Page 1
C435
4n7/400V
!
AC POWER CORD
123
POWER SWITCH
CZ411
CZ411
123
CB410
CB411
!
NAD C320 RECTIFIERS CIR.
R444
22K
D413
1N4002
R463
22K
R458
1K
Q417
A1015
C417
R461
100
D431
TIC116D
R462
1K
R432
220
Q49
Q410
A1015
R431
0.05/3W 5% CE
!
GND
GND
+46V
-46V
123
4
CZ48
+46V
Q12/1
A1015
C12/1
47uF/25V
R152
22K
6K8
R12/1
D17
1N4148
63V
C114
0.1u 10%
2SA1943
Q114
R142
22
R107
39
C112
470p
R126
2K7/2W FP
330/0.5W FP
R128
FS
R130
82/1W
VR11
100
D13
1N4148
R119
47
C15
220uF/63V
R103
82
Q103
C2240
R102
220k
R101
39k
Q101
C103
100uF/16V
R19
39K
C13
10u/35V
R154
10
+18V
!
T401
SW42
123
123
!
10%
C41
10n/250V
10%
C42
10n/250V
!
!
15000uF/50V 10%
A1015
R433
Q11
R148
15K
R147
Q112
D669
FS
R136
10
R124
A1015
Q16
C2240
R111
VIO
RED
BLK
ORG
123
CZ41
CZ42
CON3
CON3
123
CB41
CB42
CON3
CON3
!
!
!
!
D41
D45
C418
R434
2K2
2M2
C1815
1K
TP3
3.3/0.5W FP
D15
Q18
B647
C18
22p
82
C17
MAIN-IN R-CH
F41
F42
F43
H1H2L1L2G
D426
1N4002
!
D424
1N4002
KBU8D
C423
3300u/50V
KBU8D
R4601KR459
Q418
C1815
D432
TIC116D
15000uF/50V 10%
R465
100
R464
R466
4K7
Q419
A1015
I-V
AC DET.
TRIG
CZ46
FP
R150
1/1W
L11 1uH
R151
10/1W FS
C120
63V
22n 10%
R144
R145
0.068/3W CE
0.068/3W CE
VR12
300
R138
390
D11
4.7V
D12
4.7V
Q116
KSC2690
C111
C110
47u/25V
B649
D669
Q110
Q111
1N4148
R123
47K
R121
100K
Q19
22p
C19
R11533R116
33
C2240
Q14
Q13
C2240
Q12
A970
C12
R14
100
R15
22K
C11
10u/16V
0.1uF/63V
R419
100
Q48
C1815
Q47
A1015
R418
100
R11
470
R12
220K
Pr
!
GRY
1234567
CON7
1234567
CON7
6.3A/250V X3
F44
!
D427
1N4002
D425
1N4002
C424
1K
22K
Q420
C1815
-37V
+37V
1234567
C118
1K2/2W 5% FP
R153
2K7/1W 1% MF
R146
Q113
TP4
R139
470
47u/25V
D16
1N4148
R122
100K
D667
Q17
Q15
A970
R11282R110
470p
2200u/50V
IC41
LM7805
C5
10n
TO CHASSIS
C119
22n 10% 63V
0.1u 10% 63V
150/1/4W 1% MF
R149
Q115
2SC5200
B649
C113
FS
R137
10
3.3/0.5W FP
R125
C1815
R106
82
Q102
A970
39k
R420
D410
+46V
F45
500mA/250V
D401
DB104
C433
2200uF
1
2
3
D429
1N4148
C436
100uF
-46V
C117
0.1u 10% 63V
C116 2200u/6.3V
R143
22
R108
39
470p
FP
R127
2K7/2W
330/0.5W FP
R129
FS
R131
82/1W
D14
1N4148
MF
R120
82
C16
Q104
A970
R104
220k
R105
39k
C104
100uF/16V
e
C14
10u/35V
R155
10
-18V
C415
R422
1.3K
R424
1.3K
36K
ON
20V
C115
0.1u 10% 63V
220uF/63V
10u/25V
456
S41B
S41A
123
+46V
R230
C25
220uF/63V
R201
R254
+18V
C416
10u/25V
R425
1.3K
OFF
R440
2K2
+18V
+46V
R441
15K
C420
100u/16V
R442
56K
+3.25V
R437
47K
STANDBY
R438
22K
+18V
R252
22K
63V
C214
0.1u 10%
D27
2SA1943
Q214
R242
22
R207
39
C212
FP
R226
2K7/2W
330/0.5W FP
R228
FS
82/1W
R219
47
l
VR21
100
MF
R203
C2240
Q203
R202
220k
39K
C203
100uF/16V
R29
39k
C23
10u/35V
10
R423
1.3K
R421
JK41
N8C320D03
PHONES SOCKET
12345
CZ44
123
5PIN
4
3
5
0V
0V
1N4148
22n 10%
63V
4.7V
A970
100
C27
470
R453
L21 1uH
0.1uF/63V
220/2W FP
C421
4u7/50V
C432
0.22u
0V
C422
330u/16V
R439
T0=90 degree C
POSISTOR
D22
Q211
R223
C21
R22
220K
CB49
-46V+46V
PROTECTION CIR.
