Printed Wiring Board - Base Main Board - Sony SPP-A941 Service Manual

SPP-A941
5-4. PRINTED WIRING BOARD – BASE MAIN Board – •
• Semiconductor
1 2
Location
BASE MAIN BOARD
Ref. No. Location
D1 B-6 A
D3 F-9
D4 B-12
D5 I-12
D8 B-4
D9 B-4
D10 B-4
B
D11 E-4
D12 C-3
D16 C-3
D25 B-7
Q1 I-10
Q2 I-6 C
Q3 I-6
Q4 I-10
J7
Q5 H-9
LINE
Q6 I-4
6
4
Q7 C-6
2
Q8 I-14 1
3
D
Q9 H-14
5
Q10 I-14
Q12 C-11
Q15 C-12
J8
Q16 E-12
– +
Q17 D-6
DC IN 9V
E
U1 H-8
U2 C-6
U3 J-7
U4 H-3
U5 H-6
U6 I-13
U8 E-5
F
U9 F-4
U10 G-12
Z1 D-2
VR1
Z2 C-2
G
H
EC1
+
C19
C18
I
R53
C34 C17
R75
C32
R76
C35
J
05
K
See page 21 for Note on Printed Wiring Board.
3 4 5
D9
R2
D8
D10
R3
F1
U7
R111
L26
C59
D12
LINE EC137
D16 TRANSFORMER
Z2
K A
5
EC134
C131
+
8
EC132
R121
R138 +
Z1
C150
L25 R132
U8
R122
D11
2 3
R141
1 4
Q4
EC150
+
L27
L28
C136
U9
L4
3
C135
1
C52
C6
C25 EC2
+ R59
R55
EC6 EC3
+ +
R72
R95
C20
C57 R93
C23
R56 C39 R85
R91 8
C21 R86 C38
R89
R52
R57
R60 C28
U5
C41 C40
13 12
C26
R90
R92 14
R62
U4
C50
C14
R61 R26 C27
R50
R54
R46
R49
1
24
Q3
R77
R30
C13
B C E
R58 C22
R22
R48
C16
Q2
C12 C53 R23
B C E
R47
R74 VR2
C33
C36
C37 R66
– 23 –
6 7 8 9
D25
A A
D1
E C B Q7
R7 R5
C2 R109
R4
4
R6
U2
C4
1
R8
R9
Q17
R142
R139
R15
R149
EC133
D3
+
A
C15 X1
R105
C7 R27
C9
R67
C30
C10
7
C8
R68
R39
1 28
TP15(RX LOOP VOLTAGE)
C29
R44
R38
R82
R43
R37
1 TP14 (TX LOOP VOLTAGE)
R42
Q5
B C E
R36
R24
U1
R41
R34
R40
R35
R45
14 15 R96
C31
R73 C11
R84 5 4
R29
U3
R64 R25
8 1
R33
C5
R65
10 11 12
C99
R104
R79
R51
Q15
B C E
R71
Q12
B C E
R70
R81
R69
R16 R80
EC4 EC5
R32 +
+
K
K
R20
R17
U10
C48
9 8
R14
18
R13
EC11
R12
+
R11
R10
16 1
EC10
R1
+
C45
R21
R102
13
C3
R19
J1
C44 R101
C42
Q1
B C E 5 4
U6
8 1
C51 C43
D5
R31
1
A K
R100
R28
1
SW1
R108
J2
EC9 EC8
TONE PULSE
+ +
SW1
DIAL MODE
ANT1
RF1
RF
UNIT
– 24 –
13 14
15
+
C97
L21
CHARGE
ATE
TERMINAL
C46
L1
–
C95
L23
MI1
MIC
J3
27
22
R106
A
R107
R98
BASE KEY
J4
BOARD
R103
J2
R99
(Page 28)
R97
1
1
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