Printed Wiring Boards - Sony XM-255EX Service Manual

XM-255EX/255NX

3-2. PRINTED WIRING BOARDS

• Semiconductor
MAIN BOARD
Location
Ref. No. Location
D301 F-4
D302 G-4
D401 D-4 A
D402 E-4
D501 B-2
D903 C-5
D904 D-7
D908 A-3
D909 B-3
SW501
D912 C-5
TEST
SW501
TONE
IC101 F-3 J510
B
IC201 D-3
IC301 D-2 R511
C503
IC401 B-2
R509
IC901 C-6
R508
C501
R503
Q301 F-4
R501
Q302 G-4
Q303 F-4
Q304 F-5
SW101
Q305 G-5 FILTER
C
OFF
Q306 G-5
Q307 G-5
LPF
Q308 G-5
Q309 G-5
J126
Q310 F-6
R216
Q311 G-6
Q312 G-6
VR101
Q401 D-4 FILTER
Q402 E-4
D
Q403 D-4
Q404 D-5
VR102
Q405 E-5
LEVEL
Q406 E-5
Q407 E-5
Q408 D-5
Q409 E-5
Q410 D-6
L L L
Q411 E-6
OUTPUT
Q412 E-6
E R R
Q901 C-7
Q902 C-7
Q903 C-7
L
Q904 D-7
INPUT CNJ101
Q905 D-7
R R
Q906 D-7
Q907 D-7
Q908 D-7
Q941 C-5
F R
C116
Q942 C-4
CNJ301
Q943 A-2
HIGH LEVEL
C117
Q944 A-2 INPUT
Q946 B-5
C217
L
Q947 A-6
Q948 B-6
Q949 B-5
Q963 C-4
Q964 D-4
G
Q965 C-4
1
09
C952 C953
PL901
J914
J912
ZD910
J928
R950
R951
C948
Q943
D908
Q944
E
J915
E
C946
C945
J512
J911
J913
C951
C949
J513
D909
D501
8 5
J511
R507
IC401
J916
R502
1 4 C950
R505
C502 R504
C114
SW101
C113
C961
C111
C962
R962
C214
C213 E
E
C211
-4 -3 -2 -1
R112
J122
C110
J121
R116
J123
C210
C118
8
R117
5
-2 -1
R217
IC301
C112
J196
J415
1 4
J193
J327
8
5
VR102
IC201
C936
J120
1 4
J119
C202
J118
C212
J491
C201 J420
J117
R211
J106 R210
R111
R110
C101
C105
C209
J105
J115 J114
J107
J104 J108
C102
R101 R104
R102
8 5
J103
C221
J112
J111
J102 IC101 Q301
C222
J101
1 4
R956 E
R201
C301
R301
R202
D301
J315
Q303
C203
Q302
R139
R307
C216 R239
D302
2 3 4
C933
R945
Q947
S
T901 J934 J933
L901
Q946 Q949
E E
R948
R947
C944
R946
R941
Q948 C941
R949
S
J917
J918
R954
J919
R953
ZD913
C905
E E
C904
C930
J932
D912 J920
9 16
J931 C906
R914
J994
R963 J924 IC901
R916 C908
R959 R917
E
8 1
J991
J923
J921
1
J922
J922 Q410
C910
R408 R409
C401
J937 R923
E
E
R401
J938
J411 C403
E
E
Q404 J412
R420
R410 Q408
E
J410
E
R424
R404
E
C402 R416
R421
R403 Q407
E
R414
R405
E E Q405
C404 Q409
R415 E
R407 R406 R411
Q411
Q406 R422
D402
R413
R412 E
R419
E
R417
J431
J421
E
J422
J423
TH901
J322
J323
J427
J321 Q310
J311
R318
C303
J313
Q304
E
R320
R310
J314
E
J312
R304
Q308
E R317
R303 R324
R316
C302
C304 Q307
R321
R305 E
R314
E Q305 Q312
R306
R315
Q311
R313 Q309 E
E
R322
R308
R309
E
E
1-677-608-
5 6
8 8
• WAVEFORMS
1
31 µ sec
2
F901 F901
31 µ sec
20A
C943
J945
REMOTE
J935
C901
+12V
J944
C903
GND
J943
Q901
Q903
E
E
E ZD901
ZD902
R904
Q902
J936
R905
C909
CN901 CN901
R906
V+
Q908
E
GND
Q904
THR
D904
R939
E
CUR
R930
J940 OFF
Q905 J941
E
R925
R924
Q907
E
CN201
J939
J951
SPEAKER OUT
R426 R425 A
C408 L
L+R MONO
R326 R325
J952
B
C308
R
09
11
7 8
3
28Vp-p
12.8Vp-p
31 µ sec
4
12Vp-p 56Vp-p
31 µ sec
• IC BLOCK DIAGRAM
IC901 TL494CN
16 15 14 13 12 11 10 9
REG.
REF.
ERROR
ERROR
OSC
0.1V
1 2 3 4 5 6 7 8
LED BOARD
E
E
Q913 E
R936
PN901
V+
GND
E
THR
R935
D906 D907 D905
CUR
OFF
E
Q911
R942
1-677-341- 11
E
1 2