NAD C 320BEE Administrator Guide

NAD
SERVICE MANUAL
C 320BEE
STEREO
AMPLIFIER
C 320BEE STEREO AMPLIFIER

Preliminary
JK41
1 2 3 4 5
CZ44 PHONES SOCKET
N8C320D03
AC POWER CORD
C435
4n7/400V
SW42
POWER SWITCH
T401
1 2 3
CZ411
RED GRY BLK
ORG
VIO
!
!
!
C41
10n/250V
D41 KBU8D
C42
10n/250V
D45
KBU8D
C417
15000uF/50V 10%
C418
15000uF/50V 10%
Q418 C1815
Q417 A1015
D431
TIC116D
D432 TIC116D
R458 1K
R463 22K
R461 100
R462 1K
R460 1K R459 1K
R465 100 R464 22K
R431
0.05/3W 5% CE
R432 220
Q410 A1015
Q49 A1015
R434 2K2
R433 2M2
Q419 A1015
Q420 C1815
R466 4K7
D413 1N4002
R444 22K
C423 3300u/50V C424 2200u/50V
1 2 3 4
CZ48
1 2 3 4 5 6 7
CZ46
D426
1N4002
D424 1N4002
D427
1N4002
D425 1N4002
1 2 3
CB410
!
!
!
!
!
C5 10n
TO CHASSIS
F41 F42 F44 F43
! !
! !
!
!
H1
H2
L1
L2
G
GND GND +46V -46V
-37V +37V I-V AC DET. TRIG
NAD C320 RECTIFIERS CIR.
10% 10%
R12/2
22K
C4 10n
O/P RELAY
L OUT
R OUT
D412 1N4148
BINDING POSTS
R446 56K
R445 56K
C422
330u/16V C421
4u7/50V
C432 0.22u
R443 150 1/2W FS
R441 15K
R442 56K C420
100u/16V
PROTECTION CIR.
0V
0V
+3.25V
+2.16V
0V 0V
+2.0V
+18V
+46V
R478 100K
1
2 3
IC43A TL082D
R480 6K2
R482 4K7
R479 100K
C428
10u/25V
C425 10u/25V
R470 10K
R471 10K
D418 1N4148 D417
1N4148
R477 47K
R483 330K
R473 47K
R472 470K
C426
10u/25V
C429
10u/25V
R488 39K R487 39K
D420
1N4148
D419 1N4148
R486 560K
R474 1K
C430 10u/25V
R476 1K
C431
10u/25V R490
100K R491 100K
4
5 6
7
8
IC43B TL082D
+18V
+18V-18V
1 2 3 4 5 6 7
CB47 5PIN
-37V+37V
1 2 3 4
CB49 4PIN
-46V+46V
1 2 3 4 5
CB45 5PIN
R453 220/2W FP
R452
220/2W FP
R438 22K
R439 T0=90 degree C
Q412 C1815
POSISTOR
+18V
R45
33/0.5W FS
R41 680
R43 680
R47 680
C43 220u/50V
C413
220u/35V
Q41 2SD669A
C45 22p
R49 680
R411 680
R413 680
D49 18V
C47
47u/25V
C49
47u/25V
R414 2K2
R46
33 / 0.5W FS
R42
680
R44 680
R48 680
C44 220u/50V
C414
220u/35V
Q43 C1815
C46 22p
R410 680
C48 10u/25V
C410 47u/25V
R412 2K
Q42
2SB649A
Q44 A1015
C411
0.1u 10%
C412
0.1u 10%
R428 2K2 R429 5K1
MF MF
-37V
+37V
NAD C320 SUPPLY CIR.
