NAD-275BEE-pwr-sm维修电路原理图.pdf

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1、LAUNAMECIVRES LAUNAMECIVRES C275BEE C/AH ? NAD 2010 NAD ELECTRONICS INTERNATIONAL TORONTO C275BEEHA/C STEREO AMPLIFIER C275BEEHA/C STEREO AMPLIFIER STEREO AMPLIFIER RadioFans.CN 收音机爱 好者资料库 CONTENTS FRONT PANEL/REAR PANEL VIEW? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

2、 ? ? ? ? ? ? ?3 SPECIFICATIONS? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 4 ALIGNMENT PROCEDURE/ALIGNMENT POINTS? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?5 WIRING DIAGRAM? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

3、 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?6 SCHEMATIC DIAGRAM? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?7-12 PCB LAYOUT? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

4、 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 13-18 ELECTRICAL PARTS LIST? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?19-32 EXPLODED VIEW? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

5、? ? ? ? ? ? 33 EXPLODED VIEW PARTS LIST? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?34 PACKING DIAGRAM? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 35 SERVICE SAFETY PRECAUTIONS 1.

6、 Replacing the Fuses CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE. REFERENCE NO. PART NUMBER DESCRIPTION Rear Panel AH A20-12103-00 Littelfuse618 T10AL/250V C A20-12702-20 Littelfuse618 T5AL/250V STANDBY Board F401 A20-12102-00 Littelfuse618 T1AL/250

7、V NOTE: *AH : North American version only *C : European version only 2. Safety-check out (North American model only) Before returning the product to the customer, make leakage current or resistance measurements to determine that exposed parts are acceptably insulated from the supply circuit. Parts m

8、arked with the symbol are critical with regard to the risk of fire and electric shock.Replace only parts recommended by the manufacturer. - 2 - RadioFans.CN 收音机爱 好者资料库 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? - 3 - RadioFans.CN 收音机爱 好者资料库 FIXED IN, SPEAKER OUT Continuous average

9、 power , stereo,8 and 4 ohms at rated thd ,20-20k 150W Continuous average power 8 ohms , bridge mode 330W Rated thd, 20-20k, SMPTE and CCIF IMD, DIM 100 170W IHF dynamic power 8 ohms 250W IHF dynamic power 4 ohms 410W IHF dynamic power 2 ohms 600W IHF dynamic power 8 ohms(Bridge Mode) 800W IHF dynam

10、ic power 4 ohms(Bridge Mode) 1200W Peak output current 1msec, 1 ohm 50A S/N A wtd re 1 W 102 dB S/N A Wtd re 150W 123 dB Damping factor ( re 8 ohms, 50 Hz and 1kHz) 180 Frequency response 20-20k 85 dB 10kHz 75 dB Minimum Input Level for AUTO TRIGGER 1mV at 1KHz Time to power OFF at no signal in AUTO

11、 mode 10 minutes Rated power ( 230 or 120 V AC 50.60 Hz) 312 W Standby power 1W Idle power 100W Net weight 14.6 kg Shipping weight 16.9 kg Dimensions 435x133x352 mm - 4 - SPECIFICATIONSRadioFans.CN 收音机爱 好者资料库 A. DC OFFSET VOLTAGE The DC OFFSET between OFFSET Test Point and AGND must be within 0+/-20

12、mV. B. IDLING CURRENT The idling current in the output stage of the poweramp should be set to 30mA+/-5mA per pnp-npn transistor pair (This means the mid point voltage is 6.6mV with down limit of 5.5mV and up limit of 7.7mV). The alignment procedure is: At first, adjust RV102 (Marked as “Idling Curre

13、nt ADJ” in the drawing below) for a voltage of 6.6mV +/- 1mV between Test point 1 and 2. Then preheat the unit for 1 minutes, let idling current settled and then readjust to 6.6mV +/- 1mV. This is a no-load adjustment. Pls note: Though the idling current is set as 6.6mV +/-1mV during the adjustment,

14、 due to the influence of varied ambient temperature and mains voltage etc., the idling current will drift after some time. During the normal checking of idling current in the service field, its acceptable as long as the voltage is in the range of 5.5mV7.7mV C. ISC SENSITIVITY The ISC sensing voltage

15、 can allow 0mV+/-50mV. But, for the alignment process in our factory, we tighten the limit to 0mV+/-10mV. That is to adjust Pot RV103 (as marked as “ISC SENS ADJ” in the below drawing) to get a voltage between the “ISC SENSE TEST POINT” and AGND to be 0mV+/-10mV. - 5 - ALIGNMENT PROCEDURE RadioFans.

