ALPHA 10/10P SERVICE MANUAL AV50 Arcam 10P Pwr Sm

User Manual: ALPHA AV50

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ALPHA 10/10P SERVICE MANUAL

ALPHA 10/10P SERVICE MANUAL
CIRCUIT DESCRIPTION
The mother PCB is common for both the A10 and A10P with the exception of the input mode switch and pre-amp
output mute relay which are only fitted to the A10 and the power/standby LED and links to parallel the input
connections to what would otherwise be the pre-amp output for use with a mono link. The amplifier is based on the
D290/Alpha 9 design but with lower gain, a higher current and higher voltage driver stage and a high power output
stage. The current servo has been improved over the Alpha 9 to be output device independent. A micro supervises
the amplifier state, switch state and remote control functions. Provision is made for an additional 3rd channel PCB to
be added with power supply and protection circuitry access.
Input stage
The input connections are taken either from the pre-amp connector, LK12X, or the external power amp input on the
A10 depending on the position of SW1. On the A10P, the input is taken from the external power amp input only with
provision for a mono shorting link by having two parallel input connectors. On the A10, there is a mute relay on the
pre-amp outputs which are always connected to the pre-amp connector, LK12X.
The signal is passed through a low pass filter with a -3dB point of 550KHz at normal gain and 740KHz at low gain.
The gain is selected by SW2. C72 and C74 are d.c. blocking capacitors with a -3dB point of 0.7Hz. A d.c. error
correction current is injected into the base of Q19 and 26 from the voltage servo Z3 and 4, to null any voltage offset at
the amplifier output.
The input and voltage amplifier stages both run off regulated 15 Volt suppies. The input stage is an NPN differential
input, Q18, 19, 25 and 26, with an adjustable current source, Q21 and 28 which sets the quiescent current through all
the stages but specifically the output stage. C37, R58, C49 and R66 keep the input stage and voltage amplifier stable.
Q52, 53, 54 and 55 form a current mirror to ensure that the differential input is balanced during normal operation.
Voltage Amplifier
The voltage amplifier consists of another differential pair, Q48, 49, 50 and 51. Q48 and 50 are the positive pulling side
of the voltage amplifier output and Q49 and 51 pull negative via a current mirror Q8, 9, 10 and 11. The network C12,
36, R74 and 77 give the current mirror gain to compensate for the fact that Q49 and Q51 is only driven from the lowimpedance side of the input stage current mirror. The network ensures a fast, symmetrical slew rate of the voltage
amplifier stage.
Network C69, 70, R172, 174 ensure the overall stability of the amplifier by reducing the open loop gain at high
frequencies.
Second Voltage Amplifier and Driver Stage
Q33, 36, 41 and 44 are the next voltage amplifier stage with feedback applied from the output coupled to their
emitters. This stage runs on the full supply rail voltages and splits the level shifts the signal via Q2, 3, 5 and 6 to drive
the gates of the output MOSFETs, Q13, 14, 15 and 16. Q2 and 3 simply buffer the inverted signal at the collector of
Q36 to drive the low side MOSFETs, Q13 and 15. Q5 and 6 invert the inverted signal at the collector of Q41 and Q44
to drive the high side MOSFETs, Q14 and 16. To ensure that the high side drive is able to swing far enough to ensure
the high side MOSFETs can be driven to saturation, a bootstrap, C5, D41 R57, C78 and D22 boosts the driver stage
power supply during positive excursions of the amplifier output. This is inactive at low output voltage swings as any
distortion induced by the network would be more audible at such levels.
Output Stage
Both the high and low side output devices feature over-current protection, Q17, 23, 24, 30 which clamps the gate of
the MOSFET it protects. A high current is permitted through the MOSFET for a few milliseconds after which time the
current is throttled down to about 10A peak. A second current sensing network, Q32 and Q35 activates the
over-current protection cut-out if the low side is current limiting for too long, a few hundred milliseconds. The current
sensing resistors do not reduce the transconductance of the MOSFETs because the driver stage is referenced to the
MOSFET source. This means that the current through the driver stage is also sensed but this is insignificant as fas as
over-current protection sensing is concerned.
Auto-bias

1

ALPHA 10/10P SERVICE MANUAL

Figure 1Block Diagram of Power Amplifier
The bias is regulated in two modes, one where these is no signal and one when signal is being split between the high
and low side MOSFETs when driving a alternating signal into a load.
Under static conditions, Z8 simply compares the sensed current, which includes the driver stage current, with a d.c.
mode reference of 13mV. The sense resistor is 0.11 so this corresponds to a current of about 120mA, some of which
is driver current. The current through the MOSFETs is about 80mA at this point. The comparator output is level shifted
to drive the integrating current servos Z3 and 4. This adjusts the amplifier current so that, on average, the bias level is
held at the reference point.
Under dynamic conditions, the low side drive will definitely be conducting more current than the reference (80mA) for
half the signal cycle and will be switched off for the other half. The result is a rectangle wave output from the
comparator, Z4.
When the output stage is biassed correctly (class AB operation) the comparator output toggles when the current
through the sense resistor for the -ve MOSFET is equal to the d.c. mode static reference level and at the half way
point of the signal. The result is a perfect square wave output from the comparator. Under these conditions, the +ve
MOSFET is also conducting the same amount of current at this point. If the bias level is lower than the reference, say,
at zero (class B operation) then the -ve MOSFET will spend slightly less than half the time conducting at or above the
reference level resulting in a rectangle wave output from the comparator at a duty cycle slightly less than 50%. If the
bias level is higher than the reference then the -ve MOSFET will spend slightly more than half the time conducting at
or above the reference level resulting in a rectangle wave output at a duty cycle slightly more than 50%. The change
in duty cycle away from 50% causes the integrator, Z3 and Z4 to adjust the bias level via the bias adjusting
transistors, Q22 and 29.
The integrator has a reference, the a.c. mode dynamic reference, for a bias point slightly higher than for a 50% duty
cycle. This eliminates the possibility of the bias being slowly throttled due to component tolerance mismatch resulting
in a reference which would pull the servo down. A high dynamic bias reference level simply stabilises the bias slightly
higher than the static reference but a low dynamic reference causes the bias to drift down to complete throttle.
This system works if the signal is a.c., symmetrical and is not a rectangle wave. Certainly, only a.c. signals are passed
Sense Resistor

-ve MOSFET
Measured Current (blue)

Other MOSFET

Comparitor Output

49%

50%

Bias correct

Under Biassed

Figure 2 Auto-bias under dynamic conditions
2

52%

Over Biassed

ALPHA 10/10P SERVICE MANUAL

through the amplifier due to C72 and 74 d.c. blocking capacitors and on average the signal will be symmetrical. Any
short-term asymmetry will be ironed out by the long time constant of the integrator.
Main Power Supply
The main power supply is regulated in two stages. First it is pre-regulated by Q1 and 4 to about 11V less than the
main supply rails. This supply is made available to an option board. The maximum load on these supplies is 150mA
for less than 2W dissipation in Q1 and 4. These supplies are then regulated to +/-15V by Z1 and 2. These supplies are
used by the input stages of the power amplifiers including any 3rd channel board, the pre-amplifier board and an
optional phono amplifier board. The positive voltage regulator, Z1, has a larger heatsink than Z2 because the phono
board consumes much more current from the positive rail than from the negative rail.
Control Micro
The control micro performs the following functions...
‚
Switches the amplifier on or off,
‚
Mutes the speakers #1 or #2 or the pre-amp output,
‚
Monitors the heatsink temperature,
‚
Monitors RF content of speaker outputs,
‚
Handles the remote bus and infra red remote input,
‚
Reports fault conditions to the main display and LED,
‚
Reads the speaker and power switch positions.
The control micro runs of the constant power supply from standby transformer, TX2. This enables the amplifier to be
switched on or off remotely from the remote bus or, in the case of the integrated amplifier, from an infra red remote
control. This power supply is intended to supply all the digital circuitry in the amplifier including any option boards.
This is supplied at 8V to the other boards where it will be locally regulated to 5V as required.
The micro communicates with the display board via a multi-master I2C bus. This bus is used to report amplifier and
power status to the display micro and remote control commands received. It is also possible for the display micro to
control functions on the power amplifier board. The option board also uses this bus to receive any remote control
commands and communicate with the display micro.
The external remote bus handles raw information from infra red sensors with no demodulating. The remote bus input
can be echoed to the output through a buffer circuit. The incoming signal is demodulated by Z13. Raw signal is also
sent to the micro interrupt line, pin 12, for assessing the noise on the remote bus. In addition, any d.c. signal on the
remote bus is sensed on pin 2 of the micro in when it is not being used as an output to mute the hardware remote
echo buffer. The micro must modulate any output it sends to this bus with a carrier (37KHz). The output will drive one
or two series infra red LEDs directly.
The list below shows how various fault conditions can be deduced simply from the Power LED behaviour.

Figure 3 Micro Block Diagram

3

ALPHA 10/10P SERVICE MANUAL

•

On power up, the protection should be engaged. This is checked after 3 seconds on pin 9 of Z9. If it isn't
happening, the unit shuts down with flashing red.
If the protection does not clear after about 16 seconds on power-up the unit shuts down to flashing red. This
is usually caused by a voltage offset.
Any main amp power loss detected on pin 26 after power-up causes a shut down to flashing red.
Any RF detected on pin 3 results on immediate shut down to flashing red.
Any protection fault detected after power up on pin 9 results in a flashing amber LED for about 16 seconds
max. If it has not cleared by then the unit is shut down to flashing red. Protection faults are caused by voltage
offset or over-current. Over-current should latch resulting in a shut down after 16 seconds. Voltage offsets
should clear themselves if brief.
A temperature fault on pin 25 results in the power LED flashing slow amber and can last indefinitely until it
clears. When it clears the flashing will speed up until the protection times back in.

•
•
•
•

•

ALPHA 10P POWER AMP MAIN BOARD PARTS LIST
Ref No.

