NAD-C355BEE-int-sm维修电路原理图.pdf

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1、NAD SERVICE MANUAL C 355BEE STEREO AMPLIFIER C 355BEE STEREO AMPLIFIER RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS DESCRIPTION P A G E SERVICE CAUTION.3-4 REAR PANEL/FRONT PANEL VIEW.5 SPECIFICATIONS6-7 WIRING DIAGRAM8 BLOCK DIAGRAM. .9-13 ALIGNMENT PROCEDURE.14 SCHEMATICS.15-18 PCB LAYOUT.19-22 TROUB

2、LE SHOOTING GUIDE.23 ELECTRICAL PARTS LIST.24-33 EXPLODED VIEW.34 EXPLODED VIEW PARTS LIST.35 RadioFans.CN 收音机爱 好者资料库 PRODUCT SAFETY SERVICING GUIDELINES CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFACTURERS APPROVAL. UNAUTHORIZED MO

3、DIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANY RESULTING PROPERTY DAMAGE OR USER INJURY. SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND SERVICING GUIDELINES. TO DO OTHERWISE, INCREASES THE RI

4、SK OF POTENTIAL HAZARDS AND INJURY TO THE USER. WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTECTION FROM AC LINE SHOCK. SAFETY CHECKS AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRECTED. A CHECK SHOULD BE MADE OF THE FOLLOWING. SUBJECT : FIRE CONNECT A 1500 OHM 10 WATT RESISTOR, PARALLELE

5、D BY A .15 MFD, 150V AC TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CONDUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME. MEASURE THE AC VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE AC PLUG AND REPEAT AC VOLTAGE MEASUREMENTS FOR EAC

6、H EXPOSED METALLIC PART. VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP AC ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY. SUBJECT : GRAPHIC SYMBOLS SUBJECT : TIPS ON PROPER INSTALLATION 1. NEVER INSTALL ANY PRO

7、DUCT IN A CLOSED-IN RECESS, CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATED AIR FLOW. 2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIATORS WHERE STEAM LEAKAGE IS A FACTOR, ETC. 3. AVOID PL

8、ACEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DECORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHT OBSTRUCT VENTILATION. 4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMERCAL MOUNTING KIT MUST FOLLOW THE FACTORY APPROVED MOUNTING INSTRUCTIONS A PRODUCT

9、 MOUNTED TO A SHELF OR PLATFORM MUST RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN SPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERS MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS. 5. CAUTION CUSTOMERS AGAINST

10、 THE MOUNTING OF A PRODUCT ON SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS PROPERLY SECURED. 6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITS MOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZARDS OF TRYING TO ROLL A CART WITH SMALL CASTERS ACROSS THRESHOLDS OR DEEP PILE CAR

11、PETS. 7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.S OF THE SAME OR LARGER SCREEN SIZE. 8. CAUTION CUSTOMERS AGAINST THE USE OF EX

12、TENSION CORDS, EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SINGLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND FAMILY. THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” WITHIN

13、 THE PRODUCTS ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE AP

14、PLIANCE. 3 RadioFans.CN 收音机爱 好者资料库 SERVICING PRECAUTIONS CAUTION : Before servicing the A/V Receiver covered by this service data and its supplements and addends, read and follow the SAFETY PRECAUTIONS. NOTE : if unforeseen circumstances create conflict between the following servicing precautions an

15、d any of the safety precautions in this publication, always follow the safety precautions. Remember Safety First: General Servicing Precautions 1. Always unplug the A/V Receiver AC power cord from the AC power source before: (1) Removing or reinstalling any component, circuit board, module, or any o

16、ther assembly. (2) Disconnecting or reconnecting any internal electrical plug or other electrical connection. (3) Connecting a test substitute in parallel with an electrolytic capacitor. Caution : A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in a

17、n explosion hazard. 2. Do not spray chemicals on or near this A/V Receiver or any of its assemblies. 3. Unless specified otherwise in this service data, clean electrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner, cottontipped swab, or comparabl

18、e soft applicator. Unless specified otherwise in this service data, lubrication of contacts is not required. 4. Do not defeat any plug/socket B+ voltage interlocks with which instruments covered by this service manual might be equipped. 5. Do not apply AC power to this A/V Receiver and/or any of its

19、 electrical assemblies unless all solid-state device heat sinks are correctly installed. 6. Always connect test instrument ground lead to the appropriate ground before connecting the test instrument positive lead. Always remove the test instrument ground lead last. Insulation Checking Procedure Disc

20、onnect the attachment plug from the AC outlet and turn the power on. Connect an insulation resistance meter(500V) to the blades of the attachment plug. The insulation resistance between each blade of the attachment plug and accessible conductive parts (Note 1) should be more than 1M-ohm. Note 1 : Ac

21、cessible Conductive Parts including Metal panels, Input terminals, Earphone jacks, etc. Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Example

22、s of typical Es devices are integrated circuits and some field effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor component or se

23、miconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test.

