Sony XM-N502 Service Manual page 9

4-2. SCHEMATIC DIAGRAM - MAIN Board (2/2) -
1 2 3
MAIN BOARD (2/2)
A
B
1
2
1
3
4
MAIN
BOARD
5
(1/2)
6
7
C
CAM006
R932
2.2k
(CHASSIS)
TP12
C902
0.1
TP18
D
C903
1000p
R902
R903 10k
10k
D904
DZ2J160M0L
0.1
E
0.8
Q901
0.8
RT1N141C-TP-1
OVER VOLTAGE DETECT
0.1
Q903
2SC3052EF-T1-LEF
C906
0.1
F
R940 C907 R943
100k 100 47k
16V
IC B/D
IC901
DC/DC CONVERTER
G
R914 IC901
6.8k TL594CD-R2
0.5
2IN+
1 1IN+
R942
10k
2.5
2IN–
2 1IN–
C909
0.01
0
REF
3
FEEDBACK
0.3
OUTPUT
4
C908 CTRL
DTC
1000p
H 1.6
VCC
5
CT
3.8
C2
6
RT
R913
22k
E2
7
GND
14.3
E1
C905 8
C1
100
16V
I 1
C910
1000p
Q905, 906
0.1 PROTECT DETECT
14.2
Q906
RT1N141C-TP-1
J
LED DRIVER
0
2
D918
Q904
SML1216WTP4
RT1N141C-TP-1
POWER/
PROTECTOR
K
(GRN): POWER ON
(RED): PROTECTOR ON
(RED)
(GRN)
L
XM-N502
• See page 7 for Waveforms. • See page 7 for IC Block Diagram.
4 5 6 7
C913 C904
1 1
R901 C912 C921
10k 0.1 0.1
R912
10k
(E, IND)
R904
1k
R905
14.3
270
Q902, 903 13.7
B+ SWITCH
Q902
R906 R908 KTA1281Y-AT
14.3
2.2k 1.5k
R933
10k
14.3
R939
10k
13.7
D906 Q309
DA2J10100L ISA1235AC1-T112-1EF
14.3
DC OFF DETECT
R941
10k
D905
DA2J10100L
0
16
R141
2.5
2.2k
15
5
14
R136
2.2k
5
13
C211
14.3
C136 47
12
0.1 16V
14.3
11
5.7
10
5.7
9
Q905
RT1P441C-TP-1
R915
4.7k
0.1 14.3
R919 R921
1k 1k
C911
14.2
R916 1
4.7k
R920 R923
1k 1k
R907
470
R918
1k
R931
C318
47k
0.01
8 9 10 11
L901
80uH
R118 R121 R138 D101 R122
33k 1.5k 1.5k DA2J10100L 100
29.5
Q104
C112 ISA1284AS1-T112-E
47p
DRIVE AMP
C113 R124
29.5 29.4
22p 47k
0.2
-1 -2
Q103
2SC4207(T5RSONY,F)
-0.3
DIFFERENTIAL AMP
R125
0.7
47k
0.2
-1 -2
Q102
2SA1618-YGRTE85R
-29.1
Q105
DIFFERENTIAL AMP
ISC3244AS1-T112-E
-29.1 DRIVE AMP
-29.1
R120 R137 R119 R123
D102
1.5k 1.5k 33k 100
DA2J10100L
C111
47
R116 R117
16V
1.5k 10k
R218 R221 R238 D201 R222
33k 1.5k 1.5k DA2J10100L 100
29.5
Q204
C212 ISA1284AS1-T112-E
47p
DRIVE AMP
C213 R224
29.5 29.4
22p 47k
0.1 0.1
-1 -2
Q203
2SC4207(T5RSONY,F)
-0.4
DIFFERENTIAL AMP
R225
0.7
47k
0.1 0.1
-1 -2
Q202
2SA1618-YGRTE85R
-29.1
DIFFERENTIAL AMP
-29.1
-29.1
Q205
ISC3244AS1-T112-E
DRIVE AMP
R220 R237 R219 R223
D202
1.5k 1.5k 33k 100
DA2J10100L
R216 R217
2.2k 10k
14.3 2
R925 R927
22 2.2
