NAD T977 C/AH, Руководство по обслуживанию, Страница: 17 / 37

P202A
P201A
DESIGNED BY:NAD T977 TEAM 2012/04/18
F203&F204 ARE T1.6AL/250V
C210
F203
T977 POW Board Upper - SOLDER SIDE
BUS203
F204 F201 F202
Q213
C225 C214
C248
W204
C223
C222
C291
C254
Q217
C250
Q214 b
R
242
R247
Q216 b
C249
R244
e
e
C253
R241
b
R
2
45
b
R
248
R249
R246
Q215
e
e
R243
C252
Q
239
B
R
206
H
S
210
B
R
207
C251
H
S
207
B
R
204
Q238
H
S
209
+
R
233
C243
C
246
C213
C211
BR202
C224
C212
BR203
W203
Q210
b e C245
e
b
Q212
R238
R235
R232
C247
b
R234
R239
b
Q211
e
R240
R236
e
R
237
Q
236
C240
J204
R228
H
S
208
C244
Q
237
B
R
205
~
-
~
+
~ ~
-
C221
F201&F202 ARE T1.6AL/250V
P209B
R229
D206
C241
P208B
C242
R2A3
S
T
BY
L
ED
P
R
O
T4
P
R
O
T3
T
H
E
R
M
AL
T977 SEVEN CHANNEL AMPLIFIER
P
R
O
T5
P
R
O
T2
P
R
O
T6
S
C
L
ED
P
R
O
T7
P
O
W
ER
SE
N2
SE
N7
SE
N3
SE
N6
SE
N4
A
G
ND
T977 POW Board Upper - COMPONENT SIDE
P205B
Q207
R
2
A2
IS
C
T
R
IG
_1
C275
IS
C
T
R
IG
_2
IS
C
T
R
IG
_3
IS
C
T
R
IG
_4
IS
C
T
R
IG
_6
SE
N5
D
G
ND
IS
C
T
R
IG
_5
IS
C
T
R
IG
_7
R
257
e e R
256
R
255
R
231
R
230
R
2
52
R
2
F6
D
223
R
2
F5
D
231
R
2
F4
R
2
F3
D
224
G2G1
A
C
CURR
E
NT
D
G
ND
+
5
VD
R
E
L
AY
P207A
C227
C228
IC
206
C
280
R
2
15
R
2
16
C281
C
262
R
2
E9
R
2
14
R213
C
2
30
c
Q
2
08
Q
2
34
e
R212
D
201
C258 C282
b
Q228
R
253
e
Q227
b
D230
e
R
2
F2
R
2
F1
Q218
REP
L
ACE
ON
L
Y
W
IT
H
SA
M
E
TYPE
F
USE
AND
RA
T
ING
F
OR
CON
T
INUED
PR
O
TE
C
T
ION
A
G
A
INS
T
R
ISK
O
F
F
IRE
+5VD
D
220
R261
R
2
E3
R
2
E4
D
229
D
207
PROT5
P206B
PROT6
A
TT
E
N
T
IO
N:
PROT4
PROT7
C
A
U
T
IO
N:
D
210
R
276
HS211
R
282
R
277
R
270
R
263
R262
C276 C273 R273
R
2
A1
C
259
R
2
A4 C271
R
2
E6
D226
R2A7
R2E5
D225
R2E1D221
R
271
R
265
R
2
64
R
266
R
274
IC203
TL084
R2E2 C264
R2A5
R269
C260
C272
R
2
A8
D
216
R
2
E8
D
217
b
e R
2
F7
Q
233
R
2
E7
D218
R
2
87
D
219
R
2
F8
R
291
C279
D212
R
288
R
289
R2A6
R
290
IC204
R268
D
215
R272
D
214
74HC21
R
285
R
2
92
R
284
R
286
SE
N1
R293
R
296
+5VD
+12VD
+12VD
U
T
IL
ISER
UN
F
US
IB
L
E
DE
DGND
RECHANGE
DE
M
E
M
E
TYPE
DGND
STBYLED
SCLED
PROT3
PROT1
PROT2
POWER
S
T
BY
D
227
+
5
VD
+
5
VD
P
R
O
T1
Q
240
D
G
ND
D
G
ND
D
228
b
e
BUS202
UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE
REPLACE ONLY WITH SAME TYPE FUSE AND RATING
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE
VM1.0 2012/04/18
T977 PS BOARD
Q201
D
205
Q242
HS206
Q235
Q206
R219
D
2
35
C231 R220
c
R218
C
236
D
233
C238
R
2
H4
D204 C239 C237
b
Q209
c
C232
D236
C284
e
c
e
C234 R225 R223
e R250
C233 R222
R2H3
D234
R224
e
D203
c
Q241 R221
e
D202
Q205
HS205
R
217
C229
C226
R211
R227
C283
C235
R226
R2H2
D237
C
220
C
219
C
216
R
208
R
206
R
204
R
202
Q
204
b
e
C
218
C
217
C
215
R
207
R
205
HS204
Q202
b
R
203
R
201
HS203
e
Q
203
W206
W205
W207
BUS201
BUS206
BUS204
C205
C204
-18V D
G
ND
b
-
+ ~
~
BR201
b
C201
C203
A
G
ND
C202
F
A
N1
F
A
N2
F
A
N3
-68V +
68V
A
C
O
FF
+
18V
Q220
HS202
HS213
IC202
HS201
IC201
R
2
78
HS212
Q219
C
2
74
R
267
R
279
R2A9
D
211
C
261
D208
C
277
R
283
R
2
75
W201 W
2
02
C
207
D209
C
209
C278
BUS205
C
208
R
2
97
b
Q
225
e
R
2
98
b
e
CAUTION:
ATTENTION:
Q
226
D
213
D222
R
2
59
b
e
Q
222
R
2
60
R
2
81
C
206
Q
232
b
R
2
58
e
and should be resumed after
during the test for 8ohms load
The two links should be shorted
b
R
2
99
e Q
2
21
R
2
10
b
R
2
80
e Q
231
R
2
09
b
R
2
94
e
Q
2
23
b
Q
224
R
2
95
e
J201
the test.
T977POW VM1.0
J202
P203B
Q
230
Q
229
D232
P204B
J203
+
RV201
G
ND
T
P1
- 17 -
PCB LAYOUT