Cambridge Azur 640R AV Receiver
Power Amplifiers Circuit Diagrams
Q8
2SC
4793A
-Y
Q6
D946BR
Q7
2SA
1837A
-Y
R24
0.22/5WX2
Q9
2SA1943
Q10
2SC5200
R22
270/
0.5W
R21
4.7/0.5W
R23
4.7/0.5W
C10
150P
C11
150P
+55V
-55V
R-IN
L1
0.5UH
R25
10/0.25W
Q2
9
2SC
4793A
-Y
Q2
8
2SA
1837A
-Y
R83
0.22/5WX2
Q31
2SA1943
Q33
2SC5200
R80
270/
0.5W
R78
4.7/0.5W
R82
4.7/0.5W
C34
150P
C36
150P
+55V
-55V
L-IN
L2
0.5UH
R85
10/0.25W
Q3
0
2SC
4793A
-Y
Q5
8
2SA
1837A
-Y
R84
0.22/5WX2
Q61
2SA1943
Q32
2SC5200
R81
270/
0.5W
R79
4.7/0.5W
R159
4.7/0.5W
Q26
D946BR
C35
150P
C70
150P
+55V
-55V
RS-IN
L4
0.5UH
R163
10/0.25W
Q6
0
2SC
4793A
-Y
Q5
9
2SA
1837A
-Y
R161
0.22/5WX2
Q62
2SA1943
Q63
2SC5200
R158
270/
0.5W
R157
4.7/0.5W
R160
4.7/0.5W
C69
150P
C71
150P
+55V
-55V
LS-IN
L5
0.5UH
R162
10/0.25W
Q8
0
2SC
4793A
-Y
Q7
9
2SA
1837A
-Y
R222
0.22/5WX2
Q81
2SA1943
Q82
2SC5200
R220
270/
0.5W
R219
4.7/0.5W
R221
4.7/0.5W
C92
150P
Q27
D946BR
C93
150P
+55V
-55V
C-IN
SYS-MUTE
K1A
JZC-42F
J
K2C
JZC-42F
J
K3C
JZC-42F
K3B
JZC-42F
K3A
JZC-42F
Q4
5
2SC
4793A
-Y
Q43
D946BR
Q4
4
2SA
1837A
-Y
R129
0.22/5WX2
Q49
2SA1943
Q48
2SC5200
R127
270/
0.5W
R125
4.7/0.5W
R128
4.7/0.5W
C54
150P
C56
150P
Q57
D946BR
L3
0.5UH
R130
10/0.25W
L7
0.5UH
R223
10/0.25W
LB channel
Q78
D946BR
K4B
JZC-42F
-55V
+55V
LB-IN
+55V
-55V
FL
FR
SL
SR
C POWER
LB
R229
2.4K/3W
+55V
S+12V
Q15
C2458
Q16
C2235
Q13
C2458
Q12
C2458
Q14
A970
R32
47K
R33
47K
R34
10K
R38
100K
R37
10K
R35
10K
C17
104
C16
473
+14V
RLAY CON
Speaker Protect
K1B
JZC-42F
J
K1C
JZC-42F
K2A
JZC-42F
RELAY-STOP
D45
1N4148
R39
100K
RELAY+15V
FL-OUT
FR-OUT
C-OUT
RS-OUT
LS-OUT
LB-OUT
PH-R
PH-L
over load
R40
2.2K
R198
8.2K
D8
IN4001
C15
470UF/10V
C171
470UF/10V
C179
220UF/16V
D31
1N4148
J
K4C
JZC-42F
Q7
1
2SC
4793A
-Y
Q69
D946BR
Q7
0
2SA
1837A
-Y
R195
0.22/5WX2
Q72
2SA1943
Q84
2SC5200
R194
270/
0.5W
R192
4.7/0.5W
R193
4.7/0.5W
C117
150P
C118
150P
L6
0.5UH
R196
10/0.25W
RB channel
K4A
JZC-42F
-55V
+55V
RB-IN
+55V
-55V
RB
RB-OUT
DW15
1N4742A
C95
100U/16
+B OUT
-E
+E
Feed back
B
C
E
-B OUT
1
2
3
4
5
6
7
8
9
10
11
CN34
11P2.0(180)
+12V
-VSS
+VCC
+55V
-55V
S+12V
1
2
3
4
5
6
7
8
CN29
8P2.0(180)
+B OUT
-E
+E
Feed back
B
C
E
-B OUT
1
2
3
4
5
6
7
8
CN28
8P2.0(180)
+B OUT
-E
+E
Feed back
B
C
E
-B OUT
1
2
3
4
5
6
7
8
CN32
8P2.0(180)
LB
LS
FL
AGND
MUTE
OVER VOLTAGE
OVER LOAD
+B OUT
-E
+E
Feed back
B
C
E
-B OUT
1
2
3
4
5
6
7
8
9
10
11
CN33
11P2.0(180)
+12V
-VSS
+VCC
+55V
-55V
S+12V
1
2
3
4
5
6
7
8
CN27
8P2.0(180)
+B OUT
-E
+E
Feed back
B
C
E
-B OUT
1
2
3
4
5
6
7
8
CN30
8P2.0(180)
+B OUT
-E
+E
Feed back
B
C
E
-B OUT
1
2
3
4
5
6
7
8
CN26
8P2.0(180)
+B OUT
-E
+E
Feed back
B
C
E
-B OUT
FL channel
FR channel
RS channel
C channel
LS channel
TO PAMP1 BOARD
FR
RS
C
AGND
MUTE
OVER VOLTAGE
OVER LOAD
RB
1
2
3
4
5
6
7
8
9
10
CN31
10P2.0(180)
SYS-MUTE
TO PAMP2 BOARD
Q4
C2235
R14
100K
D9
IN4001
D1
1N4148
STEREO MODE
D2
1N4148
D3
1N4148
D4
1N4148
D5
1N4148
R16
2.2K
C1
470UF/10V
Q2
C2878
R1
1.5K
Q3
C2878
R13
1.5K
R15
220K
STEREO MODE
R12
JUMP
D11
1N4148
D10
1N4148
DW1
6A3
DW3
6A3
D12
1N4148
D15
1N4148
DW2
6A3
DW7
6A3
D17
1N4148
D16
1N4148
DW6
6A3
DW8
6A3
D22
1N4148
D21
1N4148
DW12
6A3
DW13
6A3
D14
1N4148
D13
1N4148
DW4
6A3
DW5
6A3
D19
1N4148
D18
1N4148
DW9
6A3
DW11
6A3
D20
1N4148
D23
1N4148
DW10
6A3
DW14
6A3
1
2
3
4
CN17
4P(2.0)
PH-R
PH-L
HP/DET
PH-R
PH-L
GND
PH-DET
TO EarPHONE BOARD
R18
1.2K/1W
R17
1.2K/1W
C-OUT
RS-OUT
LS-OUT
LB-OUT
FR-OUT
FL-OUT
FR
FL
C
RS
LS
LB
POWER OUT
RB-OUT
RB
1
2
3
4
5
6
7
CN16
7P(2.5)
TO SPEAKER BRD
1
2
3
4
5
6
7
CN6
7P(2.5)
-12V
Q21
A1015
MCU+5V
R63
22K
R65
22K
R64
22K
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