NAD C300 User manual

NAD
SERVICE MANUAL
C 300
STEREO
AMPLIFIER
C 300 STEREO AMPLIFIER
December 2005

TABLEOFCONTENTS
DESCRIPTIONPAGE
REARPANEL/FRONTPANELVIEW ...3
SPECIFICATIONS .4-5
DISASSEMBLYINSTRUCTIONS ..6
ALIGNMENTPROCEDURE 7
PCB LAYOUT .8-9
SCHEMATICDIAGRAM ..10
WIRINGDIAGRAM .11
ICBLOCK DIAGRAM ....12
ELECTRICALPARTSLIST 13-16
EXPLODEDVIEW PARTSLIST ..17
EXPLODEDVIEW ..18
PACKINGDIAGRAM .19
_SERVICESAFETYPRECAUTIONS_
1. Replacing the fuses
CAUTION:FORCONTINUEDPROTECTIONAGAINSTTHERISKOFFIRE,REPLACEONLYWITH
DESIGNATEDTYPE OF FUSE FOR*AH, *B1, *BAND *C VERSIONS.
Reference NoPartNumber Description
F701 F702 20-00500-25 T5AL250VFuse
F703 F704 20-00050-25 T0.5AL250VFuse
NOTE:
<*AH>: USA, CANADIANMODELONLY.
<*B>: UKMODELONLY.
<*B1>: AUSTRALIANMODELONLY.
<*C>: EUROPEANMODELONLY.
2. Safetycheck out
(OnlyU.S.A. Model)
Beforereturning the product tothe customer, makeleakage current orresistancemeasurementsto
determine that exposed partsareacceptablyinsulated fromthe supplycircuit.
Partsmarked withthe symbol “
”arecriticalwithregardtothe riskoffireand electricshock.Replace
onlywithpartsrecommended bythe manufacturer.
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-4-
SPECIFICATIONS
POWERAMPLIFIERSECTION
STEREO MODE
CONTINUOUSAVERAGEPOWEROUTPUTINTO 8OHMS .25W
(Min. Powerperchannel, 20Hz-20kHz, bothchannelsdriven,
withno morethan rated distortion)
Rated impedance ..4-8ohms
Rated distortion (THD 20Hz-20kHz) ..0.03%
Clipping power(maximumcontinuouspowerperchannel) .. 30W
IHFdynamicheadroomat 8ohms .+2.4dB
IHFdynamicpower8ohms: ...43W
4ohms:...65W
2ohms:...90W
Damping factor(ref. 8ohms50Hz) ...>100
Peakundistorted O/Pcurrent (into0.1 0.5ohms, bothchannelsrunning) 40A
Frequency responseat 20Hz-20kHz(Tone Controlin) ...0±0.5dB
Frequency responseat 10Hz/70kHz .... ..-2dB
THD ..<0.03%
(TotalHarmonicDistortion, 20Hz-20kHz, from250mWtorated output)
SMPTEI.M....<0.03%
(IMdistortion, 60Hz+ 7kHz, 4:1, from250mWtorated output)
IHFI.M. (CCIFIMdistortion, 19+20kHzat rated output)and DIM100 <0.03%
PREAMPLIFIERSECTION
Line LevelInputs(Disc, CD, Video,Aux,Tuner,Tape 1,Tape 2)
Input impedance(Rand C) ...210kohms//320pF
Input sensitivity(ref. rated power) ....200mV
Maximuminput level .5Vrms
Signal/Noiseratio,A-weighted ...>100dBref.1W
>114dBref. rated power
MaximumOutputLevel(Tape 1&2) ...5Vrms
TONECONTROLS
Treble(at10kHz) ..±6dB
Bass (at 100Hz) ...±5dB
PHYSICALSPECIFICATION
Dimensionsinmm (Width Height Depth) ...435 95 325
Net weight ..5.0kg
Shipping Weight ....6.2kg
PowerConsumption(at 2 50W/4ohmsoutput)230V50Hz .185W

ＴＰ５ ＴＰ６
ＴＰ７ ＴＰ８
ＶＲ３０２
ＶＲ３０１
ＶＲ４０１
Ｄ３０５Ｄ４０５
ＶＲ４０２
ALIGNMENT PROCEDURE
A. OUTPUT OFFSET VOLTAGE
1.Push Power on, preheat unit for 5 minutes.