Description

Part No

C31

MLC 100N 50V X7R 10% SM

2C410

C1

ELST 100U 100V

2N710B

C32

ELST 22U 63V

2N622

C2

ELST 100U 100V

2N710B

C33

ELST 22U 63V

2N622

C3

MLC 100N 50V X7R 10% SM

2C410

C34

MLC 100N 50V X7R 10% SM

2C410

C4

ELST 100U 100V

2N710B

C35

PPRO 150P 5% 63V RA

2D115

C5

ELST 100U 100V

2N710B

C36

PPRO 4N7 63V 5% RA

2D247N

C6

ELST 22U 63V

2N622

C37

PPRO 1N0 5% 63V RA

2D210

C7

ELST 10U 50V

2N610

C38

PPRO 680P 63V 5% RA

2D168

C8

ELST 22U 63V

2N622

C39

PPRO 680P 63V 5% RA

2D168

C9

ELST 10U 50V

2N610

C40

MLC 10N 50V X7R 10% SM

2C310

C10

ELST 10U 50V

2N610

C41

MLC 10N 50V X7R 10% SM

2C310

C11

ELST 1U0 50V

2N510

C42

MLC 10N 50V X7R 10% SM

2C310

C12

PPRO 4N7 63V 5% RA

2D247N

C43

MLC 10N 50V X7R 10% SM

2C310

C13

SUPPR CAP 4N7 250V

2K247

C44

SUPPR CAP 4N7 250V

2K247

C14

PPRO 150P 5% 63V RA

2D115

C45

ELST 10U 50V

2N610

C15

ELST 10U 50V

2N610

C46

SUPPR CAP 4N7 250V

2K247

C16

ELST 10U 50V

2N610

C47

SUPPR CAP 4N7 250V

2K247

C17

ELST 10U 50V

2N610

C48

ELST 3M3 25V

2N833

C18

ELST TNC 10m 63V RA 40mm

2N910A

C49

PPRO 1N0 5% 63V RA

2D210

C19

ELST TNC 10m 63V RA 40mm

2N910A

C50

ELST 1U0 50V

2N510

C20

PPRO 4N7 63V 5% RA

2D247N

C51

ELST 220U 16V

2N722

C21

PPRO 4N7 63V 5% RA

2D247N

C52

ELST 220U 16V

2N722

C22

ELST 100U 25V

2N710

C53

ELST 220U 16V

2N722

C23

ELST 100U 25V

2N710

C54

ELST 220U 16V

2N722

C24

ELST 100U 25V

2N710

C55

PCRB 100N 100V 10% RA 5mm

2H410

C25

ELST 100U 25V

2N710

C56

PCRB 100N 100V 10% RA 5mm

2H410

C26

ELST 100U 25V

2N710

C57

PCRB 100N 100V 10% RA 5mm

2H410

C27

ELST 100U 25V

2N710

C58

PCRB 100N 100V 10% RA 5mm

2H410

C28

MLC 470P 100V NPO 5% SM

2C147

C59

PCRB 100N 100V 10% RA 5mm

2H410

C29

MLC 470P 100V NPO 5% SM

2C147

C60

PCRB 100N 100V 10% RA 5mm

2H410

C30

MLC 470P 100V NPO 5% SM

2C147

C61

PPRO 100P 63V 5% RA

2D110N

4

ALPHA 10/10P SERVICE MANUAL

C62

PPRO 100P 63V 5% RA

2D110N

D5

ZENER 10V 400MW

3C11004

C63

PPRO 150P 5% 63V RA

2D115

D6

ZENER 10V 400MW

3C11004

C64

PPRO 330P 5% 63V RA

2D133

D7

ZENER 10V 400MW

3C11004

C65

PPRO 150P 5% 63V RA

2D115

D8

ZENER 10V 400MW

3C11004

C66

PPRO 330P 5% 63V RA

2D133

D9

ZENER 10V 400MW

3C11004

C67

PEST 15N 63V 5%

2K315

D10

RECTIFIER 6A40 6A 400V

3B6A40

C68

PEST 15N 63V 5%

2K315

D11

RECTIFIER 6A40 6A 400V

3B6A40

C69

PSTY 56P 160V ENCAP 1PF%

2F056

D12

RECTIFIER 6A40 6A 400V

3B6A40

C70

PSTY 56P 160V ENCAP 1PF%

2F056

D13

RECTIFIER 6A40 6A 400V

3B6A40

C71

ELST NON POLAR 10UF 35V

2U610

D14

RECTIFIER 1N4003F 1A 200V

3B4003

C72

ELST NON POLAR 10UF 35V

2U610

D15

RECTIFIER 1N4003F 1A 200V

3B4003

C73

ELST NON POLAR 10UF 35V

2U610

D16

SSDIODE 1N4148 75V

3A4148

C74

ELST NON POLAR 10UF 35V

2U610

D17

SSDIODE 1N4148 75V

3A4148

C75

PEST 47N 63V 10%

2K347

D18

RECTIFIER 1N4003F 1A 200V

3B4003

C76

PEST 47N 63V 10%

2K347

D19

RECTIFIER 1N4003F 1A 200V

3B4003

C77

PEST 47N 63V 10%

2K347

D20

SSDIODE 1N4148 75V

3A4148

C78

PEST 47N 63V 10%

2K347

D21

RECTIFIER 1N4003F 1A 200V

3B4003

C79

ELST NON POLAR 10UF 35V

2U610

D22

RECTIFIER 1N4003F 1A 200V

3B4003

C80

ELST NON POLAR 10UF 35V

2U610

D23

RECTIFIER 1N4003F 1A 200V

3B4003

C81

MLC 22P 100V NPO 5% SM

2C022

D24

RECTIFIER 1N4003F 1A 200V

3B4003

C82

MLC 22P 100V NPO 5% SM

2C022

D25

RECTIFIER 1N4003F 1A 200V

3B4003

C83

ELST 100U 25V

2N710

D26

SSDIODE 1N4148 75V

3A4148

C84

MLC 100N 50V X7R 10% SM

2C410

D27

RECTIFIER 1N4003F 1A 200V

3B4003

C85

MLC 100N 50V X7R 10% SM

2C410

D28

SSDIODE 1N4148 75V

3A4148

C86

MLC 100N 50V X7R 10% SM

2C410

D29

ZENER 4V7 400MW

3C04704

C87

MLC 100N 50V X7R 10% SM

2C410

D30

SSDIODE 1N4148 75V

3A4148

C88

MLC 100N 50V X7R 10% SM

2C410

D31

SSDIODE 1N4148 75V

3A4148

C89

MLC 100N 50V X7R 10% SM

2C410

D32

SSDIODE 1N4148 75V

3A4148

C90

ELST 10U 50V

2N610

D33

SSDIODE 1N4148 75V

3A4148

C91

PPRO 680P 63V 5% RA

2D168

D34

SSDIODE 1N4148 75V

3A4148

C92

MLC 10N 50V X7R 10% SM

2C310

D35

SSDIODE 1N4148 75V

3A4148

C93

MLC 1N0 50V X7R 10% SM

2C210

D36

SSDIODE 1N4148 75V

3A4148

C94

MLC 10N 50V X7R 10% SM

2C310

D37

SSDIODE 1N4148 75V

3A4148

C95

ELST 10U 50V

2N610

D38

SSDIODE 1N4148 75V

3A4148

C96

ELST 10U 50V

2N610

D39

ZENER 12V 3W SM

3C03C12

C97

MLC 100N 50V X7R 10% SM

2C410

D40

SSDIODE 1N4148 75V

3A4148

C98

MLC 10N 50V X7R 10% SM

2C310

D41

ZENER 12V 3W SM

3C03C12

C99

CERD 10PF 63V 10%

2A010

D42

SSDIODE 1N4148 75V

3A4148

C100

CERD 10PF 63V 10%

2A010

D43

ZENER 5V6 400MW

3C05604

D1

ZENER 15V 400MW

3C11504

D44

ZENER 24V 3W SM

3C03C24

D2

ZENER 15V 400MW

3C11504

D45

RECTIFIER 1N4003F 1A 200V

3B4003

D3

ZENER 10V 400MW

3C11004

D46

SSDIODE 1N4148 75V

3A4148

D4

ZENER 10V 400MW

3C11004

D47

SSDIODE 1N4148 75V

3A4148

5

ALPHA 10/10P SERVICE MANUAL

D48

ZENER 4V7 400MW

3C04704

Q10

TRANS LF SS N SM BC846B

4A846B

D49

SSDIODE 1N4148 75V

3A4148

Q11

TRANS LF SS N SM BC846B

4A846B

D50

ZENER 5V6 400MW

3C05604

Q12

TRANS LF SS N SM BC847B

4A847

F4

FUSE 20mm 2.5A AS

C12256

Q13

TRANS POWER MOSFET IRPF360LC

4K360

F4

INS COVER PCB FUSEHOLDER

F022

Q14

TRANS POWER MOSFET IRPF360LC

4K360

F4

FUSEHOLDER 20mm PCB

8S004

Q15

TRANS POWER MOSFET IRPF360LC

4K360

F5

FUSEHOLDER 20mm PCB

8S004

Q16

TRANS POWER MOSFET IRPF360LC

4K360

F5

INS COVER PCB FUSEHOLDER

F022

Q17

TRANS LF SS N SM BC849B

4A849B

HS1

HEATSINK CLIP TO220 13/8.6 DC/W

F006

Q18

TRANS LF SS N SM BC849B

4A849B

HS1

HEATSINK TO220 13 DEGC/W

F005

Q19

TRANS LF SS N SM BC849B

4A849B

HS3

HEATSINK TO220 CLIP 23DEG/W

F004

Q20

TRANS LF SS N SM BC849B

4A849B

HS5

CARBON THERMAL PAD

E816MC

Q21

TRANS LF SS N SM BC849B

4A849B

HS5

HEATSINK TO247 CLIP 2DEGC/W E803HK

E803HK

Q22

TRANS LF SS N SM BC849B

4A849B

HS5

HEATSINK CLIP TO220 13/8.6 DC/W

F006

Q23

TRANS LF SS N SM BC849B

4A849B

HS7

HEATSINK TO220 CLIP 23DEG/W

F004

Q24

TRANS LF SS N SM BC849B

4A849B

HS9

HEATSINK CLIP TO220 13/8.6 DC/W

F006

Q25

TRANS LF SS N SM BC849B

4A849B

HS9

CARBON THERMAL PAD

E816MC

Q26

TRANS LF SS N SM BC849B

4A849B

HS9

HEATSINK TO247 CLIP 2DEGC/W E803HK

E803HK

Q27

TRANS LF SS N SM BC849B

4A849B

HS10

HEATSINK TO220 CLIP 23DEG/W

F004

Q28

TRANS LF SS N SM BC849B

4A849B

HS11

HEATSINK TO247 CLIP 2DEGC/W E803HK

E803HK

Q29

TRANS LF SS N SM BC849B

4A849B

HS11

HEATSINK CLIP TO220 13/8.6 DC/W

F006

Q30

TRANS LF SS N SM BC849B

4A849B

HS11

CARBON THERMAL PAD

E816MC

Q31

TRANS LF SS N SM BC849B

4A849B

HS12

CARBON THERMAL PAD

E816MC

Q32

TRANS LF SS N 2SC2547

4A2546

HS12

HEATSINK TO247 CLIP 2DEGC/W E803HK

E803HK

Q33

TRANS LF SS P 2SA1085

4A1085

HS12

HEATSINK CLIP TO220 13/8.6 DC/W

F006

Q34

TRANS LF SS N SM BC849B

4A849B

HS13

HEATSINK TO220 CLIP 23DEG/W

F004

Q35

TRANS LF SS N 2SC2547

4A2546

HS14

HEATSINK TO220 CLIP 23DEG/W

F004

Q36

TRANS LF SS P 2SA1085

4A1085

L1

INDUCT 2U2 15x25mm AD2018

7D002A

Q37

TRANS LF SS N SM BC849B

4A849B

L2

INDUCT 2U2 15x25mm AD2018

7D002A

Q38

TRANS LF SS P 2SA1085

4A1085

L3

27mH INDUCTOR

7D327

Q39

TRANS LF SS N SM BC849B

4A849B

LED1P

LED RED/GREEN 5MM

3D002

Q40

TRANS LF SS N 2SC2547

4A2546

LK9P

JUMPER 4-WAY LEAD

L836CA

Q41

TRANS LF SS N 2SC2547

4A2546

O1

OPTO ISOLATOR 4N35

5T4N35

Q42

TRANS LF SS N SM BC847B

4A847

PCB

PRINTED CIRCUIT BOARD

L829PB

Q43

TRANS LF SS N 2SC2547

4A2546

Q1

TRANS AUDIO DRIVER N 2SC5248

4B5248

Q44

TRANS LF SS N 2SC2547

4A2546

Q2

TRANS AUDIO DRIVER N 2SC5248

4B5248

Q45

TRANS LF SS N 2SC2547

4A2546

Q3

TRANS AUDIO DRIVER N 2SC5248

4B5248

Q46

TRANS LF SS N 2SC2547

4A2546

Q4

TRANS AUDIO DRIVER P 2SA1964

4B1964

Q47

TRANS LF SS N 2SC2547

4A2546

Q5

TRANS AUDIO DRIVER P 2SA1964

4B1964

