Read Sony XM-GTX1821 Service Manual online
XM-GTX1821
XM-GTX1821
10
10
4-2. SCHEMATIC DIAGRAM
• See page 8 for waveforms. • See page 8 for IC Block Diagram.
Note: When replacing the Q113, Q114, Q116, Q117, Q119, Q120, Q213,
Q214, Q216, Q217, Q219 and Q220 on the MAIN board, refer to
“NOTE FOR REPLACEMENT OF THE TRANSISTORS” (page 2).
“NOTE FOR REPLACEMENT OF THE TRANSISTORS” (page 2).
IC B/D
2
1
1
0.5
40
0
11.4
0
0
0
-40
-0.5
0
-0.5
-40
0.5
40
0
11.4
0
0
11.4
0
0
0.5
40
0
0.5
40
0
1.1
-1.1
0.5
40
0.5
0
40
0
0.5
11.4
0
0
11.4
0
0
11.4
0
0
0
0
-0.5
-0.5
-40
-40
0
-40
-0.5
-0.5
-1.1
-40
0.5
1.1
-1.1
0.5
-0.5
-1.1
40
1.1
0.5
-0.5
-1.1
-40
-0.5
-1.1
0.5
-0.5
0
-40
0.5
40
1.1
1.1
39.6
40
1.1
39.6
40
-39.5
-1.1
-39.5
-1.1
-39
-39
39.6
-0.5
39.6
0
0.5
0
-39
-39
0.5
0
0
-39
-39
39.6
0
-0.5
39.6
0
14.7
14.7
-15.9
-15.9
-15.7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-15.7
0
0
0.3
1.5
3.8
14.4
0
0
4.9
14.4
14.4
4.9
5
5
0
0
0.7
0
0
0
14.7
0.9
0
7
4
14.4
14.4
14.4
0
0
0.7
0
5.3
5.3
5.3
5.3
-0.7
14.7
0.7
0
-15.5
14.5
14.6
0
0.7
0
13.6
14.4
4
14.5
0
0.7
14.4
13.7
0
2.1
13.7
0
1.9
4.9
4.9
14.4
14.4
5.5
14.7
0
14.7
13.7
0.7
0
5.5
0.5
5.3
14.4
14.4
0.5
5.3
14.4
14.4
13.7
13.7
0
0
-15.9
-16.6
-40
40
-85.5
14.7
-6.4
1.9
15.4
47p
C103
47p
C104
47p
C105
47p
C107
47p
C111
33p
C112
47p
C203
47p
C204
47p
C205
47p
C207
47p
C211
33p
C212
1000p
C317
1000p
C322
1000p
C905
1000p
C912
1
C913
FCH10A15
D302
FRH10A15
D303
(GRN)
(RED)
SML1216WTP4
D904
2SA1618-YGRTE85R
Q103
2SC4207(T5RSONY,F)
Q104
KTA1268-Y-AT/P
Q107
2SC3421-Y
Q111
2SA1358-Y
Q112
2SA1618-YGRTE85R
Q203
2SC4207(T5RSONY,F)
Q204
KTA1268-Y-AT/P
Q207
2SC3421-Y
Q211
2SA1358-Y
Q212
2SC3421-Y
Q307
2SA1358-Y
Q308
22k
R103
22k
R104
10k
R115
2.2k
R126
100
R127
22k
R128
22k
R129
100
R130
470
R132
10k
R134
220
R135
2.2
R136
2.2
R137
0.1
R138
2.2
R139
2.2
R140
0.1
R141
2.2
R142
2.2
R143
0.1
R144
10k
R145
2.2
R146
47k
R147
10k
R154
10k
R155
22k
R203
22k
R204
100
R227
22k
R228
22k
R229
100
R230
470
R232
10k
R234
220
R235
2.2
R236
2.2
R237
0.1
R238
2.2
R239
2.2
R240
0.1
R241
2.2
R242
2.2
R243
0.1
R244
10k
R245
2.2
R246
47k
R247
10k
R255
1k
R301
2.2k
R302
22k
R305
2.2k
R306
100k
R318
3.3k
R320
3.3k
R321
1k
R322
2.2
R323
2.2
R324
2.2
R327
2.2
R328
3.3k
R329
3.3k
R330
2.2k
R332
100k
R333
2.2k
R901
10k
R903
10k
R904
2.2k
R907
10k
R908
22k
R909
22k
R910
10k
R912
100k
R913
10k