2.Connect the DC Millivoltmeter to L Channel speaker output terminals or TP5 and
TP7, adjust VR301 to get a reading of 0V±30mV.
3.Connect the DC Millivoltmeter to R Channel speaker output terminals or TP6 and
TP8, adjust VR401 to get a reading of 0V±30mV.
B. IDLING CURRENT
1.Connect the DC Millivoltmeter across D305, adjust VR302 for 160 -- 180mV reading
on meter.
2.Connect the DC Millivoltmeter across D405, adjust VR402 for 160 -- 180mV reading
on meter.
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ＲＣＨ－ＢＡＲ ＧＮＤ－ＢＡＲ
ＰＯＷＥＲ ＴＲＡＮＳＦＯＲＭＥＲ
ＣＢ７０４
ＨＥＡＤＰＨＯＮＥ
ＢＯＡＲＤ ＰＯＷＥＲ ＳＷＩＴＣＨ
ＢＯＡＲＤ
ＰＯＷＥＲ ＬＥＤ
ＢＯＡＲＤ ＤＩＳＰＬＡＹ ＢＯＡＲＤ
ＭＯＤＵＬＥ１ ＴＯ ＣＺ３０１ ＭＯＤＵＬＥ２ ＴＯ ＣＺ４０１
ＭＯＤＵＬＥ３ ＴＯ ＣＺ６１
ＣＢ５０１
ＣＢ１０２
ＭＡＩＮ ＢＯＡＲＤ
ＴＯＮＥ ＣＯＮＴＲＯＬ ＢＯＡＲＤ
ＲＥＤ（ＣＥ） ＢＬＵＥ（ＡＨ）
ＢＲＯＷＮ （ＣＥ） ＢＬＵＥ （ＣＥ）
ＰＲＥ－ＥＮＤ ＢＡＲ
ＰＯＷＥＲ ＢＯＡＲＤ
WIRING DIAGRAM
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ＢＬＵＥ（ＡＨ） ＷＨＩＴＥ（ＡＨ） ＢＬＡＣＫ（ＡＨ）
ＷＨＩＴＥ（ＡＨ）

RESISTORS
R717 07-90001-00T t= 90° Posistor
R813×2 07-05082-06 8R2 1/6W 5% Carbon Film Resistor
R1, R617, R618, R619, R620,
R815x2
07-05100-06 10 1/6W 5% Carbon Film Resistor
R615, R616, R814×2 07-05330-06 33 1/6W 5% Carbon Film Resistor
R809×2 07-05680-06 68 1/6W 5% Carbon Film Resistor
R808×2 07-05221-06 220 1/6W 5% Carbon Film Resistor
R810×2 07-05471-06 470 1/6W 5% Carbon Film Resistor
R611, R612 07-05102-06 1K 1/6W 5% Carbon Film Resistor
R613, R614, R812×2 07-05103-06 10K 1/6W 5% Carbon Film Resistor
R324, R424 07-05104-06 100K 1/6W 5% Carbon Film Resistor
R321, R421 07-05020-04 20.25W 5% Carbon Film Resistor
R319, R419 07-05220-04 22 0.25W 5% Carbon Film Resistor
R309, R316, R409, R416 07-05330-04 33 0.25W 5% Carbon Film Resistor
R313, R413 07-05680-04 68 0.25W 5% Carbon Film Resistor
R314, R414, R738, R744,
R745
07-05101-04 100 0.25W 5% Carbon Film Resistor
R310, R410 07-05221-04 220 0.25W 5% Carbon Film Resistor
R315, R415 07-05271-04 270 0.25W 5% Carbon Film Resistor
R305, R307, R312, R405,
R407, R412, R511, R512
07-05102-04 1K 0.25W 5% Carbon Film Resistor
R320, R322, R420, R422 07-05471-04 470 0.25W 5% Carbon Film Resistor
R504, R505, R506, R507,
R508, R509
07-05222-04 2K2 0.25W 5% Carbon Film Resistor
R711, R726, R728, R735 07-05332-04 3K3 0.25W 5% Carbon Film Resistor
R318, R418
R311, R411 07-05472-04 4K7 0.25W 5% Carbon Film Resistor
R704, R720 07-05682-04 6K8 0.25W 5% Carbon Film Resistor
R736, R737 07-05822-04 8K2 0.25W 5% Carbon Film Resistor
R302, R308, R402, R408,
R503, R510, R513, R514,
R515, R708, R709, R729,
R740
07-05103-04 10K 0.25W 5% Carbon Film Resistor
R304, R404, R721, R741 07-05223-04 22K 0.25W 5% Carbon Film Resistor
