NAD C 272 User manual

NAD
SERVICE MANUAL
C 272
STEREO
AMPLIFIER
C 272 STEREO AMPLIFIER

SPECIFICATIONS
STEREO MODE
CONTINUOUS AVERAGE POWER =150 W (21.8 dBW)
OUTPUT INTO 8 OHMS OR 4 OHMS
(Min. power per channel, 20 Hz –20 kHz, both
channels driven, with no more than rated
distortion)
Rated Distortion =0.03%
(THD 20 Hz –20 kHz)
Clipping power =170 W
(maximum continuous power per channel).
IHF dynamic headroom at 8 ohms =+2.3dB
IHF dynamic power
(Maximum short term power per channel) 8 ohms: =230 W (23.6dBW)
4 ohms: =410 W (26.1dBW)
2 ohms: =520 W (27.2dBW)
Damping factor >150
(ref. 8 ohms 50Hz)
Input Impedance R = 20 kohms
C = 470 pF
Input sensitivity (for rated output into 8 ohms) 1.2V±0.1V
Voltage gain 29 dB
Frequency response 20 Hz –20 kHz ±0.3 dB
-3 dB at 3 Hz/70 kHz
Signal / Noise ratio, A-weighted >100 dB ref. 1 W
>120 dB ref. rated power
BRIDGED （MONOPHONIC）MODE
CONTINUOUS AVERAGE POWER 330 W25.2 dBW）
OUTPUT INTO 8 OHMS
(Min. power per channel, with no more than rated distortion)
IHF dynamic headroom at 8 ohms 3 dB
IHF dynamic power 8 ohms: 800 W (29.0dBW)
IHF dynamic power 4 ohms: 1200 W (30.8dBW)
DIMENSIONS AND WEIGHTS
Net Weight 12.5kg ( 27.5 Ib)
Shipping Weight 14.2 kg ( 31.3 Ib)
Dimension (W ×H ×D) 435 ×133×350 mm
2

ALIGNMENT PROCEDURE (C272)
I. INITIAL ADJUSTMENT (No load connected)
A. OUTPUT OFFSET VOLTAGE
1. Connect a DC Millivoltmeter to L Channel TP2 (DC) and TP8 (GND).
2. Turn unit “ON” and adjust VR301 (100ohms) to get a reading of 0V+/-30mV.
3. Connect a DC Millivoltmeter to R Channel TP5 (DC) and TP7, then adjust
VR401(100ohms) to get a reading of 0V+/-30mV reading on meter.
B. IDLING CURRENT
1. Connect a DC Millivoltmeter to L Channel TP1 (IDL) and TP3 (IDL), then adjust
VR302 (500 ohms) for 6~7.5mV reading on meter.
2. Connect a DC Millivoltmeter to R Channel TP4 (IDL) and TP6 (IDL), then adjust
VR402 (500 ohms) for 6~7.5mV reading on meter.
II. ISC ADJUSTMENT (WITH LOAD CONNECTED)
1. Connect a DC Millivoltmeter to Power Board CB725, and connect 4 ohms load to
both L&R speaker output terminals. Then feed 20kHz signal to Fixed In RCA.
2. Turn unit ”ON” and try to get 15W on speaker output terminal. Then adjust VR701
(82kohms) to get a reading of 0V+/-10mV.
3. Change the load to 8 ohms and try to get 160W on speaker output terminals.
Then adjust VR701 (82kohms) to get a reading of 1.4V+/-30mV.
III. FINAL ADJUSTMENT
Repeat procedure A and B for offset voltage and idling current alignment respectively.
3

