Arcam-7R-8R-8P-int-sm[1]

ALPHA ONE/7R/8R/8P AMPLIFIER SERVICE MANUALALPHA ONE/7R/8R/8P AMPLIFIER SERVICE MANUAL

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Arcam Alpha One/ 7R/ 8R/ 8P Amplifier Service Manual

Issue 1 Serial Number 001 - (Paul Newton/ Haider Bahrani Sept ‘98)

Circuit Description

The Alpha One / 7R/8R and 8P share a commonpcb. The circuits are very similar and the maindifferences are the remote volume facility and extrapower output on the 7R and 8R and a switch tobypass the phono stage to enable its use as an extraline level input and the AV processor switch on theAlpha 8R integrated amplifier. The 8P poweramplifier utilises the same power amplifier circuit asthe Alpha 8R integrated amplifier.

Power Supplies

The ac output of the toroidal mains transformer isrectified and smoothed by D201-204 and C204, 205.This is then regulated to +/-15V by Z201, 202 topower the phono and tone control stages and thed.c. servo.

The Alpha 7R and 8R transformers have an extratapping which is used for the remote volume circuit.The ac in is regulated to 5V by zener D902 andassociated components and this is then used topower the microcontroller Z901 and remote receiver.

Phono Stage (Not applicable to Alpha One)

The phono stage consists of a dual opamp Z305, oneopamp per channel. The RIAA equalization isachieved by the feedback components R703, 704,702 and C704, 705, 702 on left channel (R603 etc.as above for Right channel). R703 determines thegain and C703 the low frequency roll off.

On the Alpha 8R this stage can be bypassed by useof switch SW302 to enable use as an extra line input.

Tone Controls

The tone control stage is based around Z304 a dualop amp.The range of the controls is set by R507, 508 for thebass pot RV302 and R509, 510 for the treble potRV303.The tone controls and balance pot can be bypassedby use of the direct switch, SW304.

Power Amplifier

The input to the power amplifier from previous stagesis fed to the differential input of Q112 and Q113. Q110 and Q111 form a constant current

source for the differential input stage.

The output devices are 'n' channel mosfets SMF045.Zener diodes D103,104 limit the voltage swing withinsafe limits for the output devices & fusible resistorsR105, 106 provide overcurrent damage to thedevices.

A proportion of the output current appears across theprotection network R41,42. If this becomes too highQ17 is turned on and mutes the output. High D.C.levels at the output will also mute the output. Thereare no output fuses on the Alpha One, 7R and8R/8P amplifiers. The muting is done by the mute icZ303 and its associated compontents. The muteoperates on switch on/off and if an over current orover voltage condition occurs. The power led glowsamber when the mute circuit is operative and glowsgreen in normal use.

Removing the Alpha One/ 7R/ 8R/ 8P Transformer

The toroidal transformer is extremely well secured tothe main pcb with a double sided adhesive gasket.To remove the transformer you must break thisadhesive bond by cutting through the gasket. Thiswill be easier if the transformer is warm.Use a cheese wire under the transformer, pullingbackwards and forwards under tension to graduallycut through. Once most of the adhesive is cut, youshould be able to pull the transformer away from thepcb.

A less satisfactory substitute for cheese wire is to usesome 22 gauge tinned copper wire, stretched first toremove kinks, and two temporary handles.

Alpha One/7R/ 8R/ 8P Quiescent Current (IQ)Settings

When replacing the output transistors of the aboveamplifiers it is important to reset the quiescentcurrent (IQ) to the correct value to prevent theamplifier blowing again.

The IQ should be checked and set by following theprocedure below:

From cold and with no load or signal connectedTurn both IQ presets (RV1 and RV101) down tominimum (fully anticlockwise) and set the voltagedrop across resistor R1 (R101 for right hand channel)to between 3.0 and 3.5mV for the Alpha One and 7R


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amps or between 2.3 and 2.8mV for the Alpha 8R/8Pamps.

Leave the unit for 1 minute and reset to these valuesif required.

Leave the unit for a further 5 minutes and reset ifrequired.

The IQ is now set and the unit can be connected tospeakers and fully checked out.

Disassembly For Servicing

1. Remove the top cover and front panel.2. Remove 2 screws securing the sub front to the

chassis sides and 3 screws holding thesubfront to the chassis base.

3. Remove 1 screw holding the pcb to thechassis. This can be found near to the mainsinlet socket.

4. Remove 5 screws from the rear panel, one ateach end and 3 along the bottom edge.

5. Remove the transformer bolt.6. Release the PCB pillar located near to the

serial number on the pcb.

The pcb, with the rear panel, transformer andsubfront attached, can now be pulled backwards outof the unit.

TEST POINT VOLTAGES

Test Point DC Voltage Alpha One DC Voltage Alpha 7R DC Voltage Alpha 8R/8P

1 32.8V 35V 37V

2 27.8V 29V 31V

3 15V 15V 15V

4 -32.8V -35V -37V

5 27.8V -29V -31V

6 -15V -15V -15V

7 N/A 0.09V 0.09V

8 N/A 0.10V 0.10V

9 0.3V 0.27V 0.27V

10 3.4V 3.2V 2.9V

11 32.8V 35V 37V

12 -3V -2.7V -2.5V

13 32.8V -35V -37V

Between 14 & 15 3.0 -3.5mV 3.0-3.5mV 2.3-2.8mV

16 (protection off) 0.0V 0.0V

16 (protection on) 0.6V 0.6V

17 0.0V 0.0V

18 0.0V 0.0V

19 0.0V 0.0V


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Test Point DC Voltage Alpha One DC Voltage Alpha 7R DC Voltage Alpha 8R/8P

20 0.0V 0.0V 0.0V

21 (protection off) 1.6V 1.6V 1.6V

21 (protection on) 5.0V 5.0V 5.0V

22 0.58V 0.17V 0.17V

23 3.4V 3.1V 3.1V

24 -3V -2.7V -2.7V

25 -26V -29V -29V

Between 26 & 27 3.4mV 3.4mV 2.5mV

28 (muted) 35V 35V 35V

28 (protection off) 1V 1V 1V

29 N/A 5V 5V

30 N/A 10.5 10.5V

31(volume going up)

N/A 0V 0V

31(volume going down)

N/A 5V 5V

32(volume going up)

N/A 0V 0V

32(volume going down)

N/A 5V 5V

PARTS LISTS

The parts for all the units are as the Alpha 7 except where shown.