Q48

TRANS LF SS P SM BC856B

4A856B

Q6

TRANS AUDIO DRIVER P 2SA1964

4B1964

Q49

TRANS LF SS P SM BC856B

4A856B

Q7

TRANS LF SS P SM BC856B

4A856B

Q50

TRANS LF SS P SM BC856B

4A856B

Q8

TRANS LF SS N SM BC846B

4A846B

Q51

TRANS LF SS P SM BC856B

4A856B

Q9

TRANS LF SS N SM BC846B

4A846B

Q52

TRANS LF SS P SM BC859B

4A859B

6

ALPHA 10/10P SERVICE MANUAL

Q53

TRANS LF SS P SM BC859B

4A859B

R34

RESISTOR SM W4 11K 2%

1A311

Q54

TRANS LF SS P SM BC859B

4A859B

R35P

RESISTOR SM W4 0R0 2%

1A000

Q55

TRANS LF SS P SM BC859B

4A859B

R35

RESISTOR SM W4 1K0 2%

1A210

Q56

TRANS LF SS P SM BC859B

4A859B

R36

RESISTOR SM W4 47K 2%

1A347

Q57

TRANS LF SS P SM BC859B

4A859B

R37

RESISTOR SM W4 22K 2%

1A322

Q58

TRANS LF SS P SM BC859B

4A859B

R38

RESISTOR SM W4 47K 2%

1A347

Q59

TRANS LF SS N SM BC849B

4A849B

R39

RESISTOR SM W4 47K 2%

1A347

Q60

TRANS LF SS P SM BC859B

4A859B

R40

RESISTOR SM W4 22K 2%

1A322

Q61

TRANS LF SS N SM BC849B

4A849B

R41

RESISTOR SM W4 47K 2%

1A347

Q62

TRANS LF SS N SM BC849B

4A849B

R42

RESISTOR SM W4 47K 2%

1A347

R1

RES MF FU W3 1R0 5% NFR25

1G810

R43

RESISTOR SM W4 47K 2%

1A347

R2

RES MF FU W3 1R0 5% NFR25

1G810

R44

RESISTOR SM W4 47K 2%

1A347

R3

RES MF FU W3 1R0 5% NFR25

1G810

R45

RESISTOR SM W4 47K 2%

1A347

R4

RES CF 1W 330R 5%

1E133

R46

RESISTOR SM W4 47K 2%

1A347

R5

RES CF 1W 330R 5%

1E133

R47

RESISTOR SM W4 68K 2%

1A368

R6

RES CF W2 100R 5%

1D110

R48

RESISTOR SM W4 180R 2%

1A118

R7

RES MF FU W3 470R 5% NFR25

1G147

R49

RES CF W2 100R 5%

1D110

R8

RES MF FU W3 470R 5% NFR25

1G147

R50

RES MF FU W3 100R 5% NFR25

1G110

R9

RES MF FU W3 220R 5% NFR25

1G122

R51

RES MF FU W3 10R 5% NFR25

1G010

R10

RES MF FU W3 220R 5% NFR25

1G122

R52

RES MF FU W3 10R 5% NFR25

1G010

R11

RES MF FU W3 1K0 5% NFR25

1G210

R53

RES CF 2W 220R 5%

1C122

R12

RES MF FU W3 470R 5% NFR25

1G147

R54

RES MF FU W3 100R 5% NFR25

1G110

R13

RES MF FU W3 470R 5% NFR25

1G147

R55

RES MF FU W3 10R 5% NFR25

1G010

R14

RES MF FU W3 220R 5% NFR25

1G122

R56

RES MF FU W3 10R 5% NFR25

1G010

R15

RES MF FU W3 220R 5% NFR25

1G122

R57

RES CF 2W 220R 5%

1C122

R16

RES MF FU W3 1K0 5% NFR25

1G210

R58

RESISTOR SM W4 47R 2%

1A047

R17

RES MF FU W3 470R 5% NFR25

1G147

R59

RESISTOR SM W4 1M0 2%

1A510

R18

RES MF FU W3 470R 5% NFR25

1G147

R60

RESISTOR SM W4 1M0 2%

1A510

R19

RES MF FU W3 1K0 5% NFR25

1G210

R61

RESISTOR SM W4 2M2 2%

1A522

R20

RES MF FU W3 1K0 5% NFR25

1G210

R62

RESISTOR SM W4 1M0 2%

1A510

R21

RES MF FU W3 1K0 5% NFR25

1G210

R63

RESISTOR SM W4 1M0 2%

1A510

R22

RESISTOR SM W8 220R 1%

1A122A

R64

RESISTOR SM W4 2M2 2%

1A522

R23

RESISTOR SM W8 220R 1%

1A122A

R65

RESISTOR SM W4 220R 2%

1A122

R24

RESISTOR SM W8 2K4 1%

1A224A

R65P

RESISTOR SM W4 0R0 2%

1A000

R25

RESISTOR SM W8 2K4 1%

1A224A

R66

RESISTOR SM W4 47R 2%

1A047

R26

RESISTOR SM W4 22K 2%

1A322

R67

RESISTOR SM W4 47R 2%

1A047

R27

RESISTOR SM W4 22K 2%

1A322

R68

RESISTOR SM W4 10K 2%

1A310

R28

RESISTOR SM W4 10K 2%

1A310

R69

RESISTOR SM W4 10K 2%

1A310

R29

RESISTOR SM W4 1K5 2%

1A215

R70

RESISTOR SM W4 10K 2%

1A310

R30

RESISTOR SM W4 120K 2%

1A412

R71

RESISTOR SM W4 4K7 2%

1A247

R31

RESISTOR SM W4 120K 2%

1A412

R72

RESISTOR SM W4 100R 2%

1A110

R32

RESISTOR SM W4 100K 2%

1A410

R73

RESISTOR SM W4 100R 2%

1A110

R33

RESISTOR SM W4 12K 2%

1A312

R74

RESISTOR SM W4 100R 2%

1A110

7

ALPHA 10/10P SERVICE MANUAL

R75

RESISTOR SM W4 1K0 2%

1A210

R116

RESISTOR SM W4 10K 2%

1A310

R76

RESISTOR SM W4 100R 2%

1A110

R117

RESISTOR SM W4 1K5 2%

1A215

R77

RESISTOR SM W4 100R 2%

1A110

R118

RESISTOR SM W4 33K 2%

1A333

R78

RESISTOR SM W4 100R 2%

1A110

R119

RESISTOR SM W4 33K 2%

1A333

R79

RESISTOR SM W4 1K0 2%

1A210

R120

RESISTOR SM W4 33K 2%

1A333

R80P

RESISTOR SM W4 0R0 2%

1A000

R121

RESISTOR SM W4 33K 2%

1A333

R80

RESISTOR SM W4 10K 2%

1A310

R122

RESISTOR SM W4 33K 2%

1A333

R81

RESISTOR SM W4 180R 2%

1A118

R123

RESISTOR SM W4 33K 2%

1A333

R82

RESISTOR SM W4 180R 2%

1A118

R124

RESISTOR SM W4 33K 2%

1A333

R83P

RESISTOR SM W4 0R0 2%

1A000

R125

RESISTOR SM W4 33K 2%

1A333

R83

RESISTOR SM W4 100R 2%

1A110

R126

RESISTOR SM W4 33K 2%

1A333

R84

RES MO 3W 5% 0R22 KOASPR3

1Q922

R127

RESISTOR SM W4 33K 2%

1A333

R85

RES MO 3W 5% 0R22 KOASPR3

1Q922

R128

RESISTOR SM W4 22K 2%

1A322

R86

RES MO 3W 5% 0R22 KOASPR3

1Q922

R129

RESISTOR SM W4 220R 2%

1A122

R87

RES MO 3W 5% 0R22 KOASPR3

1Q922

R130

RESISTOR SM W4 220R 2%

1A122

R88

RES MO 3W 5% 0R22 KOASPR3

1Q922

R131

RESISTOR SM W4 220R 2%

1A122

R89

RES MO 3W 5% 0R22 KOASPR3

1Q922

R132

RESISTOR SM W4 220R 2%

1A122

R90

RES MO 3W 5% 0R22 KOASPR3

1Q922

R133

RESISTOR SM W4 220R 2%

1A122

R91

RES MO 3W 5% 0R22 KOASPR3

1Q922

R134

RESISTOR SM W4 220R 2%

1A122

R92

RESISTOR SM W4 47R 2%

1A047

R135

RESISTOR SM W4 220R 2%

1A122

R93

RESISTOR SM W4 47R 2%

1A047

R136

RESISTOR SM W4 220R 2%

1A122

R94

RESISTOR SM W4 150R 2%

1A115

R137

RESISTOR SM W4 100K 2%

1A410

R95

RESISTOR SM W4 47R 2%

1A047

R138

RES MF FU W3 220R 5% NFR25

1G122

R96

RESISTOR SM W4 47R 2%

1A047

R139

RES MF FU W3 100R 5% NFR25

1G110

R97

RESISTOR SM W4 150R 2%

1A115

R140

RES MF FU W3 100R 5% NFR25

1G110

R98

RESISTOR SM W4 27K 2%

1A327

R141

RES MF FU W3 220R 5% NFR25

1G122

R99

RESISTOR SM W4 470R 2%

1A147

R142

RESISTOR SM W4 4K7 2%

1A247

R100

RESISTOR SM W4 4K7 2%

1A247

R143

RES MF FU W3 220R 5% NFR25

1G122

R101

RESISTOR SM W4 470R 2%

1A147

R144

RES MF FU W3 100R 5% NFR25

1G110

R102

RESISTOR SM W4 68K 2%

1A368

R145

RES MF FU W3 100R 5% NFR25

1G110

R103

RESISTOR SM W4 68K 2%

1A368

R146

RES MF FU W3 220R 5% NFR25

1G122

R104

RESISTOR SM W4 120K 2%

1A412

R147

RESISTOR SM W4 470R 2%

1A147

R105

RESISTOR SM W4 68K 2%

1A368

R148

RES MF FU W3 1K0 5% NFR25

1G210

R106

RESISTOR SM W4 68K 2%

1A368

R149

RES MF FU W3 1K0 5% NFR25

1G210

R107

RESISTOR SM W4 120K 2%

1A412

R150

RES MF FU W3 470R 5% NFR25

1G147

R108

RESISTOR SM W4 1K2 2%

1A212

R151

RES MF FU W3 1K0 5% NFR25

1G210

R109

RESISTOR SM W4 1K2 2%

1A212

R152

RES MF FU W3 1K0 5% NFR25

1G210

R110

RES CF 1W 1R5 5%

1E815

R153

RES MF FU W3 470R 5% NFR25

1G147

R111

RES CF 1W 1R5 5%

1E815

R154

RESISTOR SM W4 2K2 2%

1A222

R112

RES CF 1W 5R6 5%

1E856

R155

RESISTOR SM W4 2K2 2%

1A222

R113

RES CF 1W 5R6 5%

1E856

R156

RESISTOR SM W4 2K2 2%

1A222

R114

RESISTOR SM W4 47R 2%

1A047

R157

RESISTOR SM W4 2K2 2%

1A222

R115

RESISTOR SM W4 1K5 2%

1A215

R158

RESISTOR SM W4 1K5 2%

1A215

8

ALPHA 10/10P SERVICE MANUAL

R159

RESISTOR SM W4 1K5 2%

1A215

R202

RESISTOR SM W4 100K 2%

1A410

R160

RESISTOR SM W4 100R 2%

1A110

R203

RESISTOR SM W4 2K4 2%

1A224

R161

RESISTOR SM W4 100R 2%

1A110

R204

RESISTOR SM W4 10K 2%

1A310

R162

RESISTOR SM W4 100R 2%

1A110

R205

RES CF 1W 5% 6K8

1E268

R163

RESISTOR SM W4 100R 2%

1A110

R206

RESISTOR SM W4 100K 2%

1A410

R164

RESISTOR SM W8 560R 1%

1A156A

R207

RESISTOR SM W4 100K 2%

1A410

R165

RESISTOR SM W8 560R 1%

1A156A

R208

RESISTOR SM W4 470R 2%

1A147

R166

RESISTOR SM W4 2K2 2%

1A222

R209

RESISTOR SM W4 4K7 2%

1A247

R167

RESISTOR SM W4 2K2 2%

1A222

R210

RESISTOR SM W4 1K5 2%

1A215

R168

RESISTOR SM W4 220R 2%

1A122

R211

RESISTOR SM W4 4K7 2%

1A247

R169

RESISTOR SM W4 220R 2%

1A122

R212

RESISTOR SM W4 1K5 2%

1A215

R170

RES MF W4 22K 1%

1H322

R213

RESISTOR SM W4 47R 2%

1A047

R171

RES MF W4 22K 1%

1H322

R214

RESISTOR SM W4 4K7 2%

1A247

R172

RESISTOR SM W4 10R 2%

1A010

R215

RESISTOR SM W4 4K7 2%

1A247

R173

RESISTOR SM W4 470R 2%

1A147

R216

RESISTOR SM W4 1K0 2%

1A210

R174

RESISTOR SM W4 10R 2%

1A010

