NAD T977 C/AH, Руководство по обслуживанию, Страница: 11 / 37

PROT4
PROT6
SCLED
+5VD
PROT3
+12VD
PROT2 PROT3 PROT4 PROT1 PROT5 PROT6
PROT7
+5VD
PROT7
+5VD
SCLED
+12VD
+12VD
DGND
DGND
STBYLED
STBYLED
AMBER
BLUE
PROT5
PROT1
PROT2
POWER
POWER
/1/2W
CH2 LED CH3 LED CH4 LED CH5 LED CH6 LED CH7 LED CH1 LED
All Polyester capacitors are 63V unless noted.
All Elec. capacitors are 50V unless noted.
All Resistor are 1/6W unless noted.
SOFT
CL
IPP
ING
LED
/16V
STBYLED is +0.7V at normal working condition and is +5V at STNADBY mode.
PROT1-PROT7 each is +10.5V at normal working condition.When any
channel is in protection,the relevant PROT will be at -10.5V.
SCLED is floating at normal working condition,when Softclipping mode,
SCLED be connect to GND.
LED Pin1 Red Pin3 Amber Pin4 Blue
R309
330
R309
330
R305
510
R305
510
Q304
2SA1015
Q304
2SA1015
R303
510
R303
510
R342
10K
R342
10K
R311
330
R311
330
Q320
2SC1815
Q320
2SC1815
Q301
2SA1015
Q301
2SA1015
R315
10K
R315
10K
R318
10K
R318
10K
R322
10K
R322
10K
R314
330
R314
330
R349
10K
R349
10K
D305
BL-BUBB4274
D305
BL-BUBB4274
D302
BL-BUBB4274
D302
BL-BUBB4274
R302
510
R302
510
Q333
2SC1815
Q333
2SC1815
R327
10K
R327
10K
R339
10K
R339
10K
D307
BL-BUBB4274
D307
BL-BUBB4274
R333
10K
R333
10K
Q315
2SC1815
Q315
2SC1815
R343
330
R343
330
Q314
2SC1815
Q314
2SC1815
D312
11V
D312
11V
R338
10K
R338
10K
Q316
2SC1815
Q316
2SC1815
P301B
FLEX CONNECTOR DIP16
P301B
FLEX CONNECTOR DIP16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Q306
2SA1015
Q306
2SA1015
Q325
2SA1015
Q325
2SA1015
+
C301
47uF
+
C301
47uF
Q319
2SC1815
Q319
2SC1815
R330
10K
R330
10K
R340
10K
R340
10K
Q313
2SC1815
Q313
2SC1815
Q323
2SA1015
Q323
2SA1015
R307
510
R307
510
R334
10K
R334
10K
R329
10K
R329
10K
D304
BL-BUBB4274
D304
BL-BUBB4274
Q318
2SC1815
Q318
2SC1815
Q311
2SC1815
Q311
2SC1815
Q317
2SC1815
Q317
2SC1815
Q310
2SC1815
Q310
2SC1815
Q328
2SA1015
Q328
2SA1015
R321
10K
R321
10K
Q322
2SA1015
Q322
2SA1015
Q307
2SA1015
Q307
2SA1015
R325
10K
R325
10K
Q334
PXT2222A
Q334
PXT2222A
D301
BL-BUBB4274
D301
BL-BUBB4274
D306
BL-BUBB4274
D306
BL-BUBB4274
D303
BL-BUBB4274
D303
BL-BUBB4274
D309
BL-BUBB4274
D309
BL-BUBB4274
R308
330
R308
330
R310
330
R310
330
Q326
2SA1015
Q326
2SA1015
Q327
2SA1015
Q327
2SA1015
R336
10K
R336
10K
Q303
2SA1015
Q303
2SA1015
R324
10K
R324
10K
R332
10K
R332
10K
R337
10K
R337
10K
Q308
2SC1815
Q308
2SC1815
R301
510
R301
510
R319
10K
R319
10K
R341
10K
R341
10K
R350
360
R350
360
Q305
2SA1015
Q305
2SA1015
R313
330
R313
330
R344
470
R344
470
R326
10K
R326
10K
Q309
2SC1815
Q309
2SC1815
R335
10K
R335
10K
Q302
2SA1015
Q302
2SA1015
S301
IT-1102D-1160
S301
IT-1102D-1160
1
2
3
4
R323
10K
R323
10K
D308
Tri LED
D308
Tri LED
2
1
3
4
Q321
2SC1815
Q321
2SC1815
R317
10K
R317
10K
R306
510
R306
510
Q312
2SC1815
Q312
2SC1815
Q324
2SA1015
Q324
2SA1015
Q329
DTA114EKA
Q329
DTA114EKA
R312
330
R312
330
R320
10K
R320
10K
R304
510
R304
510
R331
10K
R331
10K
R316
10K
R316
10K
R328
10K
R328
10K
- 11 -
SCHEMATICS DIAGRAM