R703, R705, R706, R707,
R710, R712, R714, R715,
R716, R718, R719, R724,
R727
07-05333-04 33K 0.25W 5% Carbon Film Resistor
R702, R730 07-05563-04 56K 0.25W 5% Carbon Film Resistor
R328, R428 07-05104-04 100K 0.25W 5% Carbon Film Resistor
R701, R725 07-05224-04 220K 0.25W 5% Carbon Film Resistor
R323, R423 07-05684-04 680K 0.25W 5% Carbon Film Resistor
R102, R104, R106, R108,
R110, R112, R114, R116,
R202, R204, R206, R208,
R210, R212, R214, R216
07-05105-04 1M 0.25W 5% Carbon Film Resistor
R713 07-05005-50A 0.05 5W 5% Cerment Resistor
R327, R427 07-01911-10B 910 1W 1% Flame Proof Resistor
R326, R426 07-05033-20B 3R3 2W 5% Flame Proof Resistor
R329, R429 07-05221-20B 220 2W 5% Flame Proof Resistor
R306, R406 07-05102-20B 1K 2W 5% Flame Proof Resistor
R723 07-10561-02C 560 0.5W 10% Fusible Resistor
R805×2, R806×2 07-05680-06D 68 1/6W 5% Metal Film Resistor
R802×2 07-05101-06D 100 1/6W 5% Metal Film Resistor
R61, R62 07-05221-06D 220 1/6W 5% Metal Film Resistor
R65, R66 07-01391-06D 390 1/6W 1% Metal Film Resistor
R69, R610 07-01621-06D 620 1/6W 1% Metal Film Resistor
R67, R68 07-05102-06D 1K 1/6W 5% Metal Film Resistor
REF. NO. DESCRIPTIONPART NO.
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REF. NO. DESCRIPTIONPART NO.
R621 07-05102-06D 1K 1/6W 5% Metal Film Resistor
R803×2 07-05222-06D 2K2 1/6W 5% Metal Film Resistor
R807×2, R819×2 07-05103-06D 10K 1/6W 5% Metal Film Resistor
R120, R220 07-05393-06D 39K 1/6W 5% Metal Film Resistor
R63, R64 07-01225-06D 2M2 1/6W 1% Metal Film Resistor
R801×2 07-01225-06D 2M2 1/6W 1% Metal Film Resistor
R303, R403 07-01330-04D 33 0.25W 1% Metal Film Resistor
R301, R401 07-05101-04D 100 0.25W 5% Metal Film Resistor
R135, R235 07-05151-04D 150 0.25W 5% Metal Film Resistor
R731 07-012260-04D 226 0.25W 1% Metal Film Resistor
R734 07-012320-04D 232 0.25W 1% Metal Film Resistor
R130, R230 07-05391-04D 390 0.25W 5% Metal Film Resistor
R133, R233 07-05431-04D 430 0.25W 5% Metal Film Resistor
R105, R107, R115, R207,
R209, R101, R201, R117,
R211, R103, R215, R111,
R109, R205, R217, R203,
R113, R213
07-05471-04D 470 0.25W 5% Metal Film Resistor
R131, R231 07-05102-04D 1K 0.25W 5% Metal Film Resistor
R129, R229 07-05182-04D 1K8 0.25W 5% Metal Film Resistor
R134, R234 07-05222-04D 2K2 0.25W 5% Metal Film Resistor
R128, R228 07-05332-04D 3K3 0.25W 5% Metal Film Resistor
R732, R733 07-01622-04D 6K2 0.25W 1% Metal Film Resistor
R132, R232 07-05912-04D 9K1 0.25W 5% Metal Film Resistor
R119, R219 07-05104-04D 100K 0.25W 5% Metal Film Resistor