R217

RESISTOR SM W4 10K 2%

1A310

R175

RESISTOR SM W4 4K7 2%

1A247

R218P

RESISTOR SM W4 220R 2%

1A122

R176

RESISTOR SM W4 470K 2%

1A447

R218

RESISTOR SM W4 120K 2%

1A412

R177

RESISTOR SM W4 470K 2%

1A447

R219

RESISTOR SM W4 10K 2%

1A310

R178

RESISTOR SM W4 470K 2%

1A447

R220

RESISTOR SM W4 100K 2%

1A410

R179

RESISTOR SM W4 470K 2%

1A447

R221

RES CF 1W 470R 5%

1E147

R180

RESISTOR SM W8 47K 1%

1A347A

R222

RESISTOR SM W4 100K 2%

1A410

R181

RESISTOR SM W8 47K 1%

1A347A

R223

RESISTOR SM W4 10K 2%

1A310

R182

RESISTOR SM W8 2K7 1%

1A227A

R224

RES MF FU W3 10R 5% NFR25

1G010

R183

RESISTOR SM W8 2K7 1%

1A227A

R225

RESISTOR SM W4 10K 2%

1A310

R184

RESISTOR SM W4 100K 2%

1A410

R226

RESISTOR SM W4 10K 2%

1A310

R185

RESISTOR SM W4 100K 2%

1A410

R227

RES MF W4 10R 1%

1H010

R186

RESISTOR SM W4 120K 2%

1A412

R228

RES CF 1W 2K7 5%

1E227

R187

RESISTOR SM W8 8K2 1%

1A282A

R229

RES CF 1W 2K7 5%

1E227

R188

RESISTOR SM W8 8K2 1%

1A282A

R230

RESISTOR SM W4 47K 2%

1A347

R189

RESISTOR SM W4 27K 2%

1A327

R231

RESISTOR SM W4 47K 2%

1A347

R190

RESISTOR SM W4 1M0 2%

1A510

R232

RESISTOR SM W4 1K0 2%

1A210

R191

RESISTOR SM W4 27K 2%

1A327

R233

RESISTOR SM W4 3K3 2%

1A233

R192

RESISTOR SM W4 470K 2%

1A447

R234

RESISTOR SM W4 3K3 2%

1A233

R193

RESISTOR SM W4 22R 2%

1A022

R235

RESISTOR SM W4 100K 2%

1A410

R194

RESISTOR SM W4 22R 2%

1A022

R236

RESISTOR SM W4 10K 2%

1A310

R195

RESISTOR SM W4 22R 2%

1A022

R237

RESISTOR SM W4 1K5 2%

1A215

R196

RESISTOR SM W4 22R 2%

1A022

R238

RESISTOR SM W4 1K8 2%

1A218

R197

RESISTOR SM W4 100K 2%

1A410

R239

RESISTOR SM W4 1K8 2%

1A218

R198

RESISTOR SM W4 4K7 2%

1A247

RLY1

RLY SPST 24V SPKR

A213

R199

RES MF FU W3 1R0 5% NFR25

1G810

RLY2

RLY SPST 24V SPKR

A213

R200

RES CF 1W 2K7 5%

1E227

RLY3

RLY SPST 24V SPKR

A213

R201

RESISTOR SM W4 22K 2%

1A322

RLY4

RLY SPST 24V SPKR

A213

9

ALPHA 10/10P SERVICE MANUAL

RLY6

RELAY MAINS 24V 10A

A212

TX1

ALPHA10 AMP POWER TX 230V

L831TX

RLY7

RELAY MAINS DPDT 12V 5A

A211

TX2

ALPHA 10 AMP 230V/115V TRANSFORMER

L825TX

SH1

MAINS EMC SHIELD

E5402

X1

CER RESON 4.00MHz

7W005

SH2

PHONO EMC SHIELD

E808MC

Y1

TX WIRE RESTRAINT

F185

SK1

PHONO SKT 4-WAY EMC GOLD

8D225

Y2

TX WIRE RESTRAINT

F185

SK2

CAMCON BINDING POST 4WAY GOLD

8D417G

Z1

IC VREG POS LM317T

5D317T

SK3

CAMCON BINDING POST 4WAY GOLD

8D417G

Z2

IC VREG POS LM337T

5D337

SK4

IEC MAINS CONN PCB INS PX

8A001

Z3

IC AUDIO SM DUAL TL072

5B072D

SK5

STEREO JACK PCB

8D301

Z4

IC AUDIO SM DUAL TL072

5B072D

SK6

22-WAY FFC CONN

8K8022

Z5

IC COMPARITOR TA7317P

5M7317

SK7

CAGE CLAMP 16A 3 WAY

8Q001

Z6

IC VREG POS 7805

5D7805

SK8

CAGE CLAMP 16A 4 WAY

8Q002

Z7

IC VREG POS 7808

5D7808

SK9

CAGE CLAMP 16A 1 WAY ARC003-236

8Q003

Z8

IC COMPARITOR SM DUAL LM393A

5M393AD

SK10

MIN JACK DUAL 3.5mm HSJ1002-01-1020

8D302

Z9

IC SOCKET 28 NARROW

8S028N

SKT1

JST 6 WAY HEADER

8K709

Z9

IC CMOS MICRO HT48R30 28-DIP-B-0

5B483028

SW2

SW PUSH 2PCO

A1008

Z10

IC THERMOSTAT SM LM56CIM

5M56

SW3

SW PUSH 2PCO

A1008

Z11

IC THERMOSTAT SM LM56CIM

5M56

SW4

SW PUSH 2PCO

A1008

Z12

IC CMOS EPROM 24C02 SM

5G2402

SW5

SW PUSH 2PCO

A1008

Z13

IC COMPARITOR SM DUAL LM393A

5M393AD

TH2

THERMISTOR MAINS SURGE

1T004

TH3

THERMISTOR MAINS SURGE

1T004

ALPHA 10 PREAMPLIFIER BOARD PARTS LIST
Ref No.

Description

Part No.

C24

MLC 47P 100V NPO 5% SM

2C047

C1

ELST NON POLAR 10UF 35V

2U610

C25

MLC 47P 100V NPO 5% SM

2C047

C2

ELST 22U 63V

2N622

C26

MLC 47P 100V NPO 5% SM

2C047

C3

ELST NON POLAR 10UF 35V

2U610

C31

ELST 22U 63V

2N622

C4

ELST 22U 63V

2N622

C32

ELST 22U 63V

2N622

C8

MLC 1N0 50V X7R 10% SM

2C210

C33

MLC 1N0 50V X7R 10% SM

2C210

C9

MLC 1N0 50V X7R 10% SM

2C210

C34

MLC 1N0 50V X7R 10% SM

2C210

C10

PPRO 680P 5% 63V RA

2D168

C35

MLC 1N0 50V X7R 10% SM

2C210

C11

PPRO 680P 5% 63V RA

2D168

C36

MLC 1N0 50V X7R 10% SM

2C210

C13

MLC 47P 100V NPO 5% SM

2C047

C37

MLC 1N0 50V X7R 10% SM

2C210

C14

MLC 47P 100V NPO 5% SM

2C047

C38

MLC 1N0 50V X7R 10% SM

2C210

C15

MLC 47P 100V NPO 5% SM

2C047

D1

ZENER 6V8 400MW

3C06804

C16

MLC 47P 100V NPO 5% SM

2C047

D2

ZENER 6V8 400MW

3C06804

C17

MLC 47P 100V NPO 5% SM

2C047

LK1

JUMPER 8-WAY LEAD FOR A10 PRE-AMP

L823CA

C18

MLC 47P 100V NPO 5% SM

2C047

LK2

JUMPER 8-WAY LEAD FOR A10 PRE-AMP

L832CA

C19

MLC 47P 100V NPO 5% SM

2C047

PCB

PRINTED CIRCUIT BOARD

L832PB

C20

MLC 47P 100V NPO 5% SM

2C047

PL6

16 WAY DIL PIN HEADER

8K6316

C21

MLC 47P 100V NPO 5% SM

2C047

R1

RESISTOR SM W4 1K0 2%

1A210

C22

MLC 47P 100V NPO 5% SM

2C047

R2

RESISTOR SM W4 1K0 2%

1A210

C23

MLC 47P 100V NPO 5% SM

2C047

R3

RESISTOR SM W4 56R 2%

1A056

10

ALPHA 10/10P SERVICE MANUAL

R4

RESISTOR SM W4 56R 2%

1A056

R58

RESISTOR SM W4 47R 2%

1A047

R5

RESISTOR SM W4 1K8 2%

1A218

R59

RESISTOR SM W4 47R 2%

1A047

R6

RESISTOR SM W4 100K 2%

1A410

R60

RESISTOR SM W4 47R 2%

1A047

R7

RESISTOR SM W4 100K 2%

1A410

R61

RESISTOR SM W4 47R 2%

1A047

R14

RESISTOR SM W4 10K 2%

1A310

R62

RESISTOR SM W4 47R 2%

1A047

R17

RESISTOR SM W4 1K0 2%

1A210

R63

RESISTOR SM W4 47R 2%

1A047

R18

RESISTOR SM W4 1K0 2%

1A210

R64

RESISTOR SM W8 1K5 1%

1A215A

R19

RESISTOR SM W4 1K0 2%

1A210

R65

RESISTOR SM W8 1K5 1%

1A215A

R20

RESISTOR SM W4 1K0 2%

1A210

R66

RESISTOR SM W8 6K8 1%

1A268A

R21

RESISTOR SM W4 1K0 2%

1A210

R67

RESISTOR SM W8 6K8 1%

1A268A

R22

RESISTOR SM W4 1K0 2%

1A210

R68

RESISTOR SM W4 100K 2%

1A410

R23

RESISTOR SM W4 1K0 2%

1A210

R69

RESISTOR SM W4 100K 2%

1A410

R24

RESISTOR SM W4 1K0 2%

1A210

R70

RESISTOR SM W4 100K 2%

1A410

R25

RESISTOR SM W4 1K0 2%

1A210

R71

RESISTOR SM W4 100K 2%

1A410

R26

RESISTOR SM W4 1K0 2%

1A210

R72

RESISTOR SM W4 100K 2%

1A410

R27

RESISTOR SM W4 1K0 2%

1A210

R73

RESISTOR SM W4 100K 2%

1A410

R28

RESISTOR SM W4 1K0 2%

1A210

R74

RESISTOR SM W4 100K 2%

1A410

R29

RESISTOR SM W4 1K0 2%

1A210

R75

RESISTOR SM W4 100K 2%

1A410

R30

RESISTOR SM W4 1K0 2%

1A210

R76

RESISTOR SM W4 100K 2%

1A410

R31

RESISTOR SM W4 1K0 2%

1A210

R77

RESISTOR SM W4 100R 2%

1A110

R32

RESISTOR SM W4 1K0 2%

1A210

R80

RESISTOR SM W4 22K 2%

1A322

R33

RESISTOR SM W4 1K0 2%

1A210

R81

RESISTOR SM W4 22K 2%

1A322

R34

RESISTOR SM W4 1K0 2%

1A210

SK1

PHONO SKT 4-WAY EMC GOLD

8D225

R38

RESISTOR SM W4 100K 2%

1A410

SK2

PHONO SKT 4-WAY EMC GOLD

8D225

R39

RESISTOR SM W4 100K 2%

1A410

SK3

PHONO SKT 4-WAY EMC GOLD

8D225

R40

RESISTOR SM W4 100K 2%

1A410

SK4

PHONO SKT 4-WAY EMC GOLD

8D225

R41

RESISTOR SM W4 100K 2%

1A410

SK5

PHONO SKT 2-WAY EMC GOLD

8D226

R44

RESISTOR SM W4 22K 2%

1A322

SK7

22-WAY FFC CONN

8K8022

R45

RESISTOR SM W4 22K 2%

1A322

SK8

32-WAY FFC CONN VERT

8K8032

R46

RESISTOR SM W4 22K 2%

1A322

Z3

IC OPAMP DUAL SM OPA2134PA

5B2134

R47

RESISTOR SM W4 22K 2%

1A322

Z4

IC OPAMP DUAL SM OPA2134PA

5B2134

R48

RESISTOR SM W4 22K 2%

1A322

Z6

IC HCMOS SM MAX 4051

5K4051M

R49

RESISTOR SM W4 22K 2%

1A322

Z7

IC HCMOS SM MAX 4051

5K4051M

R50

RESISTOR SM W4 22K 2%

1A322

Z8

IC HCMOS SM MAX 4051

5K4051M

R51

RESISTOR SM W4 22K 2%

1A322

Z9

IC HCMOS SM MAX 4051

5K4051M

R52

RESISTOR SM W4 22K 2%

1A322

Z10

IC HCMOS SM MAX 4051

5K4051M

R53

RESISTOR SM W4 22K 2%

1A322

Z11

IC HCMOS SM MAX 4051

5K4051M

R54

RESISTOR SM W4 22K 2%

1A322

Z12

IC AUDIO SM DUAL TL072

5B072D

R55

RESISTOR SM W4 22K 2%

1A322

Z13

IC AUDIO SM DUAL TL072

5B072D

R56

RESISTOR SM W4 22K 2%

1A322

Z14

IC AUDIO DUAL VOLPOT LM1972

5C1972

R57

RESISTOR SM W4 22K 2%

1A322

ALPHA 10 DISPLAY BOARD PARTS LIST

11

ALPHA 10/10P SERVICE MANUAL

Ref No.

Description

Part No.

