Sony XM-440EX Primary User manual

1
MICROFILM
XM-440EX/440NX
SERVICE MANUAL
STEREO POWER AMPLIFIER
SPECIFICATIONS
Canadian Model
AEP Model
E Model
XM-440EX
UK Model
XM-440NX
Photo : XM-440EX

2
Specifications ............................................................................. 1
1. GENERAL ....................................................................... 3
2. DISASSEMBLY
2-1. Main Board Removal ...................................................6
3. DIAGRAMS
3-1. Block Diagram..............................................................7
3-2. Printed Wiring Boards ..................................................9
3-3. Schematic Diagrams –MAIN (1/2) Section –.............10
3-4. Schematic Diagrams –MAIN (2/2) Section –.............11
4. EXPLODED VIEW...................................................... 12
5. ELECTRICAL PARTS LIST.................................... 12
TABLE OF CONTENTS

3
SECTION 1
GENERAL This section is extracted from
instruction manual.

4

5

6
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. MAIN BOARD REMOVAL
1 Two screws (+BTP3x4
)
2 Two screws (+BTP3x4)
3 Bottom plate
4 Screw
(+BTP3x8)
5 Two screws
(+BTP3x6)
7 Two screws
(+BTP3x8)
9 Screw
(+BTP3x4)
0 Screw
(+BTP3x4)
qa Main board
(Remove the direction of arrow)
8 Two screws
(+BTP3x8)
6 Two screws
(+BTP3x6)
Heat sink

XM-440EX/440NX
7
7
SECTION 3
DIAGRAMS
3-1. BLOCK DIAGRAM
DIFFERENTIAL
AMP
Q263
6
7
PRE
AMP
IC101 (2/2) IC202 (1/2)
CN303
INPUT FILTER
L
(MONO)
HIGH
LEVEL
INPUT
L
R
5
2
FILTER
CN904
IC203 (1/2)
3
3 1
H.P.F
IC202 (2/2)
6 7
L.P.FRV101 (2/4)
FILTER
SW101 (2/2)
LEVEL
RV102
HPF
RV101 (4/4)
IC203 (2/2)
6 7
L.P.F
FILTER
OFF
LPF
1DRIVE AMP
Q204
DRIVE AMP
Q204
DRIVE AMP
Q204
DRIVE AMP
Q204
DIFFERENTIAL
AMP
Q263
DRIVE AMP
Q204
DRIVE AMP
Q204
DRIVE AMP
Q204
DIFFERENTIAL
AMP
Q202
REAR
SPEAKER
OUT
REAR
DIFFERENTIAL
AMP
Q263
7
PRE
AMP
IC101 (2/2) IC202 (1/2)
INPUT
CNJ301
(3/4)
CNJ301
(4/4)
FILTER
R
5
2
FILTER
IC203 (1/2)
3
3 1
H.P.F
IC202 (2/2)
6 7
L.P.FRV101 (2/4)
FILTER
SW101 (2/2)
LEVEL
RV102
HPF
RV101 (4/4)
IC203 (2/2)
6 7
L.P.F
FILTER
OFF
LPF
1DRIVE AMP
Q204
DRIVE AMP
Q204
DRIVE AMP
Q204
DRIVE AMP
Q204
6
DIFFERENTIAL
AMP
Q203
6
7
PRE
AMP
IC101 (2/2) IC202 (1/2)
CN302
INPUT FILTER
L
(MONO)
HIGH
LEVEL
INPUT
L
R
5
3
FILTER
IC203 (1/2)
2
3 1
H.P.F
IC202 (2/2)
6 7
L.P.FRV101 (2/4)
TEST TONE
SW501
TO REAR
FILTER
SW101 (2/2)
LEVEL
RV102
HPF
RV101 (4/4)
IC203 (2/2)
6 7
L.P.F
FILTER
OFF
LPF
DRIVE AMP
Q204
DRIVE AMP
Q208
BIAS
Q206,207
POWER AMP
Q210
DIFFERENTIAL
AMP
Q202
DRIVE AMP
Q205
DRIVE AMP
Q209
POWER AMP
Q211
OVER ROAD
DET
Q212
L
L+R
FRONT
R
DIFFERENTIAL
AMP
Q103
1
PRE
AMP
IC101 (1/2) IC102(1/2)
+B
INPUT
CNJ301
(1/4)
CNJ301
(2/4)
FILTER
R
2
3
FILTER
LINE
SWITCH
Q101
LINE
SWITCH
Q201
IC103 (1/2)
2
3 1
H.P.F
IC102 (2/2)
6 7
L.P.FRV101 (1/4)
FILTER
SW101 (1/2)
LEVEL
RV102
HPF
RV101 (3/4)
IC103 (2/2)
6 7
L.P.F
FILTER
OFF
LPF
DRIVE AMP
Q104
DRIVE AMP
Q108
BIAS
Q106,107
POWER AMP
Q110
DIFFERENTIAL
AMP
Q102
DRIVE AMP
Q105
DRIVE AMP
Q109
POWER AMP
Q111
OVER ROAD
DET
Q112
3
1
OP AMP OP AMP
IC501 (2/2)
2
3
7
IC501 (1/2)
5
6
CN901
REMOTE
11
10
1
2
15
3
8
9
12 REF-REG
INVERTER
Q918
INVERTER
Q917
D904
DRIVER
Q915
T901
DC-DC CONVERTER
TRANSFORMER
PROTECTOR
Q904,905
D908
D910
B3+
B1+
B2+
B1-
B2-
B3-
D911
DC DET
PH902
DC-DC
CONVERTER
IC901
16
DRIVER
Q916
+12V
GND
09
POWER
ON/OFF
Q903
+B
SWITCH
Q901,902
TEMP • DET
TH902,903
LINE CONTROL
Q921,922
POWER/
PROTECTOR THERMAL LED
DRIVE
Q908
14
LED
DRIVE
Q906,907
OFFSET
DET
Q923-925
B+REG
Q919
B-REG
Q920
L
R
CN903
MONO
L+R MONO
1
1
D905
POWER/
PROTECTOR OVER CURRENT
D907 POWER/
PROTECTOR OFF SET
D906
SWITCH
Q909,910
SWITCH
Q911,912
SWITCH
Q913,914
(REAR)
• Signal path
F: AUDIO
FRONT
SPEAKER
OUT