4

DRAFT
C702
22n/250V
C703
22n/250V
C715 C716
Q703
C1815
Q702
A1015
TC701
TIC116D
TC702
TIC116D
R707
1K
R713 22K
R709
100
R711 1K
R712
1K
R708
1K
R710
100
R714
22K
R716
0.025/3W 10%
R717 100
MF 1%
Q706
A1015
Q707
A1015
R718
9K1
MF 1%
R719 220K
!
!
!
!
RED GRY BLK
ORG
VIO
!
!
!
!
H1 H2
L1 L2
52.1V AC
10%
10%
33.1V AC
C704
22n/100V
C705
22n/250V
!
10% 10%
32.5V AC
C711
22n/250V
C712
22n/250V
R701 R702 R703 R704
C721
22n/100V
C722
22n/100V
C723
1000u/100V
C724
1000u/100V
R721
1K
R722 1K
R723 33/FS R726
1K
R725
1K
R727
1K
R730 1K
R728
1K
R735
3K3
1%MF
R732
1K
R731
1K8
R734 9K1 1%MF
R724 33/FS
R733
1K
R737
22K 1%MF
C728
100u/25V
C732
10u/100V
C733 4u7/100V
C729
100u/25V
C737
22u/100V
C734
22n
100V
C731
47P
C730
47P
C735
22n
100V
Q708
KSC2690
Q710
C1775
Q711
C1775
Q709
KSA1220
Q712 A872
D703
1N4148
D704
1N4148
D706
1N4148
D705
1N4148
C725
47u100V
C726
47u/100V
R736 22K 1%MF
C736
22u/100V
! ! !
60.5V AC
T701: TI-65381: AC 230V
AC S1 AC S2
+
+
-
-
B703 DB104
AC S1 AC S2
+
+
-
-
B704 DB104
AC S1 AC S2
+
+
-
-
B701 KBU1004
AC S1 AC S2
+
+
-
-
B702 KBU1004
C713
22n/250V
C714
22n/250V
D702
1N5401
10A10A
0.5A0.5A
Q704
A1015
Q705
C1815
R715
22K
C717 C718
C719
N.I.
C720
N.I.
1 2
3 4 7 8 9 5 6
10 11 12
T701
MAIN TRANSFORMER
1 2 3 4 5
CZ702
5PIN
1 2 3 4 5
CB702
5PIN
1 2 3 4 5
CZ701
5PIN
1 2 3 4 5
CB701
5PIN
R720 100
R729
100
C727 0.1u
FUSEABLE : 4 X 1/1W
AC-DET
ISC-C ISC-S
4X10000uF/80V +20%/-20% C715--C718
+18V
R742
249
R743
249
R740 3K32 R741 3K32
C744
22u/50V
C745
22u/50V
C746
22n 100V
C747
22n 100V
IN IC702
LM317M
IN
IC703 LM337M
C740
22n 100V
C741
22n 100V
+18V
-18V
C738
2200uF/50V
C739
2200uF/50V
C742
10u/50V
C743
10u/50V
D707 1N4148 D708 1N4148
1 2
CB703
2PIN
C706 0.1u
!
AC S1 AC S2
+
+
-
-
B705 DB104
C708
1000u/16V
C707
0.1u
R706 10K
1 4 56
7 9
10
2
8
T702
STANDBY TRANSFORMER
PJ701
+12V TRIG
R705
2K2
Q701 C1815
1 2 3
SW702A
AUTO TRIG
12
RL701A
STAND-BY
RL701B
5V
D701
1N4148
IN
IC701 7805
C710
0.1u
C709 10uF
TGND
1 2 3 4
CZ706
4PIN
1 2 3 4
CZ706A
4PIN
1 2
CZ703
2PIN
F701
T4AL/250V(CE)
R738
200/1W FS
R739
200/1W FS
R740--R743=>1% MF
YEL BLU WHI
BLU
YEL
1 2
CZ704
2PIN
+T5V
+T5V
TGND
R749
10K
D710
1N4148
R758
100K 1% MF
R759 91K
1% MF
R757 62K
1% MF
R756 390K
1% MF
C753
10u/25V
R754
1K
C750
10u/25V
R755
1K
C751
10u/25V
IC704A
TL082CP
C752
10u/25V
R751 1M
IC704B TL082CP
R745 27K MF
R752 1M
C748
1u/50V
C749
1u/50V
R750
10K
D711
1N4148
R746
270K 1% MF
D712
1N4148
R748 100K
R753 100K
1% MF
-18V
D709
1N4148
-18V
+18V
ISC-S ISC-C
R772
56K
R773
56K
C758
330u/16V
C756 4u7/100V
C757
220n/63V
R764 10K
R769 56K
C755
47u/50V
1 2
3
4
5
6
7
8
IC705
uPC1237HA
+V34
R771 22K R770 22K
D719 1N4148
D718 10V
Q715
A1015
C754
10u/50V
R762 22K
R763 10K
R765 10K
R768
10K
D713
1N4148
RL702B
36V
R766
220/2W FP
L-OUT
R-OUT
R767
5K6
+V34
PROTECT-I
PT-OUT AC-DET
+5V
1 2
CB707
2PIN
1 2
CB708
2PIN
LA G1 G2 RA
LB
G3 G4 RB
CB715 BINDING POSTS
1 2
RL702A RL-LCH
1 2
RL703A RL-RCH
1 2 3 4 5 6 7 8
CZ709A
8PIN
1 2 3 4 5 6 7 8
CZ710A
8PIN
C759
22n
100V
C760
22n
100V
C761
2n2
C762
2n2
L-OUT
R-OUT
+64V
-64V
1 2 3
SW704A
BG-SIGNAL
PROTECT-I
1 2 3
SW703A SOFTCLIP
10 11 12
SW704D BRIDGE
1 2 3
CZ711
3PIN
+18V
R779 10K
R777
10K
R774
4K7
D722 1N4148
D721
1N4148
D720
1N4148
R775
560
R778 4K7
R776
0
Q716 C1815
Q717 C1815
1 2 3CZ712
3PIN
+18V
+18V
PT-OUT
4
5
6
SW702B AUTO TRIG
+5V
Q714 C1815
Q713
C1815
R761 22K
R760 22K
PROTECT-T
PROTECT-T
ISC-C
R783 25K
R782 25K
R785 1K R784 1K
R781 1K R780 1K
+68V
-68V
C764
10u/25V
C763
10u/25V
D71424V
D715 24V
4 5 6
SW703B
SOFTCLIP
+64V
-64V
+18V
+68V
-68V
R744
100
Q718
C1815
R786
22K
D716
1N4148
+18V
-18V
C270 STANDBY BOARD
LOUT
GND
+64V
-64V -64V
+64V
GND
ROUT
MUTE-L
MUTE-R POS90
POS90 POS80
POS80
SC-P SC-P SC-N SC-N
OVERI-S
OVERI-S
-68V -68V
+68V +68V BG-O
BG-S 1
2
CZ714A
2PIN
BG-G
4 5 6
SW704B BG-GND
1 2
CZ713A
2PIN
LIN
GND
1
2
3
4
5
6
7
8
9
CZ61
9PIN
R612
1K
C62
100P
R62
220 MF
R64
2.2M
MF
Q62
2SK369
R68
1K MF
R610
100/MF
Q65
2SA970A
Q68 2SD667A
Q66
2SB647A
D63
1N4148
D64
1N4148
C64 39P
R620 10/MF
C68 0.1u C67 0.1u
MGND
1
2
3
4
5
6
7
8
9
CB61
9PIN
MLO
+18V
LOUT
LIN-
LIN+
GND
RIN+
RIN-
ROUT
-18V
R618
47/MF
R616
0
R614
10K
MGND
+18M
-18M MGND
MLO MRO
R621
N.I.
C611
N.I.
MR-FB
C270-INPUT BUFFER
R66
N.I.
1% MF
C610
47P
R611 1K
C61 100P
R61
220 MF
R63 2.2M MF
Q61 2SK369
R67
1K MF
R69
100/MF
Q63
2SA970A
Q67
2SD667A
Q64
2SB647A
D61
1N4148
D62
1N4148
C63 39P
R619 10/MF
C66
0.1u
C65 0.1u
MGND
MRO
R617 47/MF R615
0
R613 10K
MGND
+18M
R65 N.I. 1% MF
C69 47P
MR-FB
-18M
ML-FB
ML-FB
-18M
RIN
GND
2SA1943 BCE
2SA1943
2SA872
2SA1015 2SC1815
A872
ECB
B649
TL431
LM317:
RAK
ECB
TL431
2SB649 2SD669
3:IN
LM337:
1:ADJUST,2:IN,
123
LM7805
LM7805 1:IN
2:GND,3:OUT
2SC5200
R101
220 MF
C101 100P
R102
2M2
RCA1A
FIXED-L
R201
220 MF
C201 100P
R202
2M2
RCA1B
FIXED-R
1 2 3
SW705A
F/V SW
4 5 6
SW705B
F/V SW
R103
220 MF
C102 100P
R104
2M2
RCA2A
VARI-L
R203
220 MF
C202 100P
R204
2M2
RCA2B VARI-R
A1
RV1A
1K
A2
RV1B
1K
R105
0
R205
0
C103 10n
63V
C203 10n
63V
C104 100uF
C204 100uF
1 2 3
CZ301A
3PIN
1 2 3
CZ401A
3PIN
+18V -18VC105
10uF
C205 10uF
7 8 9
SW705C
F/V SW
10 11 12
SW705D
F/V SW
BUF-R
BUF-R
123
LM317
LM337
1:ADJUST,2:OUT, 3:OUT
2.5Vref
+ -
Reference(R)
Cathode (K)
Anode (A)
1
2
3
KSC2690
TL431
B647
ECB
2SB647A 2SD667A
C613 0.22u
C612 0.22u
C765
22u/50V
R5 0
R6 0C5
N.I.
C6 N.I.
P15 LOUT P16 SGND P7-64V P9 PGND P11 +64V P13 LOUT
