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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 low-
impedance 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 50% 49% 52%



Bias correct Under Biassed Over Biassed

Figure 2 Auto-bias under dynamic conditions
2
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




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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
1 2 3 4 5 6 7 8

4 +SUP
HP1 R4 PSUP1
Pre-Amp Audio Input Fault
L
5 LOut
SK11 +15V VI Cut-out latch SK5 330R 1W CF
Q60
1 2 ! ! ATE_PAD
BC859B SGND1 R224 LHC HP2 R5




470R FU
10U EL
47K SM




1R0 FU
2 + 3 ROut




1R0 FU
!




10U EL
RHC




C95




C22
3 1 330R 1W CF
Q7




R36
+ 10R MF




100R W2 CF


100R W2 CF




R3
R1




R7
4 ATE_PAD
BC856B
5 HPSKT 6 D1




R49
6 7




R6
R208 VIRESET1