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

7

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

R26

RES MF FU W3 470R 5%
NFR25

1G147

7R

R27

RES MF FU W3 470R 5%
NFR25

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

R36

RES MF FU W3 100R 5%
NFR25

1G110

7R

R39

RES MF W4 18K 1%

1H318

7R

R40

RES MF W4 1% 33K

1H333

A1

R41

RES MF FU W3 470R 5%
NFR25

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% 0R22
KOASPR3

1Q922

7R

R101

RES MO 3W 5% 0R22
KOASPR3

1Q922

7R

R102

RES CF W2 4R7 5%

1D847

7R

R103

RES CF W4 5% 2R2

1B822

7R

R104

RES MF FU W3 100R 5%
NFR25

1G110

7R

R105

RES MF FU W3 100R 5%
NFR25

1G110

7R

R106

RES MF FU W3 100R 5%
NFR25

1G110

7R

R107

RES MF FU W3 470R 5%
NFR25

1G147

7R

R108

RES MF FU W3 470R 5%
NFR25

1G147

7R

R109

RES MF FU W3 470R 5%
NFR25

1G147

7R

R110

RES MF FU W3 470R 5%
NFR25

1G147

7R

R111

RES MF FU W3 470R 5%
NFR25

1G147

7R

R112

RES MF FU W3 470R 5%
NFR25

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

R126

RES MF FU W3 470R 5%
NFR25

1G147

7R

R127

RES MF FU W3 470R 5%
NFR25

1G147

7R

R128

RES MF W4 18K 1%

1H318

7R

R129

RES MF W4 1% 1K2

1H212

7R

Summary of Contents for ALPHA 7R

Page 1: ...ages is 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 1...

Page 2: ...d near to the mains inlet socket 4 Remove 5 screws from the rear panel one at each end and 3 along the bottom edge 5 Remove the transformer bolt 6 Release the PCB pillar located near to the serial num...

Page 3: ...B 7R C2 PEST 47N 63V 10 2K347 7R C3 PCRB 100N 100V 5 RA 5mm 2H410 7R C4 PEST 47N 63V 10 2K347 7R C5 PSTY 33P 160V ENCAP 1PF 2F033 7R C7 PPRO 4N7 63V 5 RA 2D247N 7R C8 PPRO 100P 63V 5 RA 2D110N 7R C9 E...

Page 4: ...D 1N0 63V 20 RA 2A210 7R C201 SUPPR CAP 4N7 250V 2K247 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 10...

Page 5: ...D6 RECT FIER 1N4003F 1A 200V 3B4003 8R D7 SSDIODE 1N4148 75V 3A4148 7R D8 RECT FIER 1N4003F 1A 200V 3B4003 7R D9 RECT F ER 1N4003F 1A 200V 3B4003 7R D10 ZENER 5V6 400MW 3C05604 8R D101 RECT F ER 1N40...

Page 6: ...7R Q18 TRANS LF SS N BC546B 4A546 7R Q19 TRANS LF SS P BC556B 4A556 7R Q101 TRANS PWR MOSFET RF540 SMF045 4K045 7R Q102 TRANS PWR MOSFET RF540 SMF045 4K045 7R Q103 TRANS LF SS P BC556B 4A556 7R Q104 T...

Page 7: ...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...

Page 8: ...5 1E227 7R R170 RES MF W4 1 680R 1H168 7R R201 RES MF FU W3 470R 5 NFR25 1G147 7R R202 RES MF FU W3 470R 5 NFR25 1G147 7R R203 RES MF FU W3 470R 5 NFR25 1G147 7R R204 RES MF FU W3 470R 5 NFR25 1G147 7...

Page 9: ...4 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 1...

Page 10: ...Y271 7R X901 CER RESON CST4 19MG 4 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 5B4...

Page 11: ...NK10NP LK1094 LINK10NP LK1095 LINK10NP LK1096 LINK10NP LK1097 LINK10NP LK1098 LINK10NP LK1041 LINK10NP LK1042 LINK10NP LK1043 LINK10NP LK1044 LINK10NP LK1045 LINK10NP LK1046 LINK10NP LK1047 LINK10NP L...

Page 12: ...component numbers 0xx Power amp L 1xx Power amp R 2xx Power supply 3xx ICs Switches 4xx Tone balance L 5xx Tone balance R 6xx MM phono L 7xx MM phono R 8xx Pre amp output L R 9xx Remote control EMC 1...

Page 13: ...3 MF BASS TREBLE BALANCE 8dB cut and boost Tone controls R406 220R MF R407 4K7 MF R408 4K7 MF R409 3K3 MF R410 3K3 MF R412 10K MF RV302B 10K LIN POT RV303B 10K LIN POT C402 220N PE C403 220N PE R411 4...

Page 14: ...0MW R3 2R2 CF C17 470P CD R2 4R7 W2 CF C3 100N PC Q2 IRF540 C13 15N PE C12 100U EL 100V P15V N15V R18 2K7 MF Q15 BC546B R52 3K9 MF RLY1A RLY G5Z 2A E LHC 2 RHC 3 1 4 L 5 6 R 7 SK3 HPSKT 1 2 3 SW99A 2P...

Page 15: ...40 C113 15N PE C112 100U EL 100V R118 2K7 MF Q115 BC546B R152 3K9 MF RLY1B RLY G5Z 2A E RLY1C RLY G5Z 2A E C120 470P CD C118 1N0 CD R141 470R FU R142 620R MF C116 100U EL R145 18K MF R135 33K MF R147...

Page 16: ...N CD R903 100R MF R902 100R MF C902 220U EL C901 10N CD R901 1R0 FU D902 5V6 400MW D901 1N4003F D903 1N4003F C907 1M0 25V C906 10N CD C905 10N CD MOTE REMO MOTSUP VOLM1 VOLM2 P5V 5V 5v X901 CST4 19MG...

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