5.6
T901
Q911
5.6 DC/DC CONVERTER
FKV550N S
TRANSFORMER
R922
5.4 SWITCHING
1k Q908
DRIVER
C914
RTAN140C-T112-1
1 4
0.1
DRIVER
TP7 TP8
2 5
C915
5.4 3 6
R924 Q909 Q910 2200
1k RTAN140C-T112-1 FKV550N 16V
DRIVER SWITCHING S
5.6 DRIVER
2
R926 R928 5.6
22 2.2
14.3
9 9
12 13 14 15
Q110
2SC5100-P
30 30
POWER AMP
1.3
0.7
R128 Q108
22k KTC1027-Y-AT/P
1.3 1.2 0.7
DRIVE AMP
0.6
R130
R126 Q107
2.2
680 ISA1235AC1-T112-1EF
-0.8
0.6 BIAS
-0.3
Q106 R132
R127 2SC3052F-T1-LF C114 R129 0.1
-0.8
220 0.1 220 5W
BIAS
R131
2.2
-0.8
-0.3
-0.8 -0.3
-29.6
Q109 Q111
KTA1023-Y-AT/P 2SA1908-P
-30.3
DRIVE AMP POWER AMP
Q210
2SC5100-P
30 30
POWER AMP
1.3
0.7
R228 Q208
22k KTC1027-Y-AT/P
1.3 1.2 0.7
DRIVE AMP
0.6
R230
R226 Q207
2.2
680 ISA1235AC1-T112-1EF
-0.9
0.6 BIAS
-0.3
Q206 R232
R227 2SC3052F-T1-LF C224 R229 0.1
-0.9
220 0.1 220 5W
BIAS
R231
2.2
-0.9
-0.3
-0.9 -0.3
-29.6
Q209 Q211
KTA1023-Y-AT/P 2SA1908-P
-30.3
DRIVE AMP POWER AMP
Q313 R323 Q315 R325
KTC3198GR-A 10 KTC3198GR-A 10
+13V REGULATOR +13V REGULATOR
30 13.2 30 13.2
R320
13.8 13.8
3.3k
C305 C307 C312
560 0.01 0.1 UDZSUSTE-1713B
50V
C306 C308 C313
560 0.01 0.1 UDZSUSTE-1715B
50V
R321
3.3k -14.9 -14.9
-30.3 -14.3 -30.3 -14.3
Q314 Q316
KTA1266GR-AT R322 KTA1266GR-AT R324
10 10
-15V REGULATOR -15V REGULATOR
R318
1k
Q307, 308
ZERO LEVEL DETECT
Note: When replacing the Q110, Q111, Q210 and Q211 on the MAIN board, refer
to "NOTE FOR REPLACEMENT OF THE TRANSISTORS" on page 2.
XM-N502
16 17 18 19
GND
TP16
+12V
TP17
REM
F901
25A
32V
TP21
+
TP22 L
30
R133
–
10k
SPEAKER
BTL
Q112 TP19 OUT
2SC3052EF-T1-LEF
0.2 13.9
+
OVER LOAD DETECT
R
TP20
0.2 –
R139
R140
15k
10k
0.2
0.2
C115
0.047
-30.3
R134
2.2
R135
100k
30
R233
10k
Q212
2SC3052EF-T1-LEF
0.2 13.9
OVER LOAD DETECT
R239 0.2
R240
15k
10k
0.2
R235
100k
0.2
C215
0.047
-30.3
R234
2.2
TP10
C311
0.01
TP14
Q317 R327
KTC3198GR-A 10
+13V REGULATOR
30 13.2
13.8
D305 C920
100
16V
TP9
CAM001
D306 C919
100
(CHASSIS)
16V
CAM002
-14.9
(CHASSIS)
CAM003
-30.3 -14.3
Q318
(CHASSIS)
KTA1266GR-AT R326
CAM004
10
-15V REGULATOR
TP15
(CHASSIS)
CAM005
TP11
(CHASSIS)
Q307
2SC3052EF-T1-LEF
14.2
0.1
Q308
2SC3052EF-T1-LEF
14.2 0.1
C317 R319
100 100k
16V
CN903