Sony MZ-B50 Service Manual page 65

PRINTED WIRING BOARDS – MAIN Section(1/2) – (Last digit –21:US, CANADIAN MODEL)
A
Semiconductor Location
z
Ref. No. Location Ref. No. Location
D301 C-10 Q104 I-9
D302 B-10 Q105 I-9
D303 H-8
B
D501 F-5 Q106 C-6
D602 D-3 Q201 B-9
Q202 B-9
D603 D-9 Q204 H-9
D901 D-7 Q205 H-9
D905 C-7
D906 C-7 Q206 C-6
Q301 B-9
C
Q303 B-10
IC301 H-8 Q304 G-10
IC302 C-5 Q305 B-8
IC303 B-8
IC304 B-4 Q306 C-8
IC305 G-9 Q307 C-9
Q308 C-9
IC307 F-9 Q309 C-10
D
IC308 H-9 Q312 H-10
IC309 H-10
IC310 G-9 Q313 G-8
IC311 F-10 Q314 G-8
Q315 G-10
IC501 F-5 Q316 H-10
IC502 F-6 Q321 C-8
IC504 G-7
IC505 F-7 Q322 H-10
E
IC601 E-8 Q325 C-9
Q331 F-8
IC602 D-8 Q332 F-8
IC603 D-4 Q333 G-8
IC604 D-8
IC605 D-8 Q334 I-8
IC801 H-6 Q338 B-4
Q501 D-5
F
IC802 H-7 Q603 C-5
IC803 H-7 Q604 C-5
IC804 H-6
IC901 D-6 Q605 D-8
IC904 B-2 Q607 D-9
Q809 I-7
IC905 D-3 Q901 B-3
IC906 F-4 Q904 B-7
G
Q905 B-3
Q101 B-9 Q906 B-3
Q102 B-9 Q907 F-4
Q103 B-4
H
I
1 2 3
MAIN BOARD (SIDE A)
C908
5
C907 1 Q906
R941 R940
S G IC304
R944 C933
D
3 4
4
C924
Q905
E B
C G 5
D
C905
Q901 S
C323
R908
E
A
BATT BOARD
C602
D602
R945
4
5
1 3
C936
OPTICAL PICK-UP
BLOCK
LCX-2R
C961
IC906
R946
MIC1 SWITCH & LCD MIC2
MIC MODULE UNIT MIC
SP1
SPEAKER
4 5 6
R318
C318
C326
C218
C325
3
R218
R212
R201
R309 R118
1
C211
R101
C322
C111
R112
C240
C140
Q206
R248 R247 C915
IC302
R147
B R148
B
C 4 C216
5
C
C116
E
C928
8 1
Q106
C927
B
C213
R930
C
Q604 E C923
R606
R935 36 35
R612
R611 R927 37
C603
R928
C614
40
C922
IC603
R938
C605 45
R909
48
C921
R931
1
C925
R522
C530
L502
Q501
X501
R506
CN501
C512
C529
IC501
*
IC502
C960
R947
Q907 R526 R524
C1001
R525
C537
CN801
C534
X801
R807 R850
R803
BP801
IC804
R804
SHORT: TEST MODE
5
OPEN: NORMAL MODE
*
6
IC801
R838
L801
C814 C806
GND
9 9
7 8 9
Q305
C315
L302 D
C324
G
R317 R208
S
R301 C319 R108
C101
1
8
Q904
IC303
S
D
5 R109
G
4
D906 Q102
D905
BCE
C209
R322
R128
R305
R228
R929
Q321
30 25
C910
Q308
Q306
R913
24
16
20 1
C932
IC901
15
CN802
C919
15 D901 5
IC604
IC602
13
R905
10
8
9
12 Q605
5 10
R618
R939
C913
R620
3 1
D603
IC605
C911 D
48 45 40 37 G S
5
4
Q607
36 C637
1
35
IC601
5
30
10
12
25
13 15 20 24
C630
C376 IC307
Q331
C126
C 1 8
C226
B E
IC505 5
4
C348
R377 R378
8 5
C351 C352
R342 R343
Q333 Q313
C119 R106
C532
1
4
1
8
1 8
R345
R344
C112
4 5
4 5 G
C110
S C139
IC504
D
C519
Q314
C301
C103
64 60 55 50 49
5
C210
1
1
4
48
1
45
5
1
C203
40
IC301
10
IC802
4
35
15
10
33
16
5 8
IC308
C303
C801 17 20 25 3032 C208
X802
C309
C235
4 5 8
3
C236
C304
C308
1
5
R830 R831 R833
C307
Q334
C130
Q104
L303
Q809
MZ-B50
10 11
Q201
R229 R223 C207
FB309
C317
R129 R123
FB308
C107
R207 FB307
Q301
5 4
Q303
D302
Q202
1
2 3
BCE
FB333
Q309
Q307
C311
BCE
C313
C331
5 4
FB306
D301
FB305
1 2 3
C314
Q325
C316
SWITCH
UNIT
CN602
MD
MECHANISM
5 4
IC311
1 3
C369
C334
R326
Q315
R325
C336 R347
C345
4
IC305
Q304
C346
3
C333
Q205 C302
C339
G
S
D R350
Q204 R234 R349
C363
Q312 1
5
S
G
D 4
3
R134
C364
Q105
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