Schematic Diagram - Main Board (1/3) - Sony MDR-NC500D Servise Manual

5-4.

SCHEMATIC DIAGRAM - MAIN Board (1/3) -

TP182 D/U(+)
TP183 D/U(-)
TP131 MIC(FF) SIG
TP132 MIC(FF) GND
TP101 MIC(FB) SIG
TP102 MIC(FB) GND
TP837 U-COM
(Page 21)
TP161 SOUND(L)
TP261 SOUND(R)
TP361 SOUND(GND)
TP471 VDD FB472 0
TP472 GND FB471 0
C470
2200p
IC471
XC61GN3002HR
TP478
C475
0.1
C474
100
10V
TP479
R479 C478
330k
R478
220k
C476 C477
47 0.01
10V
R490
470k
Q475
DTC115TE
INVERTER
R485 C486
750k 33p
4.7µH
C484 C485 R484
47 0.01 750k
10V
TP201
MIC201
NOISE DETECT
(R-CH)
TP202
TP231
MIC231
MONITOR
(R-CH)
TP232
HOUSING TP238
PLATE
MDR-NC500D
• See Page 15 for Waveforms.
(1/3)
FB182 0
FB183 0
FB131 0
FB132 0
FB101 0
FB102 0
FB161
FB261
FB361
TP473
C472 0.1
C471
R471
100
10k
10V
R472
470k
VOLTAGE
DETECT
Q476
2SD2654
AMP
R457 R477
OFF SWITCH 1M 220k
S
Q472
Q472,473
CPH3303
B+ SWITCH
Q473
2SC2712L
R499
DC/DC CONVERTER 0
R495
100k
R494
33p 47k
TP474
R480 R481 C479
330k 150k 33p
L472
4.7µH
C480
L471 C495 R482 C481
22
4.7µH 10 33k 0.01
IC472 10V
LTC3547B
C494 C482
C483
10 22
0.01
10V
R492 100
TP475
Q474
SCH2401
SWITCHING
C499
0.01
R491
DC/DC CONVERTER 100
R496
0
R487 C487 C489
R486
750k 33p 0.01
470k
L473
L474
4.7µH
C488
C496 R470 IC473 C497 R488 22
10 0 LTC3547B 10 200k 10V
C490
C492
22
0.01
10V
C498
0.1
TP477
FB201
0
FB202
C201
0
4700p
FB231
0
FB232
C231
0
4700p
• See Page 22 for IC Block Diagrams.
D262 D263
1SS380 1SS380
R266
R267
C263 0
1k
330p
R162 R274 R268
1k 22k 4.7k
R262 C261 R264
1k 0.15 22k R269
0
R263 D264 D265
0 1SS380 1SS380
C262
R161 R261
0.01
39 39
R271
4.7k
C363
C264
0.1
0.1
LINE AMP
IC361
NJM2734
R277
100
R272
TP262
D101 D102
R101 R102 R103
1SS380 1SS380 R131
2.7k 10k 3.9k
2.7k
2SD2654
R105
0 MIC BIAS
C103 C104
2.2 10p
R106 1k
R107
22k
RV101 R108
47k D103 D104 0
1SS380 1SS380
C102 C132
0.1
RV101
CANCELING GAIN
LINE AMP
IC301
NJM2734
R202 R203 D201 D202
10k 3.9k 1SS380 1SS380
R469
100k
R206 1k
C204
10p
R205 0
R493
10k
R201 R207 RV201
2.7k 22k
CANCELING GAIN
RV201
C203
47k
2.2 R208
0
C202 D203 D204
0.1 1SS380 1SS380
17 17
D162 D163
1SS380 1SS380
R166
0
C161
0.15
C163 R167
330p 1k
R164 R174
R168
22k 22k
4.7k
R163 D164 D165
R169
0 1SS380 1SS380
0
C162
0.01
R171 4.7k
C361 C362 C164
0.1 10 0.1
10V
R172 4.7k
4.7k
R177
100
TP162
D131 D132
R133
4.7k 1SS380 1SS380
R130
Q130 47k R135
0
C135
10p R136 1k
R140 R137
0 10k
C133
R138
2.2
0
C134
C130
0.1 D133 D134
4.7
0.1 1SS380 1SS380
10V
C234
C301 0.1
0.1 C302
10
10V
R232 R233 D231 D232 R235
10k 4.7k 1SS380 1SS380 0
C233
2.2
C235 R236
10p 1k
R231 R240 R237
R230
2.7k 0 10k
47k
R238
Q230
0
2SD2654
C230
MIC BIAS
C232 4.7 D233 D234
0.1 10V 1SS380 1SS380
MDR-NC500D
A01
A02
A03
A04
A05
A06
TP103
A07
R111 0
A08
TP104
SL101
TP203 TP204
SL201
A09
(Page 18)
R211
0
A10
A11
TP133
A12
TP233
A13
TP333
A14
A15
A16
A17
D-GND
DSP-GND
D-2.8V
D-1.35V
LI-ION
LCHV+
(Page 19)
DD_CE