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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
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
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