Amp Pcb Schematic (Protection) - Cambridge Audio Azur 540A V2.0 Service Manual

D5
R112
LK43
1N4148
LO
LK7,5MM
100k 8th
D8
C55
10U 25V NP
1N4148
L AMP
R63
RO
100k 8th
C54
10U 25V NP
R AMP
Left Protection PCB Connector
CN2 CN8
1 1
H1A H1B
VI Output (R)
2 2
H2A H2B VI Bottom Input (R)
3 3
H3A H3B Amp Output (R)
4 4
H4A H4B VI Top Input (R)
5 5
H5A H5B -45V (R)
6 6
H6B
Amp Output (R)
7 7
H7A H7B Clip Output (R)
8 8
H8A H8B +45V (R)
2,5MM 8W 90 PIN HEADER 2,5MM 8W 90 PIN HEADER
SPEAKER TEST
CN10
1
2
3 R107
4
5
1k 8th
6
D28 R106
1N4004 10k 8th
H6 2.54mm
R105
10k 8th
R103
1k 8th
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Cambridge Audio Azur 540A V2.0 Amplifier
+45V P
R42
100k 8th
R77
LK24
PIC DC Detect
LK7,5MM
DGND
10k 8th
D7
D6
Q31
1N4148
MPSA42
1N4148
D9
Q30
MPSA92
1N4148
D10
1N4148
R109
100k 8th
DGND
-45V P
Right Protection PCB Connector
CN3 CN9
1 1 -45V. R
H9A H9B
VI Output (R)
2 2
H10A H10B VI Bottom Input (R)
3 3
H11A H11B Amp Output (R)
4 4
H12A H12B VI Top Input (R)
5 5
H13A H13B -45V (R)
6 6
H14B
Amp Output (R)
7 7
H15A H15B Clip Output (R)
8 8
H16A H16B +45V (R)
2,5MM 8W 90 PIN HEADER 2,5MM 8W 90 PIN HEADER
RL2:A
1
D27
2
1N4004
12V 8A RELAY
Speaker A Relay
Q34
MPSA14
H4A H4B
R33
+45V. L
91k 8th
R34
LE1
2k2 8th
RL1:A
1
H3A H3B
D26
LO
2
1N4004
12V 8A RELAY
Speaker B Relay
Q35
MPSA14
R26
LE2
2k2 8th
R25
-45V. L H2A H2B
91k 8th
AP17653/2 Amp PCB Schematic (Protection)
H16A H16B
LK23
+45V. R
LK7,5MM
R100
15k 8th
Q42
R117
MPSA92
120k 8th
R99
R98
100k 8th
D25 120k 8th
H14B D31
RO
1N4148
R97
1N4148
R96 120k 8th
Q44
100k 8th
MPSA42
Q43
MPSA42
R116 R118
R95
2k2 8th 100R 8th
15k 8th
H13A H13B
TH1
LK42
LK7,5MM CN6
ZPP22 100DEG
DGND
1
Mounted on Heatsink
2
3
PIC VI/Short
4
PIC DC Detect
Temp Sense 5
PIC Clip Detect
2,5MM 5W ST HEADER
To input PCB/To PIC
Q37
R71
MPSA42
+45V. R
R84 91k 8th
R72
C64 470R 8th
RE1
2k2 8th
R83 220P 50V CER
C65
820R 8th
220U 16V EL
Q36
MPSA42 RO
R82
C63
470R 8th
R81 220P 50V CER
R64
820R 8th
C66
RE2
2k2 8th
220U 16V EL
R62
-45V. R
91k 8th
H8A H8B
+45V P
R89
15k 8th
R88
100k 8th
D24
H6B
H15BH15A LK22 LO
LK7,5MM
1N4148
R87
R86 120k 8th
100k 8th
Q38
MPSA42
R85
15k 8th
LK3 LK4 H5A H5B
-45V P
LK20MM 24AWG
LK20MM 24AWG
R79
18k 8th
H1B H1A
H9B
R102
R101
47k 8th
Q40 47k 8th
H12A H12B
MPSA42
R94
LK21
470R 8th
C69
LK7,5MM
220P 50V CER
R93
C68
820R 8th
220U 16V EL
Q41
H11A H11B
MPSA42
R92
C70
470R 8th
220P 50V CER
R91
820R 8th
C67
220U 16V EL
H10A H10B
R120
Q39
120k 8th
MPSA92
R90
120k 8th
D32
H7B H7A
1N4148 PIC Clip Detect
Q45
D17
MPSA42
R75
5V1 Zener 400mW
47k 8th
R119 R121
2k2 8th 100R 8th
DGND DGND
LK30
+45V R
LK7,5MM
C62
4,7N 50V CER
Q33
MPSA92
H9A
LK20
LK7,5MM
R74
18k 8th
D18
PIC VI/Short
1N4148
D16
5V1 Zener 400mW
DGND
24