Schematic Diagram - Base Main (2/3)/Base Mic Boards - Sony SPP-S2730 Service Manual

6-7. SCHEMATIC DIAGRAM – BASE MAIN (2/3)/BASE MIC Boards – •
L455 L477
TP475
0 0
RED RED
MIC401
BLK BLK
MIC
L456 L478
0 0
CN172
2P
SP401
(SPEAKER)
CN471
TP471
HANDSET
TP472
(LHS SP GND)
TP473
R472
1k
TP474
L471
(LHS MIC GND)
0
R471
2.2k
L474
0
POWER SUPPLY
MJ101
(12V) LINE
L101
TP101
2.2µH
100 Ω
+
C101
100p
- TP102 SG101
500V
L102
F101 C103
2.2µH
0.5A 220p
250V 1kV
C102
0.47
250V
R101
22k
1W
D103
1SS133T-77
J201
TP201
TP202
DC IN 9V
See page 27 for Note on Schematic Diagram.
L479
0
R492 R493 L480
2.2k 1k 0
C497 C500
1 1
L475
0
TP476
L476 0
TP477 (SP GND)
JC471
R480
C492
C487
220
47
L473 4.7
16V
0 50V
L472
0
C481 3300p
R474 10k
C480
0.047
R488
1k
X2
R473
MIC AMP
10k
IC471
TA75S01F
(TE85R) 5
C482
4
0.047
3
2
1
R476
10k
C484 R478
0.1 22k
R477
R487
10k
1k
X3
C483
3300p
C486
C485 R479 22
0.1 22k 25V
R106
C109
D109 D110
10k
100p
1N4004S 1N4004S
500V
C104
220p
D107 D108
RY101
1kV
1N4004S 1N4004S
R107 47k
R102
0
D111
1SS133T
-77
PH101
K817P6
RINGER DETECT TP103
Q101
2SC4081T10
6Q
RELAY DRIVE
C162
22p
R203
D201
0 10
1W
D202
1SS133T-77
+3.3V REGULATOR
IC201
BA033T
I
G
C206 C207
C163
1000 10
22p
16V 50V
0
R481 R482 C491 C493 R489
3.9k 1k 2.2 2.2 1.8k
C490 R484 C488
220p 180 0.047
L481
0
Q471
2SC4081T106Q
RECEIVER AMP
Q472
2SC4081T106Q
R483 RECEIVE
100k
ATTENUATOR
R486
150
R497
1k
Q473 Q474
2SC4081T106Q 2SC4081T106Q
RECEIVE MUTING
ATTENUATOR
R485 R498
100k 47k
C113 R110
R111
TP104 R112
33 16V 4.7k
22
22k
1/2W
R108
C116
220k
Q104
3p
C161
2SC5069-TD
Q102 3p
2SA1576A-T PH102
106-QR K817P6
D114
Q103
R113 6.8k
RD12FB1
2SC4081T10
6Q
R109 C115
470k 3p
PH102,Q102,103 C118
10
BRANCH DETECT
R104
50V
2.2k
R495
R103
33k
B2
D203
1SS133T-77
BATTERY LOW
+5V REGULATOR
DETECT
IC202
IC203
µPC29M05AHF
S-80840
TP204
ANUP-ED4-T2
O I O
G
C209 C212
C211 C213
1000 4700
0.1 0.47
6.3V 6.3V
31 31
(Page 30)
R123 R124
4.7M 4.7M
R132
4.7M
C123
R125 R126
0.033
*
4.7M
R128
1k
R122
TP107
100k
VCC
VEE
C122 R127
0.1 22k R130
470k
R133
680k
R129 22k
TP105 R193
33
C119
10
Q104 C126
50V Q105
C129 C130
10
DC LOOP
2SA1576A-T
3p 0.0015
50V
FILTER 106-QR
TEL LINE
R134 C131
C127
10k B+ SWITCH 47 16V
3p
C117
TP109
3p
T101
C133 R136
R114 C159 3p 15k
15 0.0033
R115
L103
1k
TP110
0
1W
Q106
2SC4081T10
6Q
TEL AMP
C134 3p
C135
0.0015
R135
120
C158
22
R146
68
Q107
2SC4081T10
6Q R145
GAIN 3.3k
CONTROL
O
I
G
X1
SPP-S2730
B1
B2
B3
B4
R147
100k
TP108
BRANCH
DETECT
IC102
BA10358F-E2
B6
B7
TP111
B8
C124 C144
0.047 0
B9
B10
R142 L104
33 0
C147
R140
470
0
10V
(Page 32)
C138 R138
10 50V 22k
C140
470p
C141
10 R148 R139
50V 0 10k
C145 R141 C146
0 0 0.47
TP112
B11
TP256
B12
B13
B14
B15