Schematic Diagram - NAD C275BEEC/AH Service Manual

SCHEMATICS DIAGRAM
P201B P201B
BR201 BR201
KBU8D KBU8D
5
4
3
2
1
5PIN3.96-C 5PIN3.96-C
All Polyester capacitors are 63V unless noted.
All Elec. capacitors are 50V unless noted.
All Zener diodes are 1/2W unless noted.
All Resistor are 1/6W unless noted.
P202B P202B
1
2
3
4
5
5PIN3.96-C 5PIN3.96-C
R2G1 R2G1
0 0
C280 C280
N.I. N.I.
C211 C211
1uF 1uF /50V
+36V
R267 R267
47K 47K
R219 R219
4.7K 4.7K
8 6
R220 R220
IC205 IC205
N.I. N.I.
HS1237 HS1237
7 5
+ + + +
C233 C233
C232 C232 C234 C234
330uF 330uF /16V 220nF 220nF
100uF 100uF /16V
PAD1 PAD1
R221 R221 R222 R222
Solder Pad Solder Pad
56K 56K 56K 56K
PAD2 PAD2
Solder Pad Solder Pad
PAD3 PAD3
Solder Pad Solder Pad
PAD4 PAD4
C239 C239
N.I. N.I.
Solder Pad Solder Pad
PAD5 PAD5
Solder Pad Solder Pad
PAD6 PAD6
C240 C240
N.I. N.I.
Solder Pad Solder Pad
R242 R242
1
2
10K 10K
3
4
5
J201 J201
PHONEJACK PHONEJACK
R243 R243
10K 10K
S204B S204A S204A S204B
R244 R244
1 4
+5V
10K 10K
5 2
6 3
SK-22F03-G7 SK-22F03-G7 SK-22F03-G7 SK-22F03-G7
P203B P203B
PROTECT
1
SIGNAL
2
12V TRIG IN
3
DGND
4
MUTE
5
SEN DEFEAT
6
7 TRIG ENABLE
SC LED
8
BG LED
9
+5V
10
+5V
+15V
11
+15V
AGND
12
12PIN2.54-C 12PIN2.54-C
BR202 BR202
~ ~ ~ ~
KBU8D KBU8D
- - + + - - + +
~ ~ ~ ~
~ ~ ~ ~
- - + + - - + +
~ ~ ~ ~
BR203 BR203
BR204 BR204
DB104G DB104G
DB104G DB104G
D201 D201
1N4007 1N4007
R210 R210
220K 220K
D203 D203
R223 R223
VCC
24.9K 24.9K /1%
24V 24V /1/2W
R225 R225
1K 1K /1%
S201 S201
6 3
5 2
R226 R226
1K 1K /1%
4 1
SK-22F03-G7 SK-22F03-G7
SOFT CLIPPING
NORMAL POSITION
R227 R227
1K 1K /1%
R228 R228
D204 D204
1K 1K /1%
24V 24V /1/2W
R224 R224
VSS
24.9K 24.9K /1%
R236 R236 L201 L201
3.3 3.3 /1W 1uH 1uH
L202 L202
3.3 3.3
1uH 1uH
RL201A RL201A
4
C238 C238
3
C237 C237 10nF 10nF
JQX-115F/036/1HS1 JQX-115F/036/1HS1
10nF 10nF
RL202A RL202A
4
3
JQX-115F/036/1HS1 JQX-115F/036/1HS1
R239 R239
R240 R240
+36V
180 180 /2W 820 820
Q206 Q206
D202 D202
2SA1015 2SA1015
1N4148 1N4148
1
2
RL201B RL201B JQX-115F/036/1HS1 JQX-115F/036/1HS1
JQX-115F/036/1HS1 JQX-115F/036/1HS1
C261 C261
R248 R248
10K 10K
100uF 100uF /6.3V
Q207 Q207
2SC1815 2SC1815
D213 D213
1N4148 1N4148
R249 R249
C241 C241 R247 R247
100nF 100nF 1meg 1meg
100nF 100nF
D214 D214
TL082CP TL082CP
D216 D216
1N4148 1N4148
1N4148 1N4148
D219 D219 D220 D220
10pF 10pF
1N4148 1N4148 1N4148 1N4148
D215 D215
D217 D217
1N4148 1N4148
1N4148 1N4148
Q203 Q203
R207 R207
MPSA92 MPSA92
100 100
R202 R202
22K 22K
R204 R204
1K 1K
2
+ + TH201 TH201
C203 C203 BT151-500R BT151-500R
10uF 10uF /100V
Q201 Q201
2SC1815 2SC1815
+ +
C204 C204
TH202 TH202
10uF 10uF /100V
BT151-500R BT151-500R
1
R206 R206
1K 1K
R201 R201
Q202 Q202
Q204 Q204
R205 R205
2SA1015 2SA1015
MPSA42 MPSA42
10K 10K
1K 1K
R203 R203
22K 22K
IC201 IC201
NJM317F NJM317F
3 2
I O
R213 R213
240 240 /1%
+ + C214 C214 + +
C212 C212 100nF 100nF
2200uF 2200uF
+ +
C216 C216
10uF 10uF
+ +
C217 C217
10uF 10uF
+ + + +
C213 C213
C215 C215
2200uF 2200uF
100nF 100nF
R214 R214
240 240 /1%
2 3
I O
IC202 IC202
LM337T LM337T
R229 R229
+26V
2.2K 2.2K
S202A S202A
1
R231 R231
+ +
C235 C235
2
4.7K 4.7K
10uF 10uF
3
SK-22F03-G7 SK-22F03-G7
R230 R230
BRIDGE
100K 100K
STEREO POSITION
R232 R232
-26V
22K 22K
+ +
C236 C236
10uF 10uF
R237 R237
/1W
S203 S203
4 1
5 2
D206 D206
1N4148 1N4148
6 3
SK-22F03-G7 SK-22F03-G7
Fixed/Variable In
FIXED POSITION
R238 R238
10K 10K
C248 C248
10uF 10uF
R255 R255
10K 10K
R241 R241
RL202B RL202B
4.7K 4.7K
1
C247 C247
2
100nF 100nF
6
RV201B RV201B
R250 R250
+5V 1KA 1KA
22 22
C244 C244
10K 10K
100uF 100uF /6.3V
R251 R251
100K 100K
C242 C242
R252 R252
5
+ +
7
100K 100K
6
- -
+ +
IC206B IC206B
All Polyester capacitors are 63V 10% unless noted.
