NAD C 272 Service Manual
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NAD C 272 Service Manual

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NAD
C 272
STEREO
AMPLIFIER

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Summary of Contents for NAD C 272

  • Page 1 C 272 STEREO AMPLIFIER...

  • Page 2: Specifications

    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 –...
  • Page 3 ALIGNMENT PROCEDURE (C272) 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.
  • Page 6 (AH VER.) (C VER.) S1001 ROCK SWITCH REV. ECN No. DESCRIPTION Date APPRO. NAD ELECTRONICS INTERNATIONAL CB705 CB705 5PIN 5PIN ADD R914,C808,C911,C912 TO STANDBY BOARD CZ705 PN U1 CHANGED TO U801 ADD 0.1uF CAP FROM TRIG IN TO GND V3.7...
  • Page 7 WIRING DIAGRAM...

  • Page 8: Exploded View

    EXPLODED VIEW S015 S013 S014 C040 C039 T001 S005 C038 C041 C019 S006 C020 S009 S007 C021 R004 S015 S002 C028 S013 S005 S001 C029 S008 S005 S014 C031 R006 C030 S009 C022 S011 S004 C027 C037 S005 C026 C025 S005 R005 S010...

  • Page 9: Exploded View Parts List

    EXPLODED VIEW PARTS LIST REF.NO PART NO. DESCRIPTION Qty. REF.NO PART NO. DESCRIPTION Qty. C001 66-026002-1 Chassis F001 67-026001-0 Fascia C002 66-005004-0 Base Cover F002 67-018001-0 End Cap L C003 75-010004-1 Foot F003 67-018002-0 End Cap R C004 78-001002-0 Foot Pad F004 76-003001-0 LED Lens...

  • Page 10: Electrical Parts List

    ELECTRICAL PARTS LIST DESCRIPTION REF. NO. 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...
  • Page 11 ELECTRICAL PARTS LIST DESCRIPTION REF. NO. 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...
  • Page 12 ELECTRICAL PARTS LIST DESCRIPTION REF. NO. 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, 07-10101-10 100ohms 1/4W...
  • Page 13 ELECTRICAL PARTS LIST DESCRIPTION REF. NO. TC701, TC702 33-60116-00 TIC116D/BT151-500R TO-220 Thyristor 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 ±20% Ceramic Disk C101, C102, C201, C202 05-10151-01...

  • Page 14: Standby Board

    ELECTRICAL PARTS LIST DESCRIPTION REF. NO. 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...

  • Page 15: Ac Input Board

    ELECTRICAL PARTS LIST DESCRIPTION REF. NO. DIODES D701 33-44148-02 1N4148 SW Diodes B705 33-30142-00 DB104 Rectifier Bridge IC701 03-07805-00 7805 TO-220 Regulator CAPACTORS C766 05-47242-00 400V ±20% Ceramic Disk C707 24-10461-00 0.1uF ±20% Ceramic Disk C710 24-10461-00 0.1uF ±20% Ceramic Disk C708 06-10211-00 1000uF...
  • Page 16 ELECTRICAL PARTS LIST DESCRIPTION REF. NO. RESISTOR R815, R816, R817, R819 07-10103-13 10kohms 1/4W Carbon Film Resistor R802, R803, R804, R805, R806, R807, R808, R809, 07-10103-10 10kohms 1/4W Carbon Film Resistor R818 R810, R811 07-10104-10 100kohms 1/4W Carbon Film Resistor R814 07-10204-10 200kohms...
  • Page 17 © NAD 2004 NAD ELECTRONICS INTERNATIONAL TORONTO...

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