Pcb Layout - NAD M25 C Service Manual

PSU BOARD - COMPONENT SIDE

PCB LAYOUT

+12VD
PROT1
SCLED
PROT2
PROT3
PROT3
PROT4
PROT4
PROT5
PROT5
STBYLED
PROT6
+5VD
PROT7
DGND
DGND P 206B
R254
R253
Q228
R251
R252 C258
6
P 207A
PSU BOARD - SOLDER SIDE
R280 Q231
Q221
P204B P205B R299
R210
RV201
J201
D212
R291 R292 R284 R286 R296
C267
R259 R281
Q222 R260 Q232
ATTENTION:
R285 R293
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE
C206
C208
REPLACE ONLY WITH SAME TYPE FUSE AND RATING
74HC21
CAUTION:
UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE
D216 D217 D218 D219 D215 D214 D213
IC204
IC201
HS201
R287 R290
Q233
D228 R2E 8 D226
R288 R289
R2E 2 R269 R272 C275
D222
D227 D229 R2E 7 R2E 5 C264 R2A6 R268 C207 C209
R2A3
R262 R2A4 R2E 3 R2E 4
TL084
C261 R275 IC202
C272 R2A9
HS202
R261 R2E 6 R2A7 R2A1
R263 C271 R265 R2A5 C260 R2A2 R279 D211
R270
R283
C259
D210
R2A8
R264 R266 R274 R267
R282 C270
D209
R276 R277 C268 D220 C273 R273 R2E 1 R271 C274 R278
HS211 D207 D225 D221 D208 C269
Q218 Q219 Q220
HS212
C257 C256 HS213
HS205 HS206
HS214
R2F2 C262 Q205
D202 D232 Q206
R2E 9 Q234 Q207
R214 R212 R250 C233 R222
Q235
R211
R213
R2F6 R2F1 C265 IC206 D201
Q227 D230 C226
R2F4 D224 C266 C235 R226 Q241
R217 R227
C229
R223
R215 R216 C230 R218 Q240 C234 R225
C263 R2F5 D231 D223 R2F3 D205 Q209
Q208 R221
D203 D204
1
- +
C228 R219 C231 R220 C236 C238 C239 C237
~
~ C227 C232
R2H2 R2H3
D235
BR208 D236
C255
C276 R2H4 C277
D233 D234
NAD M25 THX SEVEN CHANNEL AMPLIFIER
DESIGNED BY:HANSONG M25 TEAM
F203&F204 ARE T1.6AL/250V
R294 Q223 Q224
R209 R295
P203A F201&F202 ARE T1.6AL/250V
J202
J203
VM 1.0
The two links should be shorted
during the test for 8ohms load
and should be resumed after F 203 F204
the test.
R297 R298
Q225 Q226
R258
R2H1
BR201
C201
+
C204
C205
C202
C203
C210
BR202
~ ~
+
-
BUS202 BUS201
C211 C212
BUS 205
BUS204
BUS206
HS203
Q201
C215 R207 R205 R203 R201 Q203 C219 C217
HS204
Q202
R224
C216 R208 R206 R204 R202 Q204
C220 C218
2005/08/08
- 18 -
2005/08/08
Q230
R231
C241 P 208B
R255
P209B
Q229
R257
R230
R229
D206
R228
F201 F202
HS208 HS207 HS209
C240
BR205
BR204 BR206
Q237
Q236
Q239
C221
BR203
C246
C249
~ ~
Q238
+ -
C250
C243
R237 R248
R246
R236 R244
R235
b
Q212
C245 R240
R247
R233 e R245
b e b e
R239 Q216 e
Q213 Q217 b
R234 R243
R238 R242
b e e b e
Q214
Q210 b b
R241
R232
Q211
Q215
W203
C247 C253
C213 C224
C222
W204
C248 C254
C223
C214 C225
C290
C242
HS210
BR207
R249
C252
e