63V
63V
+18V
-18V
Q411 A1015
R436 56K
R435 100K
R489 100K
R457 220K
R451 330K
D423 1N4148
R448 100K
C434 22n/63V
R427 22/1W FP
Q413 D669
Q414 C1815
+37V
+12V
+18V
+12V Protection Soft Ind +5.6V +18V -18V +5.6V
+18V
-18V
+12V
Remote Mute Pre Mute
5.6V
Standby
STANDBY
R11 470
C11
10u/16V
R15 22K
R14 100
Q12 A970
Q13 C2240
C12 470p
R19 39K R111 82 R112 82 R110 39k
C14 10u/35V
C13
10u/35V
Q14
C2240
Q15 A970
R115 33 R116 33
Q16
A1015
Q17
C1815
R119 47
R120 82
C18
22p
C19
22p
C15 220uF/63V
C16 220uF/63V
Q110
B649
Q111
D669
R124
3.3/0.5W FP
R125
3.3/0.5W FP
R128
330/0.5W FP
R129
330/0.5W FP
R123 47K
C110 47u/25V
C111 47u/25V
R126
2K7/2W FP
R127
2K7/2W
R130
82/1W
R131 82/1W
R142 22 R143 22
R136 10
R137 10
Q112 D669
Q115
2SC5200
Q114
2SA1943
Q113
B649
R144
0.068/3W CE
R145 0.068/3W CE
R139 470
VR12 300
R153
1K2/2W 5% FP
R149
150/1/4W 1% MF
C116 2200u/6.3V
C117 0.1u 10% 63V
L11 1uH
R150 1/1W
R151
10/1W FS
C118 0.1u 10% 63V
C119 22n 10% 63V
C115 0.1u 10% 63V
C114
0.1u 10%
Q19 D667
Q18
B647
D13 1N4148
D15
1N4148
D14 1N4148
D16 1N4148
R121 100K
R122 100K
R21 470
C21 10u/16V
R25 22K
R24 100
Q22 A970
Q23 C2240
C22 470p
R29 39k R211 82 R212 82 R210 39k
C24 10u/35V
C23 10u/35V
Q24
C2240
Q25 A970
R215 33 R216 33
R203
82
Q26
A1015
Q27
C1815
R219 47
R220 82
C28
22p
C29
22p
C25 220uF/63V
C26 220uF/63V
Q210 B649 Q211 D669
R224
3.3/0.5W FP
R225
3.3/0.5W
R228
330/0.5W FP
R229
330/0.5W
R223
47K
C210 47u/25V
C211 47u/25V
R226 2K7/2W R227 2K7/2W
R230 82/1W
R231
82/1W
R242 22 R243 22
R236 10
R237
10
Q212 D669
Q215
2SC5200
Q214
2SA1943
Q213 B649
R244 0.068/3W CE R245 0.068/3W CE
R239 470
VR22
300
R253
1K2/2W 5% FP
R249
150 1/4 1% MF
C216 2200u/6.3V
C217 0.1u 10% 63V
L21 1uH
R250
1/1W FP
R251
10/1W FS
C218 0.1u 10%
C219 22n 10%
C215
0.1u 10%
C214 0.1u 10%
TP1
Q29 D667
Q28
B647
D23 1N4148
D25 1N4148
D24 1N4148
D26 1N4148
R221 100K R222
100K
R12 220K R22 220K
C212 470p
C213 470p
C112 470p C113 470p
R147 1K
Q11 C1815
Q12/1 A1015
R152 22K
R12/1
6K8
R148 15K
C120
22n 10%
D17 1N4148
R247 1K
R248 15K
R252 22K Q21 C1815
C220
22n 10%
D27 1N4148
MAIN-IN L-CH
MAIN-IN R-CH
R146
2K7/1W 1% MF
R246
2K7/1W 1% MF
R154 10
R155 10
R254 10
R255 10
Q116 KSC2690
Q216
KSC2690
R138 390 R238 390
FP
FP
FP
FS
FS
FS
FS
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
1 2 3
S41A 4
5 6
