NAD T955 AH Service Manual - page 8
ISC1
V-1
AGND1
AGND1
V+1
ACOFF1
DGND
SC
LED1
ISC2
V-2
AGND2
AGND2
V+2
ACOFF2
DGND
SC
LED2
ISC3
V-3
AGND3
AGND3
V+3
ACOFF3
DGND
SC
LED3
ISC4
V-4
AGND4
AGND4
V+4
ACOFF4
DGND
SC
LED4
ISC5
V-5
AGND5
AGND5
V+5
ACOFF5
DGND
SC
LED5
AC2
AC2
AC1
+5.5V
SC
+5.5V
STBYLED
LED1
LED5
LED4
LED3
LED2
STBYLED
STBY
DGND
DGND
DGND
STBY
+5.5V
SC
RELAY
THERMAL
/100V
/100V
/250V
/100V
/100V
/250V
/1/4W
/1/4W
/100V
/80V
/80V
/100V
/100V
/250V
/100V
/100V
/250V
/1/4W
/1/4W
/100V
/80V
/80V
/100V
/100V
/250V
/100V
/100V
/250V
/1/4W
/1/4W
/100V
/80V
/80V
/100V
/100V
/250V
/100V
/100V
/250V
/1/4W
/1/4W
/100V
/80V
/80V
/100V
/100V
/250V
/100V
/100V
/250V
/1/4W
/1/4W
/100V
/80V
/80V
/25V
F
R
OM
MA
IN
T
R
A
N
S
F
ORME
R
F
R
OM
MA
IN
T
R
A
N
S
F
ORME
R
F
R
OM
MA
IN
T
R
A
N
S
F
ORME
R
F
R
OM
MA
IN
T
R
A
N
S
F
ORME
R
F
R
OM
MA
IN
T
R
A
N
S
F
ORME
R
T
O
DI
SSPL
AY
BO
ARD
T
O
ST
ANDBY
B
OARD
F
R
OM
T
R
IG
B
OA
R
D
T
O
POWERAM
P
M
O
DULE1
T
O
POWERAM
P
M
O
DULE2
T
O
POWERAM
P
M
O
DULE3
T
O
POWERAM
P
M
O
DULE4
T
O
POWERAM
P
M
O
DULE5
FOR BR201,BR205,TH202&TH205
FOR BR202&TH202
FOR BR203&TH203
FOR BR204&TH204
FOR BR205&TH205
FOR BR210&TH210
FOR BR207&TH207
FOR IC201
All Polyester capacitors are 63V unless noted.
All Elec. capacitors are 50V unless noted.
All Resistor are 1/6W RJ13 unless noted.
/250V
1 2 3
BT151
LM7806
/100V
/100V
/100V
FOR BR202,BR206,TH201&TH206
FOR BR208,BR209,TH208&TH209
+
C240
6800uF
+
C240
6800uF
R207
1K
R207
1K
P203B
5PIN3.96-C
P203B
5PIN3.96-C
1
2
4
5
3
R228
100
R228
100
HS205
70-004003-1
HS205
70-004003-1
Q219
MPSA92
Q219
MPSA92
R241
1K
R241
1K
+
C203
10uF
+
C203
10uF
P204B
MOLEX 2145
P204B
MOLEX 2145
2
3
4
5
6
7
8
9
1
R244
22K
R244
22K
R231
22K
R231
22K
R250
1K
R250
1K
R208
1K
R208
1K
Q210
2SA1015
Q210
2SA1015
R243
22K
R243
22K
R214
1K
R214
1K
P213B
4PIN2.54-C
P213B
4PIN2.54-C
1
2
3
4
R238
1K
R238
1K
+
C216
10uF
+
C216
10uF
+
C220
6800uF
+
C220
6800uF
Q207
MPSA92
Q207
MPSA92
R267
470
R267
470
F212
T6.3AL/250V
F212
T6.3AL/250V
Q202
2SA1015
Q202
2SA1015
R225
10K
R225
10K
TH203
BT151-500R
TH203
BT151-500R
3
1
2
+
C209
6800uF
+
C209
6800uF
~
~
+
-
BR206
KBU8D
~
~
+
-
BR206
KBU8D
R253
1K
R253
1K
R218
100
R218
100
F206
T6.3AL/250V
F206
T6.3AL/250V
F202
T6.3AL/250V
F202
T6.3AL/250V
+
C247
10uF
+
C247
10uF
+
C213
6800uF
+
C213
6800uF
