The TSU16AK has a fully programmable, high-quality OSD controller. The on-chip
Static RAM (256 different fonts at size of 12X18) stores the cell map and the cell
definitions.
e) Inverter Brightness control (PWM0) (Pin 73)
The TSU16AK has one PWM output PWM0(Pin73) to control Inverter Brightness
Range.
f) Panel LVDS interface (Pin 102~103, Pin106~113, Pin118~125, Pin128, Pin1)
The TSU16AK driver interface is highly programmable. It supports LVDS port for
panel.

4.1.2 Micro controller……MTV312 (U5)

The MYSON MTV312 microcontroller serves as the system microcontroller.That is , it programs the
TSU16AK and manages other devices in the system such as the keypad, the backlight, LED and
audio
general purpose input/output pins.
Pin number
23
22
16
21
41
9
25
24
29
28
19
18
20
26
42
37
40
36
3

Pin name
P1.5
P1.4
P6.2
P1.3
P5.4
P6.3
P1.7
P1.6
P3.0/RXD/HSCL
P3.1/TXD/HSDA
P3.2/INT0
P1.1
P1.2
P6.1/AD1
P5.3
P4.1
P5.5
P4.0
P5.0

L9C service manual

Pin function
Key-Sel/Auto
Key-Menu
Key-Left
Key-Power on/off
LED-Green
Key-Right
Key-Down
Key-Up
SCL-VGA/RxD(Debug)
SDA-VGA/Txd(Debug)
INT
SDA(Debug)
SCL(Debug)
RESET
LED-Orange
Audio-Mute
Audio-Stby-Power
Inverter On/Off
Panel power On/Off

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4.2

Power Module
The power module includes an Inverter and Power regulator. The electrical specification
described as following:

4.2.1 Power Characteristics.

Input

Rated Input Voltage

90~240 Vac,50/60Hz

Operation Input Voltage Range

90~264 Vac,47~63Hz

Max Input AC Current

< 1.2A

Efficiency

12Vdc load 3.5A
Brightness Voltage from 0.3~3Vdc
ON/OFF Voltage : High(3.3Vdc)/Low(0Vdc)

Output

Brightness Voltage(Vadj)

0.3Vdc(Max) ~ 3Vdc(Min)

On/Off Voltage

High(3.3Vdc)/Low(0Vdc)

Static Output Characteristics

12V/3.5A Output : 11.4Vdc ~ 12.6Vdc

4.2.2 Inverter output characteristics.

Rated Output Kick-off Voltage

1500 ~ 2000 Vrms

Rated output Voltage

720Vrms

Rated Output Frequency

40 ~ 60 Khz

Rated Output Current per tube

7mArms

4.2.4 Power module of connector definition ;
CN110 ;

Pin 1 & 2 ----> Vdc Output ( 12V +/- 5%)
Pin 3 & 4 ---------> GND
Pin 5 ---------> Brightness Control Voltage
Pin 6 ---------> On /Off ( "High" set Lamp on )

CN1 ~ CN4 ;

Pin 1 ---------> HV ( High Voltage for CCFL )
Pin 2 ---------> Return ( Low Voltage for CCFL )

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5 CONTROL LOCATION

Button Define
1

OSD Menu

Trigger OSD Main Menu / Clear OSD

1. Select OSD Main Menu Item
2. Trigger Brightness/Contrast Menu.

DOWN

1. Select OSD Main Menu Item
2. Trigger Brightness/Contrast Menu.

POWER

LEFT

1. Decrease Menu Item value
2. Trigger Volume Menu.

RIGHT

1. Increase Menu Item value
2. Trigger Volume Menu.

SELECT/ AUTO

Switch Power ON/OFF

1. Switch OSD Main Menu focus status.
2. Perform Auto configuration.

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LED Status

Color
Green

Status Description
Normal status
Enter Sleep Mode status or use “Power + Auto” key

Amber

enter factory mode

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Dialog Overview
OSD Main Menu
When user press the Menu key under none
OSD status will trigger this menu appear for
detail parameters adjust. This menu will
display about 20 seconds if no one press
other key, otherwise will refresh display
time length.

Brightness/Contrast Menu

When user press the Up or Down keys
under none OSD status will trigger this
menu appear for Brightness and
Contrast adjust. This menu will display
about 20 seconds.

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Auto Configuration
When user press the select/Auto key
under none OSD status will trigger this
dialog appear and perform Auto
Configuration procedure.

Mode Information
When Display timing changed this dialog
will appear about 3 seconds. And this
feature only enable when “Information”
indicate On in OSD’s other page of main
menu.

No Signal

When user does not support the video signal
from the cable this dialog will appear about
10 seconds. And then enter the Sleep mode.
One special case was in factory mode, the
display time length will become 5 seconds for
testing the power consumer.

