Cambridge Audio 640A - Left Channel Amplifier Circuit

Cambridge Azur 640A Integrated Amplifier
AP12707/6 Power Amp Schematic (Left Channel)
1
2
CN2
H2 2.54mm
SIGNAL IN
D4
IN4004
D2
IN4004
+45V
-45V
R44
4R7 3W
WW
R99
100R
R21
100R
Q14
MJE350
R27
150R
R43
150R
C66
220u 50V
C65
220u 50V
R28
150R
R30
100R 8th
R31
100R 8th
R102
33k
R103
150R
C8
470p
R34
1k 8th
C17
100u NP 16V
Q11
MJE340
D1
ZEN 3V3
R41
150R
C11
220u 50V
C7
220u 50V
R16
8k2 0.66W
GND
R15
47R 8th
R14
47R 8th
R36
33k 8th
C2
100p poly
R35
4k7 8th
C18
10u NP 16V
R37
330k 8th
C24
100n
C13
10u NP 16V
C9
33p
WIRE3
R18
1k
LK6
LINK
R19
18k
R100
0.22R 3W
R22
0.22R 3W
WIRE4
RE1
RE2
RICLIP RFCLIP
J6
TERMINAL
J8
TERMINAL
LK8
LINK
WIRE LINK
WIRE LINK
E
S
C
B
D
5
4
3
1
2
U3
SAP15N
E
S
C
B
D
5
1
3
2
4
U2
SAP15P
R40
10R 8th
C19
47n poly
R29
1k
R42
10k 8th
R39
10k 8th
C22
47u 50V
R17
100R
signal1
signal1
Q12
MJE340
+45V2
-45V2
RO
Q13
MPSA13
Q15
MPSA92/93
Q18
MPSA42/43
Q16
MPSA92/93
Q7
MPSA92/93
Q8
MPSA92/93
Q10
MPSA42/43
Q9
MPSA42/43
C49
2.2n PPE Bypass (640A only)
C77
22p
R53
150R 8th
1
3
2
R116
47R
C14
15n poly
R119
47R 8th
-45V2
+45V2
C46
100n 160V Poly
To Loudspeaker PCB
To enhance viewing, please print to A3 19