NAD T955 AH, Service Manual

Page: 9 / 38

SC
LED3
DGND
LED2
SC
+5VD
STBYLED
LED1
LED5
LED4
+5V
+5V
LED1
DGND
+5VD
DGND
LED2 +5V LED3 +5V LED4 +5V LED5 +5V
STBYLED
+5V
DGND DGND DGND STBYLED
DGND
STBYLED
GREEN
+5VD
All Polyester capacitors are 63V unless noted.
All Elec. capacitors are 50V unless noted.
All Resistor are 1/6W RJ13 unless noted.
e c e b
2SC1815
SC-43 SC-43
2N4401
2N4403
c b
GN
D
IN
SC-72
DTA114ESA
DTC114ESA
OU
T
R G
L57EGW
FROM POWER
SUPPLY BOARD
POWER LED BOARD
/16V /16V /16V /16V
Optional
R313
150
R313
150
Q304
DTC114ESA
Q304
DTC114ESA
R327
1K
R327
1K
D701
BL-BJLB4204
D701
BL-BJLB4204
C
G
R
Q307
2SA1015
Q307
2SA1015
D301
BL-BUBB4274
D301
BL-BUBB4274
Q311
2SA1015
Q311
2SA1015
Q316
DTC114ESA
Q316
DTC114ESA
R304
150
R304
150
R323
1K
R323
1K
R307
150
R307
150
P302A
9PIN2.54-A240B
P302A
9PIN2.54-A240B
2
3
4
1
5
6
7
8
9
+
C304
33uF
+
C304
33uF
Q314
2N4401
Q314
2N4401
R311
150
R311
150
D308
1N4148
D308
1N4148
Q303
2SA1015
Q303
2SA1015
+
C303
33uF
+
C303
33uF
D306
BL-BUBB4274
D306
BL-BUBB4274
R326
1K
R326
1K
D302
BL-BUBB4274
D302
BL-BUBB4274
R317
150
R317
150
D305
BL-BUBB4274
D305
BL-BUBB4274
R324
1K
R324
1K
Q306
DTC114ESA
Q306
DTC114ESA
R319
1K
R319
1K
R314
150
R314
150
Q302
DTC114ESA
Q302
DTC114ESA
+
C302
33uF
+
C302
33uF
Q305
2SA1015
Q305
2SA1015
P701A
3P2.54-C
P701A
3P2.54-C
1
2
3
D303
BL-BUBB4274
D303
BL-BUBB4274
Q312
DTC114ESA
Q312
DTC114ESA
Q309
2SA1015
Q309
2SA1015
Q315
2N4403
Q315
2N4403
+
C301
100uF
+
C301
100uF
R308
150
R308
150
R306
1K
R306
1K
R303
1K
R303
1K
D304
BL-BUBB4274
D304
BL-BUBB4274
Q308
DTC114ESA
Q308
DTC114ESA
Q310
DTC114ESA
Q310
DTC114ESA
P301A
3PIN2.54-A130B
P301A
3PIN2.54-A130B
2
3
1
R328
1K
R328
1K
Q313
2SC1815
Q313
2SC1815
R310
150
R310
150
R316
150
R316
150
R309
1K
R309
1K
R312
1K
R312
1K
R325
1K
R325
1K
R305
150
R305
150
R315
1K
R315
1K
R302
150
R302
150
Q301
2SC1815
Q301
2SC1815
R322
2.2K
R322
2.2K
R301
10K
R301
10K
R321
2.2K
R321
2.2K
R318
1K
R318
1K
- 9 -
SCHEMATICS DIAGRAM