+64V
-64V
P17 ROUT P18 SGND P8-64V P10 PGND P12 +64V P14 ROUT
C766
4n7/400V
GND
KAG
TIC116D
TIC116D
2SA970
GND GND
C767
10u/25V
D723
1N4148
R788 100K
1% MF
R-OUT
L-OUT
D724
1N4148
R789
270K 1% MF
RL703B
36V
R790 2K2
+18V
!
R791 100K
R792 2K
R793 560
C407
22P/500V
C402 220P
C405
22P/500V
C415 0.1u
R402 22K
R403
100 MF
R412
100
R404 100
R413 39K
R405 39K
R414 100 R406 100
Q413 2SB649A
Q410
2SB649A
Q409
2SA1015
Q405
2SA1015
Q407
2SA872
Q406
2SA872
Q401
2SA872
Q411
2SD669A
Q412 2SC1815
Q408
2SC1815
Q404
2SC1775
Q403
2SC1775
Q402 2SC1775
R408
33
R420
33
R418
47K
1%MF
R459 10/1W FS R460 3R3/1W FP
R415
1K
R423
100 MF 1%
R421
1K MF 1%
R417
150 1%
R419
10K
0.5W 1%MF R427
39K
R407
910 MF 1%
R416
10K
R428
100 MF
R411
1K
R410
10K
R426 100K
R424 100K
R409
100 MF 1% D403
1N4148
D404
1N4148
D406
1N4148
D405
1N4148
C408 100P
Q414 2SD669A
R430 3R3 1W FP R432 510 1W FP
R434 2K2 3W FP
R438 3R3 1W FP
R441 510 1W FP
R444
2K2 3W FP
R437 100
1W FS
R429 100
1W FS
R431
4R7 FS
R439
4R7 FS
R436 33
R440 33 L401 10uH L402 10uH
R445
1K2
R446
820
Q415 KSC2690
Q417
2SC4937
Q422
2SC5200
Q420
2SC5200
Q418
2SA1837
R450
0.2
1W FS
R452
0.2
1W FS
R451
0.2
1W FS
R453
0.2
1W FS
R457
0.05 5W
R456 0.05 5W
R448
75
1W FP
R449
75
1W FP
R442 10K
R433 10K
C413 470P 500V C414
470P 500V
Q419
2SA1943
Q421
2SA1943
D408
BAV21
D407
BAV21
C418
0.1u
100V
L403 1uH
R401
470/MF
R-FDBK
C401 10uF
C403
10uF/25V
C404
10uF/25V
C406
2200u/6.3V
C411
100uF
C412
100u/25V
R435 10K
R443 10K
C416 0.1u 100V
C417 0.1u 100V
C409
0.1u
100V
C410
0.1u 100V
Q426
2SA1015
Q425 C1815
R464 6K8
C421
10u 50V
R463 22K
R461
1K
R462 15K
C420
22n 100V
D409
1N4148
R465
22K
R454
0.2
1W FS
Q423
2SA1943
Q424
2SC5200
R455
0.2
1W FS
R422 9K1
0.5W 1%MF
1 2
CZ401 2PIN
1
VR401
180
R466
t=90 C
R467
t=80 C
RSCN
R-FDBK
D402
18V
D401
18V
IC402 TL431
IC401
TL431
1
VR402 500
R447
220
Q416
A1015
TP4 IDLING-I TP5
OFFSET
TP6 IDLING-I
R468
0.2
1W FS
Q427
2SA1943
Q428
2SC5200
R469
0.2
1W FS
-V64R +V64R
1 2
CZ708
2PIN
1 2 3 4 5 6 7 8
CZ710
8PIN
-64V
+64V
GND ROUT MUTE-R POS90 POS80 SC-P SC-N OVERI-S -68V
+68V
GND BG-S
RSCN RSCP
R-MU
Q429
2SC1775
Q430
2SA872
-V68R
+V68R
R425 100
R470 100
RSCP
+V68R
-V68R
+V64R -V64R
R471 2K2
R-MU
R472 8K2
R358
100/0.5W MF
1 2 3
CZ714
3PIN
BG-GBG-G
BG-S
BG-S
BG-G
C307
22P/500V
C302 220P
C305
22P/500V
C315 0.1u
R302 22K
R303
100 MF
R312
100
R304 100
R313 39K
R305 39K
R314 100 R306 100
Q313 2SB649A
Q310
2SB649A
Q309
2SA1015
Q305
2SA1015
Q307
2SA872
Q306
2SA872
Q301
2SA872
Q311
2SD669A
Q312 2SC1815
Q308
2SC1815
Q304
2SC1775
Q303
2SC1775
Q302 2SC1775
R308
33
R320
33
R318
47K 1%MF
R359 10/1W FS R360 3R3/1W FP
R315
1K
R323
100 MF 1%
R321
1K MF 1%
R317
150 1%
R319
10K 0.5W 1%MF R327
39K
R307
910 MF 1%
R316
10K
R328
100 MF
R311
1K
R310
10K
R326 100K
R324 100K
R309
100 MF 1% D303
1N4148
D304
1N4148
D306
1N4148
D305
1N4148
C308 100P
Q314 2SD669A
R330 3R3 1W FP R332 510 1W FP
R334 2K2 3W FP
R338 3R3 1W FP
R341 510 1W FP
R344
2K2 3W FP
R337 100
1W FS
R329 100
1W FS
R331
4R7/FS
R339
4R7/FS
R336 33
R340 33 L301 10uH L302 10uH
R345
1K2
R346
820
Q315 KSC2690
Q317
2SC4793
Q322
2SC5200
Q320
2SC5200
Q318
2SA1837
R350
0.2
1W FS
R352
0.2
1W FS
R351
0.2
1W FS
R353
0.2
1W FS
R357
0.05 5W
R356 0.05 5W
R348
75
1W FP
R349
75
1W FP
R342 10K
R333 10K
C313 470P
500V
C314
470P 500V
Q319
2SA1943
Q321
2SA1943
D308
BAV21
D307
BAV21
C318
0.1u
100V
L303 1uH
R301
470/MF
L-FDBK
C301 10uF
C303
10UF/25V
C304
10uF/25V
C306
2200u/6.3V
C311
100uF
C312
100u/25V
R335 10K
R343 10K
C316 0.1u 100V
C317 0.1u 100V
C309
0.1u
100V
C310
0.1u 100V
Q326
2SA1015
Q325 C1815
R364 6K8
C321
10u 50V
R363 22K
R361
1K
R362 15K
C320
22n 100V
D309
1N4148
R365
22K
R354
0.2
1W FS
Q323
2SA1943
Q324
2SC5200
R355
0.2
1W FS
R458 8K2
R322 9K1
0.5W 1%MF
1 2
CZ301
2PIN
1
VR301
180
R366
t=90 C
R367
t=80 C
LSCN
L-FDBK
D302
18V
D301
18V
IC302 TL431
IC301
TL431
1
VR302 500
R347
220
Q316
A1015
TP1 IDLING-I TP2
OFFSET
TP3 IDLING-I
R368
0.2
1W FS
Q327
2SA1943
Q328
2SC5200
R369
0.2
1W FS
-V64L +V64L
1 2
CZ707
2PIN
1 2 3 4 5 6 7 8
CZ709
8PIN
-64V
+64V
LOUT MUTE-L POS90 POS80 SC-P SC-N OVERI-S -68V
+68V
BG-O
LSCN
LSCP L-MU
Q329
2SC1775
Q330
2SA872
-V68L
+V68L
R325 100 R370 100
LSCP
+V68L
-V68L
+V64L -V64L
R371 2K2
L-MU
1 2
CZ713
2PIN
GND GND
C322 10u/100V C319 10u/100V C422 10u/100V C419 10u/100V
TP8 GND TP7 GND
C323
0.1u
100V
C423
0.1u 100V
Q431 C2878 1%
1%
R797 10K
B-
B-
1
2
CB716 M-TEST
1
2
CB717 M+TEST
1
VR701 82K
R-OUT
L-OUT
1 2
CZ718
2PIN
1 2
CZ719
2PIN
1 2
CB719
2PIN
1 2
CB718
2PIN
1 2 3
CB720
68VTEST
+68V
-68V
1 2 3
CB723
18VTEST
+18V
-18V
T6.3AL/250V(AH)
1
2
3
CB724
N/A
TGND
1 2
CB725 PTEST
7 8 9
SW704C BRIDGE
1 2
CZ705
2PIN
GND ROUT
1 2
CB705
2PIN
R747 470K
-18V
NOTE: 1. RESISTORS ARE CARBON FILM 1/4W 5% UNLESS SPECIFIED. FP - FLAME PROOF 5%. FS-FUSIBLE 5% MF - METAL FILM 5%. CE-CERAMIC CASE 5% 2. ALL CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V, 20% 3. COMPONENTS WITH "N.I." MEANS "NOT INSERT". 4. COMPONENTS WITH " * " ARE ADJUSTABLE PARTS. 5. COMPONENTS WITH " " ARE SAFETY CRITICAL PARTS.
!
1 2 3 4 5
CZ705
230V 120V
C272
NAD ELECTRONICS INTERNATIONAL
Document Sheet: Date: Date: Date:
Drafted PL Checked Approved
by: by: by: Number:
REV. DateECN No. DESCRIPTION APPRO.
Project: State:
PTA Checked by: Date:
HS4_C272_B007 V3.0-MAIN.sch
TRIG OFF
R799 2.2K
CHANGE R744 TO 100
ADD R799 1/4W 2K
5

