Input & Tone Pcb Schematic (Tone Control) - Cambridge Audio 640A Service Manual

VR2:A
B20K LINEAR
3 1
R3
C1
4k7
330p poly
R CH IN
R11 R1
8k2 22k
VR3:A
B20K LINEAR
3 1
C6
150n poly
VR2:B
B20K LINEAR
6 4
R43 R42
C10
4k7 4k7
330p poly
L CH IN
R45 R20 R44
8k2 22k 8k2
VR3:B
B20K LINEAR
6 4
C11
150n poly
HEADPHONE
R61
J5
220R 3W C
TERMINAL
R63
J6
220R 3W C
TERMINAL
R64
470R 1W C
J7
TERMINAL
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Cambridge Audio Azur 640A Integrated Amplifier
C29
10u 16V NP
R2
4k7
C9
5p
R4
6
8k2 +15V
C17
5
47n poly
U2:A
3
R12
1
2
10k
R13
NE5532
C16
10k
47n poly
-15V
C31
10u 16V NP
C15
5p
+15V
C20
47n poly
3 U4:A
R46
1
2
10k
NE5532
R47
C19
10k
47n poly
-15V
CN2
8
RSW1
7
RSW2
R
3
2
L
4
R62 LSW2
470R 1W C
5
LSW1
GND
1
HEADPHONE JACK
AP12714/5 Input & Tone PCB Schematic (Tone Control)
SW1:B
SW-DPDT
R52
DEFEAT
150k
VR1:A
U2:B
20K MOTORISED DUAL POT
C28
2
7 VR4:B
10u 16V NP
R59
NE5532 5
150k
MN20K BALANCE
C18
22p
SW1:A
SW-DPDT
R54
DEFEAT
150k
U4:B
C30
6
VR1:B
7
5
10u 16V NP
NE5532
VR4:A
5
R60
150k
20K MOTORISED DUAL POT
2
MN20K BALANCE
C21
22p
SPEAKER SWITCHING
SW2:A
J3
J1
TERMINAL
SW-DPDT
TERMINAL
TAPE
SW2:B
J4
J2
TERMINAL
SW-DPDT
TERMINAL
TAPE
+15V
C32
+15V
100u 25V
C27
47n poly
C33
U5:A
100u 25V
3
1
2
-15V
NE5532
R CH OUT
C24
47n poly
-15V
CN3
1
2
3
4
5
6
H6 2.54mm
TO POWER AMP
U5:B
5
7
6
NE5532
L CH OUT
8