NAD C 325BEE Service Manual page 17

SCHEMATICS DIAGRAM(1/4)
AMP CIRCUIT Vm1.4
PCB-1:MAIN BAORD Vm2.0
39K,MF,5%
+18V
R101
R154
10
C103
22uF/16V
C13
10u/35V
R19
39k,MF,5%
+18V
C11
CZ11 CZ11 Q14
R111
C3324-GR
8 8 100,MF,5%
10u/16V 7 7
RCA35D
6 6
R11 R14 R115
MAIN-IN R-CH
5 5
15
470 100
4 4
C17
3 3
R12 0.1uF/63V
2 2
220K
1 1
R116
Q47 Q48 CON8 CON9 15
A1015
C1815 -18V
R15
22K C12
1nF Q15
A1312-GR
R418 R419
R110
100 100
39k,MF,5%
C14
10u/35V
C104
R155
22uF/16V
10
+46V
D410
R420
-18V
R105
36K
20V R422 39k,MF,5%
1.3K
R159 100,5%
C415
10u/25V
R424
L12 100uF
OFF
1.3K R149
68,1/4 1% MF
1 4
2 5
3 6
S41A S41B R425
ON
1.3K
C416
R423 10u/25V SOFT CLIPING CIR.
1.3K
-46V D411
R421
36K
20V
39K,MF,5%
+18V
R254 R201
10
R416 R417 C203
100 100 22uF/16V
C23
10u/35V
R29
39k,MF,5%
+18V
Q46 Q45 CZ21 CZ21 R211 Q24
C1815 A1015
100,MF,5% C3324-GR
8 8
7 7
RCA35C
R24 6 6
MAIN-IN L-CH R21 R215
5 5
C27 15
470 100 4 4
0.1uF/63V
3 3
R22
2 2
220K
C21 1 1
R216
10u/16V
15
CON8 CON9
-18V
R25 C22
22K
1nF Q25
A1312-GR
R210
39k,MF,5%
C24
10u/35V
C204
R255
22uF/16V
10
-18V
R205
39k,MF,5%
R259 100,5%
L22 100uF
R249
68,1/4 1% MF
+46V
P5-GND P4-R
R130
82/1W FS
R169 R162 D101 R132 R126
1M2 1K 1N4148 3K3/2W FP 3K3/2W FP
C15
220uF/63V
Q103
C3324-GR
R119
82,MF,5% R128
330/0.5W FP
R163
1K
D13
1N4148
Q16
A1015
Q117
D102
C18 2SA970
D15 1N4148
1N4148
39p
KSA1220
R121 Q110
D11
100K,MF C110 4.7V
47u/25V
R123
47K D12
4.7V
Q111 C111
D103
R164 R165 KSC2690 47u/25V
1N4148
C19 D16 10K 10K
39p
1N4148
Q17
Q118
C1815 R137
2SC2240
D14
R166
1N4148 R129
5K6
R120 330/0.5W
C123
82,MF,5%
0.1uF
IC11
AZ431
1nF
C124 C16 R168 R167 R133 R127
220uF/63V 1K 1K 3K3/2W 3K3/2W FP
R131
R169 330
82/1W FS
P/N: 01-32520-02
AMP-SMD MODULE R CHANNEL Vm1.4
PCB-5:AMP-SMD-R Vm1.0 POWER AMP CIR. R
R230
82/1W FS
R269 R262 D201 R232 R226
1M2 C25 1K 1N4148 3K3/2W FP 3K3/2W
220uF/63V
Q203
C3324-GR
R219
82,MF,5%
R263
1K
D23
1N4148
Q26
A1015
D202 Q217
C28 D25 1N4148 2SA970
1N4148
39p
Q210
R221 KSA1220
C210
100K,MF
47u/25V
R223
47K C211
D203
47u/25V
1N4148 4.7V
R264 R265
C29 D26
10K
10K
39p
1N4148
Q27
Q218
C1815 R237
2SC2240
10
D24
R266
1N4148
R220 5K6
82,MF,5% C223
0.1uF
IC21
AZ431
C224 1nF C26 R268 R267 R233 R227
220uF/63V 1K 1K 3K3/2W FP 3K3/2W
R231
R269 330
82/1W FS
P/N: 01-32520-01
AMP-SMD MODULE L CHANNEL Vm1.4
PCB-4:AMP-SMD-L Vm1.0 POWER AMP CIR. L
-46V +46V -46V
P3-R P2-L P1-L
+46V
C114
0.1u
R142 +37V
22,MF,5%
C12/1 +18V
R12/1 47uF/25V R427
6K8 22/1W FP
R107
Q12/1
Q114 D17 A1015
39,MF,5%
2SA1943 1N4148
R152
470p,100V,20%
C112 22K
R148
R136
Q414 C411
Q112 15K C1815 0.1uF
10 FS R147
KSC2690 Q11
TP3
C1815 C443
1K C118
Q413
0.1u 10% 63V
VR12 R151 +12V KSC2690 0.1uF
200 R144 C120 Q422
0.068/3W CE
22n 10% 10/1W FS D667
R495
C119 C419 510
L11
22n 10% 63V 10uF
0.5uH Q423
R138
430 C2240
C127
N.I.