R250
1/1W FP
R251
R245
0.068/3W CE
R238
390
4.7V
Q216
C211
47u/25V
D669
47K
22p
C29
33
Q23
C2240
C22
R25
10u/16V
4
4PIN
10/1W FS
1K2/2W 5% FP
R253
2K7/1W 1% MF
R246
Q213
TP1
R239
470
KSC2690
FP
D26
1N4148
100K
R222
Q29
D667
Q25
A970
R21282R210
470p
22K
12345
CB45
R452
220/2W FP
R443
150 1/2W FS
6
+2.0V
IC44
UPC1237HA
7
+2.16V
8
0V
1
2
22K
R12/2
Q412
C1815
D42
D43
1N4148
Q21
C1815
R248
15K
1N4148
C220
R247
1K
R244
0.068/3W CE
Q212
D669
TP2
470p
300
VR22
FS
R236
10
D21
mi
C210
47u/25V
3.3/0.5W FP
R224
Q210
B649
D25
1N4148
i
D23
1N4148
R221
100K
B647
A1015
Q26
Q28
C28
22p
82
R21533R216
C2240
Q24
Q201
C2240
R211
82
Q22
R24
R417
100
Q45
A1015
R416
100
Q46
C1815
36K
R21
20V
D411
-46V
MAIN-IN L-CH
C219
22n 10%
C218
0.1u 10%
150 1/4 1% MF
R249
Q215
2SC5200
B649
FS
R237
10
3.3/0.5W
R225
C1815
Q27
R206
Q202
A970
CB47
5.6V
R474 1K
+18V
63V
63V
C213
470p
FP
D24
82
39k
1234567
5PIN
-37V+37V
R482
4K7
R478
100K
R479
C425
10u/25V
2
3
1
R470
10K
D417
1N4148
C320BEE ISC CIRCUIT
R471
10K
D418
1N4148
7
C430
10u/25V
IC43B
8
R472
470K
5
6
C429
10u/25V
R477
47K
R483
330K
n
63V
-46V
C215
0.1u 10%
C217
0.1u 10% 63V
C216 2200u/6.3V
R243
22
R208
39
FP
R227
2K7/2W
330/0.5W
R229
FS
R231
82/1W
1N4148
MF
R220
82
C26
220uF/63V
Q204
A970
R204
220k
R205
39k
C204
100uF/16V
C24
10u/35V
R255
10
-18V
NAD C320BEE POWER AMP CIR.