8
XM-440EX/440NX
8
• IC BLOCK DIAGRAM
IC901 TL494CN
• WAVEFORMS
1
2
3
4
12.8Vp-p
31
µ sec
12Vp-
p
31 µ sec
28Vp-
p
31 µ sec
56Vp-
p
31 µ sec
4
12 3 5 6 7 8
91016 15 14 13 12 11
ERROR
0.1V
REG.
REF.
OSC
ERROR
THIS NOTE IS COMMON FOR
PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS.
(In addition to this, the necessary
note is printed in each block.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise
noted. pF:µµF 50 WV or less are not in-
dicated except for electrolytics and
tantalums.
• All resistors are in Ωand 1/4W or less un-
less otherwise specified.
•C: panel designation.
•U: B+ Line.
• Power voltage is dc 14.4V and fed with
regulated dc power supply from ACC and
BATT cords.
• Voltages and waveforms are dc with re-
spect to ground under no-signal condi-
tions.
no mark : POWER ON
*: Impossible to measure
• Voltage are taken with a VOM (Input im-
pedance 10 MΩ).
Voltage variations may be noted due to
normal production tolerances.
• Signal path.
F: AUDIO
For printed wiring boards.
Note:
•X:parts extractedfrom the compo-
nent side.

XM-440EX/440NX
9
9
3-2. PRINTEDWIRING BOARDS
• Semiconductor Location
D101 A-6
D102 A-6
D201 A-4
D202 B-4
D301 C-6
D302 C-6
D401 C-4
D402 C-4
D501 D-8
D901 D-1
D902 D-1
D903 D-3
D904 D-2
D908 E-5
D909 E-5
D910 E-5
D911 F-5
D912 F-6
D913 F-6
D914 D-5
D915 D-5
D916 B-1
D917 B-2
D918 E-4
D919 E-4
D971 D-3
IC101 E-7
IC102 A-7
IC103 A-7
IC202 B-7
IC203 B-7
IC301 F-7
IC302 C-7
IC303 C-7
IC402 C-7
IC403 C-7
IC501 D-7
IC901 D-4
Q101 B-6
Q102 A-6
Q103 A-6
Q104 A-5
Q105 A-5
Q106 A-5
Q107 A-5
Q108 A-5
Q109 A-5
Q110 A-5
Q111 A-6
Q112 A-4
Q201 B-6
Q202 A-4
Ref. No. Location Ref. No. Location
Q203 A-4
Q204 A-3
Q205 A-3
Q206 A-3
Q207 A-3
Q208 A-3
Q209 A-3
Q210 A-3
Q211 B-3
Q212 B-2
Q301 C-6
Q302 C-6
Q303 C-6
Q304 C-5
Q305 C-5
Q306 C-5
Q307 C-5
Q308 C-5
Q309 C-5
Q310 C-5
Q311 C-5
Q312 C-4
Q401 D-6
Q402 C-4
Q403 C-4
Q404 C-3
Q405 C-3
Q406 C-3
Q407 C-3
Q408 C-3
Q409 C-3
Q410 C-3
Q411 D-3
Q412 C-2
Q901 E-2
Q902 D-2
Q903 D-1
Q904 E-2
Q905 E-2
Q906 D-2
Q907 D-2
Q908 D-2
Q915 F-4
Q916 E-4
Q917 E-3
Q918 F-3
Q919 F-6
Q920 F-6
Q921 D-6
Q922 D-5
Q923 B-2
Q924 B-2
Q925 B-2
MAIN BOARD
09
1
E
F
234567 8
A
B
C
D
11
1-677-700-
09
2
B
A