R145 R150 R494
R156 1/1W FP
Q116 0.068/3W CE R146 12 C412
470K
KSC2690 1K8,1W,1%,MF C121 0.1u
1uF,63V,5%
TP4 12V TRIG
C446
R139
10uF -18V
412
FS
Q113
R160
KSA1220
10
C113 R108 1K,5%
3 -18V
470p,100V,20% 39,MF,5%
1
2
+18V
R161
IC41A
R143 TL082D 1K,5%
22,MF,5%
R483 C429
10u/25V
270K
-46V
R477
R157 C122 R158
C115 470K 1uF,63V,5% 2.2k
47K
0.1u ISC Circuit:
It switch the power
supply to lower voltage
R473
when the load
43K
impedance is low, or the
temperature on the C426
10u/25V
heatsink is over 80C
degree
+46V
ISC CIRCUIT
C214
R242
0.1u 10% 63V
22,MF,5%
RL12/1
F1AA012V
O/P RELAY
5 6
R207
Q214
39,MF,5% 3 4
470p,100V,20% 2SA1943
R252
C212
22K
D27
1N4148
R236
Q212 1 2
R248
KSC2690
10 FS 15K Q21
TP1 C1815
D412
R247
+18V 1N4148
1K R251 C218
VR22
10/1W FS
R244 0.1u 10% 63v
200 C220
0.068/3W CE
D21 22n 10%
L21
4.7V 63V
0.5uH
R250
R238
1/1W FP C219
430
C227
22n 10% 63V
N.I. R245
D22 R246
0.068/3W CE
Q216 1K8,1W,1%,MF
R256
KSC2690 C221
470K
1uF,63V,5%
TP2
R239
412 +18V STANDBY
Q213
R260
KSA1220 R438 R437 D431
FS 22K
C213 1K,5% 47K 3.6V
5 -18V
470p,100V,20%
7
Over Heat Protection: D43
6
It shuts down the unit
R208 1N4148
+18V
39,MF,5% R261 when the temperature on
the heatsink is over 90C
IC42B Q412
R243 TL082D 1K,5% degrees.
C1815
22,MF,5% It also shuts down the unit
when the unit enters the
standby mode. D42
-46V 1N4148
R439
R257 R258
C222
T0=90 degree C
470K 1uF,63V,5% 2.2k
C215
POSISTOR
0.1u
PROTECTION CIR.
17
SUPPLY CIR.
Q41 +37V
R45
2SC2690
33/0.5W FS
C47
R41
D49 47u/25V
R428 C413 680
18V
2K2
220u/35V
C445
R411 R49 R43
R414 C45
+5V
2K2
680 680 22p R47 680
MF 100uF
680
C43
STANDBY D403
R429 220u/63V
R401 1N4148 Q43
5K1
IC45
C1815 1
R413 4K7 AMS1117-5.0
680 C41
0.1uF C444
R410
Q44 C44 4700uF/16V
A1015
220u/63V
680
C46
R412 R48 R44
2K MF C48
680 680
10u/25V 22p D430
C414 R42
DB104
220u/35V 680 CB47
1
-37V
2
R46
3
Q42 33 / 0.5W FS 4
2SA1220 I-V
5
AC DET.
6
ISC TRIG
7
+18V
R474 1K
7PIN
C430 +18V
10u/25V
R482
R472 C425
4K7
470K 10u/25V
D428 R469 R468
R471 R470
TP10 1N4148
10K 10K 10K 22K
R478
6 2
7 1
100K
5 D417 IC43A 3 R493 Q421
D418
IC43B R479 C1815
1N4148 1N4148 TL082D 180k
TL082D
TP11 100K
C431
R476 R480 VR3
10u/25V R467
1K 3K9 10K T0=80 degree C
C428
10u/25V
-18V +18V
R490 R487
100K 18K
BINDING POSTS
SPKOUT
R491 R488
4
100K 18K
D420 D419 3
1N4148
1N4148
2
R OUT
1
L OUT
R446 R445
56K 56K
CB45 CZ45
N8C320D03
1 1
2 2
3 3
R452 220/2W FP 4 4
5 5
JK41
+46V R453 220/2W FP
PHONES SOCKET
R441
+18V
4.7K
+3.25V R454 R455
100,2W 100,2W
R440
2K2
C325BEE HEADPHONE BOARD Vm1.2
R442
PCB-10:HEADPHONE Vm1.0
56K
C420
+2.16V 100u/16V
R12/2
R443
22K
150 1/2W FS
STANDBY
1 IC44
UPC1237HA
Standby
6
0V Protection
Soft Cliping
2
+5V
+2.0V +18V
0V 0V +5V -18V
+18V +12V
C432
C422 0V
-18V -46V
0.22u C421
330u/16V +12V
4u7/50V
-46V
*
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