16、CN 收音机爱 好者资料库 LEFT POWERAMP BOARD RIGHT POWERAMP BOARD PAD6 PAD3PAD2PAD5PAD4 FROM PAD1-6 FROM P208AFROM P206B FROM P204A TO LEFT P101B TO LEFT P103B TO P901B TO L#? ?$? ? ?$? ?#?=?=?&;#? ? ? ? ? ? ? ? ? ? ? ?#? ;? ? ?$? ? ? ? ? ? ?$? ;? ? #? ? ? #? ? ? ? ? $? ?=# ;= ?=# ? ? #? ? ? ;? #? ? ? ? ? ? ?

17、#? ? ? ? ? ? ?=? #? ? ? ? ? ? ? ? ? ?#? ? ? ? ?#? ? ? ? ? ? ? ? ? #? #? #? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?$? ?$? ? ? #? #? ? ? ? ? ? ? ? ? ? ? ? ? #? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? #? ? ? ? ? ? ? #? ? ? ? #? #? ? ? ? ?=?#? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? #? ? ? ?=? ? #? ?

18、#? ? ? ? ? ? ? ? ? ? ? ? ? ? #? ? ? ? ? ? ? ? ? ? ? ? ? #? ? - 13 - PCB LAYOUT RadioFans.CN 收音机爱 好者资料库 ?;=?#?#? ? ? ?;=?#?=?=?&;#? ? ? ? ?#? ? ? ? ? ;? ?#? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? #? ? ? ? ? ? ? ? ? ? ? ? ? ? ?#? ?#? #? ?_? ?!? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ;? ? ? ? ? ? ? ? ? ?=# ?=# ? ? ? ?

19、 ? ? ? ? ? ? ? ? ? ? ? ? ? ?#? ?=?;?= ?;?=?;=? ?;? #?=?#?|? $= ?#? #? =?# ? ? ? ? ? ? ? #? ?;?= ? ;? ? ? ? ? ? ? ? ? ? ? $? ? ? ? ? ? ? #? ? ? ? ? ?_?_ ? ?!?$?_? ;? #? #? #? #? #? ? ? ? ? - 15 - PCB LAYOUT RadioFans.CN 收音机爱 好者资料库 ?#?#? ? ?#?=?=?&;#? ? ?!? ? ? ? ? ? - 16 - PCB LAYOUT (01-37506-00) Ra

20、dioFans.CN 收音机爱 好者资料库 ?#;?_?_ ? ? ? ? ? ? #? ? ;? ? ? ? ?_? ? #=# ? &;=? ?=? ? #? ? #? ?_? #? ?_?_?#? ?_?_?!? ? - 18 - PCB LAYOUT RadioFans.CN 收音机爱 好者资料库 DESIGNATORDESCRIPTIONPART TYPEPART NUMBERFOOTPRINT P/N 01-37501-00 PCB1 BOARD (POWERAMP MODULE) DIODE D101Switch Diode1N414833-44148-00DAX/.300X.0

21、80/.031 D102Switch Diode1N414833-44148-00DAX/.300X.080/.031 D103Switch Diode1N414833-44148-00DAX/.300X.080/.031 D104Switch Diode1N414833-44148-00DAX/.300X.080/.031 D105Switch Diode1N414833-44148-00DAX/.300X.080/.031 D106Switch Diode1N414833-44148-00DAX/.300X.080/.031 D107Switch Diode1N414833-44148-0

22、0DAX/.300X.080/.031 D108Switch Diode1N414833-44148-00DAX/.300X.080/.031 D109Switch DiodeBAV2133-40021-00DAX/.300X.080/.031 D110Switch DiodeBAV2133-40021-00DAX/.300X.080/.031 D111Switch Diode18V, 1/2W33-11800-00DAX/.300X.080/.031 D112Switch Diode1N414833-44148-00DAX/.300X.080/.031 D113Rectifier Diode

23、1N540433-25404-02DAX/.600X.200/.059 D114Switch Diode1N414833-44148-00DAX/.300X.080/.031 D115Switch Diode1N414833-44148-00DAX/.300X.080/.031 D116Switch Diode1N414833-44148-00DAX/.300X.080/.031 D117Switch Diode1N414833-44148-00DAX/.300X.080/.031 D118Switch DiodeBAV2133-40021-00DAX/.300X.080/.031 D119S