R914
22k
R915
1k
R916
4.7k
R917
220
R918
2.2k
R919
22
R923
22
R926
10k
R938
0.47
C901
+
-
NJM4565M(TE2)
IC301
3
2
1
+
-
NJM4565M(TE2)
IC301
5
6
7
+
-
NJM4565M(TE2)
IC302
3
2
1
NJM4565M(TE2)
IC301
8
POWER
4
GND
NJM4565M(TE2)
IC302
8
POWER
4
GND
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
TL594INSR
IC902
15uH
L901
3
2
1
4
2SC3326N-TE85L-B
Q101
2SC3326N-TE85L-B
Q201
2SC3326N-TE85L-B
Q907
2SC3326N-TE85L-B
Q908
10k
RV301
50V
560
C311
50V
560
C312
1k
R905
J901
1000p
C909
10k
R902
TP1
TP2
TP3
TP5
TP6
TP7
TP13
TP14
TP15
TP16
TP17
TP18
TP19
TP20
TP9
TP10
TP11
TP12
TP23
TP24
R337
470k
R338
100k
63V
220
C313
63V
220
C314
TP25
TP26
39k
R325
R319
22k
270
R112
270
R212
270
R906
1.5k
R124
1.5k
R221
1.5k
R121
1.5k
R231
1.5k
R222
1.5k
R131
1.5k
R122
1.5k
R937
1.5k
R223
1.5k
R123
1.5k
R224
6.8k
R326
6.8k
R911
12k
R211
12k
R111
15k
R105
15k
R208
15k
R205
15k
R108
68k
R220
68k
R120
68k
R225
68k
R125
150k
R934
150k
R331
15k
R148
15k
R150
15k
R152
15k
R252
15k
R250
15k
R248
10k
R249
10k
R251
10k
R253
10k
R153
10k
R151
10k
R149
2SC2713G-TE85L
Q115
2SC2713G-TE85L
Q118
2SC2713G-TE85L
Q121
2SC2713G-TE85L
Q221
2SC2713G-TE85L
Q218
2SC2713G-TE85L
Q215
RT1N141C-TP-1
Q902
RT1N141C-TP-1
Q905
RT1N141C-TP-1
Q906
RT1N441C-TP-1
Q915
RT1P441C-TP-1
Q904
MC2837
D310
MC2837
D311
MC2838-T112-1
D313
MC2838-T112-1
D312
2SC3052EF-T1-LEF
Q310
2SC3052EF-T1-LEF
Q309
2SC3052EF-T1-LEF
Q903
2SC3052EF-T1-LEF
Q311
ISA1235AC1-T112-1EF
Q110
ISA1235AC1-T112-1EF
Q210
ISA1235AC1-T112-1EF
Q916
2SA1908
Q120
2SA1908
Q214
2SA1908
Q217
2SA1908
Q220
2SC5100
Q113
2SC5100
Q116
2SC5100
Q119
2SC5100
Q213
2SC5100
Q216
2SC5100
Q219
2SA1908
Q114
2SA1908
Q117
10k
R133
10k
R233
DZ2J160M0L
D902
DZ2J160M0L
D305
DZ2J150M0L
D304
DA2J10100L
D101
DA2J10100L
D102
DA2J10100L
D201
DA2J10100L
D202
DA2J10100L
D903
DZ2J330M0L
D307
S
FKV575
Q910
S
FKV575
Q912
S
FKV575
Q909
S
FKV575
Q911
2SB1132-T100-R
Q901
2SC3052F-T1-LF
Q109
2SC3052F-T1-LF
Q209
MC2836-T112-1
D306
KTC3200GR-AT
Q108
KTC3200GR-AT
Q208
4.7k
R109
4.7k
R209
0.47
C305
0.47
C306
10k
R303
10k
R317
4.7k
R300
10k
R254
MC2838-T112-1
D301
TP21
TP22
DA2J10100L
D300
MC2836-T112-1
D315
RT1N441C-TP-1
Q302
82k
R339
10k
R336
+
-
NJM4565M(TE2)
IC302
5
6
7
DA2J10100L
D308
RT1P141C-TP-1
Q301
10M
R334
DA2J10100L
D314
DZ2J068M0L
D309
2.2
R928
2.2
R929
2.2
R930
2.2
R931
4.7k
R316
470
R116
2SC3326N-TE85L-B
Q102
TH301
TH302
TH303