S41B
ON
OFF
TP4 TP3 TP2
FS
FS
FP
FP
FP
FS
FS
NAD C320BEE POWER AMP CIR. 63V
63V
63V
63V
63V
63V 63V
MF
MF
MF
Q203
C2240
C203
100uF/16V
R201 39K
R206 82
R205 39k
C204
100uF/16V Q204
A970
-18V
+18V +18V
-18V
+46V
-46V
+46V
-46V
+46V
-46V
R202 220k R204 220k
D21 4.7V D22 4.7V D11 4.7V D12 4.7V
R103 82
Q103 C2240
C103
100uF/16V
R101 39k
R106 82
Q104 A970
C104 100uF/16V
R105 39k
R104 220k R102 220k
Q201 C2240 Q202 A970
R207 39 R208 39
Q101 C2240 Q102 A970
R108 39 R107 39
VR11 100
VR21 100
Q48 C1815
1 2
3
4
5
6
7
8
IC44 UPC1237HA
1 2
3 4 5 6
RL12/1
F1AA012V
1 2 3 4
SPKOUT SPKOUT
-46V
R401 4K7 D403 1N4148
STANDBY
D42 1N4148 D43 1N4148
R437 47K
STANDBY
1
2
3
IC41 LM7805
D401 DB104
D429 1N4148
C433 2200uF
C436 100uF
C17 0.1uF/63V
C27 0.1uF/63V
C12/1
47uF/25V
Q421 C1815
R469 10K
R468 22K
R467
T0=80 degree C
D428 1N4148
+18V
1 2 3 4 5 6 7
CB41 CON7
1 2 3 4 5 6 7
CZ41 CON7
1 2 3
CB42 CON3
1 2 3
CZ42 CON3
1 2 3
CB411 CON3
1 2 3
CZ411 CON3
F45 500mA/250V
R440 2K2
+18V
6.3A/250V X3
C320BEE ISC CIRCUIT
BCE
2SC5200 2SA1943
ECB
2SA970
2SC2240 2SA1015 2SC1815
TEXT
TEXT TEXT
ECB
2SB649 2SD669
1 2 3 45
6 7 8
OUT A
-IN A
+IN A
V-
V+ OUT B -IN B +IN B
TL082D
IN OUTGND
LM7805
UPC1237
12345678
TIC116D
AKG

2SK369
GDS 12345678 123456789
1:
GND
+18V
-18V
LOUT
ROUT
RIN-
RIN+
LIN+
LIN-
2:
3:
4:
5:
6:
7:
8:
9:
PRE-AMP MODULE
MAIN POT
ALPS RK16812MG
DISC
CD
VIDEO
AUX
TUNER
TAPE2
REC1
TAPE1
REC2
R31
470
R33
470
R35
470
C31
100p
C33
100p
C35
100p
R37
470
R39
470
R311
470
C37
100p
C39
100p
C311
100p
R313
470
R315
470
R317
470
C313
100p
C315
100p
C317
100p C319
0.1u 10%
C324
47u/25
C323
47u/25
C325
47u/25
R321
3K3 MF
R323
750 MF
R319
N.I.
R325
390 MF
R327
180 MF
RT31A
10KA
RT32A
10KA
C327
22n 5%
C329
0.1u 5%
R329
1K5 MF
R331
390 MF
C331
0.22u 5%
C333
0.97u 5%
C335
470P
RT33A
20KB
RT34A
20K MN
1
2
3
SW31A
4
5
6
SW31B
L PRE-OUT
Q31
K363
C343
220p
D31
10M
C339
1u/16
RL31A
RL32A
RL33A
RL34A
RL35A
RL36A
RL37A
RL38A
DISC
CD
VIDEO
AUX
TUNER
TAPE2
REC1
TAPE1
REC2
R32
470
R34
470
R36
470
C32
100p
C34
100p
C36
100p
R38
470
R310
470
R312
470
C38
100p
C310
100p
C312
100p
R314
470
R316
470
R318
470
C314
100p
C316
100p
C318
100p
RL31B
RL32B
RL33B
RL34B
RL35B
RL36B
RL37B
RL38B
TONE DEFEAT SW
R333
4.7K
R335
68
C341
47u/25
C320 0.1u 10%
C326
47u/25
R322
3K3 MF
R324
750 MF
R320
N.I.