DRAFT
CIN
11
COUT 9
COUT 10
RST
12 Q4 7
Q5 5
Q6 4
Q7 6
Q8 14
Q9 13
Q10 15
Q12 1
Q13 2
Q14 3 VCC
16
GND
8
U801
CD4060 CLK
11
D
12
SD 10
CD
13
Q9
Q8
U803B
74HC74
CLK
3
D
2
SD 4
CD
1
Q5
Q6
714
U803A
74HC74
89
U802D
74HC14
1011
U802E
74HC14
1 2
714
U802A
74HC14
3 4
U802B
74HC14
5 6
U802C
74HC14
1213
U802F
74HC14
R802
10K
Q801
2SC1815
R803
10K
R804
10K
R810
100K
R814
200K
R801
2M
R805
10K
R806
10K
R807
10K
R813
1M
R811
100K
R808
10K
R809
10K
R816
10K
R815
10K
R817
10K
R819
10K
R818
10K
Q802
2SC1815
Q803
2SC1815
C803
0.1uF
C807
2.2uF
C806
0.1uF
D801
1N4148
R812
1M
C802
0.1uF
+5V
+5V
+5V
+5V
+5V
+5V
C801
0.1uF
C805
0.1uF
C804
0.1uF
1 2 3 4 5 6
CZ804
6PIN
1
2
3
CZ801
3PIN
+5V
1
2
3
4
CZ802
4PIN
1
2
3
4
CZ803
4PIN
+5V
OUTPUT
IN SENSE
TRIG IN
3
12
Q804
2SA1015
HS4_C272_B007 V4.0-ATO.SCH
C272
R901
1M
R902
1M
R910
10K
R907
30M
R909
10K
R911
1M
C906
10pF
C904
100nF
C909
0.1uF
12
D903
1N4148
1 2
D904
1N4148
12
D905
1N4148
1 2
D906
1N4148
1 2
D901
1N4148
12 D907
1N4148
12
D911
1N4148
+5V
+5V
+5V
C901
100nF
C903
100nF
C905
100nF
C902
100nF
R908
30M
C907
10pF
12
D908
1N4148
1 2
D909
1N4148
12
D910
1N4148
1 2
D912
1N4148
1 2
D902
1N4148
12 D913
1N4148
R906
100K
R903
100K
R905
100K
R904
100K
3
2
1
8 4
U901A
LF353
5
6
7
U901B
LF353
12
C908
100nF
1
2
3
CZ901
3PIN
1
2
3
CZ902
3PIN
S_LCH
S_RCH
1
2
3
CZ903
3PIN
1
3
4
2
5
6
S901
Q901
2SC1815GR
R913
100k
R912
100k
+5V
12
C910
100n
1
2
3
3PIN
1
2
3
3PIN
1 2 3 4 5 6
6PIN
R1101
0
R1102
47
LED1106
LED1105
R1105
1K
R1104
1K
SC
BG
+18V
AGND
LED1104LED1103LED1102
Q1103
2SA1015
Q1102
2SA1015
Q1101
2SA1015
R1103
510
TS1101
GND +5V TS
LED_SENSE LED_TRIG LED_TS
GREEN
GREEN GREEN GREEN
AMBER
GREEN/AMBER/RED
INSENSE BORAD
ATO BORAD
TACT SWITCH&LED BORAD
LED1101
PWR
TO MAIN BOARD CZ712
TO MAIN BOARD CZ711
TO STANDBY BOARD CZ706
TO MAIN BOARD CZ706A
1
2
3
CB901
3PIN
1
2
3
CB902
3PIN
TO MAIN BOARD CZ61 PIN4
TO MAIN BOARD CZ61 PIN6
1
2
3
CB903
3PIN
1
2
3
CB903A
3PIN
P1001
AC INLET
1
2
CZ1001
2PIN
12
C1001
4.7nF1000V
1
2
CB1001
2PIN
1
2
3
CB1101A
3PIN
1
2
3
CB1102A
3PIN
1 2
CB1001A
2PIN
1
2
3
4
CB802
4PIN
1
2
3
4
CB803
4PIN
1 2 3 4 5 6
CB804
6PIN
1 2 3 4
CB803A
4PIN
1 2 3 4
CB802A
4PIN
TO STANDBY BOARD CZ704
AC INPUT BOARD
TO STANDBY BOARD CZ705
1 2 3
CZ1002
2PIN
1 2 3
CB1002
2PIN
12
C912
220uF/16V
R914
10K
12
C911
220uF/16V
ADD R914,C808,C911,C912
12
C808
220uF/16V
1 2 3
CZ1003
2PIN
1 2 3
CB1003
2PIN
1 2 3 4 5
CB705
5PIN
S1001
ROCK SWITCH
1 2 3
CB1002
2PIN
1 2 3 4 5
CB705
5PIN
(AH VER.) (C VER.)
TO MAIN BOARD CZ61 PIN5
TO MAIN BOARD CZ61 PIN5
PN U1 CHANGED TO U801
NAD ELECTRONICS INTERNATIONAL
Document Sheet:
Date: Date: Date:
Drafted PL Checked Approved
by: by: by:
Number:
REV. DateECN No. DESCRIPTION APPRO.
Project: State:
PTA Checked
by:
Date:
C809
0.1uF100V
ADD 0.1uF CAP FROM TRIG IN TO GND
R819 CHANGED TO 10KC022V1-013 03-12-10V3.7
6