24、 2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. Use only an antist

25、atic solder removal device. Some solder removal devices not classified a “anti-static” can generate electrical charges sufficient to damage ES devices. 5. Do not use freonpropelled chemicals. These can generate electrical charge sufficient to damage ES devices. 6. Do not remove a replacement ES devi

26、ce from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil, or comparable conductive material). 7. lmmediately before removing the protective material from t

27、he leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution : Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handing unpackaged

28、 replacement ES devices. (Normally harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device.) 4 RadioFans.CN 收音机爱 好者资料库 INPUT (TAPE MONITOR) 16. RS- 232 INPUT 17. PRE OUT 1

29、 18. ON OFF POWER (AC) SWITCH (2) LED 5 12 31157910 468 11. SPEAKERS A & B 1614123418567 81791012111513 RadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS POWER AMPLIFIER SECTION STEREO MODE CONTINUOUS AVERAGE POWER 80 W (19 dBW) OUTPUT INTO 8 OHMS OR 4 OHMS (Min. power per channel, 20 Hz 20 kHz, with no more t

30、han rated distortion) Rated Distortion0.02% (THD 20 Hz 20 kHz) Clipping power 90 W (maximum continuous power per channel 4 and 8). IHF dynamic headroom: at 8 ohms+ 2.4 dB at 4 ohms+ 4.4 dB IHF dynamic power (maximum short term power per channel) 8 ohms:160 W (20.4 dBW) 4 ohms: 220 W (22.0 dBW) 2 ohm

31、s:270 W (23.2 dBW) Damping factor 100 (ref. 8 ohms 1 kHz) Input ImpedanceR = 20 kohms C = 1 nF Input sensitivity (for rated output into 8 ohms) 950 mV Voltage gain29 dB Frequency response 20 Hz 20 kH 0.1 dB Signal / Noise ratio, A-weighted100 dB r ef. 1 W 119 dB r ef. 50 W THD + Noise 0.02% (Total H

32、armonic Distortion, 20 Hz 20 kHz, from 250 mW to rated output) SMPTE I.M. 0.01% (Intermodulation Distortion, 60 Hz + 7 kHz, 4:1, from 250 mW to rated output) IHF I.M. 0.01% (CCIF IM Distortion, 19 + 20 kHz at rated output) Headphones Output Impedance220 ohms 6 RadioFans.CN 收音机爱 好者资料库 PREAMPLIFIER SE

33、CTION LINE LEVEL INPUTS (Disk, CD, Video, Auxiliary, Tuner, Tape 1,Tape 2) Input impedance (R and C) 200 kohms + 100 pF Input sensitivity (ref. rated power) 310 mV Maximum input signal 6 V Signal / Noise ratio, A-weighted 97.0 dB r ef. 1W (from CD Input to Speakers Output, Volume Setting for 500mV i

34、n , 8ohms 1W out) Signal to noise ratio preamp out, IHF “A” weighted 110 dB r e 500mV Frequency response, 20 Hz 20 kHz +/-0.1 dB (tone defeat on) +/-0.2 dB (tone defeat off) THD + Noise, SMPTE IM 11 V Tape-out: 10 V CONTROLS Treble +/- 5 dB at 10 kHz Bass +/- 8 dB at 100 Hz IR IN and OUT Input Resis

35、tance 10 kohms Input VoltageMi n 5 V Output Resistance CONTROL LOGIC X REDOCED SLAVE ADDRESS REGISTER & COMPARATOR WORD ADDRESS COUNTER HIGH VOLTAGE GENERATOR, TIMING & CONTROL EEPROM ARRAY Y DECODER DATA REGISTER Clock DI/O ACK 8 5 6 7 4GND WP SCL SDA Vcc nMOS FUNCTIONAL BLOCK DIAGRAM 1 2 3 45 6 7

36、8 NC NC NC VSS VCC NC SCL SDA 13 RadioFans.CN 收音机爱 好者资料库 ALIGNMENT PROCEDURES I. INITIAL A. LOWEST VOLUME ADJUSTMENT 3. Connect a oscilloscope t o L channel binding post s. 1. Tune t he volume pot t o lowest st at e. 2. Input a high volt age signal such as 5V from CD input . 4. Observing t he oscill

37、oscope,adjust VR301,make t he out put of speakers become t o t he 5. Adjust ing VR302,make R channel out put become t o t he lowest level by same way. B. IDLING CURRENT 3. Connect a DC volt met er t oTP1 and TP2 ,adjust VR22/VR23 for 6mV reading on volt met er. 4. Connect a DC volt met er t oTP3 and

