NAD C356BEE Service Manual - page 17
+55VA
Over Heat Protection:
It shut down the unit
when the temperature on
the heatsink is over 90C
degree
It alos shut down the unit
when the unit enter the
standby mode
ISC Circuit:
It switch the power
supply to lower voltage
when the load
impedance is low, or the
temperature on the
heatsink is over 80C
degree
C219
22n 10% 63V
RCA34F
MAIN-IN R-CH
R156
470K
R11
470
C11
10u/16V
R15
22K
R14
100
C15
220uF/63V
C16
220uF/63V
Q
110
K
S
A
1220
Q
111
K
S
C
2690
R124
3.
3/
0.
5W
F
P
R125
3.
3/
0.
5W
R128
330/
0.
5W
F
P
R129
330/
0.
5W
C110
47u/25V
C111
47u/25V
R126
3K3/2W FP
R127
3K3/2W FP
R130
82/1W FS
R131
82/1W FS
R142
22,MF,5%
R143
22,MF,5%
R136
10
R137
10
Q112
2SC5171
Q
115
2S
C5949
Q114
2SA2121
Q113
2SA1930
R144
0.068/3W CE
R145
0.068/3W CE
R139
412
L11
0.5uH
R150
1/1W FP
R151
10/1W FS
C118
0.1u 10% 63V
C115
0.1u
C114
0.1u
R21
470
R12
220K
R22
220K
C112
470p,100V,20%
C113
470p,100V,20%
R147
1K
Q11
C1815
Q12/1
A1015
R152
22K
R12/1
6K8
R148
56K
C120
22n 10%
D17
1N4148
RCA34E
MAIN-IN L-CH
R146
1K8,1W,1%,MF
Q116
KSC2690
R138
430
Q47
A1015
Q45
A1015
Q46
C1815
R417
100
R419
100
R418
100
R416
100
C415
10u/25V
C416
10u/25V
R422
1.3K
R423
1.3K
R424
1.3K
R425
1.3K
R420
36K
R421
36K
D411
20V
D410
20V
TP4
TP3
FS
FS
POWER AMP CIR. R
+55V
-55V
+55V
-55V
D11
4.7V
D12
4.7V
R108
39,MF,5%
R107
39,MF,5%
Q48
C1815
C17
0.1uF/63V
C12/1
10uF/25V
VR12
200
C119
22n 10% 63V
C21
10u/16V
R25
22K
R24
100
C25
220uF/63V
C26
220uF/63V
Q
210
K
S
A
1220
Q
211
K
S
C
2690
R224
3.
3/
0.
5W
F
P
R225
3.
3/
0.
5W
R228
330/
0.
5W
F
P
R229
330/
0.
5W
C210
47u/25V
C211
47u/25V
R226
3K3/2W
R227
3K3/2W
R230
82/1W FS
R231
82/1W FS
R242
22,MF,5%
R243
22,MF,5%
R236
10
R237
10
Q212
2SC5171
Q
215
2S
C5949-
O
Q214
2SA2121-O
Q213
2SA1930
R244
0.068/3W CE
R245
0.068/3W CE
R239
412
L21
0.5uH
R250
1/1W FP
R251
10/1W FS
C218
0.1u 10% 63v
C215 0.1u
C214
0.1u 10% 63V
TP1
C212
470p,100V,20%
C213
470p,100V,20%
R247
1K
R248
56K
R252
22K
Q21
C1815
C220
22n 10%
D27
1N4148
R246
1K8,1W,1%,MF
Q216
KSC2690
R238
430
TP2
FP
FS
FS
63V
+55V
-55V
D21
4.7V
D22
4.7V
R207
39,MF,5%
R208
39,MF,5%
C27
0.1uF/63V
R256
470K
R257
470K
C222
1uF,63V,5%
C221
1uF,63V,5%
R258
2.2k
-18V
+18V
VR22
200
POWER AMP CIR. L
L OUT
R OUT
D412
1N4148
BINDING POSTS
R446
56K
R445
56K
R441
5.6K,1/2W
PROTECTION CIR.