TL082D
SPKOUT
123
BINDING POSTS
R480
6K2
R486
560K
+18V-18V
100K
C428
10u/25V
IC43A
TL082D
R488
39K
R487
39K
R490
100K
R491
100K
10u/25V
C431
4
R476
1K
C426
10u/25V
R473
47K
+12V
+18V
ar y
D412
1N4148
D428
1N4148
R469
10K
Q421
C1815
+18V
R468
22K
+12V
R427
22/1W FP
+37V
Q414
C1815
R428
2K2
+18V
C411
0.1u 10%
C49
47u/25V
MF
R414
2K2
D49
18V
R411
680
R49
680
C47
47u/25V
C45
22p
Q41
2SD669A
R47
680
C413
220u/35V
R45
33/0.5W FS
R43
680
R41
680
+37V
D423
1N4148
+18V
+18V
-18V
STANDBY
+12V
Protection
Soft Ind
+5.6V
+18V
-18V +5.6V
Remote Mute
Pre Mute
Standby
SPKOUT
4
C4 10n
UPC1237
12345678
L OUT
R OUT
D419
1N4148
D420
1N4148
R445
56K
R446
56K
O/P RELAY
RL12/1
F1AA012V
1 2
3 4
5 6
R467
T0=80 degree C
Q413
D669
R429
5K1
63V
C410
47u/25V
R412
R413
680
R401
4K7
D403
1N4148
R410
680
C46
STANDBY
Q43
C1815
Q44
A1015
R48
C43
220u/50V
C44
220u/50V
R44
R436
56K
R457
220K
R489
100K
Q411
A1015
R448
C412
2K
100K
V+
8
123
OUT A
0.1u 10%
MF
C48
10u/25V
22p
680
680
R435
R451
TIC116D
LM7805
OUT B
-IN A
TEXT
TEXT
63V
C414
220u/35V
680
R42
100K
330K
C434
22n/63V
-IN B
+IN A
TEXT
-18V
R46
33 / 0.5W FS
-37V
-46V
AKG
IN OUTGND
+IN B
567
4
V-
ECB
ECB
Q42
2SB649A
TL082D
2SA970
2SC2240
2SA1015
2SC1815
2SB649
2SD669
2SC5200
2SA1943
BCE
NAD C320 SUPPLY CIR.
Page 2
C320BEE INPUT SELECT CIRCUIT ON THE MAIN BOARD
C31
100p
C33
100p
C35
100p
C37
100p
C39
100p
C311
100p
C313
100p
C315
100p
C317
100p
C32
100p
C34
100p
C36
100p
C38
100p
C310
100p
C312
100p
C316
100p
C318
100p
RL31A
RL32A
RL33A
RL34A
RL35A
RL36A
RL37A
RL38A
R345
220K
MF
RL31B
RL32B
RL33B
RL34B
RL35B
RL36B
RL37B
RL38B
DISC
CD
VIDEO
AUX
TUNER
L-CH INPUTSR-CH INPUTS
TAPE2
REC2
TAPE1
REC1
TO CHASSIS
P8
DISC
CD
VIDEO
AUX
TUNER
TAPE2
REC2
TAPE1
REC1
R31
470
R349
1M
R33
470
R351
1M
R35
470
R353
1M
R37
470
R355
1M
R39
470
R357
1M
R311
470
R337
1M
R313
470
R338
1M
R315
470
R339
1M
R317
470
R32
470
R350
1M
R34
470
R352
1M
R36
470
R354
1M
R38
470
R356
1M
R310
470
R358
1M
R312
470
R341
1M
R314
470
R342
1M
R316
470
R343
1M
R318
470
R1
100
C1
10n
C314
100p
C319
0.1u 10%
63V
63V
C320
0.1u 10%
R346
220K
C325
47u/25
C321
0.1U
R319
N.I.