11-677-341- 11
R934
R928
R927
R931
R929
R933
R932
R980
R937
R936
R935
R942
Q911
Q913
Q914
Q910
Q909
D906 D907 D905
PN901
Q915
LED BOARD
E
E
E
EE
E
V+
GND
THR
CUR
OFF
E
FILTER
RV301
FILTER
RV101
R140
R147
C115
R240
R247
R239
R139
R236
R238
R237
C215
C931
R961
R964
R963
C932
R962
R965
R966
C940
C941
C933
C934
D916
D917
Q924
Q923 Q925
Q212
J166
J174 R233
R339
R439
R340
R347
C315 J173
J170
J171
R438
R437
J165
R433
R436
J156
R440
R447
J172
C415
Q412
J922
J924 J923
R940
R432
R967 R938
R905
R906
R904
D902
Q903
R902
R901
C903
Q902
D901
J620
R925
R926
C912 Q908
Q906
R923
J619
Q907
R924
R903
J909
J908
J910
J911
J912
C901
J621
R939
R930
D904
C911
R920
Q904
Q905
R921
R919
C909
EE
E
E
E
E
E
E
E
E
E
J901
J902
CN901
C913
J913
C914
R918
R972
R917
R915 R971
C910
R922
J622
D971
D903
R913
J623
C906
J916
J915
J914
J919
J918 J917
C915
C902
J144
F901
J904
J903
J907
J906
J905
C939
L901
E
Q901
Q918
S
Q917
S
PL901
C916
R951
TH901
J926
R916
J921
J920
R946
R947
Q916
E
R948
R945
R943
Q926
E
T901
R941
R973
R944
D908
D919
D918
D909
R927
D913
J930 J929
D912
J931
D911
D910 J933
J932
R949
R950
C922
C921
Q920
E
Q919
J934
C926
C925
C923
C924
C904 C905 C907
R910
R908
C908
R914
J624
C920
C919
J625
18
16 9
J928
IC901
PH901
R954 R953
R955
R952
J629
R956
C930
D915
D914
Q922
E
J948
Q921
E
C917
J938
J955
C918
J936
R354
C311
J118
R353
R453
Q301
E
Q401
E
J148
J155
J154
R334
R335
R324
R326 R325
R319
R318
D302
R320
R321
R322
Q302
E
Q303
E
R317
D301
C313
R323
J927
J937
R330
Q307
E
C312
R329
R328
R327
J956
J965
R331
R332
J147
J954
R336 R337
Q312
E
J645
R338
J945
J925
J150
J149
J168 J941
J152
J159 J158 J177
J960
J950
J953
J947
J946
E
Q306
E
E
Q304
BJ102 BJ103
E
Q305
Q309
Q308
Q310
Q311
E
R124
R126
R125
R119
R118
D102
E
R120
R121
R122
D101
E
C114
Q107
E
C112
R129
R128
R127
R132
J146
Q112
E
J951
E
E
Q106
E
Q104
R133
E
Q105
Q109 Q108
E
Q110
Q111
R138
R137 R136
J949
R131
J145
R123
R154 R153
J944
C111
R253
Q101
E
Q201
E
R134
Q102
E
Q103
E
R117
C113 R135
J943
R130
C314
J942
R454
C411
R434
D402
R435
Q403
E
Q402
E
R417
R419
R418
R422
R420
R421
C413
R423
R424
R426 R425
R430 J646
J163
J153
R431
D401
C412
E
Q404
E
Q405
Q408
E
C414
Q409
E
Q407
E
R429
R428
R427
Q406
E
J160
J169
J940
Q410
Q411
J666
J665
J167
J164
J952