REF Description Part No Product

C1 ELST 100U 100V 2N710B 7R

C2 PEST 47N 63V 10% 2K347 7R

C3 PCRB 100N 100V 5% RA5mm

2H410 7R

C4 PEST 47N 63V 10% 2K347 7R

C5 PSTY 33P 160V ENCAP1PF%

2F033 7R

C7 PPRO 4N7 63V 5% RA 2D247N 7R

C8 PPRO 100P 63V 5% RA 2D110N 7R

C9 ELST 100U 25V 2N710 A1

C10 ELST 22U 20V OSCON 2P622 7R

C10 ELST 22U 63V ELECT 2N622 A1

C11 ELST 100U 100V 2N710B 7R

C12 ELST 100U 100V 2N710B 7R

C13 PEST 15N 63V 10% 2K315 7R

C14 PEST 15N 63V 10% 2K315 7R

C15 SUPPR CAP 4N7 250V 2K247 7R

C16 ELST 100U 25V 2N710 7R

C17 CERD 470P 63V 20% RA 2A147 7R

C18 CERD 1N0 63V 20% RA 2A210 7R

C19 ELST 100U 25V 2N710 7R

C20 CERD 470P 63V 20% RA 2A147 7R

C21 CERD 10N 63V 20% RA 2A310 7R

C22 CERD 10N 63V 20% RA 2A310 7R


C24 PPRO 4N7 63V 5% RA 2D247N 7R


2H410 7R


2H410 7R

C27 ELST 220U 16V 2N722 7R


2H410 7R


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C29 ELST 1U0 50V 20% RA 2N510 8R

C30 ELST 22U 63V ELECT 2N622 7R

C30 ELLL 47U 10V ELECT 2R647 A1

C30 ELEC 10U 25V CERAFINE 2P610CC 8R

C101 ELST 100U 100V 2N710B 7R

C102 PEST 47N 63V 10% 2K347 7R

C103 PCRB 100N 100V 5% RA5mm

2H410 7R

C104 PEST 47N 63V 10% 2K347 7R

C105 PSTY 33P 160V ENCAP1PF%

2F033 7R

C107 PPRO 4N7 63V 5% RA 2D247N 7R

C108 PPRO 100P 63V 5% RA 2D110N 7R

C109 ELST 100U 25V 2N710 A1

C110 ELST 22U 20V OSCON 2P622 7R

C110 ELST 22U 63V ELECT 2N622 A1

C111 ELST 100U 100V 2N710B 7R

C112 ELST 100U 100V 2N710B 7R

C113 PEST 15N 63V 10% 2K315 7R

C114 PEST 15N 63V 10% 2K315 7R

C116 ELST 100U 25V 2N710 7R

C117 CERD 470P 63V 20% RA 2A147 7R

C118 CERD 1N0 63V 20% RA 2A210 7R

C119 ELST 1U0 50V 20% RA 2N510 7R

C120 CERD 470P 63V 20% RA 2A147 7R

C121 ELST 1U0 50V 20% RA 2N510 7R

C122 ELST 100U 25V 2N710 7R

C123 ELST 100U 25V 2N710 7R

C124 PPRO 4N7 63V 5% RA 2D247N 7R

C125 PCRB 100N 100V 5% RA5mm

2H410 7R

C126 PCRB 100N 100V 5% RA5mm

2H410 7R

C127 ELST 220U 16V 2N722 7R

C128 PCRB 100N 100V 5% RA5mm

2H410 7R

C130 ELST 22U 63V ELECT 2N622 7R

C130 ELLL 47U 10V ELECT 2R647 A1

C130 ELEC 10U 25V CERAFINE 2P610CC 8R

C200 CERD 1N0 63V 20% RA 2A210 7R


C204 ELST 10m 50V RA 32mm 2N910 7R

C204 ELST 6M8 35V RA 2N868 A1

C205 ELST 10m 50V RA 32mm 2N910 7R

C205 ELST 6M8 35V RA 2N868 A1

C206 PCRB 100N 100V 5% RA5mm

2H410 7R

C207 PCRB 100N 100V 5% RA5mm

2H410 7R

C208 PPRO 4N7 63V 5% RA 2D247N 7R

C209 PPRO 4N7 63V 5% RA 2D247N 7R

C210 ELST 10U 50V 2N610 7R

C211 ELST 10U 50V 2N610 7R

C212 CERD 10N 63V 20% RA 2A310 7R

C213 CERD 10N 63V 20% RA 2A310 7R

C214 CERD 10N 63V 20% RA 2A310 7R

C215 CERD 10N 63V 20% RA 2A310 7R

C216 CERD 10N 63V 20% RA 2A310 7R

C217 CERD 10N 63V 20% RA 2A310 7R

C301 CERD 10N 63V 20% RA 2A310 7R

C302 CERD 10N 63V 20% RA 2A310 7R

C502 PCRB 100N 100V 5% RA5mm

2H410 A1

C303 CERD 1N0 63V 20% RA 2A210 7R

C304 CERD 1N0 63V 20% RA 2A210 7R

C305 CERD 47P 63V -20% +80%RA

2A047 7R

C306 CERD 47P 63V -20% +80%RA

2A047 7R

C401 ELST 10U 50V 2N610 7R

C402 PEST 220N 63V 10% 2K422 7R

C402 PCRB 100N 100V 5% RA5mm

2H410 A1

C403 PCRB 100N 100V 5% RA5mm

2H410 A1

C403 PEST 220N 63V 10% 2K422 7R

C404 PPRO 4N7 63V 5% RA 2D247N 7R

C404 2N2 PP 2D222 A1

C405 ELST 10U 50V 2N610 7R

C406 CERD 100P 63V 20% RA 2A110 7R

C407 CERD 100P 63V 20% RA 2A110 7R

C408 CERD 10P 63V 20% RA 2A010 7R

C501 ELST 10U 50V 2N610 7R

C502 PEST 220N 63V 10% 2K422 7R

C503 PEST 220N 63V 10% 2K422 7R

C503 PCRB 100N 100V 5% RA5mm

2H410 A1

C504 PPRO 4N7 63V 5% RA 2D247N 7R

C504 2N2 PP 2D222 A1

C505 ELST 10U 50V 2N610 7R


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C506 CERD 100P 63V 20% RA 2A110 7R