2SC3326N-TE85L-B
Q306
2SC3052EF-T1-LEF
Q305
100k
R315
2SC3052EF-T1-LEF
Q303
0.1
C309
0.1
C915
0.1
C304
0.1
C217
0.1
C910
0.1
C301
0.1
C318
0.1
C117
0.1
C907
0.1
C911
0.1
C319
0.1
C113
0.1
C914
0.1
C320
0.1
C902
0.1
C213
0.1
C303
0.1
C321
10k
R304
16V
2200
C917
16V
2200
C916
680
R119
330
R216
390
R219
1.5k
R226
2.2k
R312
3.3k
R314
1.8k
R313
3.3k
R311
2SC3052F-T1-LF
Q313
DZ2J056M0L
D316
0.1
C316
0.1
C215
0.1
C327
0.1
C115
0.1
C331
0.1
C328
0.1
C315
0.1
C325
0.1
C214
0.1
C114
0.1
C330
0.1
C307
0.1
C324
16V
100
C210
16V
100
C906
16V
100
C908
16V
100
C110
16V
220
C302
50V
22
C106
50V
22
C206
50V
22
C109
50V
22
C310
50V
22
C308
16V
220
C323
2SC3326N-TE85L-B
Q202
2SC3052EF-T1-LEF
Q304
RT1P441C-TP-1
Q312
2.2k
R118
2.2k
R218
10k
R117
10k
R217
S301
KTC4373
Q917
KTC4373
Q918
2.2k
R307
5.6k
R308
5.6k
R309
2.2k
R922
2.2k
R924
2.2k
R925
2.2k
R927
1k
R921
1k
R920
T901
5
2
1
3
4
8
7
6
R110
22k
R210 22k
(3/3)
IC301
IC301
(1/3)
(1/3)
IC302
IC302
(3/3)
(2/3)
IC902
TRANSFORMER
MAIN BOARD
(BTL)
L
R
INPUT
PRE AMP
PRE AMP
(80Hz)
LPF
ON
OFF
-1
-2
GAIN CONTROL AMP
GAIN CONTROL AMP
SWITCH
MUTING
-1
-2
LEVEL
LOW-PASS FILTER
THERMAL DETECT
SWITCH
MUTING SWITCH
Q305, 312
DC OFF DETECT
PROTECT SWITCH
Q301, 303
OVER VOLTAGE DETECT
B+ SWITCH
Q901, 903
(CHASSIS)
DC/DC CONVERTER
DC/DC CONVERTER
LED DRIVER
DC OFF DETECT
Q904, 905
PROTECT DETECT
POWER/
(RED): PROTECTOR ON
(GRN): POWER ON
PROTECTOR
DC DETECT
1IN+
2IN-
C2
E1
REF
VCC
2IN+
E2
OUTPUT
CTRL
C1
GND
RT
CT
DTC
FEEDBACK
1IN-
BUFFER
BUFFER
DRIVER
DRIVER
SWITCHING
SWITCHING
SWITCHING
SWITCHING
DRIVER
DC DETECT
+15V REGULATOR
-15V REGULATOR
Q309, 310
ZERO LEVEL DETECT
DIFFERENTIAL AMP
DIFFERENTIAL AMP
DRIVE AMP
DRIVE AMP
DRIVE AMP
DRIVE AMP
DIFFERENTIAL
DIFFERENTIAL AMP
-2
-1
-2
-1
-2
-1
-2
-1
(2/3)
MUTING
DRIVE AMP
BIAS
BIAS
DRIVE AMP
DRIVE AMP
BIAS
BIAS
DRIVE AMP
POWER AMP
POWER AMP
POWER AMP
5W
5W
5W
5W
5W
5W
POWER AMP
POWER AMP
POWER AMP
POWER AMP
OVER LOAD DETECT
OVER LOAD DETECT
OVER LOAD DETECT
POWER AMP
POWER AMP
POWER AMP
POWER AMP
POWER AMP
OVER LOAD DETECT
OVER LOAD DETECT
OVER LOAD DETECT
+
–
+
–
OUT
SPEAKER
F901
F902
30A
30A
30A
REM
+12V
GND
TB901
16
N
8
I
14
2
15
12
A
D
5
K
B
M
7
C
L
17
21
6
11
3
H
F
13
20
G
9
E
10
1
19
J
18
4
22
(CHASSIS)
CAM002
CAM001
THERMAL
DETECT
DRIVER
DRIVER
DRIVER
32V
30A
32V
R
BTL
L
AMP
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