Sony XM-444W Service Manual ▷ View online
9
9
XM-444W
3-3. SCHEMATIC DIAGRAM — AMP SECTION — • Refer to page 12 for Common Note on Schematic Diagrams.
C101
C201
C202
C105
C205
C103
C203
C104
C204
C111
C211
R101
R102
R201
R202
R103
R104
R204
R203
R110
R111
R112
R113
R213
R211
R212
R210
Q101
Q201
C102
S801
Q107
Q108
Q109
Q110
Q111
Q112
R115
R117
D102
R121
C114
R120
R119
R114
R116
D101
C113
R122
R123
R124
R125
R126
R127
R129
R130
R133
R118
Q105
Q104
Q102
Q103
C112
R131
R215
R214
R216
Q202
D201
C213
R218
Q204
R219
C214
R220
Q205
R217
D202
C212
R231
R221
R232
R223
R222
R224
Q207
C215
R225
Q208
R226
Q210
R229
R233
Q212
R230
R227
Q211
Q209
C116
C216
R235
R135
C115
Q106
R132
Q203
Q206
R136
R236
R106
C107 C108
R107
C857
C861
R862
C862
R206
C207 C208
R207
C858
R138
R139
R238
R239
C119
C120
C219
C220
Q304
Q305
Q303
Q306
Q307
Q308
Q309
Q312
C314
C313
C312
Q404
Q405
Q403
Q406
Q407
Q408
Q409
Q412
C414
C413
C415
C412
C315
Q310
Q410
Q302
R314
R316
R319
R320
R317
R321
R323
R322
R324
R325
R326
R327
R329
R330
R333
R318
D301
D302
R315
R331
R332
Q402
R414
R416
R419
R420
R417
R421
R423
R422
R424
R425
R426
R427
R429
R430
R433
R418
D401
D402
R415
R431
R432
Q311
R336
Q411
R436
C416
R435
C316
R335
Q301
Q401
C305
C405
C303
C403
C404
C304
C311
C411
C401
C402
C319
C320
C420
C419
R301
R302
R403
R304
R404
R303
R311
R411
R412
R312 R313
R413
R310
R410
R401
R402
R338
R339
R439
R438
C306
R409
R408
R309
R308
R209
R208
R109
R108
C307
C308
R306 R307
C859
C864
R864
R863
C863
R861
R406 R407
C407
C408
C406
C117
C118
C217
C218
C317
C318
C417
C418
R137
R237
R337
R437
C301
C302
IC801 (1/2)
IC801 (2/2)
IC802 (1/2)
IC802 (2/2)
IC803 (1/2)
IC803 (2/2)
IC804 (1/2)
IC804 (2/2)
IC805 (1/2)
IC805 (2/2)
IC806 (1/2)
IC806 (2/2)
R128
R228
R328
R428
C860
CN802
C110
C210
C109
C209
VR801
R305
C309
S802
VR802
R405 C409
C410
C310
CNJ802
CNJ801
(Page 10)
10
10
XM-444W
3-4. SCHEMATIC DIAGRAM — POWER SECTION — • Refer to page 12 for IC Block Diagram and Common Note on Schematic Diagrams.
IC B/D
C907
C908
Q852
R856
R857
R858
R851
R852
R853
R854
D852
D851
Q853
Q851
L901
R901
R902
R903
R904
Q901
D901
R905
R906
D902
Q902
C801
R801
R803
R802
D803
D801
R804
IC901
R913
R912
C909
R914
C903
C905
R910
D802
R808
R807
C803
R809
R810
R811
R812
Q803
R813
LD801
R859
C805
PL801
R855
C901
R961
C959
R907
R815
TH802
TH801
D804
R911
R806
R805
R814
D805
C910
R927
R928
R923
R925
Q907
Q908
R921
R922
R919
R920
R916
R918
R915
R917
C913
C914
C911
C912
C915
C916
R929
R930
D905
D906
C917
C918
Q905
Q906
C919
C920
IC851
R909
Q801
F901
CN801
R924
R926
D904
Q903
Q904
T901
D903
D806
TH803
Q802
C851
L951
C852
C853
C854
C804
C904
C906
C802
R865
C902
• Waveform
IC901
5
1
1V/DIV, 5µsec/DIV
15µsec
3.4Vp-p
(Page 9)
11
11
XM-444W
3-5. PRINTED WIRING BOARD • Refer to page 12 for Semiconductor Location and Common Note on Printed Wiring Boards.