+26V
R478
100K
1
2
3
IC43A
TL082D
R480
4K3
R482
4K7
R479
100K
C428
10u/25V
C425
10u/25V
R470
10K
R471
10K
D418
1N4148
D417
1N4148
R477
47K
R483
270K
R473
51K
R472
470K
C426
10u/25V
C429
10u/25V
R488
18K
R487
18K
D420
1N4148
D419
1N4148
R474 1K
C430
10u/25V
R476
1K
C431
10u/25V
R490
100K
R491
100K
4
5
6
7
8
IC43B
TL082D
+18V
-18V
1
2
3
4
5
6
7
8
9
10
CB47
10PIN
1
2
3
CB45
R453
220/
2W
F
P
R452
220/
2W
F
P
R438
18K
R439
T0=90 degree C
Q412
C1815
POSISTOR
+18V
1
2
3
4
5
6
RL12/1
JQX-115F/024-2HS4AF
1
2
3
4
SPK A
R440
2K2
+18V
ISC CIRCUIT
+12V
Protection
Soft Cliping
+5V
+18V
-18V
+5V
+18V
-18V
+12V
Standby
STANDBY
I-V
AC DET.
ISC TRIG
Q421
C1815
R469
10K
R468
22K
R467
T0=80 degree C
D428
1N4148
+18V
SOFT CLIPING CIR.
7
6
5
4
8
IC42B
TL082D
-55V
+55V
P3-R
P4-R
P5-GND
R493
180k
VR3
10K
+18V
R133
3K
3/
2W
R132
3K
3/
2W
F
P
R232
3K
3/
2W
F
P
R233
3K
3/
2W
F
P
R260
1K,5%
R261
1K,5%
-55V
+55V
P1-L
P2-L
R157
470K
C122
1uF,63V,5%
C121
1uF
R158
2.2k
-18V
+18V
1
2
3
4
8
IC41A
TL082D
R160
1K,5%
R161
1K,5%
1
2
3
4
5
6
7
8
9
10
11
12
CB11
CON8
1
2
3
4
5
6
7
8
9
10
11
12
CB21
CON8
+18V
+18V
-18V
-18V
D101
1N4148
D102
1N4148
D103
1N4148
C123
0.
1uF
R162
1K
R163
1K
R164
10K/1W
R165
10K/1W
R167
1K
R166
5K6
R168
1K
D201
1N4148
D202
1N4148
D203
1N4148
C223
0.
1uF
R262
1K
R263
1K
R264
10K/1W
R265
10K/1W
R267
1K
R266
5K
6
R268
1K
Q217
2SA970
Q117
2SA970
Q118
2SC2240
Q218
2SC2240
IC11
AZ431
IC21
AZ431
R134
1M2
R234
1M2
C227
N.I.
C127
N.I.
TP10
TP11
R12/2
22K
C422
330u/16V
C421
0.
47uF
/50V
C432
0.22u
C420
100u/16V
1
2
3
4
5
6
7
8
IC44
Protection Module
R434
10K
R432
10K
R430
100
R433
100
Q424
C1815
Q425
C1815
R442
10k
R431
10k
Speak B
Speak A
1
2
3
4
SPK B
1
2
3
4
5
6
RL12/2
JQX-115F/024-2HS4AF
D413
1N4148
+26V
R OUT
L OUT
Q219
2SC2690
R270
2.2K
R170
2.2K
Q119
2SC2690
R498
1,1/4W
R499
1,1/4W
+5V
VR13
2K
R171
820
VR23
2K
R271
820
D429
1N4148
D430
1N4148
C228
10uF
C128
10uF
C129
6.8pF
R408
56k
R409
56k
SUPPLY CIR.
-55VA
+55VA
R45
3.3/0.5 FS
R41
680
R47
680
C43
220u/63V
C413
220u/35V
Q41
2SC2690
C45
22p
R49
680
R411
680
R413
680
C47
47u/50V
C49
10u/
50V
R414
6.8K
R46
51 / 1W FS
R42
680
R44
680
R48
680
C44
220u/63V
C414
220u/35V
Q43
C1815
C46
22p
R410
680
C48
10u/50V
C410
10u/
50V
R412
6.8K
Q42
2SA1220
Q44
A1015
C411 0.
1uF
C412
0.