R326
390 MF
R328
180 MF
RT31B
10KA
RT32B
10KA
C328
22n 5%
C330
0.1u 5%
R330
1K5 MF
R332
390 MF
C332
0.22u 5%
C334
0.97u 5%
C336
470P
RT33B
20KB
RT34B
20K MN
R PRE-OUT
Q32
K363
C344
220p
D32
10M
C340
1u/16
TONE DEFEAT SW
R334
4.7K
R336
68
C342
47u/25
R513
1K
R58
10K
R511
10K
R59
1K
R512
1K
R510
1K
C55
4u7/25V
C56
4u7/25V
Q56
C1815
Q55
A1015
Q58
C1815
Q57
A1015
M
RL31C RL32C RL33C RL34C RL35C RL36CRL37C RL38C
D37
1N4148
D38
1N4148
D39
1N4148
D310
1N4148
D311
1N4148
D312
1N4148
D313
1N4148
VOLUME CONROL
MOTOR
BY MOTOR
BY MOTOR
R359
5K1 MF
R360 5K1 MF
R348
100K
R347
100K
R341
1M
R342
1M
R343
1M
R339
1M
R338
1M
R337
1M
R346
220K
R345
220K
R349
1M
R351
1M
R353
1M
R355
1M
R357
1M
R350
1M
R352
1M
R354
1M
R356
1M
R358
1M
1
2
3
4
5
6
7
8
CB34
1
2
3
4
5
6
7
8
9
10
CB31
R493
0
1
2
3
4
5
6
7
8
9
CB32
LOW NOISE AMP MODULE
1
2
3
4
5
6
7
8
9
CB33
LOW NOISE AMP MODULE
MF
MF
R1
100
C1
10n
TO CHASSIS
TO THE CHASSIS
C6
10n
R3 100
P8
ON
OFF
OFF
ON
TO CZ52
TO CZ51
L-CH INPUTSR-CH INPUTS
VOLUME POT
VOLUME POT
BALANCE POT
BALANCE POT
BASS POT BASS POT
TREBLE POTTREBLE POT
SOFT IND.
CD
VIDEO
TUNER
AUX
TAP2
TAP1
DISC
REMOTE MUTE
PROTECTION
+5V
VOL-
VOL+
+12V
IRIN
IROUT
63V
63V
63V
63V
63V
63V
63V
63V
63V
63V
+5.6V
DISC CD VIDEO AUX TUNER
TAP2 TAP1
+12V
Pre Mute
-18V
+18V
+5.6V
Soft Ind
Remote Mute
Protection
-18V
+18V
+18V
-18V
+5.6V
+18V
-18V
PHONE1B
IR OUT
PHONE1A
IR IN
C337
0.1U
C345
0.1U
C338
0.1U C346
0.1U
C321
0.1U
C322
0.1U
PHONE2
+12V Trigger
R2
10 C3
0.1uF
+12V
Standby
STANDBY
C320BEE INPUT SELECT CIRCUIT ON THE MAIN BOARD
C320BEE TONE CONTROL CIRCUIT
RI1
1K
QI1
2SC1815
RI2
1K
QI2
2SA1015
RI3
33
+5V
J117
+5V
C302
220p
C301
10uF/50V

Preliminary
STR 1
D2
CLK 3
OE 15
Q1
4Q2
5Q3
6Q4
7Q5
14 Q6
13 Q7
12 Q8
11
QS
9QS
10
IC54 4094
STR 1
D2
CLK 3
OE 15
Q1
4Q2
5Q3
6Q4
7Q5
14 Q6
13 Q7
12 Q8
11
QS
9QS
10
IC55 4094
C59 22p C510
22p
Y51 12MHz
C57 10n
C58
0.1u 20%
+5V
C511 0.1u 20%
+5V
C
VI
TU
AU
T2
T1
P21 P22
P00 P01 P02
P20
DI
S51 VIDEO S52 AUX
S54 TAPE2
S53 CD
S55 TAPE1
S57 DISC
S56 TUNER
D51
VIDEO
D52 AUX
D53 CD
D54 TAPE2
D56
TUNER
D55
TAPE1
D57 DISC
R528 4K7
R529 10K
R526 2K2
R527 2K2
SOFT IND.