TH902 TH903
R232
R254
C211 R234
D202
R235
Q203
E
Q202
E
R217
R219
R218
R222
R220
R221
C213
R223
R224
R226 R225
R230 J626
J162
J157
R231
D201
C212
E
Q204
E
Q205
E
C214
Q207
E
R229
R228
R227
Q206 Q208
E
J176
J161
Q210
Q211
J964
J611
R108
R107
C105 C152
R105
R109
R106
R110
R111
R151
R211
R212
R112
J615
R213
R208
J610 R210
R209
J612
J616
C106 C108 C109
J143
J142
J141
J139
J138
C151
C209
C206 C207
C107
IC102 IC103
IC202 IC203
R113
J136
J137
J614
J613
J135
J133
J130
J131
J134
C208
C251
R152
R252
R251
C252
R207
C205
R205 R206
R214
R114
C309
C210
C110 R311
R310
C308
J132
J607
R308
J128
IC302 IC303
R411 R412
R312
J609
R351
R413
J127
C306
C307
R313
J605
R352 R314
R452
J604
-2 -4-3 -1
RV301
-2 -4-3 -1
RV101
S101
RV102
RV302
S501
CN301
CN303
R504 R503
C452 C352
C351 C409
J608
J126
J125
C408
R410
J601
J124
C406
R307
C305
R305
R309
R306
J606
J600
J122
J121
J123
J120
J618
R408
IC402 IC403
R405 R409
R407
C405
J116
J117
J119
C451
R451
R406
R414
C310
C501
C502
R501
R502
R505
C407
J115
C410
R512
J602
J114
C504
R507
R508
R510
R509
R506
IC501
J603
C505
D501
C219
C220
C120
R511
C119
C503
BJ101
R242 R243
R241
R201
C217 C218
R204
C204
C118 C117
J111
C203
R203
J664
C103
R103 R141
R143
R101
R102
C104
R104
R142
J630
R202
J105
IC101
C202
C201
C101
C102
C116
R957
C935
R958
C936
J112
J106
C401
C402
C301
C302
C416
C937
R959
R401
R404
C404
C928
C929 IC301
R443
C403
R441
J665
J107
R960
C938
J108
J109
J632
C304
R304
R342
R402
R442
R403
C303
R341
R302
R343
C418 C417
R301
R303
C319
C318 C317
C419
C420
C320
R444
R344
J104
J103
J101
J102
R144
R244
J113
C316
C216
R912 R911
R907
R909
FILTER
LPF
RV102
S101
LEVEL
OFF
HPF
FILTER
FRONT
FILTER
LPF
S301
LEVEL
RV302
TEST TONE
S501
OFF
HPF
FILTER
REAR
L
R
HIGH
LEVEL
INPUT
CN303
L
R
HIGH
LEVEL
INPUT
L
R
INPUT
FRONT
REAR
L
R
INPUT
CN302
E
E
E
E
E
E
E
E
E
R
L
L+R
MONO
FRONT
SPEAKER OUT
CN903
CN904
MONO
REAR
SPEAKER OUT
GND
+12V
REMOTE
CN901
CN902
R
L
L+R
F901
30A
E
Q209
E
E
R333
5
8
4
1
5
8
4
1
5
8
4
1
5
8
4
1
5
8
4
1
5
8
4
1
5
8
4
1
5
8
4
1
5
8
4
1
5
8
4
1
5
8
4
1
-2 -1
S301
-2 -1
(MONO) (MONO)
OFF SET
OVER
THER
GND
+V

10
XM-440EX/440NX
10
3-3. SCHEMATIC DIAGRAMS – MAIN (1/2) SECTION –
• See page 8 forWaveforms.
• See page 9 for PrintedWiring Boards.
12