C507 CERD 100P 63V 20% RA 2A110 7R

C508 CERD 10P 63V 20% RA 2A010 7R

C601 PPRO 100P 63V 5% RA 2D110N 7R

C602 CERD 47P 63V 20% RA 2A047 7R

C603 ELST 22U 63V 2N622 7R

C604 PPRO 4N7 63V 5% RA 2D247N 7R

C605 PPRO 1N3 63V 5% RA 2D213N 7R

C606 ELST 10U 50V 2N610 7R

C701 PPRO 100P 63V 5% RA 2D110N 7R

C702 CERD 47P 63V 20% RA 2A047 7R

C703 ELST 22U 63V 2N622 7R

C704 PPRO 4N7 63V 5% RA 2D247N 7R

C705 PPRO 1N3 63V 5% RA 2D213N 7R

C706 ELST 10U 50V 2N610 7R

C801 PPRO 100P 63V 5% RA 2D110N 7R

C802 PPRO 100P 63V 5% RA 2D110N 7R

C803 ELST 10U 50V 2N610 7R

C804 ELST 10U 50V 2N610 7R

C805 CERD 10N 63V 20% RA 2A310 7R

C806 CERD 10N 63V 20% RA 2A310 7R

C901 CERD 10N 63V 20% RA 2A310 7R

C902 ELST 220U 16V 2N722 7R

C903 CERD 10N 63V 20% RA 2A310 7R

C904 CERD 10N 63V 20% RA 2A310 7R

C905 CERD 10N 63V 20% RA 2A310 7R

C906 CERD 10N 63V 20% RA 2A310 7R

C907 ELST 1M0 25V 2N810 7R

C1000 CERD 10N 63V 20% RA 2A310 7R

CL1 ALPHA AMP 7/8 HEATSINKCLAMP

E82201 7R

CL2 ALPHA AMP 7/8 HEATSINKCLAMP

E82201 7R

D1 RECTIFIER 1N4003F 1A200V

3B4003 7R

D2 ZENER 10V 400MW 3C11004 7R

D3 ZENER 10V 400MW 3C11004 7R

D4 ZENER 10V 400MW 3C11004 7R

D5 SSDIODE 1N4148 75V 3A4148 7R


3B4003 8R

D7 SSDIODE 1N4148 75V 3A4148 7R


3B4003 7R


3B4003 7R

D10 ZENER 5V6 400MW 3C05604 8R


3B4003 7R

D102 ZENER 10V 400MW 3C11004 7R

D103 ZENER 10V 400MW 3C11004 7R

D104 ZENER 10V 400MW 3C11004 7R


3B4003 7R


3B4003 7R


3B4003 7R

D108 ZENER 5V6 400MW 3C05604 7R

D201 ULTRAFAST RECTIFIERDIODE UF5403 3A

3B5403F 7R


3B5403F 7R


3B5403F 7R


3B5403F 7R

D801 ZENER 5V6 400MW 3C05604 7R

D802 ZENER 4V7 400MW 3C04704 7R

D803 SSDIODE 1N4148 75V 3A4148 7R


3B4003 7R

D902 ZENER 5V6 400MW 3C05604 7R


3B4003 7R

D904 ZENER 5V6 400MW 3C05604 7R

D905 SSDIODE 1N4148 75V 3A4148 7R

EL1 FUSE CLIP WCK-180-01A F062 7R

FS201 INS COVER PCBFUSEHOLDER

F022 7R

FS201 FUSE 20mm 1.25A AS C12126 7R

FS201 FUSEHOLDER 20mm PCB 8S004 7R

FS202 FUSEHOLDER 20mm PCB 8S004 7R

FS202 INS COVER PCBFUSEHOLDER

F022 7R

HS1 ALPHA AMP 7/8 HEATSINK E81801 7R

HS1 SIL PAD - 25 X 12.5mm E817MC 7R

HS1 ALPHA AMP 7/8 HS CLIP E810MC 7R






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L1 INDUCT 2U2 12x20mm 7D002B 7R

L101 INDUCT 2U2 12x20mm 7D002B 7R

LED201 LED RED/GREEN 5MM 3D002 7R

LK19 RES MF W4 3K3 1% 1H233 7R

LK19A A8R AMP MBD TO AVSWITCH CABLE

L835CA 8R

LK20 RES MF W4 3K3 1% 1H233 7R

LK311 7-WAY RIBBON 250mm L825CA 7R

LK805 JUMPER 3 WAY x 125mm L815CA 7R

LK901 JUMPER 8-WAY LEAD L809CA 7R

LK902 JUMPER 3 WAY x 125mm L815CA 7R

MS MAINS SWITCH SPACER E66901 7R

PCB PRINTED CIRCUIT BOARD L846PB 7R

Q1 TRANS PWR MOSFETIRF540/SMF045

4K045 7R


4K045 7R

Q3 TRANS LF SS P BC556B 4A556 7R

Q4 TRANS LF SS N BC546B 4A546 7R

















4K045 7R


4K045 7R

















Q120 TRANS LF SS N 2SC2547 4A2546 7R

PL1 16 WAY DIL PIN HEADER 8K6316 8P

R1A RES MO 3W 5% 0R22KOASPR3

1Q922 7R

R1 RES MO 3W 5% 0R22KOASPR3

1Q922 7R

R2 RES CF W2 4R7 5% 1D847 7R

R3 RES CF W4 5% 2R2 1B822 7R

R4 RES MF FU W3 100R 5%NFR25

1G110 7R


1G110 7R


1G110 7R


1G147 7R


1G147 7R


1G147 7R


1G147 7R


1G147 7R


1G147 7R

R13 RES MF W4 1% 1K0 1H210 7R

R14 RES MF W4 1% 1K0 1H210 7R

R15 RES CF W4 5% 1K0 1B210 7R

R16 RES MF W4 1% 2K7 1H227 7R

R17 RES MF W4 1% 5K6 1H256 7R

R18 RES MF W4 1% 2K7 1H227 7R


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R19 RES CF W4 5% 5K6 1B256 7R

R20 RES MF W4 1% 15K 1H315 7R

R21 RES MF W4 1% 100R 1H110 7R

R22 RES MF W4 1% 120R 1H112 7R

R23 RES MF W4 1% 2K7 1H227 7R

R24 RES MF W4 1% 2K7 1H227 7R

R25 RES MF W4 1% 330R 1H133 7R


1G147 7R


1G147 7R

R28 RES MF W4 18K 1% 1H318 7R

R29 RES MF W4 1% 1K2 1H212 7R

R30 RES MF W4 1% 33K 1H333 7R

R31 RES CF W4 5% 1K0 1B210 A1

R32 RES MF W4 1% 33K 1H333 A1

R33 RES MF W4 1% 680K 1H468 A1

R34 RES MF W4 1% 1K0 1H210 7R

R34 RES MF W4 1K6 1% 1H216 A1

R35 RES MF W4 1% 33K 1H333 7R


1G110 7R

R39 RES MF W4 18K 1% 1H318 7R

R40 RES MF W4 1% 33K 1H333 A1


1G147 7R

R42 RES MF W4 1% 620R 1H162 7R

R43 RES MF W4 1% 22K 1H322 8R

R44 RES MF W4 1% 68K 1H368 7R

R45 RES MF W4 18K 1% 1H318 7R

R46 RES MF W4 1% 150R 1H115 7R

R47 RES MF W4 1% 4K7 1H247 7R

R48 RES MF W4 1% 47K 1H347 7R

R49 RES CF 1W 330R 5% 1E133 7R

R50 RES CF W2 100R 5% 1D110 7R

R51 RES MF W4 1% 15K 1H315 7R

R52 RES MF W4 1% 3K9 1H239 7R

R53 RES MF W4 18K 1% 1H318 7R

R54 RES MF W4 1% 68K 1H368 7R

R55 RES MF W4 1% 22K 1H322 7R

R56 RES MF W4 1% 22K 1H322 7R

R57 RES CF 1W 2K7 5% 1E227 8R

R58 RES MF W4 1% 1K8 1H218 7R

R61 RES MF W4 18K 1% 1H318 7R

R62 RES MF W4 18K 1% 1H318 7R

R63 RES MF W4 1% 56K 1H356 8R

R64 RES MF W4 1% 56K 1H356 8R

R70 RES MF W4 1% 680R 1H168 7R

R101A RES MO 3W 5% 0R22KOASPR3

1Q922 7R

R101 RES MO 3W 5% 0R22KOASPR3

1Q922 7R

R102 RES CF W2 4R7 5% 1D847 7R

R103 RES CF W4 5% 2R2 1B822 7R


1G110 7R


1G110 7R


1G110 7R


1G147 7R


1G147 7R


1G147 7R


1G147 7R


1G147 7R


1G147 7R

R113 RES MF W4 1% 1K0 1H210 7R

R114 RES MF W4 1% 1K0 1H210 7R

R115 RES CF W4 5% 1K0 1B210 7R

R116 RES MF W4 1% 2K7 1H227 7R

R117 RES MF W4 1% 5K6 1H256 7R

R118 RES MF W4 1% 2K7 1H227 7R

R119 RES CF W4 5% 5K6 1B256 7R

R120 RES MF W4 1% 15K 1H315 7R

R121 RES MF W4 1% 100R 1H110 7R

R122 RES MF W4 1% 120R 1H112 7R

R123 RES MF W4 1% 2K7 1H227 7R

R124 RES MF W4 1% 2K7 1H227 7R

R125 RES MF W4 1% 330R 1H133 7R


1G147 7R


1G147 7R

R128 RES MF W4 18K 1% 1H318 7R

R129 RES MF W4 1% 1K2 1H212 7R


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R130 RES MF W4 1% 33K 1H333 7R