24、witch DiodeBAV2133-40021-00DAX/.300X.080/.031 D120Zener Diode6.8V, 1/2W33-16809-00DAX/.300X.080/.031 D125Switch Diode2.4V, 1/2W33-12409-00DAX/.300X.080/.031 D126Switch Diode1N414833-44148-00DAX/.300X.080/.031 D127Switch Diode1N414833-44148-00DAX/.300X.080/.031 D128Switch Diode1N414833-44148-00DAX/.3

25、00X.080/.031 D129Switch Diode1N414833-44148-00DAX/.300X.080/.031 D130Switch Diode1N414833-44148-00DAX/.300X.080/.031 TRANSISTOR Q101TransistorKSC2690AYSTU31-02690-00TO126/90/ECB Q102Transistor2SA970-GRJ31-00970-00TO92/100/ECB Q103Transistor2SC2240-GRJ31-02240-00TO92/100/ECB Q104Transistor2SC2878J31-

26、02878-00TO92/100/ECB Q105Transistor2SA1015-GR31-01015-00TO92/100/ECB Q106Transistor2SC2878J31-02878-00TO92/100/ECB Q107Transistor2SC2240-GRJ31-02240-00TO92/100/ECB Q108Transistor2SA970-GRJ31-00970-00TO92/100/ECB Q109TransistorKSA1220AYSTU31-01220-00TO126/90/ECB Q111Transistor2SA970-GRJ31-00970-00TO9

27、2/100/ECB Q112Transistor2SC2240-GRJ31-02240-00TO92/100/ECB Q113Transistor2SC2240-GRJ31-02240-00TO92/100/ECB Q114Transistor2SC2240-GRJ31-02240-00TO92/100/ECB Q115Transistor2SA970-GRJ31-00970-00TO92/100/ECB Q116Transistor2SA970-GRJ31-00970-00TO92/100/ECB Q117Transistor2SC2240-GRJ31-02240-00TO92/100/EC

28、B Q118Transistor2SA1015-GR31-01015-00TO92/100/ECB Q119Transistor2SA1013-OJ31-01013-00TO92/100/ECB Q120Transistor2SC2383-OJ31-02383-00TO92/100/ECB Q121Transistor2SC1815-GR31-01815-00TO92/100/ECB Q122Transistor2SA970-GRJ31-00970-00TO92/100/ECB Q129Transistor2SA970-GRJ31-00970-00TO92/100/ECB Q130Transi

29、stor2SC2240-GRJ31-02240-00TO92/100/ECB Q131TransistorKSA1220AYSTU31-01220-00TO126/90/ECB Q132TransistorKSC2690AYSTU31-02690-00TO126/90/ECB - 19 - ELECTRICAL PARTS LIST RadioFans.CN 收音机爱 好者资料库 DESIGNATORDESCRIPTIONPART TYPEPART NUMBERFOOTPRINT Q133TransistorKSC2690AYSTU31-02690-00TO126/90/ECB Q135Tra

30、nsistorKSC2690AYSTU31-02690-00TO126/90/ECB Q136TransistorKSC2690AYSTU31-02690-00TO126/90/ECB Q137TransistorKSA1220AYSTU31-01220-00TO126/90/ECB Q138TransistorKSA1220AYSTU31-01220-00TO126/90/ECB Q139Transistor2SA2121-OJ31-02121-00TO264/215/BCE Q140Transistor2SA2121-OJ31-02121-00TO264/215/BCE Q141Trans

31、istor2SA2121-OJ31-02121-00TO264/215/BCE Q142Transistor2SA2121-OJ31-02121-00TO264/215/BCE Q143Transistor2SC5949-OJ31-05949-00TO264/215/BCE Q144Transistor2SC5949-OJ31-05949-00TO264/215/BCE Q145Transistor2SC5949-OJ31-05949-00TO264/215/BCE Q146Transistor2SC5949-OJ31-05949-00TO264/215/BCE Q147TransistorM

32、PSA9231-00092-00TO92/100/EBC Q148Transistor2SC2240-GRJ31-02240-00TO92/100/ECB Q149TransistorMPSA9231-00092-00TO92/100/EBC Q150TransistorMPSA9231-00092-00TO92/100/EBC Q151Transistor2SC1815-GR31-01815-00TO92/100/ECB Q152TransistorKSC2690AYSTU31-02690-00TO126/90/ECB THERMAL SWITCH CB101THERMAL CIRCUIT