WIRING DIAGRAM
7

F001
F002
F003
F004
F005
F006 F007
F008
F009
C001
C002
C003
C004
C005
C006
C007 R002
R003
R001
C008
C016
C010
C009
C011
C012
C015 C014
C013
C017
C018
R006
R004
C020
C021
C022
C019
C023
C024
C025
C026
C027
C028
C029
C030 C031
C032
C033
C034
C035
C036
C037
C038
C039
T001
C041
S001
S002
S001
S001
S001
S001
S001
S001
S003
S003
S004
S005
S006
S007
S008
S009
S009
S010
S011
C040
S012
S014
S014
S013
S015
S014
S013
S015
S005
S005
S001
S005
S001
S002
S001
S002
S005
R005
EXPLODED VIEW
8

REF.NO PART NO. DESCRIPTION Qty. REF.NO PART NO. DESCRIPTION Qty.
C001 66-026002-1 Chassis 1 F001 67-026001-0 Fascia 1
C002 66-005004-0 Base Cover 1 F002 67-018001-0 End Cap L 1
C003 75-010004-1 Foot 4 F003 67-018002-0 End Cap R 1
C004 78-001002-0 Foot Pad 4 F004 76-003001-0 LED Lens 6
C005 66-005006-0 BDP Support 1 F005 77-026002-0 Power Button Bezel 1
C006 69-006003-0 Copper Slot 1 F006 77-026001-0 Power Button 1
C007 66-006001-0 Bus Bar 2 F007 75-005001-0 Sleeve 5
C008 70-002004-0 Module Support 2 1 F008 16-27209-00 LED&Ttact Switch Board 1
C009 75-003004-0 Module Lid 1 F009 66-026001-0 Subfascia 1
C010 73-003001-0 Rotate Knob 1
C011 69-002004-0 BDP Pin 4
C012 69-005006-0 BDP Pin 4 R001 67-026003-0 Rear Panel (AH) 1
C013 11-05202-01 Slide Swich 2 67-026002-0 Rear Panel (C) 1
C014 11-05202-00 Slide Swich 2 R002 16-27205-00 Insense Board 1
C015 17-07001-00 Trigger In Socket 1 R003 11-05202-00 Slide Switch 1
C016 17-01002-01 RCA 2 R004 66-010010-0 L Type Bracket 2
C017
01-27201-20/10 Main PCB C/AH 1 R005 17-07102-00 AC Inlet 1
C018 Binding Post 8 R006 16-27207-00 AC Input Board 1
C019 70-005005-0 Heat Sink 2 R007 11-01101-02 Rock Swich 1
C020 70-026004-1 Heat Sink 2b 2
C021 70-026005-1 Heat Sink 1a 1
C022 70-026002-1 Heat Sink 2 2 T001 67-018004-0 Top Cover 1
C023 70-026001-1 Heat Sink 1b 2
C024 70-026003-1 Heat Sink 2a 1
C025 85-005001-0 PC Spacer 8 S001 61-023106-0 Self Taping Screw STB3x6 50
C026 16-27020-00 Amplifier PCB 2 S002 61-023108-0 Self Taping Screw STB3x8 22
C027 16-27040-00 Transistor PCB 2 S003 61-023506-0 Machine Screw MB3x6 24
C028 78-005002-0 Insulation Causion(Small) 8 S004 61-023206-0 Self Taping Screw BTB3x6 4
C029 78-005005-0 Insulation Causion(Big) 16 S005 61-023208-0 Self Taping Screw BTB3x8 26
C030 66-005009-0 Tr. Clamper 16 S006 61-033420-0 Self Taping Screw PTP3x20 8
C031 70-004001-0 Small Heat Sink 2 S007 61-084108-0 Self Taping ScrewSTPW4x8 6
C032 70-002005-0 Heat Sink 5 S008 61-023508-0 Machine Screw MB3x8 4
C033 69-005001-0 Copper Spacer 3 S009 62-010302-0 Nut GB6170 M3 6
C034 69-006002-0 Copper Spacer 9 S010 61-083515-0 Machine Screw MPW3x15 2
C035 16-27030-00 Standby PCB 1 S011 61-223514-0 Hex Screw M3x14 16
C036 16-27080-00 Module Board 1 S012 64-110070-0 Bolt GB5781 M10x70 1
C037 67-005010-0 Box 1 S013 63-021030-0 Spring Washer GB93 10 2
C038 18-37371-22 Main Transformer(C version) 1 S014 63-011020-1 Washer GB95 10 3
18-37371-12 Main Transformer(AH version) 1 S015 62-011002-0 Nut GB6170 M10 2
C039 66-005007-0 Metal Disc 1
C040 94-005004-0 Transformer Label 1
C041 66-005008-0 Clamp 2 2
EXPLODED VIEW PARTS LIST
9

ELECTRICAL PARTS LIST
REF. NO. P/N
Power AMP Board L Channel (Assembled AMP PCB 01-27220-01 with heatsink)
AMP Raw PCB 16-27220-01 CEM-1
TRANSISTORS
Q305, Q309, Q326, Q316 31-01015-00 2SA1015GR TO-92 Transistors
Q301, Q306, Q307, Q330 31-00872-00 2SA872A TO-92 Transistors
Q302, Q303, Q304, Q329 31-01775-00 2SC1775A TO-92 Transistors
Q308, Q312, Q325 31-01815-00 2SC1815GR TO-92 Transistors
Q318 31-01837-00 2SA1837 TO-220 Transistors
Q310, Q313 31-01220-00 KSA1220A TO-126 Transistors
Q311, Q314 31-02690-00 KSC2690A TO-126 Transistors
Q315 31-02690-00 KSC2690A TO-126 Transistors
Q317 31-04793-00 2SC4793 TO-220 Transistors
Q319, Q321, Q323, Q327 31-01943-00 2SA1943O TO-3P Transistors
Q320, Q322, Q324, Q328 31-05200-00 2SC5200O TO-3P Transistors
DIODES
D301, D302 33-11800-00 18V/0.5W Zener Diodes
D303, D304, D309 33-44148-02 1N4148 SW Diodes
D305, D306 33-44148-03 1N4148 SW Diodes
D307, D308 33-40021-00 1SS88(or BAV21 [BV>200V]) SW Diode
ICS
IC301, IC302 03-00431-00 TL431 TO-92 Regulator
CAPACTORS
C305, C307 05-22052-00 22pF 500V ±20% Ceramic Disk
C308 05-10151-01 100pF 50V ±20% Ceramic Disk
C302 05-22151-01 220pF 50V ±20% Ceramic Disk
C313, C314 05-47152-00 470pF 500V ±20% Ceramic Disk
C320 25-22312-01 22nF 100V ±10% Metallized Polyster Film
C309, C310, C315, C316,
C317, C318, C323 25-10412-02 0.1uF 100V ±10% Metallized Polyster Film
C306 06-22260-00 2200uF 6.3V ±20% Electrolytic
C301, C303, C304 06-10021-01 10uF 25V ±20% Electrolytic
C312, C311 06-10121-00 100uF 25V ±20% Electrolytic
C321 06-10051-00 10uF 50V ±20% Electrolytic
C319, C322 06-10012-00 10uF 100V ±20% Electrolytic
RESISTOR
R367 07-70471-08 t=80° C Posistor
R366 07-70471-09 t=90° C Posistor
R331, R339 07-50479-00 4.7ohms 1/4W ±5% Fusible
R350, R351, R352, R353,
R354, R355, R368, R369 07-50208-01 0.2ohms 1W ±5% Fusible
R359 07-50100-01 10ohms 1W ±5% Fusible
R337, R329 07-50101-02 100ohms 1W ±5% Fusible
R325 07-10101-00 100ohms 1/6W ±5% Carbon Film
R371 07-10222-00 2.2kohms 1/6W ±5% Carbon Film
R313 07-10393-00 39kohms 1/6W ±5% Carbon Film
R324 07-10104-00 100kohms 1/6W ±5% Carbon Film
R308, R320, R336, R340 07-10330-10 33ohms 1/4W ±5% Carbon Film
R304, R306, R312, R314 07-10101-10 100ohms 1/4W ±5% Carbon Film
R370 07-10101-10 100ohms 1/4W ±5% Carbon Film
R347 07-10221-10 220ohms 1/4W ±5% Carbon Film
R346 07-10821-10 820ohms 1/4W ±5% Carbon Film
R311, R315, R361 07-10102-10 1kohms 1/4W ±5% Carbon Film
R345 07-10122-10 1.2kohms 1/4W ±5% Carbon Film
R364 07-10682-10 6.8kohms 1/4W ±5% Carbon Film
R310, R316, R333, R342,
R343, R335 07-10103-10 10kohms 1/4W ±5% Carbon Film
R362 07-10153-10 15kohms 1/4W ±5% Carbon Film
R302, R363, R365 07-10223-10 22kohms 1/4W ±5% Carbon Film
R305, R327 07-10393-10 39kohms 1/4W ±5% Carbon Film
R326 07-10104-10 100kohms 1/4W ±5% Carbon Film
R303 07-20101-00 100ohms 1/6W ±5% Metal Film
R301 07-20471-00 470ohms 1/6W ±5% Metal Film
R307 07-29100-00 910ohms 1/6W ±1% Metal Film
DESCRIPTION
10