R6

RES MF W4 150R 1%

1H115

C1

CERD 100N 63V 20% RA

2A410

R7

RES MF W4 150R 1%

1H115

C2

ELST 470U 25V RA

2N747

R8

RES MF W4 150R 1%

1H115

C3

CERD 100N 63V 20% RA

2A410

R9

RES MF W4 4K7 1%

1H247

C4

CERD 100N 63V 20% RA

2A410

R10

RES MF W4 4K7 1%

1H247

C5

CERD 100N 63V 20% RA

2A410

R11

RES MF W4 10K 1%

1H310

C6

ELST 220U 16V

2N722

R12

RES MF W4 10K 1%

1H310

C8

CERD 100N 63V 20% RA

2A410

R13

RES MF W4 150R 1%

1H115

D1

SSDIODE 1N4148 75V

3A4148

R14

RES MF W4 330R 1%

1H133

D2

SSDIODE 1N4148 75V

3A4148

R15

RES MF W4 4K7 1%

1H247

D3

SSDIODE 1N4148 75V

3A4148

R16

RES MF W4 4K7 1%

1H247

D4

SSDIODE 1N4148 75V

3A4148

R17

RES MF W4 10K 1%

1H310

D5

SSDIODE 1N4148 75V

3A4148

R18

RES MF W4 100R 1%

1H110

D6

SSDIODE 1N4148 75V

3A4148

R19

RES MF W4 100R 1%

1H110

D7

SSDIODE 1N4148 75V

3A4148

R20

RES MF W4 100K 1%

1H410

D8

SSDIODE 1N4148 75V

3A4148

R21

RES MF W4 100R 1%

1H110

D9

SSDIODE 1N4148 75V

3A4148

R22

RES MF W4 100K 1%

1H410

D10

SSDIODE 1N4148 75V

3A4148

RP1

RES NETWORK 100Kx8 COMMON

1V410

D11

SSDIODE 1N4148 75V

3A4148

RX1

REMOTE CONTROL RECEIVER SBX1610-62 38KHZ

B2103

L831PB

PRINTED CIRCUIT BOARD

L831PB

SK1

22-WAY FFC CONN HORIZ

8K8122

LED1

LED GREEN 5MM

3D001

SK2

22-WAY FFC CONN HORIZ

8K8122

LED2

LED GREEN 5MM

3D001

SK3

EC16B2414

A1211

LED3

LED GREEN 5MM

3D001

SW1

TACT SWITCH 2-PIN LOW PROF

A1504

LED4

LED GREEN 5MM

3D001

SW2

TACT SWITCH 2-PIN LOW PROF

A1504

LED5

LED GREEN 5MM

3D001

SW3

TACT SWITCH 2-PIN LOW PROF

A1504

LED6

LED GREEN 5MM

3D001

SW4

TACT SWITCH 2-PIN LOW PROF

A1504

LED7

LED GREEN 5MM

3D001

SW5

TACT SWITCH 2-PIN LOW PROF

A1504

LED100

LED RED/GREEN 5MM

3D002

SW6

TACT SWITCH 2-PIN LOW PROF

A1504

LK1

LINK PLAIN 10mm

1X010A

SW7

TACT SWITCH 2-PIN LOW PROF

A1504

LK3

JUMPER 3 WAY x 125mm

L815CA

SW8

TACT SWITCH 2-PIN LOW PROF

A1504

M1

NORITAKE ITRON CU20025RCPB-U1J

B1010

SW9

TACT SWITCH 2-PIN LOW PROF

A1504

Q1

TRANS LF SS P BC557B

4A557

SW10

TACT SWITCH 2-PIN LOW PROF

A1504

Q2

TRANS MOSFET SW ZVNL120A

4K120

SW11

TACT SWITCH 2-PIN LOW PROF

A1504

R1

RES MF FU W3 3R3R 5% NFR25

1G833

X1

CER RESON 4.00MHz

7W005

R2

RES MF W4 150R 1%

1H115

Z1

IC VREG POS 7805

5D7805

R3

RES MF W4 150R 1%

1H115

Z2

40 PIN IC SOCKET

8S040

R4

RES MF W4 150R 1%

1H115

Z2

IC CMOS MICRO PIC16C65

5H16C65

R5

RES MF W4 150R 1%

1H115

12

FR4_2OZ

470R FU

R7

1R0 FU

100R W2 CF

1N4003F

10V 400MW

D3

D14
6A40

6A40
R228

2K7 1W CF

R229

10U EL

6A40

D13

6A40

D12

100U EL 100V

ATE_PAD
C2

+

470R FU

R8

1R0 FU

R2

15V 400MW
!

D15

D4

HS8N
TO220HS23TR D2

!

+ C19
10M EL 63V

10V 400MW

-15V Regulator

!

+UREG
ATE_PAD +15V

Q39
BC849B

B
C38
680P PP

4

4

-15V
+5V

Control Supply

MOLEX2MV
MOLEX2MV
+8V

O

Vout

C10

GND

C31
LOut

Vin

100N SM

I

C94

PMPU1

Z6
7805

ATE_PAD

+

G

C89

100N SM

100N SM

100N SM
C88

C87

47K SM

R230
Q_30

10U EL

C39
680P PP

SKT2 SKT3
2
1
1
2

Digital Supply

FIX2

Z3C
Z4C
TL072 SM TL072 SM

FANOUT
ATE_PAD

BAS16W SM

ACD2
ATE_PAD

PDIG1
ATE_PAD
+

BAS16W SM 47K SM
D47
Q_47
R231

11

1N4003F

O

Vout

D46

11V

230V

+8V

100N SM
C45

D19

+

1N4003F

C86

12

Vin
Z7
7808

HS

ATE_PAD

GND

I

0V

Q59F
2SC5248

D45

10U EL

Q_56

-SUP

8

R232

Fan

8

5V6 400MW

D50

10K SM

10U EL
R217

C90
+UREG

UREG1

1N4003F

-15V

1K0 SM

G

1N4003F

CAGECLAMP4

10U EL

C7
C9

2K7 1W CF D11

D10

C1
ATE_PAD

PAN1

100U EL 100V

220R SM1%
R23

2K4 SM1%

R25

22U EL

ADJ

NAN1

A

22U EL

C8

4N7 PP
C33

220R SM1%

R24

2K4 SM1%

R22

HS

ADJ

22U EL

C32

4N7 PP

C6 22U EL

A

PPRE1
ATE_PAD
C20
C21

180R SM

ACDet

C

TO220HS23REG

R35

24V 3W SM
HS2NA
TO220HS08REG

100N SM

4N7 MAINS
TX230
ATE_PAD

AC2
ATE_PAD

ROut

DDH

AS2A5

DDD
Drilling
Detail
DRILL_DWG

DD_A2H
DDV

DD1
Drilling Detail
Issue Box

A2 Vertical
Paper Marker
DD_A2V

DD_ISSUE
BARCD
BARCODE LABEL
BARCODE

1

115V
RLY7A
C44

1
2
3
4

10N SM

A2 Horizontal
Paper Marker

Kit Masks:
1) For Integrated Amp use...
N, F inclusive
2) For Power Amp use...
P,S,F inclusive

11V

2

C13

PCB MATERIAL
FR4, 2 OZ Cu

5

PTHMAINS
AS4A_115V

O

Vout

PGND1

ATE_PAD

Q_55

D44

C85

CAGECLAMP3

F5

Y1
TX WIRE CLIP
F4

DDM

+

ACD1
ATE_PAD
D18

3M3 EL

TX115
ATE_PAD
SK7
1
Blue
2
Dark Grey
3
Orange

PTHMAINS

FIDUCIAL PD7
PD8
SJB
TOOLINGTOOLING

A

RLY DPDT 12V

TXN
ATE_PAD

+

+

SK8

Grey
Light Green
Light Green
Grey
AC1
ATE_PAD

1K0 SM
13

D240V
ATE_PAD

LIVE
ATE_PAD

TH3

S.J.B.
SJB

BAS16W SM

1K0 SM

D

NSUP1

Q_48 R216

C48

NEUTRAL
ATE_PAD

Z2
LM337T

Vin

Q12
BC847B

Q42
BC847B

7

RLY SPDT 24V

TH2

TX2
0V L825TX

Y2
TX WIRE CLIP

EMCMAINS

FD_1

D49

GRN/YEL
CAGECLAMP1

RLY6A

PD5
TOOLING

0V

Green

D115V
ATE_PAD

C47
4N7 MAINS

IEC3

FIDUCIAL

100K SM
D42

+

TXGND
ATE_PAD

BAS16W SM

RLY7B
RLY DPDT 12V

E
N

1

C46
4N7 MAINS

4N7 MAINS

L

SK9

SK4

FD_2

Reset Circuit

R202

+

HS3A

I

BLUE

BLACK

L

N

+

1K5 SM

C96

115V

HS1A
TO220HS13REG

+

Q4
2SA1964

GREEN

R29

FIX1 FIX4 FIX5 FIX6 FIX7

+

Q_57

CONTROL
l829ct2_6.SCH
BROWN

+

-PRE

FIX8 FIX9

EMC Shield

B

RESET

+ C18
10M EL 63V

+15V
O

Vout

R199

EMCPHONO

Vin

1R0 FU

BLUE

230V

SH1

E

ACDet
Fault

4K7 SM

ORANGE

ACDet
Fault

R71

TX1
L831TX

Chassis Connection
FIX3

Fan

FAN
Powerup

10U EL

1 ACDet
+SUP
2
+15V
3
4
5
6
-15V
-SUP
JST 6W HEADER

Replace with same
type component only

LVProt
RVProt

L829PB

D16

SKT1

R81

C41

3rd Ch. Power

NPRE1
ATE_PAD

PCB

ATE_PAD
!

Regulator

47N PE

RLY DPDT 12V

EMC Shield

Bot-

+UREG

180R SM

SH2

CHASS

BAS16W SM
RLY7C

-SUP

PCB

Top-

C101

R82

180R SM

1R0 FU
R3
I

SK3C
CAMCON_G

Bot+

470P SM

ROut

2PCO_VERT

!

R1

+15V
Z1
LM317T

470P SM

C43

10N SM

Output

R48

RLY 51SB12T

HS6N
TO220HS23TR

SK3B

CAMCON_G

RLY5NB

SCREEN
C

SK3A

SPKA2
ATE_PAD

SW1NB
2PCO_VERT

15V 400MW

Q1
2SC5248

CHASS

Bot-

Top+

4

5

RLY1A
RLY SPST SPKR

CAMCON_G

SW1NC

!

+PRE

C30

VI Cut

ABiasRef
Input
R83P 0R0 SM

RLY 51SB12T

Top-

+SUP

D1

RLY SPST SPKR

VI Latch

SK1B

SPKB2
ATE_PAD

RLY3A

68K SM
PWRAMPR
l829ct4_6.SCH

0R0 SM
6

ABSUP

R47

10N SM

C28
470P SM
RLY5NA

R27 22K SM

N

PRE2
ATE_PAD
R65P

SPKA1
ATE_PAD

LOut

R201 22K SM

N

PHONO4G

L&R Inputs F

PRE1
ATE_PAD

F

!

SK2C
CAMCON_G

Bot+

8
PSUP1

330R 1W CF

CAMCON_G
SK2B

Top+
C42

1

Output

R80P 0R0 SM

0R0 SM

1
EMC

ABiasRef
Input

CAMCON_G
SK2A

RLY2A
RLY SPST SPKR

R35P

SK1A

PHONO4G

VI Cut

C40

Pre_Outputs

2

3

22K SM

VI Latch

7

LOut

ATE_PAD

PWRAMPL
l829ct3_6.SCH

R26 22K SM

6
7

R

SPKB1

ATE_PAD

R128

SW1NA
2PCO_VERT

RLY4A
RLY SPST SPKR

R4

330R 1W CF
HP2 R5
ROut
100R W2 CF
R6

VIRESET1

470R SM
-15V

10R MF

ATE_PAD

6

HP1

2
3
1

LHC
RHC

R224

HPSKT

R208

D

SK5
SGND1

10U EL

+

C22

10U EL
R36

Q7
BC856B

C95

Q60
BC859B

4
5

L

R49

VI Cut-out latch
47K SM

+15V
1
2
3
4
5
6
7
8

WTRAP2.5X8V

5

Fault

+

SK11

4

10N SM

Pre-Amp Audio Input

3

C29

2

10N SM

1

2

UPDTBX
Update Box
UPDATE_BOX
PS

Designators ending in...
N - For integrated amp only,
P - For power amp only,
R - For power amp with remote only,
S - For power amp with no remote
only,
X - Other end of wire link.