33、BRAKEST-22 90C L TYPEJA07-70022-09TO220AC/SURFACE CB102THERMAL CIRCUIT BRAKEST-22 80C L TYPEJA07-70022-08TO220AC/SURFACE IC IC101Shunt RegulatorTL43103-00431-02TO-92 IC102Shunt RegulatorTL43103-00431-02TO-92 IC103Shunt RegulatorTL43103-00431-02TO-92 IC104QUAD OP-AMPTL084CN03-00084-00DIP.100/14/W.300

34、/L.750 RESISTOR R101Metal Film Resistor475, 1/6W, 1%07-24750-50AX/.200X.080/.031 R102Metal Film Resistor10K, 1/6W, 1%07-21002-50AX/.200X.080/.031 R103Metal Film Resistor549, 1/6W, 1%07-25490-50AX/.200X.080/.031 R104Metal Film Resistor1K, 1/6W, 5%07-20102-50AX/.200X.080/.031 R105Metal Film Resistor10

35、0, 1/6W, 5%07-20101-50AX/.200X.080/.031 R106Metal Film Resistor24K, 1/6W, 5%07-20243-50AX/.200X.080/.031 R107Metal Film Resistor100, 1/6W, 5%07-20101-50AX/.200X.080/.031 R108Metal Film Resistor100, 1/6W, 5%07-20101-50AX/.200X.080/.031 R109Metal Film Resistor24K, 1/6W, 5%07-20243-50AX/.200X.080/.031

36、R110Metal Film Resistor1K, 1/6W, 5%07-20102-50AX/.200X.080/.031 R111Metal Film Resistor100, 1/6W, 5%07-20101-50AX/.200X.080/.031 R112Metal Film Resistor39K, 1/6W, 5%07-20393-50AX/.200X.080/.031 R113Metal Film Resistor220K, 1/6W, 5%07-20224-50AX/.200X.080/.031 R114Metal Film Resistor82, 1/6W, 5%07-20

37、820-50AX/.200X.080/.031 R115Metal Film Resistor15, 1/6W, 5%07-20150-50AX/.200X.080/.031 R116Metal Film Resistor24K, 1/6W, 5%07-20243-50AX/.200X.080/.031 R117Metal Film Resistor15, 1/6W, 5%07-20150-50AX/.200X.080/.031 R118Metal Film Resistor220K, 1/6W, 5%07-20224-50AX/.200X.080/.031 R119Metal Film Re

38、sistor39K, 1/6W, 5%07-20393-50AX/.200X.080/.031 R120Metal Film Resistor82, 1/6W, 5%07-20820-50AX/.200X.080/.031 R121Metal Film Resistor82, 1/6W, 5%07-20820-50AX/.200X.080/.031 R122Metal Film Resistor100K, 1/6W, 5%07-20104-50AX/.200X.080/.031 R123Metal Film Resistor82, 1/6W, 5%07-20820-50AX/.200X.080

39、/.031 R124Metal Film Resistor100K, 1/6W, 5%07-20104-50AX/.200X.080/.031 R125Metal Film Resistor200, 1/6W, 5%07-20201-50AX/.400X.100/.031 R126Metal Film Resistor10, 1/6W, 5%07-20100-50AX/.200X.080/.031 - 20 - ELECTRICAL PARTS LIST RadioFans.CN 收音机爱 好者资料库 DESIGNATORDESCRIPTIONPART TYPEPART NUMBERFOOTP

40、RINT R127Metal Film Resistor10, 1/6W, 5%07-20100-50AX/.200X.080/.031 R128Metal Film Resistor10, 1/6W, 5%07-20100-50AX/.200X.080/.031 R129Metal Film Resistor10, 1/6W, 5%07-20100-50AX/.200X.080/.031 R130Metal Film Resistor1K, 1W, 1%07-21001-01AX/.600X.125/.039 R132Metal Film Resistor2K2, 1/6W, 5%07-20

41、222-50AX/.200X.080/.031 R133Metal Film Resistor2.7K, 1/6W, 5%07-20272-50AX/.200X.080/.031 R135Metal Film Resistor2K2, 1/6W, 5%07-20222-50AX/.200X.080/.031 R136Metal Film Resistor1K, 1/6W, 1%07-21001-50AX/.200X.080/.031 R137Metal Film Resistor1.5K, 1/6W, 1%07-21501-50AX/.200X.080/.031 R138Metal Film Resistor10K, 1/6W, 1%07-21002-50AX/.200X.080/.031 R139Metal Film Resistor36K, 1/6W, 1%07-23602-50AX/.200X.080/.031 R140Metal Oxide Film Resistor3.9K, 3W, 5%07-30392-03AX/.600X.125/.039 R141Metal Oxide Film Resistor3.9K, 3W, 5%07-30392-03AX