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
G
R419
R429
R430
R422
R433
R420
R431
R415
R432
R426
R427
R326
R327
R333
R855
R861
R863
JR10
R121
R132
R961
R864
R862
R126
R127
R226
R227
R928
R926
R225
R125
R337
JR9
R437
R137
R237
JR2
R212
R318
R332
R930
R851
R929
R112
R418
R425
R428
R328
R228
R128
C413
R336
R423
B C E
R424
R421
R414
R417
R417
JR4
R413
R329
R330
R330
R316
R325
R323
R324
R324
C313
C314 R314
R317
R313
R852
Q851
Q853
Q901
Q801
Q802
C414
C860
R402
R302
C319
C320
CNJ802
HI LEVEL
(REAR)
(FRONT)
C219
C220
C220
C119
C120
C120
C420
C419
C308
C304
R303
C307
R409
R310
R408
C311
C408
R407
R321
R338
R301
JR1
C104
R103
R138
R101
C959
C862
C111
R113
R114
R117
R117
R118
R110
R133
1-684-682-
C114
R210
R206
IC802
1
4
8
5
1
4
8
5
8
5
1
4
8
5
1
4
8
5
1
4
1
4
8
5
IC803
IC901
IC801
IC805
IC806
IC804
R106
R107
C107
C108
R108
R109
R115
C113
C214 R217
R214
R233
R213
R915
R904
R906
R907
C805
R917
R927
R924
R925
R923
T901
DC-DC CONVERTER
TRANSFORMER
R901
R920
R918
R919
R922
R921
R913
R914
R815
R859
C853
C415
C412
C804
C802
C854
C905
C903
8
1
9
16
C914
C913
C915
C916
C917
C851
C312
C215
C115
C112
C920
C209
C210
C109
C110
C212
C918
C919
C315
C410
C309
C409
C406
C310
C306
C101
C102
C202
C861
C402
C302
JW20
C301
C401
C201
C904
C908
TH801
C910
C907
C901
C116
C416
C216
C911
C912
C316
R802
R810
LD801
R808
R807
C803
R436
R814
R905
R865
R916
R805
R806
R909
C852
JW152
R135
R435
R235
JW155
R335
JW154
JW153
JW150
JW145
JW99
JW76
JW136
JW135
JW144
JW142
JW143
JW139
JW138
JW124
JW151
JW131
JW156
JW133
JW110
JW109
JW108
JW107
JW105
JW104
JW104
JW106
JW102
JW101
JW72
JW73
JW113
JW112
JW111
JW111
JW114
JW115
JW116
JW117
JW53
JW132
JW103
JW75
JW78
JW90
JW91
JW96
L951
JW95
JW94
JW93
JW93
JW88
JW89
JW92
JW87
JW2
JW11
JW32
JW54
JW55
JW19
JW18
JW21
JW31
JW30
JW10
JW86
JW85
JW69
JW70
JW71
JW84
JW67
JW68
JW66
JW74
JW77
JW65
JW64
JW63
JW62
JW61
JW60
JW79
JW83
JW1
JW6
JW4
JW5
JW12
JW3
JW13
JW17
JW29
JW33
JW28
JW35
JW38
JW36
JW37
JW39
JW34
JW27
JW42
JW40
JW47
JW46
JW41
JW43
JW45
JW44
JW26
JW16
JW15
JW14
JW22
JW23
JW24
JW25
JW9
JW8
JW7
JW80
JW81
JW82
JW100
JW134
JW149
JW146
JW137
JW140
JW141
JW147
JW148
R858
R813
R811
R812
R236
R136
JR8
R809
R803
R801
C801
R902
C902
R903
R912
C909
R911
R910
C906
D804
JR7
R856
R857
R804
C213
R215
R129
R223
R224
R123
R124
Q107
R319
R320
R331
R322
R854
R412
R312
R315
R339
R309
R307
R306
R411
R311
R410
C859
R305
C118
C117
C864
C863
R308
C411
C417
C418
C317
C318
C217
C218
C303
R406
C407
R405
R304
C305
JR3
R853
JR6
JR5
C857
R131
R130
R122
B C E
Q112
B C E
D101
D102
Q101
E C B
Q203
D201
D202
Q201
E C B
D905
D402
Q401
E C B
D852
D906
Q301
E C B
Q307
E C B
Q803
B C E
Q412
B C E
D802
D801
D803
IC851
Q852
E C B
Q902
B E
C
Q407
E C B
Q312
E C B
D301
JW56
JW57
JW58
JW48
JW49
TH803
JW51
JW50
JW52
JW119
JW120
JW128
JW129
JW118
JW130