ELECTRICAL PARTS LIST
REF. NO. P/N DESCRIPTION
R328 07-20101-10 100ohms 1/4W ±5% Metal Film
R309, R323 07-21000-10 100ohms 1/4W ±1% Metal Film
R321 07-21001-10 1kohms 1/4W ±1% Metal Film
R358 07-20101-21 100ohms 0.5W ±5% Metal Film
R317 07-21500-10 150ohms 1/4W ±1% Metal Film
R318 07-24702-10 47kohms 1/4W ±1% Metal Film
R322 07-29101-21 9.1kohms 0.5W ±1% Metal Film
R319 07-21002-20 10kohms 0.5W ±1% Metal Film
R330, R338 07-30339-01 3.3ohms 1W ±5% Metal Oxdized Film
R348, R349 07-30750-01 75ohms 1W ±5% Metal Oxdized Film
R332, R341 07-30511-01 510ohms 1W ±5% Metal Oxdized Film
R360 07-30339-04 3.3ohms 1W ±5% Metal Oxdized Film
R334, R344 07-30222-03 2.2kohms 3W ±5% Metal Oxdized Film
R356, R357 07-40507-05 0.05ohms 5W ±10% Ceramic
INDUCTORS
L303 08-01010-00 1uH 10% Inductor
L301, L302 08-02100-00 10uH 10% Inductor
POT
VR301 09-02181-00 180ohms Semi-POT
VR302 09-02501-00 500ohms Semi-POT
Power AMP Board R Channel (Assembled AMP PCB 01-27220-02with heatsink)
TRANSISTORS
Q405, Q409, Q416, Q426 31-01015-00 2SA1015GR TO-92 Transistor
Q401, Q406, Q407, Q430 31-00872-00 2SA872A TO-92 Transistor
Q402, Q403, Q404, Q429 31-01775-00 2SC1775A TO-92 Transistor
Q418 31-01837-00 2SA1837 TO-220 Transistor
Q431 31-02878-00 2SC2878A TO-92 Transistor
Q408, Q412, Q425 31-01815-00 2SC1815GR TO-92 Transistor
Q410, Q413 31-01220-00 KSA1220A TO-126 Transistor
Q411, Q414 31-02690-00 KSC2690A TO-126 Transistor
Q415 31-02690-00 KSC2690A TO-126 Transistor
Q417 31-04793-00 2SC4793 TO-220 Transistor
Q419, Q421, Q423, Q427 31-01943-00 2SA1943O TO-3P Transistor
Q420, Q422, Q424, Q428 31-05200-00 2SC5200O TO-3P Transistor
DIODES
D401, D402 33-11800-00 18V 0.5W Zener Diode
D403, D404, D409 33-44148-02 1N4148 Switch Diode
D405, D406 33-44148-03 1N4148 Switch Diode
D407, D408 33-40021-00 1SS88(or BAV21 [BV>200V]) Switch Diode
ICS
IC401, IC402 03-00431-00 TL431 TO-92 Regulator
CAPACTORS
C408 05-10151-01 100pF 50V ±20% Ceramic Disk
C405, C407 05-22052-00 22pF 500V ±20% Ceramic Disk
C402 05-22151-01 220pF 50V ±20% Ceramic Disk
C413, C414 05-47152-00 470pF 500V ±20% Ceramic Disk
C420 25-22312-01 22nF 100V ±10% Metallized Polyster Film
C421 06-10051-00 10uF 50V ±20% ELECT
C409, C410, C415, C416,
C417, C418, C423 25-10412-02 0.1uF 100V ±10% Metallized Polyster Film
C411 06-10121-00 100uF 25V ±20% Electrolytic
C412 06-10121-00 100uF 25V ±20% Electrolytic
C401, C403, C404 06-10021-01 10uF 25V ±20% Electrolytic
C406 06-22260-00 2200uF 6.3V ±20% Electrolytic
C419, C422 06-10012-00 10uF 100V ±20% Electrolytic
RESISTOR
R467 07-70471-08 t=80° C Posistor
R466 07-70471-09 t=90° C Posistor
R431, R439 07-50479-00 4.7ohms 1/4W ±5% Fusible
R450, R451, R452, R453,
R454, R455, R468, R469 07-50208-01 0.2ohms 1W ±5% Fusible
R459 07-50100-01 10ohms 1W ±5% Fusible
R437, R429 07-50101-02 100ohms 1W ±5% Fusible
R425 07-10101-00 100ohms 1/6W ±5% Carbon Film
11

ELECTRICAL PARTS LIST
REF. NO. P/N DESCRIPTION
R471 07-10222-00 2.2kohms 1/6W ±5% Carbon Film
R413 07-10393-00 39kohms 1/6W ±5% Carbon Film
R424 07-10104-00 100kohms 1/6W ±5% Carbon Film
R408, R420, R436, R440 07-10330-10 33ohms 1/4W ±5% Carbon Film
R404, R406, R412, R414,
R470 07-10101-10 100ohms 1/4W ±5% Carbon Film
R447 07-10221-10 220ohms 1/4W ±5% Carbon Film
R446 07-10821-10 820ohms 1/4W ±5% Carbon Film
R445 07-10122-10 1.2kohms 1/4W ±5% Carbon Film
R411, R415, R461 07-10102-10 1kohms 1/4W ±5% Carbon Film
R464 07-10682-10 6.8kohms 1/4W ±5% Carbon Film
R410, R416, R433, R442,
R443, R435 07-10103-10 10kohms 1/4W ±5% Carbon Film
R462 07-10153-10 15kohms 1/4W ±5% Carbon Film
R402, R463, R465 07-10223-10 22kohms 1/4W ±5% Carbon Film
R405, R427 07-10393-10 39kohms 1/4W ±5% Carbon Film
R426 07-10104-10 100kohms 1/4W ±5% Carbon Film
R403 07-20101-00 100ohms 1/6W ±5% Metal Film
R401 07-20471-00 470ohms 1/6W ±5% Metal Film
R407 07-29100-00 910ohms 1/6W ±1% Metal Film
R428 07-20101-10 100ohms 1/4W ±5% Metal Film
R409, R423 07-21000-10 100ohms 1/4W ±1% Metal Film
R417 07-21500-10 150ohms 1/4W ±1% Metal Film
R421 07-21001-10 1kohms 1/4W ±1% Metal Film
R418 07-24702-10 47kohms 1/4W ±1% Metal Film
R458, R472 07-28201-20 8.2kohms 0.5W ±1% Metal Film
R422 07-29101-21 9.1kohms 0.5W ±1% Metal Film
R419 07-21002-20 10kohms 0.5W ±1% Metal Film
R430, R438, R460 07-30339-01 3.3ohms 1W ±5% Metal Oxdiode Film
R448, R449 07-30750-01 75ohms 1W ±5% Metal Oxdiode Film
R432, R441 07-30511-01 510ohms 1W ±5% Metal Oxdiode Film
R434, R444 07-30222-03 2.2kohms 3W ±5% Metal Oxdiode Film
R456, R457 07-40507-05 0.05ohms 5W ±10% Ceramic
INDUCTORS
L403 08-01010-00 1uH 10% Inductor
L401, L402 08-02100-00 10uH 10% Inductor
POT
VR401 09-02181-00 180ohms Semi-POT
VR402 09-02501-00 500ohms Semi-POT
Power Board
Power Raw PCB 16-27210-01
Assembled Power PCB 01-27201-20/10 C272 Main Power PCB C-version / AH-version
TRANSISTORS
Q702, Q704, Q706, Q707,
Q715 31-01015-00 2SA1015GR TO-92 Transistors
Q712 31-00872-00 2SA872A TO-92 Transistors
Q710, Q711 31-01775-00 2SC1775A TO-92 Transistors
Q701, Q703, Q705, Q713,
Q714, Q716, Q717, Q718 31-01815-00 2SC1815GR TO-92 Transistors
Q709 31-01220-00 KSA1220A TO-126 Transistors
Q708 31-02690-00 KSC2690A TO-126 Transistors
DIODES
D703, D704, D705, D706,
D710, D712, D713, D719,
D720, D721, D722
33-44148-02 1N4148 Switch Diode
D707, D708, D709, D711,
D723, D724 33-44148-03 1N4148 Switch Diode
D716 33-44148-04 1N4148 Switch Diode
D702 33-25401-00 1N5401 Switch Diode
D718 33-11000-00 10V 0.5W Zener Diode
D714, D715 33-12400-00 24V 0.5W Zener Diode
B701, B702 33-31042-00 KBU1004 Rectifier Bridge
B703, B704 33-30142-00 DB104 Rectifier Bridge
12

