Cambridge Audio 640A - Right Channel Amplifier Circuit

Cambridge Azur 640A Integrated Amplifier
AP12707/6 Power Amp Schematic (Right Channel)
1
2
CN11
H2 2.54mm
SIGNAL IN
D10
IN4004
D8
IN4004
+45V
-45V
R50
4R7 3W
WW
R70
100R
R51
100R
Q31
MJE350
R71
150R
R98
150R
C43
220u 50V
C45
220u 50V
R72
150R
R81
100R 8th
R80
100R 8th
R65
33k
R64
150R
C51
470p
R79
1k 8th
C41
100u NP 16V
signal2
Q24
MJE340
D9
ZEN 3V3
R96
150R
C64
220u 50V
C33
220u 50V
R57
8k2 0.66W
R58
47R 8th
R59
47R 8th
R82
33k 8th
C38
100p poly
R83
4k7 8th
C39
10u NP 16V
R78
330k 8th
C28
100n
C50
33p
C47
10u NP 16V
R55
1k
R69
0.22R 3W
R52
0.22R 3W
LE1
LE2
R54
18k
LK22
LINK
LICLIP
LFCLIP
WIRE2
J10
TERMINAL
J12
TERMINAL
LK9
LINK
WIRE LINK
WIRE LINK
WIRE1
E
S
C
B
D
5
1
3
2
4
U4
SAP15P
E
S
C
B
D
5
4
3
1
2
U5
SAP15N
R74
1k
C44
5p
R75
10k 8th
R77
10k 8th
C42
47u 50V
R84
10R 8th
C40
47n poly
R56
100R
signal2
Q25
MJE340
+45V3
-45V3
LO
Q23
MPSA13
Q30
MPSA92/93
Q32
MPSA42/43
Q33
MPSA92/93
Q27
MPSA42/43
Q26
MPSA42/43
Q28
MPSA92/93
Q29
MPSA92/93
C76
2.2n PPE Bypass (640A only)
C78
22p
R67
150R
1
3
2
R68
47R
C12
15n poly
R101
47R 8th
-45V3
+45V3
C48
100n 160V Poly
To Loudspeaker PCB
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