NAD T 975 C/AH, Руководство по обслуживанию, Страница: 11 / 40

PROT1
+12VD
S
C
LE
D
STBYLED
+12VD
P
R
O
T2
P
R
O
T3
P
R
O
T4
P
R
O
T1
P
R
O
T5
P
R
O
T6
P
R
O
T7
PROT3
PROT2
PROT4
+5VD
PROT6
PROT5
SCLED
PROT7
DGND
STBYLED
GREEN
STBYLED
+5VD
/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.
SO
FT
C
LI
PPI
N
G
L
ED
/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.
STANDBY LED
POWER LED BOARD
Q301
2SA1015
Q301
2SA1015
Q320
2SC1815
Q320
2SC1815
R311
330
R311
330
R342
10K
R342
10K
R303
510
R303
510
Q304
2SA1015
Q304
2SA1015
R305
510
R305
510
R309
330
R309
330
R314
330
R314
330
R322
10K
R322
10K
R318
10K
R318
10K
R315
10K
R315
10K
Q333
2SC1815
Q333
2SC1815
R302
510
R302
510
D302
BL-BUBB4274
D302
BL-BUBB4274
D305
BL-BUBB4274
D305
BL-BUBB4274
D
70
1
B
L-
B
JL
B
42
74
D
70
1
B
L-
B
JL
B
42
74
R349
10K
R349
10K
D312
11V
D312
11V
Q331
2SC1815
Q331
2SC1815
Q314
2SC1815
Q314
2SC1815
R343
56
R343
56
Q315
2SC1815
Q315
2SC1815
R348
1K
R348
1K
R333
10K
R333
10K
D307
BL-BUBB4274
D307
BL-BUBB4274
R347
10K
R347
10K
R339
10K
R339
10K
R346
10K
R346
10K
R327
10K
R327
10K
Q325
2SA1015
Q325
2SA1015
Q306
2SA1015
Q306
2SA1015
Q316
2SC1815
Q316
2SC1815
R338
10K
R338
10K
Q319
2SC1815
Q319
2SC1815
+
C301
47uF
+
C301
47uF
Q313
2SC1815
Q313
2SC1815
R340
10K
R340
10K
R345
10K
R345
10K
R330
10K
R330
10K
Q318
2SC1815
Q318
2SC1815
P302A
3PIN2.54-A130B
P302A
3PIN2.54-A130B
2
3
1
D304
BL-BUBB4274
D304
BL-BUBB4274
R329
10K
R329
10K
R334
10K
R334
10K
R307
510
R307
510
Q323
2SA1015
Q323
2SA1015
D303
BL-BUBB4274
D303
BL-BUBB4274
D306
BL-BUBB4274
D306
BL-BUBB4274
D301
BL-BUBB4274
D301
BL-BUBB4274
Q334
2SD667
Q334
2SD667
R325
10K
R325
10K
Q307
2SA1015
Q307
2SA1015
Q322
2SA1015
Q322
2SA1015
R321
10K
R321
10K
Q328
2SA1015
Q328
2SA1015
Q310
2SC1815
Q310
2SC1815
Q317
2SC1815
Q317
2SC1815
Q311
2SC1815
Q311
2SC1815
P701A
3PIN2.54-C
P701A
3PIN2.54-C
1
2
3
Q326
2SA1015
Q326
2SA1015
R310
330
R310
330
R308
330
R308
330
D
30
9
B
L-
B
U
B
B
42
74
D
30
9
B
L-
B
U
B
B
42
74
R332
10K
R332
10K
R324
10K
R324
10K
Q303
2SA1015
Q303
2SA1015
R336
10K
R336
10K
Q327
2SA1015
Q327
2SA1015
Q309
2SC1815
Q309
2SC1815
R326
10K
R326
10K
R344
120
R344
120
R313
330
R313
330
Q305
2SA1015
Q305
2SA1015
R350
360
R350
360
R341
10K
R341
10K
R319
10K
R319
10K
R301
510
R301
510
Q308
2SC1815
Q308
2SC1815
R337
10K
R337
10K
Q329
2SA1015
Q329
2SA1015
R317
10K
R317
10K
Q321
2SC1815
Q321
2SC1815
R323
10K
R323
10K
Q330
2SC1815
Q330
2SC1815
Q302
2SA1015
Q302
2SA1015
R335
10K
R335
10K
Q332
2SA1015
Q332
2SA1015
P301A
12PIN2.0-A360B
P301A
12PIN2.0-A360B
2
3
4
1
5
6
7
8
9
10
11
12
Q324
2SA1015
Q324
2SA1015
Q312
2SC1815
Q312
2SC1815
R306
510
R306
510
D310
1N4148
D310
1N4148
R328
10K
R328
10K
R316
10K
R316
10K
R331
10K
R331
10K
R304
510
R304
510
R320
10K
R320
10K
R312
330
R312
330