ELECTRICAL PARTS LIST
REF. NO. P/N DESCRIPTION
TC701, TC702 33-60116-00 TIC116D/BT151-500R TO-220 Thyristor
ICS
IC702 03-00317-00 LM317M TO-220 Regulator
IC703 03-00337-00 LM337M TO-220 Regulator
IC704 03-00082-00 TL082CP/D DIP8 Dual OPAMP
IC705 03-01237-00 upc1237HA SIP8-IC Protection IC
CAPACTORS
C730, C731 05-47051-02 47pF 50V ±20% Ceramic Disk
C101, C102, C201, C202 05-10151-01 100pF 50V ±20% Ceramic Disk
C761, C762 05-22251-00 2n2 50V ±20% Ceramic Disk
C757 24-22461-00 220nF 63V ±20% Ceramic Disk
C706, C727 24-10461-00 0.1uF 63V ±20% Ceramic Disk
C103, C203 25-10361-04 10nF 63V ±10% Metallized Polyster Film
C704, C721, C722, C734,
C735, C740, C741, C746,
C747, C759, C760
25-22312-01 22nF 100V ±10% Metallized Polyster Film
C702, C703, C705, C711,
C712, C713, C714 25-22322-00 22nF 250V ±10% Metallized Polyster Film
C748, C749 06-10951-00 1uF 50V ±20% Electrolytic Capacitor
C733, C756 06-47912-00 4u7 100V ±20% Electrolytic Capacitor
C105, C205, C750, C751,
C752, C753, C763, C764,
C767
06-10021-01 10uF 25V ±20% Electrolytic Capacitor
C742, C743, C754 06-10051-00 10uF 50V ±20% Electrolytic Capacitor
C732 06-10012-00 10uF 100V ±20% Electrolytic Capacitor
C744, C745, C765 06-22051-00 22uF 50V ±20% Electrolytic Capacitor
C736, C737 06-22012-00 22uF 100V ±20% Electrolytic Capacitor
C104, C204 06-10160-02 100uF 6.3V ±20% Electrolytic Capacitor
C728, C729 06-10121-00 100uF 25V ±20% Electrolytic Capacitor
C758 06-33111-01 330uF 16V ±20% Electrolytic Capacitor
C755 06-47051-00 47uF 50V ±20% Electrolytic Capacitor
C725, C726 06-47012-00 47uF 100V ±20% Electrolytic Capacitor
C723, C724 06-10212-02 1000uF 100V ±20% Electrolytic Capacitor
C738, C739 06-22251-00 2200uF 50V ±20% Electrolytic Capacitor
C715, C716, C717, C718 06-10381-01 10000uF 80V ±20% Electrolytic Capacitor
RESISTOR
R799 07-90222-01 2.2kohms 0805 5% Chip Resistor
R723, R724 07-50330-02 33ohms 1/2W ±5% Fusible
R701, R702, R703, R704 07-50109-00 1ohms 1W ±5% Fusible
R738, R739 07-50201-01 200ohms 1W ±5% Fusible
R744 07-10101-00 100ohms 1/6W ±5% Carbon Film
R793 07-10561-00 560ohms 1/6W ±5% Carbon Film
R754 07-10102-00 1kohms 1/6W ±5% Carbon Film
R792 07-10202-00 2kohms 1/6W ±5% Carbon Film
R774, R778 07-10472-00 4.7kohms 1/6W ±5% Carbon Film
R777 07-10103-00 10kohms 1/6W ±5% Carbon Film
R771, R760 07-10223-00 22kohms 1/6W ±5% Carbon Film
R791 07-10104-00 100kohms 1/6W ±5% Carbon Film
R747 07-10474-00 470kohms 1/6W ±5% Carbon Film
R709, R710, R720, R729 07-10101-10 100ohms 1/4W ±5% Carbon Film
R775 07-10561-10 560ohms 1/4W ±5% Carbon Film
R707, R708, R711, R712,
R721, R722, R725, R726,
R727, R730, R732, R733,
R755, R780, R781, R728,
R784, R785
07-10102-10 1kohms 1/4W ±5% Carbon Film
R731 07-10182-10 1.8kohms 1/4W ±5% Carbon Film
R790 07-10222-10 2.2kohms 1/4W ±5% Carbon Film
R767 07-10562-10 5.6kohms 1/4W ±5% Carbon Film
R749, R750, R763, R764,
R765, R768, R779, R797 07-10103-10 10kohms 1/4W ±5% Carbon Film
R713, R714, R715, R761,
R762, R770, R786 07-10223-10 22kohms 1/4W ±5% Carbon Film
R769, R772, R773 07-10563-10 56kohms 1/4W ±5% Carbon Film
13

ELECTRICAL PARTS LIST
REF. NO. P/N DESCRIPTION
R748 07-10104-10 100kohms 1/4W ±5% Carbon Film
R719 07-10224-10 220kohms 1/4W ±5% Carbon Film
R751, R752 07-10105-10 1Mohms 1/4W ±5% Carbon Film
R102, R104, R202, R204 07-10225-00 2.2Mohms 1/6W ±5% Carbon Film
R101, R201 07-20221-00 220ohms 1/6W ±5% Metal Film
R745 07-20273-00 27kohms 1/6W ±5% Metal Film
R756 07-23903-00 390kohms 1/6W ±1% Metal Film
R717 07-21000-10 100ohms 1/4W ±1% Metal Film
R103, R203 07-20221-12 220ohms 1/4W ±5% Metal Film
R742, R743 07-22490-10 249ohms 1/4W ±1% Metal Film
R735 07-23301-10 3.3kohms 1/4W ±1% Metal Film
R740, R741 07-23321-10 3.32kohms 1/4W ±1% Metal Film
R718, R734 07-29101-10 9.1kohms 1/4W ±1% Metal Film
R736, R737 07-22202-10 22kohms 1/4W ±1% Metal Film
R782, R783 07-22502-12 25kohms 1/4W ±1% Metal Film
R757 07-26202-10 62kohms 1/4W ±1% Metal Film
R759 07-29102-10 91kohms 1/4W ±1% Metal Film
R753, R758, R788 07-21003-10 100kohms 1/4W ±1% Metal Film
R746, R789 07-22703-10 270kohms 1/4W ±1% Metal Film
R716 07-40257-03 0.025ohms 3W ±10% Cement
R766 07-30221-03 220ohms 2W ±5% Metal Oxidized Film
TRANSFORMERS
T701 18-37371-22 Main Transformer (C Version)
T701 18-37371-12 Main Transformer (AH Version)
POTS
VR701 09-02823-00 82kohms Semi-POT
RV1 09-02102-00 1kA POT
SWITCHES
SW702, SW703 11-05202-00 Slide Switches
SW704, SW705 11-05202-01 Slide Switches
RELAYS
RL702, RL703 12-03101-04 JQX-115F/036/1HS1 Speaker Relays
BUFFER MODULE BOARD
Module Raw PCB 16-27080-00 CEM-1
Assembled Module PCB 01-27080-00
TRANSISTORS
Q61, Q62 31-00369-00 2SK369GR TO-92 Transistor
or 31-00170-00 2SK170-BL TO-92 Transistor
Q64, Q66 31-00647-00 2SB647A TO-126 Transistor
Q63, Q65 31-00970-00 2SA970GR TO-92 Transistor
Q67, Q68 31-00667-00 2SD667A TO-126 Transistor
DIODES
D61, D62, D63, D64 33-44148-02 1N4148 SW Diodes
CAPACTORS
C63, C64 05-39051-00 39pF 50V ±20% Ceramic Disk
C69, C610 05-47051-00 47pF 50V ±20% Ceramic Disk
C61, C62 05-10151-00 100pF 50V ±20% Ceramic Disk
C65, C66, C67, C68 24-10461-00 0.1uF 63V ±20% Ceramic Disk
C612, C613 25-22461-00 0.22uF 63V ±10% Metallized Polyster Film
RESISTOR
R617, R618 07-10470-00 47ohms 1/6W ±5% Carbon Film
R613, R614 07-10103-00 10kohms 1/6W ±5% Carbon Film
R619, R620 07-20100-00 10ohms 1/6W ±5% Metal Film
R69, R610 07-20101-00 100ohms 1/6W ±5% Metal Film
R61, R62 07-20221-00 220ohms 1/6W ±5% Metal Film
R63, R64 07-20225-00 2.2Mohms 1/6W ±5% Metal Film
R67, R68, R611, R612 07-20102-00 1kohms 1/6W ±5% Metal Film
STANDBY BOARD
Standby Raw PCB 16-27030-00 CEM-1
Assembled Standby PCB 01-27030-00
TRANSISTORS
Q701 31-01815-00 2SC1815GR TO-92 Transistors
14