R131 RES CF W4 5% 1K0 1B210 A1

R132 RES MF W4 1% 33K 1H333 A1

R133 RES MF W4 1% 680K 1H468 A1

R134 RES MF W4 1% 1K0 1H210 7R

R134 RES MF W4 1K6 1% 1H216 A1

R135 RES MF W4 1% 33K 1H333 7R


1G110 7R

R139 RES MF W4 18K 1% 1H318 7R

R140 RES MF W4 1% 33K 1H333 A1


1G147 7R

R142 RES MF W4 1% 620R 1H162 7R

R145 RES MF W4 18K 1% 1H318 7R

R146 RES MF W4 1% 150R 1H115 7R

R147 RES MF W4 1% 4K7 1H247 7R

R149 RES CF 1W 330R 5% 1E133 7R

R150 RES CF W2 100R 5% 1D110 7R

R151 RES MF W4 1% 15K 1H315 7R

R152 RES MF W4 1% 3K9 1H239 7R

R153 RES MF W4 1% 47K 1H347 7R

R154 RES MF W4 1% 47K 1H347 7R

R155 RES MF W4 1% 47K 1H347 7R


1G147 7R

R157 RES MF W4 1% 100K 1H410 7R

R158 RES MF W4 1% 47K 1H347 7R

R159 RES MF W4 1% 100K 1H410 7R

R160 RES MF W4 10K 1% 1H310 7R

R161 RES CF 1W 1K0 5% 1E210 7R

R161 RES CF 1W 330R 5% 1E133 A1

R162 RES MF W4 1% 47K 1H347 7R

R163 RES MF W4 1% 33K 1H333 7R

R164 RES MF W4 18K 1% 1H318 7R

R165 RES MF W4 1% 47K 1H347 7R

R166 RES CF 1W 2K7 5% 1E227 7R

R167 RES CF 1W 2K7 5% 1E227 7R

R170 RES MF W4 1% 680R 1H168 7R


1G147 7R


1G147 7R


1G147 7R


1G147 7R


1G147 7R


1G147 7R

R207 RES MF W4 1% 100R 1H110 7R

R401 RES MF W4 1% 1K8 1H218 7R

R402 RES MF W4 1% 47K 1H347 7R

R403 RES MF W4 1% 2K2 1H222 7R

R404 RES MF W4 6K8 1% 1H268 7R

R405 RES MF W4 1% 4K7 1H247 7R

R406 RES MF W4 1% 220R 1H122 7R

R406 RES MF W4 470R 1% 1H147 A1

R407 RES MF W4 1% 4K7 1H247 7R

R407 RES MF W4 12K 1% 1H312 A1

R408 RES MF W4 1% 4K7 1H247 7R

R408 RES MF W4 12K 1% 1H312 A1

R409 RES MF W4 3K3 1% 1H233 7R

R409 RES MF W4 6K8 1% 1H268 A1

R410 RES MF W4 3K3 1% 1H233 7R

R410 RES MF W4 6K8 1% 1H268 A1

R411 RES MF W4 1% 4K7 1H247 7R

R411 RES MF W4 10K 1% 1H310 A1

R412 RES MF W4 1% 10K 1H310 7R

R412 RES MF W4 18K 1% 1H318 A1

R415 RES MF W4 3K3 1% 1H233 7R

R416 RES MF W4 1% 1K8 1H218 7R

R501 RES MF W4 1% 1K8 1H218 7R

R502 RES MF W4 1% 47K 1H347 7R

R503 RES MF W4 1% 2K2 1H222 7R

R504 RES MF W4 6K8 1% 1H268 7R

R505 RES MF W4 1% 4K7 1H247 7R

R506 RES MF W4 1% 220R 1H122 7R

R506 RES MF W4 470R 1% 1H147 A1

R507 RES MF W4 1% 4K7 1H247 7R

R507 RES MF W4 12K 1% 1H312 A1

R508 RES MF W4 1% 4K7 1H247 7R

R508 RES MF W4 12K 1% 1H312 A1

R509 RES MF W4 3K3 1% 1H233 7R

R509 RES MF W4 6K8 1% 1H268 A1


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R510 RES MF W4 3K3 1% 1H233 7R

