Schematic Diagram - Base Main (2/3)/Base Mic Boards - Sony SPP-A2770 Service Manual

6-7. SCHEMATIC DIAGRAM – BASE MAIN (2/3)/BASE MIC Boards – •
L455 L477
TP475
0 0
RED RED
MIC401
MIC BLK BLK
L456
L478
0
0
CN172
2P
SP401
(SPEAKER)
POWER SUPPLY MJ101
(12V) LINE
L101
TP101
2.2µH
100Ω
C101
+
100p
- TP102 SG101 500V
L102
F101
2.2µH
0.5A
250V
C102
0.47
250V
R101
22k
1W
D103
1SS133T-77
J201 TP201
TP202
DC IN 9V
See page 25 for Note on Schematic Diagram.
L479
0
R492 R493 L480
2.2k 1k 0
C497 C500
1 1
L475
0
TP476
L476 0
TP477
R106
C109
100p 10k
D109 D110
500V
RL1N4004 RL1N4004
-FW -FW
C103 C104
D107 D108
RY101
220p 220p
RL1N4004 RL1N4004
1kV 1kV
-FW -FW
R107 47k
C153 10p
C154 10p
D111
1SS133T
-77
PH101 R102
K817P6 0
RINGER DETECT TP103 Q101
2SC4081T10
6Q
C155 C156
RELAY DRIVE
10p 10p
R203
D201
10
0
1W
D202
L203
1SS133T-77
0
L204
+3.3V REGULATOR
IC201
BA033T
I
G
C206 C207
1000 10
16V 50V
R110
R111
4.7k 22
C113
R112
TP104 1/2W
33 16V
22k
Q104
R108
2SC5069-TD
C116
220k
3p
C161
3p
Q102
D114
2SA1576A-T PH102
RD12FB1
106-QR K817P6 C117 3p
Q103
R113 6.8k
2SC4081T10
6Q
PH102,Q102,103
R109 C115 R114
470k 3p BRANCH DETECT 15
R104 C118
2.2k 10 50V
R495
R103
33k
B2
D203
1SS133T-77
+5V REGULATOR BATTERY LOW
DETECT
IC202
µPC29M05HF
IC203
TP204
S-80840
O I O
G
C209 C212
C211 C213
1000 4700
0.1 0.47
6.3V 6.3V
31 31
(Page 30)
TP105
C119
R193 R142
10
33 33
50V
TP106
C129 C130
C147
Q104 Q105
3p 0.0015
470
2SA1576A-T
DC LOOP
10V
C126 106-QR
FILTER
R134 C131
C127
10 B+ SWITCH
10k 47 16V
3p
TP109
R115 C133 R136
C159 3p 15k
1k
0.0033
1W
C141
L103 10
TP110
0 50V
T101
LINE TRANSFORMER
Q106
2SC4081T10
6Q
TEL AMP
C134 3p
C135
0.0015 R137 C137
R135
10k 3p
120
TP112
TP254
R252
6.8 Q253
R254
1/2W 2SD1758
5.6
C251
R259
C158
10 2.2
22
1/2W
D254 D253
1SS133T 1SS133T
R146 R253
68 47k
Q252,253
R255
CHARGE CONTROL
220k
Q252
2SA1576A
O
I Q107
2SC4081T10 R145
G
6Q 3.3k
R257
GAIN CONTROL 10k
R256
100k
SPP-A2770
B1
B2
B3
(Page 32)
R147
TP108
100k
B3
B4
TP111
B5
C144
0
B6
B7
L104
0
R140
0
C138 R138
10 50V 22k
C140
470p
R148 R139
0 10k
C145 R141 C146
0 0 0.47
L251
1µH
TP251
+
C255
CHARGE
L252
0.1
TERMINAL
1µH
TP252
-
C252
100p
A5
R251
680
Q251
2SC4081
(Page 30)
CHARGE
LED
DRIVE
B11
B12
B13
B15
(Page 32)