97_1085

SJB

22-9-97

Hardware Remote RX

2

97_1086

SJB

26-9-97

C6 & C8 change from 10u to 22u

3

97_1096

SJB

22-10-97

No Change

4

97_1102

SJB

11-11-97

HS2N change to larger size

5

23425

Circuit Diagram
Notes:

A & R Cambridge Ltd.
Pembroke Avenue
98_1042 SJB
9-7-98
Denny Industrial Centre
ECO No. INITIALS
DATE
Waterbeach
Date Printed
Filename
Cambridge CB5 9PB
10-Jul-1998
J:\PROJECTS\A10amp\L829pb_Main_PCB\Circuits_&_PCB\wip\L829ct1_6.prj

Photo Strip
PHOTO_STRIP
3

DRAWING TITLE

Alpha 10 Amp Main

4

5

6

PCB Issue 2 to 3 changes

6

DESCRIPTION OF CHANGE
Drawn by:

Sheet 1 of 5

SJB
7

DRAWING NO.

ISSUE

L829CT1
8

A

1

2

3

4

5

6

7

8

D21
+15V

+SUP

Q_10

220R SM

QPAD

220R SM

Q49
BC856B

47N PE

D

Bootstrap

10R SM

56P PS

12V 3W SM

D39

0R22 3W MO

100U EL 100V

HS7
TO220HS23TR

R172

R84

!

+

C4

C69X

Q41
2SC2547

0R22 3W MO

C68
C106
100P PPS SM 100P PPS SM

68K SM
R9

C63

STABLE1

R115

R154

2K2 SM

470R FU
R158

1K5 SM

47R SM

R92

100N SM

R108

1K2 SM

150R SM

R94

1K0 FU
R11

Q32
2SC2547

68K SM

HS10
TO220HS23TR

Q33
2SA1085

!

100U EL

HS9

R103

+

C23

C51

C104

!

R50

ABSUP

100R FU

1K0 FU

R148

10K SM

B

33K SM

Q40
2SC2547

R118

100R SM

3
LM393A SM

BAS16W SM

C57

100N PC

0R22 3W MO

R86

0R22 3W MO

R87

R93
C52

D5

220R SM

220R SM
R129

R130

1K0 FU

R149

1K0 SM
100P PP

R75
C61

100R SM

10V 400MW

ABiasRef

4N7 PP

Q_41
QPAD

Z8A

2

10R FU

R74

C12

!

R51

+

1

IRFP360LC

Q17
BC849B

!

R68

R141

!

R67

R73

220R FU

220R FU

Q8
BC846B

100R SM

Q_8
QPAD

10P SM#A

2K2 SM

C99

Q9
BC846B

47R SM

Q_6

!

Q13

!

R10

220R FU

R240

!

R138
Q2
2SC5248

Q20
BC849B

R166

TO247HS2.8DEGC/W

Q_5
QPAD

QPAD

4K7 SM

220U EL

!

+

VI Cut

22K SM

120K SM

Q_7

Voltage Servo

ATE_PAD

R37

VI Cut-out

R104

O2 TLP181 SM

Q21
BC849B

B

R39

+VI Protection

2K2 SM

R155

4

470R SM

6

3

470R FU
R99

Q_43

150P PP

-VI Protection

R177

Q_3

Output

VI Latch

47R SM

Z3A
TL072 SM

470K SM

C

OUTPUT1

2U2H LAC

R110

220U EL

3

33K SM

R119
2

1

1

R176

470K SM QPAD

ATE_PAD

VSERVO1

10U NP

L1

ATE_PAD

Q23
BC849B

C14

R60 1K8 SM

C71

R12

Q_19
R170

QPAD

150P PP

R168 2K4 SM

R13

47N PE

!

10K SM
Q22
BC849B

1R5 1W CF

22K MF

R164

R194
Q_4

560R SM1%

Q18
BC849B

Q_59

R193
22R SM

1M0 SM

Q_58

C75

47K SM

R59
R38

330P PP

C64

47K SM1%

R180

Q19
BC849B

22R SM

C

C55
100N PC

R112
5R6 2W CF#A

D17

10U NP

C72

Q5
2SA1964

R102

Q_60

47R SM

C56
100N PC

D6
10V 400MW

R58

1N0 PP

R53

R132

Q48
BC856B

C37

220R 2W CF

Q14
IRFP360LC
R131

Q_50

ATE_PAD

C76

100R FU

100R FU
R139

R140

10R FU

220R FU
R85

Q52
BC859B

470R FU

R52

!

R150
QPAD

2K7 SM

100K SM

100R SM

100R SM
BAS16W SM

8K2 SM1%

R187

Q_13

R182

Input

R137

Q_11
QPAD

Q_12
QPAD

Gain 29dB or 28.3x

INPUT1

HS5
TO247HS2.8DEGC/W

R72

3

Q53
BC859B

D32

D

R160

SW2A
2PCO

2

R161

1

100R SM

1N4003F

Bias Level detector
C102
1N0 SM

-15V

7
6

QPAD

2M2 SM

R30

C79

120K SM

TL072 SM

10U NP

33K SM

R61

BAS16W SM

5

A

BSRef

Q_29

D31

Z3B

R120

R184

C67
10N SM

100K SM

Q_49

ATE_PAD

ISERVO1

-SUP
IQ1
ATE_PAD

!

2

3

97_1085

SJB

22-9-97

Hardware Remote RX

2

97_1086

SJB

26-9-97

C64 change from 220P to 330P

3

97_1096

SJB

22-10-97

R50 change from 10R to 100R

4

97_1102

SJB

11-11-97

R61 & 168 changed. C99 added.

5

23425

Replace with same
type component only

Circuit Diagram
Notes:

A & R Cambridge Ltd.
Pembroke Avenue
98_1042 SJB
9-7-98
Denny Industrial Centre
ECO No. INITIALS
DATE
Waterbeach
Date Printed
Filename
Cambridge CB5 9PB
10-Jul-1998
J:\PROJECTS\A10amp\L829pb_Main_PCB\Circuits_&_PCB\wip\l829ct3_6.SCH

Auto-Bias Servo
1

DRAWING TITLE

Alpha 10 Amp L Ch.

4

5

6

PCB Issue 2 to 3 changes

6

DESCRIPTION OF CHANGE
Drawn by:

Sheet 2 of 5

SJB
7

DRAWING NO.

ISSUE

L829CT3
8

A

1

2

3

4

5

6

7

8

D22
+15V

+SUP

10R FU

Q_23

220R SM

QPAD

220R SM

Q51
BC856B

Bootstrap

10R SM

56P PS

12V 3W SM

D41

0R22 3W MO

100U EL 100V

HS13
TO220HS23TR

R174

R88

!

+

C5

C70X

Q44
2SC2547

0R22 3W MO

C107
C108
100P PPS SM 100P PPS SM

68K SM
R14

C65

STABLE2

R117

2K2 SM

R156

1K5 SM

470R FU
R159

R17

Q_45

47R SM

R95

100N SM

R109

1K2 SM

150R SM

R97

1K0 FU

Q35
2SC2547

68K SM

HS14
TO220HS23TR

Q36
2SA1085

!

+

100U EL

HS12

R106

R16

C53

C105

!

R54

ABSUP

100R FU

Q_42
QPAD

B

5

33K SM

Q43
2SC2547

R121

LM393A SM

BAS16W SM

C60

Z8B

6

100N PC

0R22 3W MO

R90

0R22 3W MO

R91

-VI Protection

47R SM
+

220U EL

R96
C54

R151

!

10K SM

!

R55

100R SM

Q24
BC849B

10V 400MW

D7

220R SM

220R SM
R133

R134

1K0 FU

R152

1K0 SM
100P PP

R79
C62

100R SM

4N7 PP

!

7

IRFP360LC

ABiasRef
Q_22
QPAD

R69

R146

Q15

10R FU

R78

C36
R114

47R SM

R77

220R FU

220R FU

Q10
BC846B

100R SM

Q_21
QPAD

10P SM#A

2K2 SM

C100

Q11
BC846B

!

!

R15

220R FU

R241

!

R143
Q3
2SC5248

Q_44

R167

+

VI Cut

22K SM

C24

Q_18
QPAD

Q27
BC849B

4K7 SM

220U EL

!

VI Cut-out

R107

O3 TLP181 SM

QPAD

R42

+VI Protection

2K2 SM

R157

470R SM

470R FU
R101

4

R40

120K SM

Q_20

Voltage Servo

ATE_PAD

VI Latch

150P PP

Q_46
6

3

Q28
BC849B

B

Output
R111

TO247HS2.8DEGC/W

470K SM

C

OUTPUT2

2U2H LAC

C35

1K0 FU

Q_16

R179

Z4A
TL072 SM

33K SM

R122
3

QPAD

2

L2

ATE_PAD

Q30
BC849B

R169 2K4 SM

1

R178

470K SM

ATE_PAD

VSERVO2

10U NP

150P PP

1R5 1W CF

R63 1K8 SM

C73

1

22K MF

QPAD

!

10K SM
Q29
BC849B

R18

47N PE

R171

R165

R196
Q_17

560R SM1%

Q25
BC849B

Q_62

R195
22R SM

1M0 SM

Q_61

C77

47K SM

R62
R41

330P PP

C66

47K SM1%

R181

Q26
BC849B

22R SM

C

C58
100N PC

R113
5R6 2W CF#A

D26

10U NP

C74

Q6
2SA1964

R105

Q_63

47R SM

D

D8
10V 400MW

R66

1N0 PP

R57

R136

Q50
BC856B

C49

220R 2W CF

Q16
IRFP360LC
R135

Q_52

ATE_PAD

C78

100R FU

R145

100R FU
R144

R56

C59
100N PC

47N PE

!

220R FU
R89

Q54
BC859B

!

470R FU

!

R153
QPAD

2K7 SM

100K SM

100R SM

100R SM
BAS16W SM

8K2 SM1%

R188

Q_26

R183

Input

R197

Q_24
QPAD

Q_25
QPAD

Gain 29dB or 28.3x

INPUT2

HS11
TO247HS2.8DEGC/W

R76

6

Q55
BC859B

D34

D

R162

SW2B
2PCO

5

R163

4

100R SM

1N4003F

Bias Level detector
C103
1N0 SM

-15V

R123

Z4B

BSRef

33K SM

Q_51

ATE_PAD

ISERVO2

-SUP
IQ2
ATE_PAD

5
7
6
TL072 SM

R64
2M2 SM

D33

C80

BAS16W SM

A

!

10U NP

2

3

97_1085

SJB

22-9-97

Hardware Remote RX

2

97_1086

SJB

26-9-97

C66 change from 220P to 330P

3

97_1096

SJB

22-10-97

R54 chage from 10R to 100R

4

97_1102

SJB

11-11-97

R64 & 169 changed. C100 added.

5

23425

Replace with same
type component only

Circuit Diagram
Notes:

A & R Cambridge Ltd.
Pembroke Avenue
98_1042 SJB
9-7-98
Denny Industrial Centre
ECO No. INITIALS
DATE
Waterbeach
Date Printed
Filename
Cambridge CB5 9PB
10-Jul-1998
J:\PROJECTS\A10amp\L829pb_Main_PCB\Circuits_&_PCB\wip\l829ct4_6.SCH

Auto-Bias Servo
1

DRAWING TITLE

Alpha 10 Amp R Ch.

4

5

6

PCB Issue 2 to 3 changes

6

DESCRIPTION OF CHANGE
Drawn by:

Sheet 3 of 5

SJB
7

DRAWING NO.

ISSUE

L829CT4
8

A

3

4

LED PCB

5

Demod

Power Supply Detection
BAS16W SM

PWR Amp Control CST4.00

8
Z8C
LM393A SM

Designators ending in...
N - For integrated amp only,
P - For power amp only,
R - For power amp with remote only,
S - For power amp with no remote
only,
X - Other end of wire link.

2

3

HT48R30 28-DIP-B-0

Q_9

THTESTL
ATE_PAD
R33

6

6

6

5

5

5

4

4

4

Display PCB

+5V

12K SM

Z11
VREF VCC
Vt2 OUT1
Vt1 OUT2
GND Vtemp
LM56CIM

8
7
6
5
Q_1

Thermal Protection

R234 10K SM 1
2
3
4

SP 2

Q_31

+5V

VREF VCC
Vt2 OUT1
Vt1 OUT2
GND Vtemp

THERMX1
SP3_PWR
VFAULT1
STBYLED1
REQ1
SDA1
SCK1

Z12
24C02 SM

R65

Powerup

B

4
3
2
1

LED PCB

220R SM

L836CA
3
2
1

LK10R
L815CA

8
7
6
5

1K0 SM
FAN

Remote PCB

ATE IR RX Disable pad

R225R

STANDBY

Z10

SP2
SP1
PROT1

220R SM

LK9P
C84
100N SM

+5V

REMKILL1

Q58R
BC859B
Rmin

Q59
BC849B

User IR RX Disable Link

LM56CIM
Q_32 R191
Q_15
22K SM
n.b. R33 & R34 are supposed to be different!