C320BEE TONE CONTROL CIRCUIT
R325
390 MF
R321
3K3 MF
C327
22n 5%
63V
R323
750 MF
C329
0.1u 5%
63V
R327
180 MF
OFF
SW31A
ON
10KA
RT31A
C331
0.22u 5%
63V
TREBLE POTTREBLE POT
R359
5K1 MF
1
2
3
TONE DEFEAT SW
C333
0.97u 5%
63V
C335
470P
R329
1K5 MF
RT32A
10KA
BASS POT
R331
390 MF
RT33A
20KB
VOLUME POT
BALANCE POT
RT34A
20K MN
BY MOTOR
C339
1u/16
C337
0.1U
RI2
1K
2SC1815
C341
R335
68
47u/25
R333
C345
4.7K
0.1U
+5V
+5V
QI1
C343
220p
QI2
2SA1015
Q31
K363
D31
10M
RI3
R347
100K
L PRE-OUT
PHONE1B
33
IR OUT
RI1
PHONE1A
1K
IR IN
+12V
PHONE2
+12V Trigger
D37
D38
DISC
1N4148
R58
10K
Q55
A1015
R59
1K
D39
1N4148
CD
VOLUME CONROL
C55
4u7/25V
+18V
C323
47u/25
LOW NOISE AMP MODULE
CB32
1
2
3
4
5
6
7
8
9
C324
47u/25
+18V
LOW NOISE AMP MODULE
CB33
1
2
3
4
5
6
7
8
9
-18V
1N4148
RL31C RL32C RL33C RL34C RL35C RL36CRL37C
C301
10uF/50V
-18V
Q56
C1815
J117
C326
47u/25
R326
R322
3K3 MF
C328
22n 5%
63V
R324
750 MF
C330
0.1u 5%
63V
R328
180 MF
OFF
SW31B
ON
390 MF
RT31B
10KA
C332
0.22u 5%
63V
R360
4
5
6
R330
1K5 MF
RT32B
10KA
BASS POT
C334
0.97u 5%
5K1 MF
63V
R332
390 MF
C336
470P
TONE DEFEAT SW
C322
0.1U
R320
N.I.
MF
D310
1N4148
VIDEO
+5.6V
MOTOR
M
R510
1K
RT33B
20KB
VOLUME POT
BALANCE POT
C56
4u7/25V
R513
1K
C302
220p
RT34B
20K MN
+12V
D311
1N4148
AUX
Q57
A1015
Q58
C1815
BY MOTOR
C340
1u/16
C338
0.1U
1N4148
TUNER
R511
10K
R512
1K
D312
R493
0
C342
47u/25
C346
0.1U
TAP2
D313
1N4148
RL38C
R336
68
R334
4.7K
C344
220p
TAP1
R3 100
D32
10M
Q32
K363
R2
10
C3
0.1uF
IRIN
IROUT
SOFT IND.
+12V
DISC
CD
VIDEO
AUX
TUNER
TAP2
TAP1
REMOTE MUTE
STANDBY
PROTECTION
+5V
VOLVOL+
+5.6V
+18V
-18V
R PRE-OUT
R348
100K
CB31
TO CZ52
10
9
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
CB34
TO CZ51
Protection
Remote Mute
Soft Ind
Pre Mute
+5.6V
+18V
-18V
Standby
C6
TO THE CHASSIS
10n
2SK369
GDS
MAIN POT
ALPS RK16812MG
12345678 123456789
PRE-AMP MODULE
1:
+18V
LOUT
LIN-2:3:
LIN+
4:
5:
GND
RIN+
6:
RIN-
7:
ROUT
8:
-18V
9:
Page 3
C551
10
10
+5V
+5V
+5V
+5V
C51
TO CHASSIS
W91
0.1uF
TO THE CHASIS TO THE CHASIS
C550
0.1uF
R516
10
R503
470
Q517
2SC1815
10K
S52
AUX
S53
CD
S55
TAPE1
S56
TUNER
S57
DISC
P02
P21
P22
P20
14
13
18
P2015P2116P2217P23
GND
P241P252P263P274VCC5X26X17P318P32
IC53
MICOM
7
6
8
5
NC
Vcc
SCL
SDA
NC1NC2NC3Vss
24C01
4
C57
10n
10K
S
G
W53
IS1U60L
VCC V
VSG
1
3
2
SHIELDING
Pr
N8C320F08
C58
0.1u 20%
R508
10K
C52
0.1uF
100u/16V
R502
IC51
R53
IC52
P9
IR RECEIVER
R515
ARE NOT INSERTED IN AH VERSION
R514
NOTE: R514 R515 R516 AND C550 C551 C552
NAD C 320BEE KEY BOARD
TO THE CHASIS
C552
0.1uF
S51
VIDEO
S54
TAPE2
P00
P01
P3310P0011P0112P02
Z86C0812PSC
9
C8
C510
Y51
C59
D510
1N4148
+5V
POWER/PROTECTION IND.
123456789
CZ52
TO CB31
TUNER
TAP2
R528
D514
1N4148
+12V
R556
10K
R557
10K
R558
+5V
220p BACKUP N.I.
22p
12MHz
22p
D511
1N4148
e
LD42
513AW
RED GREEN
N8C320F06
10
+12V
CD
VIDEO
AUX
DISC
SOFT IND.