R118, R218 07-05274-04D 270K 0.25W 5% Metal Film Resistor
POTENTIOMETERS
RV1, RV2 09-16103-12 10KA TONE Potentiometers
RV3 09-16103-12M 10KA VOLUME Potentiometer
RV4 09-16203-02 20K MN BALANCE Potentiometer
VR301, VR302, VR401,
VR402
10-01103-00T 10K SEMI Potentiometers
CAPACITORS
C63, C64 05-00100-20 10pF 50V ±20% Ceramic Disk Capacitor
C502, C503 05-00220-20 22pF 50V ±20% Ceramic Disk Capacitor
C802×2 05-00470-10 47pF 50V ±10% Ceramic Disk Capacitor
C101, C102, C103, C104,
C105, C106, C107, C108,
C109, C201, C202, C203,
C204, C205, C206, C207,
C208, C209
05-00101-20 100pF 50V ±10% Ceramic Disk Capacitor
C69, C610 05-00101-20 100pF 50V ±10% Ceramic Disk Capacitor
C804×2 05-00151-10 150pF 100V ±10% Ceramic Disk Capacitor
C61, C62, C801×2 05-00221-10 220pF 50V ±10% Ceramic Disk Capacitor
C611 05-00331-10 330pF 50V ±10% Ceramic Disk Capacitor
C121, C221 05-00102-20 1000pF 50V ±10% Ceramic Disk Capacitor
C623 05-04472-20 4.7nF 400V ±20% Ceramic Disk Capacitor
C112, C212, C509, C708,
C723, C724, C734
05-00103-20 10nF 50V +50-20% Ceramic Disk Capacitor
C65, C66, C67, C68, C501,
C714, C715, C718, C719,
C722, C806×2, C807×2,
05-10104-20 0.1uF 50V ±20% Ceramic Disk Capacitor
C311, C411, C303, C403 05-30103-10 10nF 63V ±10% Polyester Film Capacitor
C117, C217 05-30183-10 18nF 63V ±10% Polyester Film Capacitor
C110, C210, C118, C218,
C308, C309, C408, C409
05-30104-10 0.1uF 63V ±10% Polyester Film Capacitor
C701, C702 05-31104-10 0.1uF 100V ±10% Polyester Film Capacitor
C120, C220 05-20115-10A 1.15uF 63V ±5 % Metallized Polyester Film Capacitor
C119, C219, C810×2 05-20224-10A 0.22uF 63V ±5 % Metallized Polyester Film Capacitor
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REF. NO. DESCRIPTIONPART NO.
C508, C707 06-50105-20 1uF 50V ±20% Electrolytic Capacitor
C504, C505 06-50475-20 4.7uF 50V ±20% Electrolytic Capacitor
C803×2 06-16106-20M 10uF 16V ±20% Electrolytic Capacitor
C721 06-25106-20 10uF 25V ±20% Electrolytic Capacitor
C727, C728 06-35106-20 10uF 35V ±20% Electrolytic Capacitor
C705, C716, C717, C725,
C726, C729, C730
06-50106-20 10uF 50V ±20% Electrolytic Capacitor
C808×2 06-35226-20M 22uF 35V ±20% Electrolytic Capacitor
C709 06-16336-20 33uF 16V ±20% Electrolytic Capacitor
C305, C307, C405, C407,
C506
06-16476-20 47uF 16V ±20% Electrolytic Capacitor
C116, C216 06-25107-20 100uF 25V ±20% Electrolytic Capacitor
C710, C711 06-06107-20 100uF 6.3V ±20% Electrolytic Capacitor
C304, C404, C720, C731,
C732
06-35107-20 100uF 35V ±20% Electrolytic Capacitor
C706 06-50107-20 100uF 50V ±20% Electrolytic Capacitor