DRAWING TITLE

97_1085 SJB

22-9-97

Hardware Remote RX

2

Alpha 10 Amp Power Ctrl

97_1086 SJB

26-9-97

No Change

3

97_1096 SJB

22-10-97

No Change

4

97_1102 SJB

11-11-97

No Change

5

Circuit Diagram
Notes:

A & R Cambridge Ltd.
Pembroke Avenue
98_1042 SJB
9-7-98
Denny Industrial Centre
ECO No. INITIALS
DATE
Waterbeach
Date Printed
Filename
Cambridge CB5 9PB
10-Jul-1998
J:\PROJECTS\A10amp\L829pb_Main_PCB\Circuits_&_PCB\wip\l829ct2_6.SCH
4

+5V
8

VDD
A2
A1
A0

1

VSS

R218P

1

SP 1

C
FAULT1
REMI1
REMO1

4K7 SM

1

4

4K7 SM
R215

2

R214

2

WP

2

7

5
6

STBYSW1
3
SW5A
2PCO

SW3A
2PCO

3

+5V

23425

-SUP

1

3

10K SM

BAS16W SM

47K SM
D38

ABSUP

4

10U EL

C16

5V6 400MW

D43

Replace with same
type component only

+

11K SM

Q_28 R189
22K SM

Auto-Bias supply

ABSUP1

A

THTESTR
ATE_PAD
R34

R233 10K SM 1
2
3
4

6K8 1W CF

Power-off Auto-Bias defeat

R203

SK9N +PRE
1
2
3
4
5
6
7 -PRE Fault
8 Rmin
9 RemOut
10
11 SP2MuteN
12 SP1MuteN
13 Prot
14 +8V
15
16 ThermX_RST
17 SP3_PWR
18 VFault
19 STBYLED
20 REQ
21 SDA
22 SCK

FFC22V FFC22V

2K4 SM

10K SM

Q38
2SA1085
R205

-SUP

10U EL
R46

C15

R204

10K SM

33K SM

R125

33K SM

R124

R219

+

Fault

Fault

Q_64

RESET

SP2SW1

SW3B
2PCO

+

Q56
BC859B

Mains/VI Fault detection

Pwrok

3
2
1

1N4003F

28
27
26
25
24
23
22
21
20
19
18
17
16
15

PB5
PB6
PB4
PB7
PA3
PA4
PA2
PA5
PA1
PA6
PA0
PA7
PB3
OSC2
PB2
OSC1
PB1
VDD
PB0
RES
VSS
PC5
(TMR)/INT PC4
PC0
PC3
PC1
PC2

R116

R43

4

10K SM

Speaker/Amp Protection

1U0 EL

!

C3 100N SM

7
V-

C50

D27

R70

ACDet

4V7 400MW

R207

O

47K SM

FB V+

6

D29

9
RC

IN2

10V 400MW

5

100U EL

+

C26

C27

+

R206

Powerup

SW5B
2PCO

D9

100K SM

0V

3

B

SP2MuteN
SP1MuteN
ProtStat

Q58
BC859B

Prot

Z5
TA7317P

PreMuteN

BAS16W SM

!

8
PWR

IN1

100U EL

R186

120K SM

2

RFProt
Therm
Cutout

R20
1K0 FU

1K0 FU

BAS16W SM

VFault

PREMTN1

!

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

SW4A
2PCO

R19

R21 1K0 FU

Powerup

Z9

SP1SW1

D35

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

+UREG

SDA
SCL

10U EL

+

C17

100N SM

Q34
BC849B

100K SM

1

!

BAS16W SM
Q45
2SC2547

4K7 SM

SK6

SW4B
2PCO

D36

C25

+

D37
Q46
2SC2547

100U EL

R32

R235

47K SM

R45

47K SM

R44

100K SM

Lout

LVProt

100K SM

PRTSUP1

Option PCB

D48

D40

RemMute

+5V

C34

R192

1U0 EL

+

+SUP

R98
27K SM

Q47
2SC2547

Rout

Send

4V7 400MW
R175

R173

470R SM
Q_54 22P SM

BAS16W SM

BAS16W SM

D28

Raw

X1
C11

2K7 1W CF

Pre-Amp Out

Break

-SUP
RVProt

D

Q_33

1M0 SM

R201N

R142

Q_53
D30
R190

REMOTE
L829CT5_6.SCH

4K7 SM

22P SM

C82 Q_27

R147
Q_14
D20

RLY 51SB12T

1N4003F

1N4003F
RLY5NC

D26N

RLY SPST SPKR
D24

RLY SPST SPKR

Speakers 2

1N4003F
RLY4B

RLY3B

RLY SPDT 24V
D25
2K7 1W CF

2WVERTJUMPER

Soft Start

RLY6B

RLY2B
RLY SPST SPKR

1
2

RLY1B

Speakers 1 1N4003F

D23

33K SM

R126

33K SM

R127

27K SM

27K SM
R185

R31

120K SM

R218

PL1

R200

RLY SPST SPKR

+SUP

BAS16W SM

STBY/POWER

R100

R

G

C81

LED1P
LED RED/GRN

C

8

Rout

470R SM

Lout

D

Pwrok

7

RF Protection

L836CA

Fit Jumper to PL1 for
test power-up from
external d.c. supply

6

LK9X
4
3
2
1

4K7 SM

2

470K SM

1

5

6

PCB Issue 2 to 3 changes

6

DESCRIPTION OF CHANGE
Drawn by:

Sheet 4 of 5

SJB
7

DRAWING NO.

ISSUE

L829CT2
8

A

2

RemRaw

Raw

C98

Q_39
Q31
BC849B

Q_67
+5V
O1

220P SM
R28

+UREG
!

10K SM
R83

R227
10K SM

R223

10K SM

+ C83
100U EL

REMJK2
Q_65

TLP181 SM

Far from PCB
JACK3.5X2

Q37
BC849B

27MH

R198

L3
10N SM

Q_68

4K7 SM

470R 1W CF
REMJKO1

Near to PCB
JACK3.5X2 SK10A

C

Remote Out

Send

1K5 SM

R212

+5V

Demod

4K7 SM

Q61
BC849B

R211

10K SM

R236

Z13B

Q62 BC849B

Remote Buffer

Demod

6
LM393A SM

B

8

1K8 SM

+5V
R238

1N0 SM

C93

B

3

Break

7
Q_38

4

D

SK10B

Q_66

Q_2

+5V

5

R226

1

R221

Q57
BC859B

Q_40

Q_37

Carrier Demodulator

680P PP
C92

1K8 SM
1K5 SM

C91

R239
R237

100K SM

R222

Q_34

10K SM

100K SM

Q_36

LM393A SM

R210

R220

3

10K SM

Carrier Filter

1

1K5 SM
R80

2

C

6

Remote In

R209

Z13A

4K7 SM

R225

10R FU

Q_35

REMJK1

R213
47R SM

D

+5V

4

3

100R SM

1

Z13C
LM393A SM
4

C97
100N SM

DRAWING TITLE

97_1085 SJB

22-9-97

Hardware Remote RX

2

Alpha 10 Amp Remote Bus

97_1086 SJB

26-9-97

No Change

3

97_1096 SJB

22-10-97

R210, R198, R212 change

4

97_1102 SJB

11-11-97

No Change

5

23425

A

Circuit Diagram
Notes:

A

A & R Cambridge Ltd.
Pembroke Avenue
98_1042 SJB
9-7-98
Denny Industrial Centre
ECO No. INITIALS
DATE
Waterbeach
Date Printed
Filename
Cambridge CB5 9PB
10-Jul-1998
J:\PROJECTS\A10amp\L829pb_Main_PCB\Circuits_&_PCB\wip\L829CT5_6.SCH
1

2

3

PCB Issue 2 to 3 changes

6

DESCRIPTION OF CHANGE
Drawn by:

SJB

Sheet 5 of 5

ISSUE

DRAWING NO.

4

L829CT5

1

5

P4

+5V

P12

RIN

THRU_PIN THRU_PIN THRU_PIN THRU_PIN THRU_PIN

O/P
GND Case

+8V
RST
PWRLED
STBYLED
REQ
SDA
SCL

FFC22H

LK1013

LK1019

LINK10NP
LK1008

LINK10NP
LK1014

LINK10NP
LK1020

LINK10NP
LK1003

LINK10NP
LK1009

LINK10NP
LK1015

LINK10NP
LK1021

LINK10NP
LK1004

LINK10NP
LK1010

LINK10NP
LK1016

LINK10NP
LK1022

LINK10NP
LK1005

LINK10NP
LK1011

LINK10NP
LK1017

LINK10NP

LINK10NP
LK1006

LINK10NP
LK1012

LINK10NP
LK1018

LINK10NP

LINK10NP

LINK10NP

1

BARCODE LABEL
BARCODE_A10_DISP
DD

I

3R3R FU

Vin

DATA
C1
100N CD

LOAD

+5V

Z1
7805

R1

Vout

PD100 PD101
TOOLINGTOOLING

O
PWRLED
+

+ C6
220U EL

C3
100N CD

C2
470U EL 25V

VFD_D3
VFD_D2
VFD_D1
VFD_D0

R13
150R MF
LK3
3
2
1

VFD_E
VFD_RS

CLOCK
GND

+5V

ROW1

LED GREEN

+5V

COL1

150R MF

R16
4K7 MF

D6
LED2

1N4148

R3

GND
B

D7

LED GREEN

LED100

STBYLED

LK2
3
2
1

1N4148

LED3
SW4
TACTSW2

GND

Q2
ZVNL120

COL3
COL2
COL7
COL6
COL5
COL4

R4

REQ R18
100R MF

COL3
COL4

SCL R19
100R MF VFD_RS
COL1

D1
ROW2

SW5
TACTSW2

GND
D9

COL5

GND

R6
150R MF
COL6

A

D11

TAPE2_2 TAPE2_2

TAPE1_1 TAPE1_1

SOURCE_0SOURCE_0

TAPE1_2 TAPE1_2

SOURCE_1SOURCE_1

TAPE2_0 TAPE2_0

SOURCE_2SOURCE_2

COL7

SW7
TACTSW2

D4

23425

1N4148

LED GREEN

A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB

150R MF

STBYLED STBYLED

RIN

DATA DATA

ROUT

CLOCK CLOCK

A

Circuit Diagram
PHIL

Sheet 1 of 1

3

4

5

15/5/97

2-Oct-1998

J:\PROJECTS\A10amp\CIRCS\display\L831ct_1.schDRAWN

2

REQ

DRAWING TITLE

Filename
1

SDA

SDA

REQ

ALPHA 10 AMP DISPLAY

R8

GND

SCL

SCL

** SOCKETED **

TAPE2_1 TAPE2_1

SW11
TACTSW2

150R MF

LED7

1N4148

SDA

R_OUT

1N4148
R7

LED GREEN

B

R_IN

D3

LED6
GND

TAPE2_0
TAPE2_1
TAPE2_2
TAPE1_0
TAPE1_1
TAPE1_2
DATA
R21
LOAD 100R MF
CLOCK

LED RED/GRN

LOAD LOAD

SW10
TACTSW2

D10
1N4148

R

PHASE_B
PHASE_A
ROW1
ROW2
SOURCE_0
SOURCE_1
SOURCE_2
ROUT

40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21

1N4148
SW6
TACTSW2

LED GREEN

100N CD
C4
100N CD

TAPE1_0 TAPE1_0
D2

LED5

1N4148

MCLR
RB7
RA0
RB6
RA1
RB5
RA2
RB4
RA3
RB3
RA4/T0CKI
RB2
RA5/SS
RB1
RE0/RD
RB0/INT
RE1/WR
VDD
RE2/CS
VSS
VDD
RD7/PSP7
VSS
RD6/PSP6
OSC1/CLKIN
RD5/PSP5
OSC2/CLKOUT
RD4/PSP4
RC0/T1OSI/T1CKI
RC7
RC1/T1OSO
RC6
RC2/CCP1
RC5/SDO
RC3/SCK/SCL RC4/SDI/SDA
RD0/PSP0
RD3/PSP3
RD1/PSP1
RD2/PSP2

C5

SW9
TACTSW2

R5

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

PIC16C65

1N4148

150R MF

LED GREEN

COL2
COL3
VFD_D3
VFD_D2

VFD_D1
VFD_D0
VFD_E

X1
CST4.00

SW8
TACTSW2

LED4

1N4148

COL4
COL5
COL6
COL7

RP1
100K X 8 COM

150R MF

LED GREEN

D8

2
3
4
5
6
7
8
9

G

Z2

COL2

150R MF
SW3
TACTSW2

C

L815CA

L815CA

RST

1
R15
4K7 MF

PD7
PD8
TOOLING TOOLING
PD9
TOOLING

R14
330R MF

R17
10K MF

R22
100K MF

ROW2

R20
100K MF

PD3
PD4
TOOLING TOOLING

NEAR Z1, Z2

ROW1

R2

PD10
TOOLING

PD1
PD2
TOOLING TOOLING

+5V

SW2
TACTSW2

R12
10K MF

PD11
PD12
PD13
PD14
PD5
PD6
TOOLINGTOOLINGTOOLINGTOOLING
TOOLING TOOLING

Itron VFD Module

4K7 MF

GND

DRILL_DETAIL

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

+8V

+5V

R9

1N4148

DD_ISSUESML

D

R11
10K MF

3
GND
VCC
NC
RS
R/W (WR)
E (RD)
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7

FOLD Z1 FLAT TO BOARD

+8V

LED1

Drilling
Detail

PHASE_B

FFC22H

D5

DD2

Drilling Detail
Issue Box

PHASE_A

PCB SILK SCREEN).

