Project 12 Amplifier Diagram - SPHINX Project Twelve Service Manual

SPHINX
C11 C12
R7
220uF/100V 100nF 820R
59V
GND
R6
120K
9.3V Q2
2SC1775
C3
R5
1uF
22K
1.4mA
GND
R1
D1
Sig1+
1K
Sig2+
C2
R2
220pF 18K
P1
200R
GND
R9
22R
P3
100R
Sig1-
Sig2-
2.75mA
C1 R11 GND
1nF
1K
Agnd1
Agnd2
Q4
GND
2SC1775
GND
R12
C15 C14 475R
220uF/100V 100nF
Opto+
Bias
17
R35
Opto1 a
A
220R
b
B
GND Opto-
Project Twelve
60.5V
R22
2R2
R8 R16
820R 56R
R15 R17
59V
Q6
39R 39R
Q5
2SA970
2SA970 C5
100 pF
Q3
2SC1775
R14
18K C4
1.4mA
100nF
Q1 opto+
R4
D2
18K
2SK389
R18
3K3
opto-
P2
R3
604R 200R
Q9
R10
2SC2240
22R
3.75mA R19
220R
R46 3.75mA
604R
GND
R13
22K
Q7
Q8
2SC2240
2SC2240
D1
+
C9
R20 R21
100nF 300R 300R
R23
2R2
-60.5V
1 +60V
2SC1775
1
Q16
D17
R36 D2
C19
1N4007
100R 1N4148
1N
5mA 70mA 100mA 100mA
Q10 R25
2SC2705
22R
Q12 R28 R37
2SC4382 100R 100R
M14
2SK1529
R30
0.22R
R24 R27
5V 3.93V
C6
1K 56R/2W
100nF
A
R31
0.22R
B
M15
2SJ200
R29 R38
R26
68R 68R
22R
Q13
2SA1668
Q11
2SA1145
5mA 70mA 100mA 100mA
RL1
REL1
14
Service Manual

Project 12 amplifier diagram

C131 C132 C133
C129 C130
C141 C141 C140 C139 C138
+ + + + +
100mA 100mA
R41
100R
M17 M19
2SK1529 2SK1529
D6
1N4007 16
R38 R43 R44
0.22R 0.22R 22K
L1
EE-K-021
R33
R40 R45
0.22R 0.22R
10R/5W
R32 R34
47R/2W 10R/5W
M18 M20
2SJ200 2SJ200
D7
1N4007
C7
47nF
R42
68R
GND
100mA 100mA
C114 C113 C115 C116 C117
+ + + + +
C126 C125 C124 C123 C122
GND
C134 C135
C137 C136
+ +
C112
C220nF/250V
R48
470R / 2W
GND
R49
470R / 2W
D3
ZY15V
1
GND
D4
ZY15V
C8
330nF
2 R50
470R / 2W
GND
R51
C118 C119
470R / 2W
+ +
C111
220nF/250V
C121 C120
GND
16