+
C229
6800uF
+
C229
6800uF
F204
T6.3AL/250V
F204
T6.3AL/250V
TH209
BT151X-500R
TH209
BT151X-500R
3
1
2
F216
T6.3AL/250V
F216
T6.3AL/250V
Q205
2SC1815
Q205
2SC1815
C224
10nF
C224
10nF
R237
10K
R237
10K
Q204
MPSA42
Q204
MPSA42
R234
15K
R234
15K
F218
T6.3AL/250V
F218
T6.3AL/250V
Q216
MPSA42
Q216
MPSA42
+
C218
10uF
+
C218
10uF
+
C238
6800uF
+
C238
6800uF
Q217
2SC1815
Q217
2SC1815
HS206
70-062007-0
HS206
70-062007-0
Q221
2SC1815
Q221
2SC1815
F211
T6.3AL/250V
F211
T6.3AL/250V
+
C250
2200uF
+
C250
2200uF
C233
10nF
C233
10nF
R230
100
R230
100
P201B
5PIN3.96-C
P201B
5PIN3.96-C
1
2
4
5
3
C207
100nF
C207
100nF
F220
T6.3AL/250V
F220
T6.3AL/250V
Q212
MPSA42
Q212
MPSA42
~
~
+
-
BR211
DB104G
~
~
+
-
BR211
DB104G
R246
15K
R246
15K
R211
1K
R211
1K
+
C225
10uF
+
C225
10uF
+
C245
10uF
+
C245
10uF
+
C227
10uF
+
C227
10uF
F215
T6.3AL/250V
F215
T6.3AL/250V
P207B
5PIN3.96-C
P207B
5PIN3.96-C
1
2
4
5
3
IC201
LM7806CT
IC201
LM7806CT
O
3
I
1
G
2
Q211
MPSA92
Q211
MPSA92
TH201
BT151X-500R
TH201
BT151X-500R
3
1
2
F208
T6.3AL/250V
F208
T6.3AL/250V
R205
22K
R205
22K
R216
100
R216
100
+
C222
6800uF
+
C222
6800uF
HS203
70-004003-1
HS203
70-004003-1
+
C211
6800uF
+
C211
6800uF
F203
T6.3AL/250V
F203
T6.3AL/250V
R249
10K
R249
10K
R266
100K
R266
100K
P209B
5PIN3.96-C
P209B
5PIN3.96-C
1
2
4
5
3
+
C234
10uF
+
C234
10uF
Q215
MPSA92
Q215
MPSA92
+
C236
10uF
+
C236
10uF
HS204
70-004003-1
HS204
70-004003-1
C215
10nF
C215
10nF
Q214
2SA1015
Q214
2SA1015
C201
10nF
C201
10nF
R217
1K
R217
1K
R252
100
R252
100
+
C231
6800uF
+
C231
6800uF
R254
100
R254
100
F219
T6.3AL/250V
F219
T6.3AL/250V
C206
100nF
C206
100nF
Q201
2SC1815
Q201
2SC1815
R248
4.7K
R248
4.7K
+
C226
10uF
+
C226
10uF
R227
1K
R227
1K
C242
10nF
C242
10nF
C212
100nF
C212
100nF
HS201
70-062007-0
HS201
70-062007-0
C248
100nF
C248
100nF
Q222
2SD667
Q222
2SD667
+
C205
10uF
+
C205
10uF
F207
T6.3AL/250V
F207
T6.3AL/250V
R203
1K
R203
1K
R236
4.7K
R236
4.7K
Q218
2SA1015
Q218
2SA1015
+
C235
10uF
+
C235
10uF
R224
4.7K
R224
4.7K
R210
1K
R210
1K
C239
100nF
C239
100nF
HS202
70-062007-0
HS202
70-062007-0
D205
1N4007
D205
1N4007
Q206
2SA1015
Q206
2SA1015
+
C208
6800uF
+
C208
6800uF
P202B
MOLEX 2145
P202B
MOLEX 2145
2
3
4
5
6
7
8
9
1
~
~
+
-
BR203
KBU8D
~
~
+
-
BR203
KBU8D
+
C244
10uF
+
C244
10uF
Q208
MPSA42
Q208
MPSA42
P208B
MOLEX 2145
P208B
MOLEX 2145