JW127
JW126
JW125
JW123
JW122
JW121
JW59
D851
D805
D806
D302
Q302
Q303
Q402
Q403
Q202
Q103
Q102
Q212
E C B
Q907
E C B
D401
D902
D901
Q908
E C B
Q207
B C E
R120
R222
R229
R231
R232
R221
R230
R218
R216
R220
R219
R119
R116
R207
R208
R209
C208
C207
R211
C211
R111
C858
C403
C404
C405
R404
R401
R403
R438
R439
C203
C204
C205
R204
R201
R203
R239
R238
R202
R102
R139
C103
R104
C105
R416
Q408
Q409
Q406
B C E
Q306
Q405
Q404
Q308
Q305
Q304
Q309
Q209
Q208
Q204
Q205
Q109
Q905
Q906
Q206
TH802
PL801
Q106
Q108
Q105
Q104
S801
VR801
VR802
C
E
E C B
E C B
B
C
D904
K A K
D903
A K A
Q211
B
C
E
-1
-2
-1
-2
F901
40A
CN801
REM
+12V
GND
S801
HPF(80Hz)
(FRONT)
VR801
LEVEL
(FRONT)
ON
OFF
S802
LPF(80Hz)
(REAR)
VR802
LEVEL
(REAR)
ON
OFF
CNJ801
INPUT
(REAR)
(FRONT)
-3
L (BTL)
-4
R
-1
L (BTL)
-2
R
-2
-1
S802
-2
-1
R
L
R
L
11
AMP BOARD
E
C
B
Q410
E
C
B
Q411
E
C
B
Q310
Q311
E
C
B
Q111
B
Q110
E
Q210
B
C
E
Q904
G D S
Q903
G D S
L901
POWER/
PROTECTOR
LD801
L
R
BTL
SPEAKER OUT
(REAR) (FRONT)
CN802
12
XM-444W
IC901 µPC494GS-T1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
OSC
REF. REG.
ERROR
ERROR
0.1V
• IC Block Diagram
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for schematic diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
1
and
1
/
4
W or less unless otherwise
specified.
•
2
: nonflammable resistor.
•
A
: B+ Line.
•
B
: B– Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from +12V and REM terminals.
• Voltage is dc with respect to ground under no-signal
condition.
• Voltages are taken with a VOM (Input impedance 10 M
1
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: AUDIO
for printed wiring boards:
•
X
: parts extracted from the component side.
•
: Pattern from the side which enables seeing.
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
• Semiconductor Location
D101
F-12
D102
F-11
D201
F-10
D202
F-9
D301
C-10
D302
C-11
D401
D-7
D402
C-8
D801
E-3
D802
E-6
D803
D-3
D804
E-4
D805
D-5
D806
D-5
D851
D-9
D852
D-9
D901
F-3
D902
F-4
D903
H-7
D904
H-6
D905
E-10
D906
D-10
IC801
E-12
IC802
G-13
IC803
F-12
IC804
D-11
IC805
C-11
IC806
B-12
IC851
D-3
IC901
E-4
LD801
E-3
Q101
F-11
Q102
F-11
Q103
F-11
Q104
G-11
Q105
F-11
Q106
H-11
Q107
G-10
Q108
F-11
Q109
F-10
Q110
H-11
Q111
H-10
Q112
G-12
Q201
E-9
Q202
F-9
Ref. No.
Location
Ref. No.
Location
Q203
F-9
Q204
G-9
Q205
F-9
Q206
H-8
Q207
G-8
Q208
F-8
Q209
F-8
Q210
H-9
Q211
H-8
Q212
F-10
Q301
D-10
Q302
C-10
Q303
C-10
Q304
C-10
Q305
C-10
Q306
B-9
Q307
C-9
Q308
C-9
Q309
C-9
Q310
B-9
Q311
B-10
Q312
D-9
Q401
D-10
Q402
C-8
Q403
C-8
Q404
C-7
Q405
C-7
Q406
B-7
Q407
B-7
Q408
C-6
Q409
C-7
Q410
B-6
Q411
B-7
Q412
B-6
Q801
E-3
Q802
E-3
Q803
D-2
Q851
D-10
Q852
D-4
Q853
D-4
Q901
F-3
Q902
E-4
Q903
H-5
Q904
H-4
Q905
E-10
Q906
E-10
Q907
F-6
Q908
G-6
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