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Out Of Range

When user input the video signal out of spec
this dialog will appear about 10 seconds. And
then enter the Sleep mode.

OSD Main Menu
Brightness & Contrast Adjustment

Brightness (Up&Down):
Adjust the brightness of the display.
Contrast

(Left&Right):

Adjust the difference between the light
and dark areas.

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Tracking Adjustment

CLOCK:
Adjust to minimize any vertical bars or stripes
visible on the screen background. The horizontal
screen size will also change.
PHASE:
Adjust to remove any horizontal distortion, and
clear or sharpen the image of characters.

Position Adjustment

V-Position:
Adjust the vertical position of the picture.
H-Position:
Adjust the horizontal position of the picture.

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Color Adjustment

There are four items for color
adjustment:
9300K: Bluish white
6500K: Reddish white
User defined:
Red, Green, Blue. Adjust to set your
own color level.

Other
LANGUAGE:
Multi- Language selection
OSD POSITION:
Adjust the OSD window position on the screen.
INFORMATION:
Display Information Dialog or not when input timing
changed.
RESET: Recall to factory settings.

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Factory1 Adjustment

This page only visible in factory mode
R,G,B OFFSET :
Adjust current RGB cut off level
R,G,B GAIN :
Adjust current RGB Driver value.
SSPLL and SSMOD :
Adjust chip set internal frequency spread effect for EMI
testing.

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Factory2 Adjustment
This page only visible in factory mode
AUTO BURN :
Use the chip set internal pattern for hot running monitor
panel and inverter.
AUTO COLOR :
Perform Auto Balance measurement .
AUTO COLOR 1 :
Perform Auto Balance measurement by chip set internal
signal. And reference these values to initial all other
color temperature detail parameters.
COLOR UPDATE :
Force presently R,G,B offset and gain parameters
update to currently temperature memory address.
FACTORY RESET :
Recall to factory setting and power off immediately.
VERSION :
Display F/W version.

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6. NECESSARY EQUIPMENT LIST

1
2
3
4
5
6

Item
Personal Computer with Windows 98/95
Luminance Meter Minolta CA 110
Video Generator : Chroma 2000,2135,2250 or equivalent
Color Analyzer : Minolta CA110 , Chroma or equivalent
Watt / Power Meter
10 Times Magnifier

7 Ruler /Template
8 Thickness gauge

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7. BLOCK DIAGRAM
7.1 Power module

To Panel lamp

Inverter
Output

Voltage
Output

12V/3.25A

Power Module

AC Input
90 ~ 264V

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7.2 Main Board

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8. CONDUCTOR VIEW
Main Board Silkscreen

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Power Board Silkscreen

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Button Board Silkscreen

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9. SCHEMATIC DIAGRAM Main Board

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Power Board Circuit

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10.EXPLODED VIEW

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11 TROUBLE SHOOTING HINTS
1.No power
No Power

Check Power Module

Output CN110

Change Power Board

Pin 1,2 = 12V?

Check Scalar Module

Change Cable

Output CN6

From(Power module)CN110 to (Scalar/B)CN6

Pin 1,2 = 12V?

Check Power Button
From Scalar/B(CN4)
to Button/B(CN1)

Check Cable

YES

Open?

Change Cable

Change Switch or Button Board

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L9C Monitor
2.No Characters , Missing one color
No Characters or Missing one

Check CN6 12V Output

Change Power Board

OK
Check L33 , 5V Output

Check or Change U21,Q13,Q17

OK
Check L34 , 2.5V output

Check or Change U22

Change Power Board

OK
Check L31 , 3.3V output
Check Inverter
NO

Check or Change U23

From Power

Check CN9 to Panel Signal Output

board OK?

OK
NO

Check X’Tal 11.059Mhz and 14.318Mhz

Check or Change Cable or Panel

Change X1 or X2

OK
Change VGA Cable

Check H,V SYNC?

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L9C Monitor
12. REPLACEMENT PARTS LIST( See appendix)

13.Auto White Balance Procedure

Connect signal to monitor. The display signal need contain real black and full white.

Press "Auto" button(don't release) when power ON(LED display Amber).

Press OSD select FACTORY 2, Auto Color, RUN(For AD converter calibration on R, G and B gain, offset).

4
5

Select Color Update, RUN.
Press OSD select COLOR into 6500 and check by color analysis (If adjustment Press OSD select FACTORY 1 for
Adjust the R, G, B gain. Please make color update when finished adjustment on 6500)

Press OSD select COLOR into 9300 and check by color analysis (If adjustment Press OSD select FACTORY 1 for
Adjust the R, G, B gain. Please make color update when finished adjustment on 9300)
Please make sure that Brightness set 100, Contrast set 80 when adjust(factory default).
The adjustment result needs to be checked by Color Analysis like CA110, the input signal 0.7V

and full white pattern while on check.

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EN9410e En9410 L9c Service Manual

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