R510 RES MF W4 6K8 1% 1H268 A1

R511 RES MF W4 1% 4K7 1H247 7R

R511 RES MF W4 10K 1% 1H310 A1

R512 RES MF W4 1% 10K 1H310 7R

R512 RES MF W4 18K 1% 1H318 A1

R515 RES MF W4 3K3 1% 1H233 7R

R516 RES MF W4 1% 1K8 1H218 7R

R601 RES MF W4 1% 47K 1H347 7R

R602 RES MF W4 1% 470R 1H147 7R

R603 RES MF W4 1% 680K 1H468 7R

R604 RES MF W4 1% 56K 1H356 7R

R605 RES MF W4 1% 820R 1H182 7R

R701 RES MF W4 1% 47K 1H347 7R

R702 RES MF W4 1% 470R 1H147 7R

R703 RES MF W4 1% 680K 1H468 7R

R704 RES MF W4 1% 56K 1H356 7R

R705 RES MF W4 1% 820R 1H182 7R

R801 RES MF W4 1% 4K7 1H247 7R

R801 RES MF W4 560R 1% 1H156 8P

R802 RES MF W4 1% 100K 1H410 7R

R802 RES MF W4 3K9 1% 1H239 8P

R803 RES MF W4 1% 2K4 1H224 7R

R804 RES MF W4 1% 5K6 1H256 7R

R805 RES MF W4 1% 4K7 1H247 7R

R805 RES MF W4 560R 1% 1H156 8P

R806 RES MF W4 1% 100K 1H410 7R

R806 RES MF W4 3K9 1% 1H239 8P

R807 RES MF W4 1% 2K4 1H224 7R

R808 RES MF W4 1% 5K6 1H256 7R

R809 RES MF W4 1% 100K 1H410 7R

R810 RES MF W4 1% 100K 1H410 7R

R811 RES MF W4 1% 220R 1H122 7R

R812 RES MF W4 1% 220R 1H122 7R

R813 RES MF W4 1% 22K 1H322 7R

R814 RES MF W4 1% 22K 1H322 7R

R815 RES MF W4 1% 1K2 1H212 7R

R816 RES MF W4 1% 1K2 1H212 7R

R817 RES MF W4 18K 1% 1H318 7R

R818 RES MF W4 1% 8K2 1H282 8P

R819 RES MF W4 1% 8K2 1H282 8P

R901 RES MF FU W3 1R0 5%NFR25

1G810 7R

R902 RES MF W4 1% 100R 1H110 7R

R903 RES MF W4 1% 100R 1H110 7R

R904 RES MF W4 1% 1K8 1H218 7R

R905 RES MF W4 1% 4K7 1H247 7R

RLY1 RELAY G5Z-2A-E 24V A207 7R

RLY2 RELAY 960 OHM 51SB12T A205 8R

RV1 10K PSET 6F310 7R

RV101 10K PSET 6F310 7R

RV301 POT 20KA* 2 LOG A 6A320L A1

RV302 POT 10KB* 2 LIN 6A310E 7R



RV901 POT 20KA DUAL 18MMMOTORISED

6A360M 7R

RX1 REMOTE CONTROLRECEIVER SBX1610-62

B2103 7R

SK1 CAMCON BINDING POST4WAY NICKEL

8D418 7R

SK1 CANCON BINDING POST4WAY GOLD

8D418G 8R/8P

SK2 CAMCON BINDING POST4WAY NICKEL

8D418 7R

SK2 CANCON BINDING POST4WAY GOLD

8D418G 8R/8P

SK3 STEREO JACK PCB 8D301 7R

SK4 CAGE CLAMP 16A 3 WAYARC001-236

8Q001 7R


8Q003 7R

SK6 CAGE CLAMP 16A 2WAY236-402/000-009

8Q005 7R


8Q004 7R

SK201 IEC MAINS CONN PCB INSPX

8A001 7R

SK301 PHONO SKT 4-WAY EMC 8D224 7R

SK301 PHONO SKT 4-WAY EMCGOLD

8D225 8R/8P



8D225 8R/8P



8D225 8R/8P



8D225 8R/8P

SW1 SWITCH SLIDE 2WAY C/OPANEL MNT PCB

A1403 8R


10

SW201 SW PUSH MAINSSDDSA32MZU

A1007 7R

SW302 SW PUSH 4PCO A1013 8R

SW305 SWITCH SRBU 150 44A A1202 7R

SW305 SWITCH 4POLE SRBU5WAY

A1212 8R

TX1 ALPHA 7 AMP MULTIVOLTAGE TRANSFORM

L835TX 7R

TX1 ALPHA 1/5.2TRANSFORMER 230V

L841TX A1

TX1 ALPHA 8 AMP MULTIVOLTAGE TRANSFORM

L833TX 8R/8P

VOLMOT JUMPER 2 W LEAD APL5 1Y271 7R

X901 CER RESON CST4.19MG4.19MHz

7W002 7R

Y1 TX WIRE RESTRAINT F185 7R

Y2 TX WIRE RESTRAINT F185 7R

Z201 IC VREG POS 7815 5D7815 7R

Z202 IC VREG NEG 7915 5D7915 7R

Z300 IC AUDIO DUAL 4560D 5B4560 7R

Z301 IC AUDIO DUAL NE5532N 5A5532 A1


Z303 IC COMPARITOR TA7317P 5M7317 7R


Z305 IC AUDIO DUAL NE5532N 5A5532 7R

Z305 IC AUDIO DUAL OP275 5B275 8R

Z801 IC HCMOS PC74HC4052PONLY

5F4052P 7R

Z901 IC SOCKET 18 PIN 0.3'' 8S018 7R

Z901 IC CMOS MICROPIC16C54XT/P

5H16C54X 7R

Z902 MOTOR DRIVER 5Q6109 5Q6109 7R

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

ISSUE

DRAWING NO.

23425

DRAWING TITLE

Drawn by:DATE

FilenameECO No. DESCRIPTION OF CHANGE

J:\FILES\Products\A1_7_8_8P AMPS\Issue_2\L846C2_3.SCH

A & R Cambridge Ltd.Pembroke AvenueDenny Industrial CentreWaterbeachCambridge CB5 9PB

ALPHA 1,7, 8 & 8P AMP

Circuit Diagram

L846C2_2LJW22-Sep-1998

INITIALSDate Printed 2 7Sheet of

Notes:

LN E

N E L

SK201IEC3

C201

4N7 MAINS

FS201AS1A25

+ C204

10M EL 50V

+ C205

10M EL 50V

C206100N PC

C207100N PC

PSUP

POWRE

NSUP

R204 470R FU

R205 470R FU

R206 470R FU

R201

470R FU

R202

470R FU

R203

470R FU

C208

4N7 PP

C2094N7 PP

+ C21010U EL

+ C21110U EL

P15V

N15V

VinI

GN

DG

Vout O

Z2017815

VinI GN

DG

Vout O

Z2027915

P15V

N15V

+37V

-37V

SW201B

A1007

SW201A

A1007

SELECT VOLTAGEBY FITTING FS201OR FS202

MAINS INPUT

MAINS SWITCH

FIT ONLY ONE FUSE

W12

Chassis Earth Point,

W10

Use correct screw and washer.