C306, C406 06-10227-20 220uF 10V ±20% Electrolytic Capacitor
C703, C704 06-50109-20 10000uF 50V +50%-20% Electrolytic Capacitor
C302, C402 06-06228-20 2200uF 6.3V ±20% Electrolytic Capacitor
C712, C713 06-50228-20 2200uF 50V ±20% Electrolytic Capacitor
DIODES
D304, D404 02-00027-05 2V7 0.5W Zener Diode
D715 02-00056-05 5V6 0.5W Zener Diode
D704, D706 02-00240-05 24V 0.5W Zener Diode
D801×2, D802×2, D61, D63 02-24148-00 1N4148 Switch Diode
D303, D403, D718 02-24148-00 1N4148 Switch Diode
D62, D64, D302, D306, D307,
D301, D401, D402, D406,
D407, D701, D702, D703,
D705, D707, D708, D711,
D712, D713, D714, D716,
D717
02-24148-00 1N4148 Switch Diode
D305, D405 02-15822-00 1N5822 Schottky Diode
D309, D409 02-00014-00 2AK14 Switch Diode
LD501 02-30515-255 D-LED φ5Dual-Color LED
B702 02-42006-00 KBU6D Rectifier Bridge
B701 02-42008-00 KBU8D Rectifier Bridge
IC
IC501 03-10621-03 IS1U621L IR Sensor
IC502 03-02051-20 AT89C2051-24 Micom
IC701 03-00317-03 LM317T Regulator
IC702 03-00337-03 LM337T Regulator
IC703 03-07805-03 7805 Regulator
TRANSISTORS
Q303, Q305, Q309, Q403,
Q405, Q409, Q501, Q502,
Q503, Q504, Q506, Q702,
Q703, Q710, Q711, Q713,
Q805×2
01-01015-070 2SA1015-GR Small Signal Transistor
Q63, Q65, Q310, Q410, Q714,
Q802×2, Q803×2, Q804×2,
Q806×2
01-00872-020 2SA872AE Small Signal Transistor
Q64, Q66, Q304, Q404, Q712,
Q808×2
01-00649-001 2SB649A Power Transistor

REF. NO. DESCRIPTIONPART NO.
Q302, Q402, Q701, Q704,
Q705, Q707
01-01775-000 2SC1775AE Small Signal Transistor
Q306, Q406, Q505, Q708,
Q709
01-01815-070 Small Signal Transistor
Q301, Q401 01-02878-020 2SC2878-A Switching Transistor
Q67, Q68, Q706, Q807×2 01-00669-001 2SD669A Power Transistor
Q307, Q308, Q407, Q408 01-00055-003 STP55NE06L Power MOSFET
Q61, Q62, Q801×2 01-00369-070 Junction FET
SWITCHES
SW1, SW2, SW3, SW4, SW5,
SW6, SW7
11-03007-00 Latching Switch
SW8 11-01022-01 DPDT2 Push Switch
SW701 11-01001-00 Power Switch
FUSES
F703, F704 20-00050-25 T500mA 250V Time-lag Fuse
F701, F702 20-00500-25 T5A 250V Time-lag Fuse
OTHERS
L301, L401 08-15580-10 1uH Air Inductor
T701*C 08-67261-00 TI-67261D Transformer C Version
T701*AH 08-67262-00 TI-67262 Transformer AH Version
JD601 12-02024-05 Relay
TP5, TP6, TP7, TP8 13-01000-00 Test Pin
CB701 17-00200-01 PHONE JACK Head Phone Jack
RCA1, RCA2, RCA3 17-01200-04 4-Pin RCA
RCA4 17-01200-06 6-Pin RCA
CB1 17-02200-04 Binding Post
SDDLB1027U-RN
2SK369-GR
FTR-F1AA024A
SW1-SW5, SW7 DPDT2
SW6 FPDT2
2SC1815-GR
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Qty. Qty.