2
3
4
5
6
7
8
9
1
R239
1K
R239
1K
R257
1K
R257
1K
R212
100
R212
100
R219
22K
R219
22K
R256
22K
R256
22K
F201
T6.3AL/250V
F201
T6.3AL/250V
R265
1K
R265
1K
~
~
+
-
BR207
KBU8D
~
~
+
-
BR207
KBU8D
~
~
+
-
BR201
KBU8D
~
~
+
-
BR201
KBU8D
D202
1N4007
D202
1N4007
Q220
MPSA42
Q220
MPSA42
TH210
BT151-500R
TH210
BT151-500R
3
1
2
+
C217
10uF
+
C217
10uF
R260
4.7K
R260
4.7K
R206
22K
R206
22K
R258
15K
R258
15K
HS208
70-004003-1
HS208
70-004003-1
C202
10nF
C202
10nF
R255
22K
R255
22K
C230
100nF
C230
100nF
TH204
BT151-500R
TH204
BT151-500R
3
1
2
C214
10nF
C214
10nF
+
C204
10uF
+
C204
10uF
C232
10nF
C232
10nF
R201
4.7K
R201
4.7K
P211B
9PIN2.54-C
P211B
9PIN2.54-C
1
2
3
4
5
6
7
8
9
R213
10K
R213
10K
C219
100nF
C219
100nF
F210
T6.3AL/250V
F210
T6.3AL/250V
R221
1K
R221
1K
~
~
+
-
BR209
KBU8D
~
~
+
-
BR209
KBU8D
D203
1N4007
D203
1N4007
R204
10K
R204
10K
C221
100nF
C221
100nF
C237
100nF
C237
100nF
P212A
5PIN2.54-A150B
P212A
5PIN2.54-A150B
2
3
4
1
5
Q203
MPSA92
Q203
MPSA92
~
~
+
-
BR204
KBU8D
~
~
+
-
BR204
KBU8D
~
~
+
-
BR205
KBU8D
~
~
+
-
BR205
KBU8D
P206B
MOLEX 2145
P206B
MOLEX 2145
2
3
4
5
6
7
8
9
1
C246
10nF
C246
10nF
R209
100
R209
100
R233
1K
R233
1K
C228
100nF
C228
100nF
F214
T6.3AL/250V
F214
T6.3AL/250V
R220
22K
R220
22K
R259
1K
R259
1K
D204
1N4007
D204
1N4007
F213
T6.3AL/250V
F213
T6.3AL/250V
D201
1N4007
D201
1N4007
C249
100nF
C249
100nF
C241
10nF
C241
10nF
TH206
BT151X-500R
TH206
BT151X-500R
3
1
2
C210
100nF
C210
100nF
~
~
+
-
BR208
KBU8D
~
~
+
-
BR208
KBU8D
R242
100
R242
100
F205
T6.3AL/250V
F205
T6.3AL/250V
~
~
+
-
BR202
KBU8D
~
~
+
-
BR202
KBU8D
TH207
BT151-500R
TH207
BT151-500R
3
1
2
R232
22K
R232
22K
C223
10nF
C223
10nF
R251
1K
R251
1K
HS207
70-004003-1
HS207
70-004003-1
R222
15K
R222
15K
R226
1K
R226
1K
TH208
BT151X-500R
TH208
BT151X-500R
3
1
2
F209
T6.3AL/250V
F209
T6.3AL/250V
R235
1K
R235
1K
Q213
2SC1815
Q213
2SC1815
R240
100
R240
100
R202
15K
R202
15K
P205B
5PIN3.96-C
P205B
5PIN3.96-C
1
2
4
5
3
TH205
BT151X-500R
TH205
BT151X-500R
3
1
2
P210B
MOLEX 2145
P210B
MOLEX 2145
2
3
4
5
6
7
8
9
1
R229
1K
R229
1K
F217
T6.3AL/250V
F217
T6.3AL/250V
R245
1K
R245
1K
TH202
BT151X-500R
TH202
BT151X-500R
3
1
2
Q209
2SC1815
Q209
2SC1815
R215
1K
R215
1K
~
~
+
-
BR210
KBU8D
~
~
+
-
BR210
KBU8D
R223
1K
R223
1K
+
C243
10uF
+
C243
10uF
R247
1K
R247
1K
- 8 -
SCHEMATICS DIAGRAM