R207100R MF

MAINS_N

MAINS_E

MAINS_L

MAINS SW SPACER

MS

MAINS_SW_SPACER

LK1001

LINK10NP

LK1002

LINK10NP

LK1003

LINK10NP

LK1004

LINK10NP

LK1005

LINK10NP

LK1006

LINK10NP

LK1007

LINK10NP

LK1008

LINK10NP

LK1009

LINK10NP

LK1010

LINK10NP

LK1011

LINK10NP

LK1012

LINK10NP

LK1013

LINK10NP

LK1014

LINK10NP

LK1015

LINK10NP

LK1016

LINK10NP

LK1017

LINK10NP

LK1018

LINK10NP

LK1019

LINK10NP

LK1020

LINK10NP

LK1021

LINK10NP

LK1023

LINK10NP

LK1024

LINK10NP

LK1025

LINK10NP

LK1026

LINK10NP

LK1027

LINK10NP

LK1028

LINK10NP

LK1029

LINK10NP

LK1030

LINK10NP

LK1031

LINK10NP

LK1032

LINK10NP

LK1033

LINK10NP

LK1034

LINK10NP

LK1035

LINK10NP

LK1036

LINK10NP

LK1037

LINK10NP

LK1038

LINK10NP

LK1039

LINK10NP

LK1063

LINK10NP

LK1064

LINK10NP

LK1065

LINK10NP

LK1066

LINK10NP

LK1067

LINK10NP

LK1068

LINK10NP

LK1069

LINK10NP

LK1070

LINK10NP

LK1071

LINK10NP

LK1072

LINK10NP

LK1073

LINK10NP

LK1074

LINK10NP

LK1075

LINK10NP

LK1077

LINK10NP

LK1078

LINK10NP

LK1079

LINK10NP

LK1080

LINK10NP

LK1082

LINK10NP

LK1083

LINK10NP

LK1084

LINK10NP

LK1085

LINK10NP

LK1086

LINK10NP

LK1087

LINK10NP

LK1088

LINK10NP

LK1089

LINK10NP

LK1090

LINK10NP

LK1091

LINK10NP

LK1092

LINK10NP

LK1093

LINK10NP

LK1094

LINK10NP

LK1095

LINK10NP

LK1096

LINK10NP

LK1097

LINK10NP

LK1098

LINK10NP

LK1041

LINK10NP

LK1042

LINK10NP

LK1043

LINK10NP

LK1044

LINK10NP

LK1045

LINK10NP

LK1046

LINK10NP

LK1047

LINK10NP

LK1048

LINK10NP

LK1049

LINK10NP

LK1050

LINK10NP

LK1051

LINK10NP

LK1052

LINK10NP

LK1053

LINK10NP

LK1054

LINK10NP

LK1055

LINK10NP

LK1056

LINK10NP

LK1057

LINK10NP

LK1058

LINK10NP

LK1059

LINK10NP

LK1060

LINK10NP

WARNING SAFETY CRITICAL COMPONENTREPLACE WITH IDENTICAL PART

T1

T2

T3

LK1099

LINK10NP

LK1100

LINK10NP

LK1101

LINK10NP

LK1102

LINK10NP

LK1103

LINK10NP

LK1104

LINK10NP

LK1105

LINK10NP

LK1106

LINK10NP

LK1107

LINK10NP

LK1108

LINK10NP

LK1109

LINK10NP

LK1110

LINK10NP

LK1111

LINK10NP

LK1112

LINK10NP

LK1113

LINK10NP

LK1114

LINK10NP

LK1115

LINK10NP

LK1116

LINK10NP

LK1117

LINK10NP

LK1118

LINK10NP

LK1119

LINK10NP

LK1120

LINK10NP

LK1121

LINK10NP

LK1122

LINK10NP

LK1125

LINK10NP

LK1127

LINK10NP

LK1128

LINK10NP

LK1129

LINK10NP

LK1130

LINK10NPLK1131

LINK10NP

LK1132

LINK10NP

LK1133

LINK10NP

LK1134

LINK10NP

LK1135

LINK10NP

LK1136

LINK10NPLK1137

LINK10NP

LK1138

LINK10NP

PD1

TOOLING

PD2TOOLING

PD3TOOLING

PD4TOOLING

PD5TOOLING

Y1TX WIRE CLIP

PD8TARGET1

PD9TARGET1 Y2

TX WIRE CLIPPD10TOOLING

PD11TOOLING

LK1062

LINK10NP

Test point for service engineers are shown as

See additional service documentation for details.

FS202AS2A5_115V

230V

115V

9Vac

SCREEN

TX1

L833TX

TP

1

TP

2

TP3

TP

4

TP

5

TP6

TP28

C200

1N0 CD

D201

UF5403

D202

UF5403

D203

UF5403

D204

UF5403

Blue1 Dark Grey2 Orange3

SK4

CAGECLAMP3

Green1SK5

CAGECLAMP1

Grey 1

Grey 2

SK6

CAGECLAMP2

Orange 1

Blue 2

Orange 3

SK7

CAGECLAMP3A

WAF

WAF

WAF

GREY1

GREY2

GREEN

OR1

OR2

BLUE1

BLUE2

LK1081

LINK10NP

LK1076

LINK10NP

LJW

LJW 12-05-9898_1025

Photo Strip

PS

PHOTO_STRIP

1

Issue BoxDrilling Detail

DD3

DD_ISSUE

Update Box_2

EL2

UPDATE_BOX_2

BARCODE LABEL

BARCD

BARCODE

Spare Fuse ClipEL1

FUSE CLIP

LK12

LINK10NP

LK13

LINK10NP

LK14

LINK10NP

PD7TOOLING

PD12TOOLING

PD13TOOLING

PD14TOOLING

POWER SUPPLY

Paper MarkerA1 Horizontal

DD1

DD_A1H

Paper MarkerA1 Vertical

DD2

DD_A1V

DetailDrilling

DD

DRILL_DWG

C15

4N7 MAINS

C234N7 MAINS

PCB

PCB

L846PB

CEM1, 2 OZ CuPCB MATERIAL

DD4

CEM1_20Z

ACSENSE

Initial release

2LISTENING APPROVAL29-05-9898_1029

ACLT1

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

ISSUE

DRAWING NO.

23425

DRAWING TITLE

Drawn by:DATE




ALPHA 1, 7, 8 & 8P AMP

Circuit Diagram

L846C3_2LJW22-Sep-1998


Notes:

1 2 3

SW301A2PCO

4 5 6

SW301B2PCO

12 LK701

10MM LINK

12

LK70210MM LINK

3

21

Z305ANE5532

C701100P PP

R70147K MF

R702

470R MF

C702

47P CD

+ C70322U EL

R703

680K MF

R704

56K MF

C704

4N7 PP

C705

1N3 PP

R705820R MF

+ C70610U EL

12 LK601

10MM LINK 12

LK60210MM LINK

C601100P PP

R601

47K MF

R602470R MF

C602

47P CD

+ C60322U EL

R603

680K MF

R604

56K MF

C604

4N7 PP

C605

1N3 PP

R605820R MF

+

C606

10U EL

1

2

3

SW302A4PCO

4

5

6

SW302B4PCO

7 8 9

SW302C4PCO

10 11 12

SW302D4PCO

5

67

Z305BNE5532

C30110N CD

C30210N CD

N15V

P15V

PHINE

VCRL TUNL COL AVL

VCRR TUNR COR AVR TAPR

TAPL

SIGE

R4011K8 MF

R5011K8 MF

R402

47K MF

R502

47K MF

RV301A20K LOG POT

RV301B20K LOG POTVCR TUNER CD AV/DVD TAPE IN TAPE OUT

PREAMP OUT8P - PWR IN

8P - LINK

1 2

LK80410MM LINK

1 2LK803

10MM LINK

8P ONLY

8P ONLY

Key to component numbers:

0xx Power amp L1xx Power amp R2xx Power supply3xx ICs / Switches4xx Tone / balance L5xx Tone / balance R6xx MM phono L7xx MM phono R8xx Pre amp output L&R9xx Remote control

EM

C

1

N

F

SK301A

PHONO4G

N

F

SK301BPHONO4G

EM

C

1

N

F SK302APHONO4G

N

F

SK302BPHONO4G

EM

C

1

N

FSK303A

PHONO4GN

F

SK303BPHONO4G

EM

C

1

N

FSK304APHONO4G

N

F

SK304BPHONO4G

C303

1N0 CD C3041N0 CD

TAPEOL

TAPEOR

PREOR

PREOL

PHINR

PHINL

12345678

LK901A

L809CA84

Z305CNE5532

TP

7T

P8

R505

4K7 MF

R405

4K7 MF

C30547P CD

C30647P CD

LK8MINI_LK

FITTED BY HANDON ALPHA 1 AMP ONLY

LK9

MINI_LKON ALPHA 1 AMP ONLY

FITTED BY HAND

1

LJW

LJW98_1025 12-05-98

1

2

3

4

5

6

SW305AROTARY4H

12

11

10

9

8

7SW305B

ROTARY4H

13

14

15

16

17

18

SW305CROTARY4H

RLY2ARLY 51SB12T

RLY2BRLY 51SB12T

RLY2CRLY 51SB12T

R44

68K MF

R5522K MF

R572K7 1W CF

+ C29

1U0 EL

D61N4003F

+37V

1 23 45 67 89 10

11 1213 1415 16

PL1

DIL16 VPLG

12

LK10

10M

M L

INK

12

LK11

10M

M L

INK

R54

68K MF

R5622K MF

24

23

22

21

20

19

SW305DROTARY4H

R4322K MF

D105V6 400MW

12

LK1510MM LINK

12

LK1610MM LINK

PHONO & INPUTS

1236 5 4

SW1SLIDE2H

LK19B TO LK19A ON MAIN BOARDLK19A TO SNAP OFF BOARD FOR SLIDER SWITCH

1 2

LK19BL835CA

1 2

LK19AL835CA

SLIDER SWITCH FOR AV

R592K2 MF

R602K2 MF

CU

T W

HE

N C

IM F

ITT

ED

CU

T W

HE

N C

IM F

ITT

ED

VOLL

VOLR

Initial release

2

PREOUTR

PREOUTL

98_1029 29-05-98 LISTENING APPROVAL

MCLR

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

ISSUE

DRAWING NO.