SW1
TACTSW2

Update Box
(Small)
UPDATE_SML

SK3
ALPS_ENCODER

M1
ITRON_VFDM

SOURCE_0
SOURCE_1
SOURCE_2
TAPE2_0
TAPE2_1
TAPE2_2
TAPE1_0
TAPE1_1
TAPE1_2

GND

RIN
ROUT

SK2
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1

RX1
SBX1610-52

G

SK1
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1

LK1007

LINK10NP
LK1002

+5V

4K7 MF

2

C8
100N CD

TO PREAMP

Q1
BC557B

R10

+5V

TO POWER AMP

LK1001

UDB

L831PB

2

P13

D

C

1

3

P11

8
EL1

PCB
LK1 CUT LK1 TO DISABLE IR RECEIVER
10MM LINK

THRU_PIN THRU_PIN THRU_PIN THRU_PIN
P10

7
L831PB

THRU_PIN THRU_PIN THRU_PIN THRU_PIN
P5
P6
P7
P8

P9

6

B
A

P3

4

2
1

P2

3

C

P1

2

BY

CHK BY
6

ECO No.

L831CT
DESCRIPTION OF CHANGE

DATE
7

1

DRAWING NO. ISSUE

8

2

3

R24 22K SM

AVR

1K0 SM
PHONO4G

SK2B

C20
47P SM

AVR

C21
47P SM

Aux2L Tape2_0
Tape2_1
Tape2_2

AUX2L

R25

F

N

PlugL

8
7

R53 22K SM

-7V2

B

SK3A
1

C23
47P SM

Tape1IL

R27

EMC

PlugR

R55 22K SM
N

R28 22K SM

TAPE1IR

1K0 SM
C24
47P SM

1

TAPE2IL

EMC

Tape2IL

1
2
3
4
5
6
7
8

R29

TAPE2IR

R30 22K SM
1K0 SM

16
14
12
10
8
6
4
2

DIL16 VPLG
1

Aux1R

L

Aux1L

Aux1R
CDR
TunerR
AVR
Aux2R
Tape1IR
Tape2IR
PlugR

13
14
15
12
1
5
2
4

Source_0
Source_1
Source_2

6
11
10
9
8
7
-7V2

1

Tape2IR

Aux1L

VDD

3

X

Z4B
OPA2134PA SM
5
Null_R

20
19
18
17
16
15
14
13
12
11

+6V8

C4

+6V8

-7V2

OPA2134PA SM

8
4

8
4

D2
C32 +
6V8 400MW
22U EL

+

22U EL

LK2 +15V
1
2
3
4
5
6
7
8

GND

C

C9
L832CA
1N0 SM

R4
56R SM

NAN1

NASW1 R2

-7V2

R5
1K8 SM

C3

R7
6
100K SM

10U NP

Data

INH
A
B
C

R34

Clock
Load

R33

1K0 SM

1K0 SM

R32
1K0 SM

C38

R77

LGND

100R SM

1N0 SM

GND
VEE

R31
1K0 SM

MAX4051 SM
QPAD
QPAD
QPAD
QPAD
QPAD
QPAD
QPAD
QPAD
QPAD

Q_11
Q_10
Q_9
Q_14
Q_13
Q_12
Q_17
Q_16
Q_15

Tape1_2
Tape1_1
Tape1_0
Tape2_2
Tape2_1
Tape2_0
Source_2
Source_1
Source_0

R75
R73
R71
R69

FIDUCIAL
TL1
TOOLING

TL2
TOOLING

1K0 SM

-7V2

TL3
TOOLING

TL4
TOOLING

100K SM
100K SM
100K SM
100K SM

R76
R74
R72
R70
R68

100K SM
100K SM
100K SM
100K SM
100K SM

SK7
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1

CLOCK
LOAD
DATA

DGND

SOURCE_2
SOURCE_1
SOURCE_0
TAPE2_2
TAPE2_1
TAPE2_0
TAPE1_2
TAPE1_1
TAPE1_0

FFC22V

SK8
FFC32V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

-15V

Aux1L
Aux1R
CDL
CDR

B

TunerL
TunerR
AVL
AVR
Aux2L
Aux2R
Tape1IL

Drilling
Detail

Tape1IR
Tape2IL

BARCODE LABEL

Update Box

Tape2IR

PLUGINL
PlugL

DD1

PlugR

PCB
PLUGINR

23425

L832PB

Drilling Detail
Issue Box

Photo Strip

DD_ISSUE

A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB

1K0 SM
C14

DRAWING TITLE

A

A10 Amp Pre-Amp PCB
TL5
TL6
TOOLING_BIG TOOLING_BIG

R18 22K SM

Aux1R

Circuit Diagram
Sheet 1 of 1
Filename

L832CT
2-Oct-1998

DRAWN
J:\PROJECTS\A10amp\CIRCS\PREAMP\L832ct_1.sch

Phono PCB
2

6K8 SM1%

7

47P SM

L823CA

C8
1N0 SM

LM1972
X0
X1
X2
X3
X4
X5
X6
X7

R45 22K SM

PHONO2G

D1
6V8 400MW C31
22U EL +

R17
R44 1K0 SM

AUX1R

GND AC
IN2
OUT1
GND2
GND1
VEE1
IN1
OUT2
GND AC
GND AC
GND AC
VDD2
VEE2
GND AC
LOGIC GND
VDD1
CLOCK
DATA OUT
LOAD/SHIFT DATA IN

-7V2

FD_2

FIDUCIAL

AUX1L

OPA2134PA SM

R38

FD_1

Pre-Amp Audio Output

R67

+6V8
16

S.J.B.

SK5

47P SM
PH15P
PHGND1
PHOR
PHGND2
PHGND3
PHOL
PHGND4
PH15N

R

EMC

15
13
11
9
7
5
3
1

C26
LK1X
8
7
6
5
4
3
2
1

MAX4051 SM

C13
47P SM

1N0 SM

PHONO4G
PL6

A

10U NP

GND
VEE

+15V

47R SM
ROUT

OPA2134PA SM

Z14
1
2
3
4
5
6
7
8
9
10

+ C2
22U EL

R63

7
6

R66

-15V

C37

1N0 SM

R57 22K SM
N

8
7

5

6K8 SM1%

INH
A
B
C

+15V

LK1
L823CA

R56 1K0 SM

F

6
11
10
9

Tape1IR

C25
47P SM

SK4A

Source_0
Source_1
Source_2

Z3B

47R SM
OPA2134PA SM

Z13C
TL072 SM

Z6
-15V
-15V
MAX4051 SM +6V8
16
X0
VDD
Z4A
X1
3
Null_L 3
X2
X
1
X3
R6
2
X4
100K SM
X5
OPA2134PA SM C1
X6
X7

Z7

GND
VEE

-7V2

13
14
15
12
1
5
2
4

LOUT

R62

1

-7V2

INH
A
B
C

8
7

Aux1L
CDL
TunerL
AVL
Aux2L
Tape1IL
Tape2IL
PlugL

SETOFF

MAX4051 SM
Z11
+6V8
16
X0
VDD
X1
3
X2
X
X3
X4
X5
X6
X7

6
11
10
9

Tape2_0
Tape2_1
Tape2_2

R54 1K0 SM

F

1N0 SM

C35

Aux2R

TAPE1IL

PHONO4G

C36

C22
47P SM

GND
VEE

13
14
15
12
1
5
2
4

Aux1R
CDR
TunerR
AVR
Aux2R
Tape1IR

1K0 SM
PHONO4G

INH
A
B
C

R52 1K0 SM

R26 22K SM

AUX2R

6
11
10
9

+15V

To Plug-in PCB

N

13
14
15
12
1
5
2
4

Aux1L
CDL
TunerL
AVL
Aux2L
Tape1IL

R51 22K SM

Z12C
TL072 SM

MAX4051 SM
Z10
+6V8
16
X0
VDD
X1
3
X2
X
X3
X4
X5
X6
X7

-15V

D

Z3A
3

+15V

2

GND
VEE

-7V2

PHONO4G

680P PP

EMC

8
7

R50 1K0 SM

Q_4
QPAD

INH
A
B
C

AVL

R23

F

1N0 SM

C34

AVL

47R SM
TL072 SM

-15V

R3
56R SM

PASW1

680P PP

C19
47P SM
1

C

Tape1_0
Tape1_1
Tape1_2

7

Z3C

1K0 SM PAN1

TAPE2OR

R61

6

QPAD

Z4C

R1

N

5

C10

47P SM

SK2A

6
11
10
9

TunerR

Z13B

Q_21

+6V8

C11

1K0 SM
C18

PHONO4G

Tape2IR
PlugR

F

Q_3
QPAD

R65

R22 22K SM

TUNERR

47R SM
TL072 SM

1K5 SM1%

N

2

QPAD

+15V

TAPE2OL

R60

1

R64

R49 22K SM

SK4B

3

MAX4051 SM
Z9
+6V8
16
X0
VDD
X1
3
X2
X
X3
X4
X5
X6
X7

1K5 SM1%

R48 1K0 SM

F

13
14
15
12
1
5
2
4

Aux1R
CDR
TunerR
AVR
Aux2R

Q_20

8

R21

Q_2
QPAD

Z13A

8

TUNERL

-7V2

PHONO4G

4

SK1B

TunerL

TAPE1OR

47R SM
TL072 SM

GND
VEE

10K SM

C17
47P SM

6

4

8
7

+15V

R59

7
QPAD

22K SM

47P SM

INH
A
B
C

F

N

5

R14

CDR

8

Q_1
QPAD

Z12B

Q_19

R80

C16

7

TAPE1OL

47R SM
TL072 SM

22K SM

Tape1_0
Tape1_1
Tape1_2

1K0 SM
PHONO4G

6
11
10
9

R58

1
2

QPAD

R81

R20 22K SM

CDR

6

SK3B

3

R39

N

Z12A

Q_18
3

X

R40

EMC

Tape2IL
PlugL

R47 22K SM

5

+6V8
16

100K SM

R46 1K0 SM

VDD

100K SM

R19

F

1N0 SM

C33
D

CDL

X0
X1
X2
X3
X4
X5
X6
X7

R41

1

13
14
15
12
1
5
2
4

Aux1L
CDL
TunerL
AVL
Aux2L

CDL

100K SM

Z8
C15
47P SM

SK1A

4

100K SM

1

3

4

5

BY

CHK BY
6

ECO No.

DESCRIPTION OF CHANGE

DATE
7

1

DRAWING NO. ISSUE

8



Source Exif Data:
File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.2
Linearized                      : No
Creator                         : G:TEXT...A10PPTS.MA           [PFP#1080144465]
Create Date                     : 02 October 1998 16:08
Title                           : ALPHA 10/10P SERVICE MANUAL
Author                          : Unknown
Producer                        : Acrobat PDFWriter 3.02 for Windows
Subject                         : 
Modify Date                     : 2000:09:07 16:16:45
Page Count                      : 19
EXIF Metadata provided by EXIF.tools

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