R253 R253 C245 C245
100K 100K 10uF 10uF
All Elec. capacitors are 50V 20% unless noted.
C243 C243
/1KV
All Resistor are 1/6W 5% RJ13 unless noted.
All Zener diode are 1/2W unless noted.
C246 C246
R254 R254
330K 330K
100nF 100nF
- 8 -
HS201 HS201
R208 R208
1K 1K
70-004003-1 70-004003-1
FOR BR201&TH201
1
+ +
C207 C207
C205 C205
100nF 100nF /100V 22000uF 22000uF /100V
+ +
C206 C206
C208 C208
100nF 100nF /100V 22000uF 22000uF /100V
2
HS203 HS203 HS204 HS204
R209 R209
100 100
70-004003-1 70-004003-1
70-004003-1 70-004003-1
FOR IC201&IC202 FOR IC203&IC204
IC203 IC203
NJM317F NJM317F
3 2
I O
R217 R217
240 240 /1%
C218 C218
10uF 10uF C220 C220
+ + C226 C226
C224 C224
100nF 100nF 100nF 100nF
10uF 10uF
+ +
C222 C222
10uF 10uF
+ +
C223 C223
10uF 10uF
C221 C221 + + C227 C227
100nF 100nF C225 C225 100nF 100nF
10uF 10uF
C219 C219
10uF 10uF
R218 R218
240 240 /1%
2 3
I O
IC204 IC204
LM337T LM337T
+5V
R233 R233
33K 33K
Q205 Q205
2SA1015 2SA1015
D205 D205
R234 R234
22K 22K
1N4148 1N4148
R235 R235
1K 1K
STEREO POSITION
D208 D208
D210 D210
1N4148 1N4148
1N4148 1N4148
D212 D212 D218 D218
C249 C249 C251 C251
C250 C250
100nF 100nF 100nF 100nF
10uF 10uF
1N4148 1N4148 1N4148 1N4148
D209 D209
D211 D211
1N4148 1N4148
1N4148 1N4148
-26V
01-37506-00
+ +
C255 C255
C254 C254
10uF 10uF
10uF 10uF
Vss Vss Vcc Vcc
9
+ +
4 1 3 7
L L
8
RV201A RV201A - -
1KA 1KA
2
+ +
4
R R
3
- -
GNDR GNDR GNDL GNDL
M201 M201
HS OPAMP STEREO HS OPAMP STEREO
HS202 HS202
70-004003-1 70-004003-1
FOR BR202&TH202
P204A P204A
VCC
1
2
3
4
L O/P
5
5PIN3.96-AxxB 5PIN3.96-AxxB
P205A P205A
1
VSS
2
3
4
R O/P
5
5PIN3.96-AxxB 5PIN3.96-AxxB
+36V
+80V
+26V
+15V
+ +
+ +
-15V
-26V
-80V
P206B P206B
11PIN2.54-C 11PIN2.54-C
1
+15V
2
-15V
3
4
5
+80V
6
-80V
PROTECT L 7
SCN/MUTE
8
SCP
9
ISC 10
BR
11
P207B P207B
1
+15V
2
-15V
3
RELAY
4
5
+80V
6
-80V
PROTECT R
7
SCN/MUTE
8
SCP
9
ISC
10
BRIDGE
11
11PIN2.54-C 11PIN2.54-C
P208A P208A
8PIN2.54-A200B 8PIN2.54-A200B
S202B S202B
1
SK-22F03-G7 SK-22F03-G7
4 2
3
5 4
5
6 6
7
8
R245 R245
BRIDGE
2.2K 2.2K /3W
+5V
R259 R259
100K 100K
R257 R257
3
+ +
1
100K 100K
2
- -
+ +
IC206A IC206A
C253 C253
R258 R258
TL082CP TL082CP
100K 100K 10uF 10uF
C252 C252
10pF 10pF /1KV
C260 C260
+26V
100nF 100nF
R260 R260
RCA201A RCA201A
330K 330K
2 HOLES 2 HOLES
C256 C256
R263 R263
1
220 220
100nF 100nF
R265 R265
R261 R261
C258 C258
1meg 1meg
N.I. N.I.
100pF 100pF /1KV
R266 R266
R262 R262 C259 C259
N.I. N.I. 1meg 1meg
100pF 100pF /1KV
C257 C257
R264 R264
2
220 220
100nF 100nF
RCA201B RCA201B
2 HOLES 2 HOLES