LD41 GREEN
R426 910
Q516 C1815
R533
5K1
C51
100u/16V
Q51 A1015
D59 6V8
P24
1
P25
2
P26
3
P27
4
VCC
5
X2
6
X1
7
P31
8
P32
9P33 10
P00 11 P01 12 P02 13
GND 14
P20 15 P21 16 P22 17 P23 18
IC53
MICOM
2
3
1
IC52
IS1U60L
1 2 3 4 5 6 7 8
CZ51
1 2 3 4 5 6 7 8 9 10
CZ52
R530
15K
Q52
C1815
R52 470
R51 680
Q59 C1815
Q510 C1815
Q511 C1815
Q512 C1815
Q513 C1815
Q514 C1815
Q515 C1815
R541
4K7
R542
4K7
R543
4K7
R544
4K7
R545
4K7
R546
4K7 R547
4K7
C514 10n
C515 10n
C516 10n
C517 10n
C518 10n
C519 10n
C520 10n
CVITUAUT2 T1DI
CD VIDEO TUNER AUX TAP2 TAP1DISC
CD VIDEO TUNER AUX TAP2 TAP1 DISC
R554
4K7
R553
4K7
R552
4K7
R551
4K7
R550
4K7
R549
4K7
R548
4K7
NAD C 320BEE KEY BOARD
LD42
RED GREEN
R556 10K
R557 10K
R558
10K
+5V
IR RECEIVER
V
S
G
AMBER
REMOTE MUTE PROTECTION GND VCC VOL- VOL+ +12V
+5V
+5V
+5V
REMOTE MUTE
PROTECTION
VOL+
VOL-
SOFT IND.
+12V
VCC
POWER/PROTECTION IND.
SOFT CLPPING IND.
TO CHASSIS
TO CB31
TO CB34
MUTING BLINK
P9
SHIELDING
VCC V
S G
123
123
CZ43
CB53
Z86C0812PSC
513AW
GREENGREENGREENGREEN GREEN GREEN
W91
W53
W256
N8C320F08 N8C320F06
+5V
Q54
C1815
R501 2K2
Q53 C1815
+12V
Q517
2SC1815
R503 470
+5V
R502 10K
NC
1
NC
2
NC
3
Vss
4SDA 5
SCL 6
NC 7
Vcc 8
IC51 24C01
IR IN IR OUT
IR IN
IR OUT
C52 0.1uF
+5V
+12V
+12V
+12V
R508 10K
D514 1N4148
C8 220p BACKUP N.I.
C61 220p
R61 220 R63
1M
Q61 2SK369 R65 560 2% R67 1K
R69 430 2%
Q63 A970
Q67 D667
C63 15p
R611 1K
Q64 B647
R613 10K
D61
1N4148
D62
1N4148
R615 33
C65 0.1u 20%
C66
0.1u 20%
C69 100p
R617
10
R619
10
C62 220p
R62 220
R64
1M
Q62 2SK369
R66 560 2% R68
1K
R610 430 2%
Q65 A970
Q68 D667
C64 15p
R612 1K
Q66 B647
R614 10K
D63
1N4148
D64
1N4148
R616 33
C67
0.1u 20%
C68
0.1u 20%
C610
100p
R618
10
R620 10
1 2 3 4 5 6 7 8 9
J61
R621
120
C611 40P LINEIN MODULE
GND
+18V
-18V LOUT ROUT RIN- RIN+ LIN+ LIN-
PORT2/0 PORT2/1 PORT2/2 PORT2/3PORT2/4
PORT2/5 PORT2/6 PORT2/7 VCC XTAL2 XTAL1 PORT3/1 PORT3/2 PORT3/3
PORT0/0 PORT0/1 PORT0/2
GND
1 2 3 4 5 6 7 8 910
11 12 13 14 15 16 17 18
Z86C0812PSCIC53:
D510 1N4148 D511 1N4148 D513 1N4148
D512 1N4148+5V
+5V
R53 10K
R514 10
C550 0.1uF
R515 10
C551 0.1uF
R516 10
C552 0.1uF
C512 0.1u 20%
D515 1N4148
TO THE CHASIS TO THE CHASIS TO THE CHASIS
NOTE: R514 R515 R516 AND C550 C551 C552
ARE NOT INSERTED IN AH VERSION
C320BEE PREAMP MODULE
15P LINEOUT MOULE
STR
D CLK Q1 Q2 Q3 Q4
Q5 Q6
Q7
Q8 QS QS
OE
GND
VCC
IC54 IC55: CD4094
IC51: 24C01
NC NC NC
NC
VCC
SCL SDAGND
ECB
2SA1015 2SC1815TEXT 2SK369
GDS
2SD667 2SB647 TEXT:
1: SIGNAL 2: GND 3: VCC IS1U60L 513AW
123 1 2 3
1: RED INDICATOR 2: COMMON CATHODE 3: GREEN INDICATOR