IR IN
IR OUT
+5V
SOFT CLPPING IND.
+12V
R526
2K2
R527
2K2
Q51
A1015
4K7
D59
6V8
R529
10K
10K
C512
0.1u 20%
l
+5V
C511
0.1u 20%
+5V
D512
1N4148
CB53
CZ43
123
123
W256
LD41
GREEN
TAPE1
AMBER
D55
D57
DISC
GREENGREENGREENGREEN GREEN GREEN
D54
TAPE2
D52
AUX
D56
TUNER
D51
VIDEO
D53
CD
1
D
2
3
OE
15
IC54
4094
1
i
D
2
3
OE
15
IC55
4094
D513
1N4148
D515
1N4148
R52
470
R51
680
1234567
REMOTE MUTE
PROTECTION
GND
+5V
+12V
C1815
R547
4K7
C1815
R546
4K7
C1815
R545
4K7
C1815
R544
4K7
C1815
R543
4K7
C1815
R542
4K7
C1815
R541
4K7
4
5
6
7
14
13
12
11
9
10
4
5
6
7
14
13
12
11
9
10
15K
R530
C1815
R501
2K2
8
VCC
VOL-
VOL+
R554
4K7
R553
4K7
R552
4K7
R551
4K7
R550
4K7
R549
4K7
R548
4K7
CVITUAUT2 T1DI
C
VI
TU
AU
T2
T1
DI
MUTING BLINK
5K1
R533
Q516
Q52
VCC
+12V
SOFT IND.
VOLVOL+
C1815
REMOTE MUTE
IR IN
IR OUT
PROTECTION
Q53
C1815
C1815
CZ51
TO CB34
TAP1
R426
910
Q515
C520
10n
Q514
C519
10n
Q513
C518
10n
Q512
C517
10n
Q511
C516
10n
Q510
C515
10n
Q59
C514
10n
CD VIDEO TUNER AUX TAP2 TAP1DISC
STR
Q1
Q2
CLK
Q3
Q4
Q5
Q6
Q7
Q8
mi
QS
QS
STR
Q1
Q2
CLK
Q3
Q4
Q5
Q6
Q7
Q8
QS
QS
Q54
+5V
+12V
NC
SCL
SDAGND
VCC
NCNCNC
IC51: 24C01
513AW
OE
Q5
Q6Q7Q8QSQS
VCC
IS1U60L
D
CLKQ1Q2Q3Q4
STR
IC54 IC55: CD4094
151617
18
PORT2/0
PORT2/1
PORT2/2
PORT2/3PORT2/4
Z86C0812PSCIC53:
PORT2/5
PORT2/6
PORT2/7
12345678910
GND
PORT3/2 PORT3/3
TEXT:
2SK369
2SA1015
2SC1815TEXT
11
12
13
14
ar y
GND
PORT0/0
PORT0/1
PORT0/2
VCC
XTAL2
XTAL1
PORT3/1
n
10
Q64
B647
R619
R615
33
Q67
D667
R611
Q63
A970
R67
1K
C61
C66
0.1u 20%
Q68
D667
Q65
A970
1K
R68
C68
0.1u 20%
C62
220p
R621
+18V
C320BEE PREAMP MODULE
J61
1K
220p
R612
1K
C64
15p
Q62
120
LOUT
123456789
R62
C63
Q61
220
LIN-
15p
2SK369
R61
R620
R616
2SK369
LIN+
10
33
GND
D61
R69
220
R610
1N4148
430 2%
C69
D63
430 2%
C610
R64
RIN+
100p
R63
1M
1N4148
100p
1M
RIN-
ROUT
R617
R618
-18V
R65
R66
10
560 2%
10
560 2%
D62
1N4148
D64
1N4148
R613
10K
C65
0.1u 20%
Q66
B647
R614
C67
0.1u 20%
C611
40P LINEIN MODULE
1: RED INDICATOR
2: COMMON CATHODE
3: GREEN INDICATOR
1: SIGNAL
2: GND
3: VCC
123 1 2 3
GDS
2SD667
2SB647
ECB
10K
15P LINEOUT MOULE
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