C001 45-00300-01 Chassis 117-01200-06 6-Pin RCA 1
C002 45-00300-04 Base Cover 1C037 45-00320-08 Module Support 1 1
C003 53-00320-05 Foot 4
C004 56-00320-01 Foot Pad 4F001 55-00300-01 Fascia 1
C005 09-16103-12M Volume Potentiometer 1F002 53-00300-01 Input Button Lozenge 1
C006 11-03007-00 Latching Switch 1F003 53-00320-01 Tone Control Lozenge 1
C007 45-00300-02 Stopper 2F004 51-00320-01 Volume Knob 1
C008 40-08040-22 Bolt 1F005 51-00320-02 Tone Knob 3
C009 45-00320-07 Trans. Bracket 1F006 52-00320-02 Power Button 1
C010 46-00320-03 Shielding Box 1F007 53-00300-02 Push Button 8
C011 43-08002-00 Spring Washer 2F008 53-00320-04 Power Button Bezel 1
C012 41-08008-00 Nut 2F009 54-00320-02 LED Lens 1
C013 56-00320-05 Rubber Pad 2F010 54-00320-01 IRS LENS 1
C014*C 08-67261-00 Transformer C Version 1S001 45-00300-03 Subfascia 1
C014*AH 08-67262-00 Transformer AH Version 1S002 45-00300-10 IR Cover 1
C015 45-00320-09 Transformer Disc 1S003 45-00300-09 Bracket (PH.) 1
C016 69-00300-02 Transformer Label 1S004 11-01001-00 Power Switch 1
C017 47-00300-03 Heat Sink(Big) Plate 1S005 17-00200-01 Head Phone Jack 1
C018 47-00300-02 Heat Sink 1S006 11-01022-01 Push Switch 1
C019 56-00300-01 Heat Conductive Pad 4S007 09-16203-02 BALANCE POT 1
C020 16-0C300-11 Power Transistor Fixer 2S008 09-16103-12 TONE POT 2
C021 45-00300-06 Tr. Clamper 2
C022 07-90001-00T Posistor 1R001*C 46-00300-02 Rear Panel 1
C023 45-00300-05 PCB Support 1R001*AH 46-00300-02H Rear Panel 1
C024 55-00300-02 Module Lid 2R002 58-00320-01 Strain Relief Bushing 1
C025 45-00300-13 Trans.Clamp (Module) 2R003*C 15-00183-00 AC Cord C Version 1
C026 47-00300-04 Module Support 2 2R003*AH 15-00183-00H AC Cord AH Version 1
C027 56-00300-02 Insulated Cushion 2
C028 47-00300-01 Small Heatsink 3T001 46-00300-01 Top Cover 1
C029 48-00300-04 Bus Bar (3) 1
C030 48-00300-02 Bus Bar (1) 20001 40-04008-07 Self Taping Screw(4×8) 8
C031 48-00300-03 Bus Bar (2) 10002 40-04012-01 Machine Screw(4×12) 2
C032 59-00300-02 PCB Spacer 10003 40-03008-01 Self Taping Screw(STB3×8) 5
C033 45-00300-11 BDP Support 10004 40-13008-01 Self Taping Screw(BTB3×8) 17
C034 48-00300-01 Pin (BDP) 10005 40-03006-01 Self Taping Screw(3×6) 46
C035 17-02200-04 Speaker Binding Post 10006 40-12604-01 Self Taping Screw(2.6×4) 2
C036 17-01200-04 4-Pin RCA 3
REF. NO. PART NO. DESCRIPTIONREF. NO. PART NO. DESCRIPTION
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F001F001
F002F002
F003F003
F010F010
F007F007
F005F005
F007F007
F006F006
F008F008
F009F009
F004F004
S001S001
S002S002
S003S003
S004S004 S005S005
S006S006
S007S007 C001C001
C002C002
C003C003
C004C004
C005C005
C006C006
C007C007
C008C008
C009C009
C010C010
C011C011
C012C012
C013C013
C014C014
C013C013
C017C017
C018C018
C019C019
C020C020
C021C021
C022C022
C023C023
C024C024
C025C025
C026C026
C028C028
C029C029
C030C030
C031C031
C032C032
C027C027
C033C033
C034C034
C035C035
C036C036
T001T001
R001R001
R002R002
R003R003
00010001
00020002
00010001
00030003
00040004
00040004
00040004 00050005
00050005
00050005
00040004
00050005
00050005
00050005
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00060006
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C037C037
S008S008

MEMO

SERVICE MANUAL
©NAD 2005
C 300 STEREO AMPLIFIER
NAD ELECTRONICS INTERNATIONAL
TORONTO