23425

DRAWING TITLE

Drawn by:DATE





Circuit Diagram

L846C4_2LJW22-Sep-1998


Notes:

1

2

3

SW304A

2PCO

4

5

6

SW304B

2PCO

R801

4K7 MF

R805

4K7 MF

C801100P PP

C802100P PP

R802100K MF

R806100K MF

R8032K4 MF

R8072K4 MF

R808

5K6 MF

R804

5K6 MF

R811

220R MF

R812

220R MF

1Y012

1Y114

1Y215

1Y311

2Y01

2Y15

2Y22

2Y34

INH6

S19

S010

2Z 3

VEE 7

1Z 13Z801A

P74HC4052

VD

D16

GN

D8

Z801BP74HC4052

+

C803

10U EL

+

C804

10U EL

R809100K MF

R81322K MF

R81422K MF

R810100K MF

D8015V6 400MW

D8024V7 400MW

R8151K2 MF

R8161K2 MF

P15V

N15V

C80510N CD

C80610N CD

R817

18K MF D8031N4148

8P ONLY8P ONLY

R506

220R MF

R5074K7 MF

R5084K7 MF

R509

3K3 MF

R510

3K3 MF

R51210K MF

RV302A10K LIN POT

RV303A10K LIN POT

C502220N PE

C503220N PE

R5114K7 MF

R504

6K8 MF

+

C501

10U EL

R5032K2 MF

RV304A10K LIN POT

+

C505

10U EL

R5153K3 MF

BASS

TREBLE

BALANCE

8dB cut and boostTone controls :

R406

220R MF

R4074K7 MF

R4084K7 MF

R409

3K3 MF

R410

3K3 MF

R41210K MF

RV302B10K LIN POT

RV303B10K LIN POT

C402220N PE

C403220N PE

R4114K7 MF

R404

6K8 MF

+

C401

10U EL

R4032K2 MF

RV304B10K LIN POT

+

C405

10U EL

R4153K3 MF

BASS

TREBLE

BALANCE

8dB cut and boostTone controls :

Pot arrow shows max boost Pot arrow shows max boost

C21210N CD

C21310N CD

C21410N CD

C21510N CD

P15V

N15V

PREMUTEPREP

PRENPREG

R516

1K8 MF

R416

1K8 MF

3

21

Z304A

4560D

5

67

Z304B

4560D

3

21

Z302A

4560D

5

67

Z302B

4560D

C5044N7 PP

TP

17

TP

18

TP19

TP20

TP

21

(560R MF in 8P)

(3k9 MF in 8P)

(560R MF in 8P)

(3k9 MF in 8P)

R8198K2 MF

R8188K2 MF

*** NOTE! ***PCB has two links,LK801, LK802 in place ofR818 and R819.THE RESISTORS SHOULD BE FITTED ON THE 8P - NOT THE LINKS.

C407100P CD

C507

100P CD

C21610N CD

C217

10N CD

C406100P CD

C508

10P CD

C408

10P CD

C506100P CD

LINK 1 7 8 8P

234567

601

701

803804

602

702

FIT LINKS AS BELOW

3

21

Z300A4560D

5

67

Z300B4560D

84

Z300C4560D

84

Z302C4560D

84

Z304C4560D

1

LJW

LJW

12-05-9898_1025 1TONE CONTROL

C4044N7 PP

R6118K MF

R6218K MF

1 2

LK19

10MM LINK

1 2

LK20

10MM LINK

R63

56K MF

R6456K MF

VOLR

VOLR

VOLL

VOLL

TONORTONOL

PWRIR

PWRIL

PREOUTR

PREOUTL

Initial release

2

PREMUTE

LISTENING APPROVAL29-05-9898_1029

TONOL

TONOR

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

ISSUE

DRAWING NO.

23425

DRAWING TITLE

Drawn by:DATE





Circuit Diagram

L846C5_2LJW22-Sep-1998


Notes:

R311K0 CF

R40

33K MF

R242K7 MF

R195K6 CF

R232K7 MF

Q16

BC557B

Q7

BC556B Q6BC556B

Q3

BC556B

+

C9

100U EL

R32

33K MF

3

21

Z301A

NE5532

84

Z301CNE5532

R33

680K MF

C647N PE

R38

680K MF

R3747K MF

SRVOL

Q13

BC547B

Q12

BC547B

Q4

BC546B

Q8BC546B

Q9

BC546B

Q10BC547B

Q11BC547B

Q5

BC556B

R3033K MF

C8

100P PP

R25330R MF

C7

4N7 PP

C533P PS

R20

15K MF

R22120R MF

R2818K MF

R291K2 MF

C4

47N PE

R175K6 MF

R162K7 MF

R8470R FU

R12470R FU

R9470R FU

C1415N PE

+ C11100U EL 100V

R26

470R FU

R5100R FU

D3

10V 400MW

D4

10V 400MW

R6100R FU

R10

470R FU

R11

470R FU

R141K0 MF

AMPEL

R151K0 CF

R27470R FU

-37V

R7

470R FU

R10R22 3W MO

R1A0R22 3W MO

Q1IRF540

D11N4003F

+37V

R4100R FU

+

C1

100U EL 100V

C247N PE

D2

10V 400MW

R3

2R2 CF

C17470P CD

R24R7 W2 CF

C3

100N PC

Q2IRF540

C1315N PE

+ C12100U EL 100V

P15V

N15V

R182K7 MF

Q15BC546B

R523K9 MF

RLY1A

RLY G5Z-2A-E

LHC 2

RHC 31

4

L 5

6

R 7

SK3HPSKT

1 2 3

SW99A2PCO

4 5 6

SW99B2PCO

R49

330R 1W CF

R149

330R 1W CF

R150100R W2 CF

R50100R W2 CF

C20

470P CD

C18

1N0 CD

R41470R FU

R42620R MF

+ C16

100U EL

R45

18K MF

R35

33K MF

R474K7 MF

R4847K MF + C19

100U EL

Q14BC557B

R21100R MF

C2110N CD

C2210N CD

Pla

ce Q

15 b

y hs

k.