1u
R428
2K2
R429
6K8
+26V
-26V
R401
10K
C443
0.1uF
R427
100/1W FP
Q413
KSC2690
Q414
C1815
+12V
C419
10uF/25V
Q422
C2690
Q423
C2240
R494
12
12V TRIG
C446
10uF
R495
510
R497 10K,1%
R496
100K,1%
C447
10uF
/50V
IC301
AZ431
D110
3.3V/1W
R484
1M,1%
R485
110K
R43
680
IN
IC401
LM317M
R492
6.2K
R486
470
C41
10u/25V
R435
470
C42
10u/25V
-18V
+18V
C449
10u/
50V
C448
0.1uF
C445
10u/
50V
C444
0.1uF
R415
6.2K
IC402
LM337M
+55VA
-55VA
Standby
+26V
-26V
+26V
-26V
1
2
CB48
To MDC MODULE
MDC GND
MDC 8.8V
1
2
CB12
R MAIN INPUT
1
2
CZ12
R MAIN INPUT
1
2
CB22
L MAIN INPUT
1
2
CZ22
L MAIN INPUT
Q1
2
A
1312-
G
R
Q1
3
C3324-
G
R
C12
1nF
R19
56k,MF,5%
R111
100,MF,5%
R112
100,
M
F
,5%
R110
56k,MF,5%
C14
10u/35V
C13
10u/35V
Q14
C3324-GR
Q15
A1312-GR
R115
15
R116
15
R103
82,
M
F
,5%
Q16
A1015
Q17
C1815
R119
82,MF,5%
R120
82,MF,5%
C18
39p
C19
39p
L12
100uF
R159
100,5%
1
2
3
4
5
6
7
8
9
10
11
12
CZ11
CON12
Q
102
A
1312-
G
R
R123
47K
R149
68,1/4 1% MF
Q1
9
2S
D1419-
DM
Q
101
C3324-
G
R
Q1
8
2S
B
1026-
DM
D13
1N4148
D15
1N4148
D14
1N4148
D16
1N4148
R104 220k
,M
F
,5%
R102
220k
,M
F
,5%
-18V
+18V
R154
10
R155
10
Q103
C3324-GR
R122
100K
,M
F
,5%
C103
22uF/16V
R101
39K,MF,5%
R121
100K,MF
R106
82,
M
F
,5%
R105
39k,MF,5%
Q
104
A
1312-
G
R
C104
22uF/16V
R169330
C124
1nF
Q2
2
A
1312-
G
R
Q2
3
C3324-
G
R
C22
1nF
R29
56k,MF,5%
R211
100,MF,5%
R212
100,
M
F
,5%
R210
56k,MF,5%
C24
10u/35V
C23
10u/35V
Q24
C3324-GR
Q25
A1312-GR
R215
15
R216
15
R203
82,
M
F
,5%
Q26
A1015
Q27
C1815
R219
82,MF,5%
R220
82,MF,5%
C28
39p
C29
39p
L22
100uF
R259
100,5%
1
2
3
4
5
6
7
8
9
10
11
12
CZ21
CON12
Q
202
A
1312-
G
R
R223
47K
R249
68,1/4 1% MF
Q2
9
2S
D1419-
DM
Q
201
C3324-
G
R
Q2
8
2S
B
1026-
DM
D23
1N4148
D25
1N4148
D24
1N4148
D26
1N4148
R204 220k
,M
F
,5%
R202
220k
,M
F
,5%
-18V
+18V
R254
10
R255
10
Q203
C3324-GR
R222
100K
,M
F
,5%
C203
22uF/16V
R201
39K,MF,5%
R221
100K,MF
R206
82,
M
F
,5%
R205
39k,MF,5%
Q
204
A
1312-
G
R
C204
22uF/16V
R269 330
C224
1nF
JK41
1
2
3
CZ45
PHONES SOCKET
N8C320D03
R455
100,2W
R454
100,2W
1
2
3
S41A
4
5
6
S41B
ON
OFF
R172
15,
M
F
,5%
R173
15,
M
F
,5%
R272
15,
M
F
,5%
R273
15,
M
F
,5%
D431
24V
D432
24V
C450
10u/50V
C132
6.8pF
D111
3.3V/1W
C133
N.I.
C233
N.I.
SCHEMATICS DIAGRAM(3/4)
AMP CIRCUIT Vm1.1
PCB-1:MAIN BOARD Vm2.0
AMP SMD R CIRCUIT Vm1.0
PCB-7:AMP SMD R BOARD Vm1.0
AMP SMD L CIRCUIT Vm1.0
PCB-8:AMP SMD L BOARD Vm1.0
HEADPHONE BOARD Vm1.0
PCB-6:HEADPHONE BOARD Vm1.0
17