ELECTRICAL PARTS LIST
REF. NO. P/N DESCRIPTION
DIODES
D701 33-44148-02 1N4148 SW Diodes
B705 33-30142-00 DB104 Rectifier Bridge
IC
IC701 03-07805-00 7805 TO-220 Regulator
CAPACTORS
C766 05-47242-00 4n7 400V ±20% Ceramic Disk
C707 24-10461-00 0.1uF 63V ±20% Ceramic Disk
C710 24-10461-00 0.1uF 63V ±20% Ceramic Disk
C708 06-10211-00 1000uF 16V ±20% Electrolytic Capacitor
C709 06-10021-01 10uF 25V ±20% Electrolytic Capacitor
RESISTOR
R705 07-10222-10 2.2kohms 1/4W ±5% Carbon Film
R706 07-10103-10 10kohms 1/4W ±5% Carbon Film
TRANSFORMER
T702 18-27030-00 TD030-E101B Standby Transformer
RELAY
RL701 12-02101-01 VS5MB-NR or
DH1U5VDC Standby Relay
POWER TRANSISTOR BOARD
Transistor Raw PCB 16-27040-00 CEM-1
Assembled Raw PCB 01-27040-00
MISCS
PJ701 17-07001-00 12V Trigger In Trigger In Socket
RCA1, RCA2 17-01002-01 With Grounding Tap RCA, 2 holes,
AC Cord 15-10250-00 C Version
AC Cord 15-10125-00 AH Version
AC INPUT BOARD
AC Input Raw PCB 16-27207-00 CEM-1
Assembled AC Input PCB 01-27207-00
P1001 17-07102-00 GSP1.9500.1/R-30190 2 Pin AC Inlet
CZ1001, CZ1002, CZ1003 13-23903-01 VH 3.96A-3A, without middle pin Socket
C1001 05-47242-00 4N7, CT81 400V 20% Hi-Pot Capacitor
11-01101-02 BR-12A-11S Rock Switch
ATO BOARD
ATO Logic Raw PCB 16-27206-01 CEM-1
Assembled ATO Logic PCB 01-27206-01 CEM-1
DIODE
D801 33-44148-01 1N4148 Switch Diode
TRANSISTOR
Q801, Q802, Q803 31-01815-00 2SC1815GR TO92 Transistor
Q804 31-01015-00 2SA1015GR TO92 Transistor
IC
U802 03-07414-01 74HC14 DIP14 Logic IC
U803 03-07474-01 74HC74 DIP14 Logic IC
U801 03-04060-00 CD4060BCN DIP16 Logic IC
CAPACITORS
C809 26-10451-10 0603, 100nF, X7R 50V ±10% Chip Capacitor
C801, C802, C803, C804,
C805, C806 24-10461-00 0.1uF 63V 20% Monolythic
C807 06-22911-01 2.2uF, CD110 16V 20% Electrolytic Cap
C808 06-22111-09 220uF, CD110 16V 20% Electrolytic Cap
15

ELECTRICAL PARTS LIST
REF. NO. P/N DESCRIPTION
RESISTOR
R815, R816, R817, R819 07-10103-13 10kohms 1/4W 5% Carbon Film Resistor
R802, R803, R804, R805,
R806, R807, R808, R809,
R818
07-10103-10 10kohms 1/4W 5% Carbon Film Resistor
R810, R811 07-10104-10 100kohms 1/4W 5% Carbon Film Resistor
R814 07-10204-10 200kohms 1/4W 5% Carbon Film Resistor
R812, R813 07-10105-10 1Mohms 1/4W 5% Carbon Film Resistor
R801 07-10205-10 2Mohms 1/4W 5% Carbon Film Resistor
SENSE BOAR
D
Sense Raw PCB 16-27205-00 CEM-1
Assembled Sense PCB 01-27205-00 CEM-1
DIODE
D901, D902, D903, D904,
D905, D906, D907, D908,
D909, D910, D911, D912,
D913
33-44148-01 1N4148 Switch Diode
TRANSISTOR
Q901 31-01815-00 2SC1815GR TO92 Transistor
IC
U901 03-00353-00 LF353N DIP8 OPAMP
CAPACITORS
C906, C907 05-10052-00 10pF, CT1 500V 20% Ceramic Capacitor
C901, C902, C903, C904,
C905, C908, C909, C910 24-10461-00 0.1uF 63V 20% Monolithic Capacitor
C911, C912 06-22111-09 220uF 16V 20% Electrolytic Capacitor
RESISTOR
R909, R910, R914 07-10103-00 10kohms 1/6W 5% Carbon Film Resistor
R903, R904, R905, R906,
R912, R913 07-10104-00 100kohms 1/6W 5% Carbon Film Resistor
R901, R902, R911 07-10105-00 1Mohms 1/6W 5% Carbon Film Resistor
R907, R908 07-10306-00 30Mohms 1/6W 5% Carbon Film Resistor
SWITCH
S901 11-05202-00 SSSU122NB1 Slide Switch
LED&TSW BOARD
LED&Tact Switch Raw PCB 16-27209-00 CEM-1
Assembled Led&Tact Switch
PCB 01-27209-00 CEM-1
LED
LED1101 33-50525-00 Dual Color
LED1102, LED1103,
LED1104, LED1105 33-50550-00 Green
LED1106 33-50540-00 Amber
TRANSISTOR
Q1101, Q1102, Q1103 31-01015-00 2SA1015GR TO92 Transistor
RESISTOR
R1102 07-10470-10 47ohms 1/4W 5% Cabbon Film Resistor
R1103 07-10511-10 510ohms 1/4W 5% Cabbon Film Resistor
R1104, R1105 07-10102-10 1kohms 1/4W 5% Cabbon Film Resistor
SWITCH
TS1101 11-04101-00 IT-1102D-1160 Tact Switch
FUSE
F701 20-12402-01 T4.0AL/250V Fuse C Version
F701 20-12632-01 T6.3AL/250V Fuse AH Version
Fuse Holder 20-20000-00 HF-004
16

PROTECT IC CHANGE
17
R19
56k
R10
100k
Q13
2SC1815GR
Q14
2SC1815GR
1 2 3 4 5 6 7 8
J10
CON8
D10
1N4148
R15
10K
Q10
2SA1015GR
R16
10k
R11
100k
R13
10k
Q15
2SC1815GR
R22
820k
R20
220k
Q16
2SC1815GR Q17
2SC1815GR
R25
4.7k
R24
180k
Q11
2SA1015GR
R12
10k
R21
220k
Q18
2SC1815GR
Q12
2SA1015GR
R17
100k
D12
1N4148
R18
100k
R14
22k
C10
1N
D13
4.7V C11
100N
Protect Module
Q19
2SC1815
R23
56K
R26
10k
C12
0.22UF
R27
10k
R28
10k
This Protect Module replaces Protection IC 705
Remove the part below:
R769 Remove the 56K Ohm resistor
Replace and change orientation for the part below:
C756 From 4.7u/100V to 0.47u/100V.
Reverse mount the C756.
Change orientation for the part below:
D719 Reverse mount the 1N4148

SERVICE MANUAL
©NAD 2004
C 272 STEREO AMPLIFIER
NAD ELECTRONICS INTERNATIONAL
TORONTO