Q17BC546B

Q18BC546B

Q19

BC556B

Top+

Top-

SK1A

CAMCON_G

Bot+

Bot-

SK1B

CAMCON_G

CHASS

SK1C

CAMCON_G

L12U2H LAC SMALL

PWRIL

IQ1L

IQ2L

SPLD

SPLE

HPL

HPR

HPE

SPLS

1234567

LK311

L825CA

HS1

E81801

HS2

E81801

HS3

E81801

HS4

E81801

R53

18K MF

1234567

LK311A

L825CA

CL1

E82201

CL2

E82201

R131K0 MF

R46150R MF

TP

9

TP10

TP12

TP11

TP

13

TP14

TP15

TP

16

PD6

PD6TOOLING

1 2

LK710MM LINK

+

C10

22U EL OS

12

LK110MM LINK

98_1025

LJW

1LJW 12-05-98 Initial release

D5

1N4148

+ C27220U ELC25

100N PC

R3918K MFC24

4N7 PP

C28

100N PC

C26100N PC

D8

1N4003F

R341K MF

12

LK1810MM LINK

RV110K PSET

LEFT CHANNEL

R70680R MF

R5115K MF

+ C30

10U CERAFINE

R36

100R FU

PWRIL

PROT_OP_L

OP_L

SP2_SEND_L

SP2_RETN_L

VI_CH2

VI_PROTECT

2

PREMUTESK3_7

SW99_3SW99_2

SP2_SEND_L

SP2_SEND_RSP2_RETN_R

SP2_RETN_L

OP_LOP_R

98_1029 29-05-98 LISTENING APPROVAL

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

ISSUE

DRAWING NO.

23425

DRAWING TITLE

Drawn by:DATE





Circuit Diagram

L846C6_2LJW22-Sep-1998


Notes:

R1311K0 CF

R140

33K MF

R1242K7 MF

R1195K6 CF

R1232K7 MF

Q116

BC557B

Q107

BC556B Q106BC556B

Q103

BC556B

+

C109

100U EL

R132

33K MF

5

67

Z301B

NE5532

R133680K MF

C10647N PE

R138680K MF

R13747K MF

SRVOR

Q113

BC547B

Q112

BC547B

Q104

BC546B

Q108BC546B

Q119

BC546B

Q110BC547B

Q111BC547B

Q105

BC556B

R13033K MF

C108

100P PP

R125330R MF

C107

4N7 PP

C10533P PS

R120

15K MF

R122120R MF

R12818K MF

R1291K2 MF

C10447N PE

R1175K6 MF

R1162K7 MF

R108470R FU

R112

470R FU

R109470R FU

C11415N PE

+ C111100U EL 100V

R126

470R FU

R105100R FU

D10310V 400MW

D10410V 400MW

R106100R FU

R110

470R FU

R111

470R FU

R1141K0 MF

R1131K0 MFAMPER

R1151K0 CF

R127470R FU

-37V

R107470R FU

R1010R22 3W MO

R101A0R22 3W MO

Q101IRF540

D1011N4003F

+37V

R104100R FU

+C101

100U EL 100V

C10247N PE

D10210V 400MW

R103

2R2 CFC117470P CD

R1024R7 W2 CF

C103

100N PC

Q102IRF540

C11315N PE + C112

100U EL 100V

R1182K7 MF

Q115BC546B

R1523K9 MF

RLY1B

RLY G5Z-2A-E

RLY1CRLY G5Z-2A-E

C120

470P CD

C118

1N0 CD

R141470R FU

R142620R MF

+C116100U EL

R145

18K MF

R135

33K MF

R1474K7 MF

Q114BC557B

R121100R MF

PW

R1

IN12

IN23

0V4V-

5

O 6

FB

7

RC

8

V+

9

Z303TA7317P

+ C123100U EL

R16547K MF

R154

47K MF

R153

47K MF

R15547K MF + C119

1U0 EL

R157

100K MF

D1051N4003F

R15847K MF

Q1202SC2547

R1611K0 1W CF

D1061N4003F

R16010K MF

R159100K MF

+C122100U EL

+37V

R16418K MF

-37V

+

C121

1U0 EL

R163

33K MF

R162

47K MF

1 2LK4

10MM LINK

D107

1N4003F

R1672K7 1W CF

+37V

R166

2K7 1W CF

R

G

LED201

LED RED/GRND1085V6 400MW

Q117BC546B

Top+

Top-

SK2A

CAMCON_G

Bot+

Bot-

SK2B

CAMCON_G

CHASS

SK2C

CAMCON_G

L1012U2H LAC SMALL

PWRIR

IQ1R

IQ2R

SPRD

SPRE

SPRS

ACDET

PROTE

PROT

PROTIN

Q118BC546B

123

LK805A

L815CA

123

LK805

L815CA

R146150R MF

TP22

TP23

TP24

TP

25

TP26

TP27

PD6

CHASSISEARTH

12

LK3

10M

M L

INK

12

LK210MM LINK

FIT ALLBUT HK

12

LK5

10M

M L

INK

12

LK6

10M

M L

INK

LK5

& L

K6

FIT

FO

R H

K O

NLY

R156470R FU

+

C110

22U EL OS

98_1025 1Initial release12-05-98LJW

D71N4148

D91N4003F

C126100N PC

C128

100N PC

R134

1K MF

+ C127220U ELC125

100N PC

R13918K MF

C124

4N7 PP

12

LK11810MM LINK

RV10110K PSET

RIGHT CHANNEL

R170680R MF

+ C130

10U CERAFINE

R15115K MF

R136

100R FU

PWRIR

VI_CH2

SP2_RETN_R

ACSENSE

2LJW

VI_PROTECT

PROT_OP_L

OP_R

SP2_SEND_R

SP2_RETN_L PREMUTE

LISTENING APPROVAL29-05-9898_1029

SK3_7MUTE

SW99_2

SW99_3

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

ISSUE

DRAWING NO.

23425

DRAWING TITLE

Drawn by:DATE





Circuit Diagram

L846C7_2LJW22-Sep-1998


Notes:

RA21

RA32

RTCC3

MCLR4

VS

S5

RB0 6

RB1 7

RB2 8

RB3 9

RB4 10

RB5 11

RB6 12

RB7 13

VD

D14

OS

C2

15

OS

C1

16

RA017

RA118

Z901PIC16C54XT

3

2

1

+5V

O/P

GND Case

RX1

SBX1610-52

D9045V6 400MW

C904

10N CD

R9041K8 MF

C90310N CD

R903100R MF

R902100R MF

+C902

220U EL

C90110N CD

R901

1R0 FU

D9025V6 400MW

D9011N4003F

D903

1N4003F + C9071M0 25V C906

10N CD

C90510N CD

MOTE

REMO

MOTSUP

VOLM1

VOLM2

P5V

+5V

+5v

X901

CST4.19MG

VOLUME DRIVE

MOTOR DRIVER

D9051N4148

R905

4K7 MF

W11

W13

+5V

GND 1

MD1 2CC13

REF4

MC15

MC26

VC

C1

7

VC

C2

8

CC29 MD2 10

Z902BA6109

C100010N CD

12 VOLMOT

1Y271

12 VOLMOTA

1Y271

12345678

LK901L809CA

WARNING SAFETY CRITICAL COMPONENTREPLACE WITH IDENTICAL PART

123

LK902A

L815CA

123

LK902

L815CA

TP

29

TP30

TP31

TP32

-

112-05-98

-

LJW

R581K8 MF

+5V

12 LK17

10MM LINK

REMOTE CONTROL

VOLUME POT SNAP OFF BOARD

REMOTE SENSOR SNAP OFF BOARD

RV901A6A360M

RV901B6A360M

+-

+

RV901C6A360M

9

7

Case

RV901D

6A360MACLT1

MUTE

98_1026 Initial release

LJW 298_1029 29-05-98 LISTENING APPROVAL

MCLR

Arcam-7R-8R-8P-int-sm[1]

Documents

Transcript of Arcam-7R-8R-8P-int-sm[1]