38、 TP4 ,adjust VR12/VR13 for 6mV reading on volt met er. 1. Power on II. FINAL ADJUSTMENT Repeat procedure A,B and C for t he lowest volume level, idling current alignment and ISC original level respect ively. TP1 TP2 TP3 TP4 VR22 VR12 VR301VR302 MAIN BOARD lowest level. C355BEE VR3 TP10TP11 C. ISC CI

39、RCUIT ORIGINAL ADJUSTING Adjust t he pot VR3 t o make t he DC volt age of t he point of TP10 t o t he same as TP11 2. Running 5 minut es wit h no signal VR23 VR13 VR304VR304 14 RadioFans.CN 收音机爱 好者资料库 .RIC REWOP EEB553C DAN 15C V052/n01 15D D8UBK 25C V052/n01 55D D8UBK 715C %01 V36/Fu00022 815C %01

40、V36/Fu00022 135D R005-151TB 235D R005-151TB 855R K1 365R K22 165R 001 265R K1 065R K1 955R K1 565R 001 465R K22 135R EC %5 W5/50.0 235R 022 435R 2K2 335R M1 665R 7K4 445R K22 325C V05/u0033 425C V05/u0022 ! 15F25F45F35F V55+ V55- V44- V44+ V-I .TED CA GIRT %01 %01 4X V052/A3.6 1 2 3 4 5 6 7 15BC 7NO

41、C V8 V0 1 2 3 4 5 6 7 35BC 65D 401BD V14 V14 V0 V5 . 13 V5 . 13 ETIHW DER 915Q 5101A 025Q 5181C 95Q 5101A 015Q 5101A 715Q 5101A 815Q 5181C 1 2 45BC 765R K033 V44+ V44- 1 2 25BC 1 2 3 55BC 3NOC 1 2 3 65BC 3NOC 1 3 75BC 3NOC V55- V55+ 35C V004/Fn7.4 45C Fu33.0 1 2 85BC DER ETIHW )no i sreV CAV021 roF(

42、 DROC REWOP CA 25WS HCTIWS REWOP 1 2 3 55ZC 1 2 3 95BC 3NOC ! 1 2 3 65ZC 3NOC 104T DER YRG KLB GRO OIV ! 1 2 3 4 5 6 7 15ZC 7NOC 1 2 3 75ZC 3NOC remrof snarT 1 2 3 95ZC 3NOC 1 1 2 2 tel tuo CA 55F Am005 25D 401BD 525C V61/Fu0074 625C Fu001 3 1 2 15CI 0.5-7111SMAV5+ ! 315D 4004N1 gniR eti r reF 21*51

43、*52 ! ! otni 031.10S rekaerb l amreht a tresnI remrof snar t fo renni eht )4/1(MARGAID SCITAMEHCS 0.1mV TIUCRIC YLPPUS REWOP 0.1mV DRAOB REWOP:2-BCP 15 RadioFans.CN 收音机爱 好者资料库 C66 0. 1u 20% R620 10 1 2 3 4 5 6 7 8 9 CZ61 CON9 GND +18V - 18V LOUT ROUT RIN- RIN+ LIN+ LIN- C62 220p R62 220 R64 2. 2M 26

44、Q RG 902KS2 R68 1K R610 430 2% Q65 A1312- GR 86Q Y-1882CS2 C64 22p R612 1K Q66 2SA1201- Y R614 10K R616 10 C67 0. 1u 20% C68 0. 1u 20% C610 100p R617 10 Q69 C3324- GR Q611 C3324- GR R622 1K R624 620 C612 1nF R619 10 C61 220p R61 220 R63 2. 2M 16Q RG 902KS2 R67 1K R69 430 2% Q63 A1312- GR Q67 2SC2881

45、- Y C63 22p R611 1K 46Q Y-1021AS2 R613 10K R615 10 C65 0. 1u 20% C69 100p R618 10 Q610 C3324- GR 216Q RG-4233C R623 1K R625 620 C613 1nF RCA31A DISC RCA31C CD RCA31E VIDEO RCA32A AUX RCA32C TUNER RCA32E TAPE2 RCA33E REC1 RCA33C TAPE1 RCA33A REC2 R31 470 R33 470 R35 470 C31 100p C33 100p C35 100p R37

46、 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/35 C323 47u/35 C325 47u/25 R321 3K3 MF R323 750 MF R319 N. I. R325 390 MF R327 180 MF C327 22n 5% C329 0. 1u 5% R329 1K5 MF R331 390 MF u22.0133C333C %5,V36,u1 C335 N. I

47、. 1 2 3 SW31A 4 5 6 SW31B RCA34A Pre- out 1 L C339 1u/16 RL31B RL32B RL33B RL34B RL35B RL36B RL37B RL38B RCA31B DISC RCA31D CD RCA31F VIDEO RCA32B AUX RCA32D TUNER RCA32F TAPE2 RCA33F REC1 RCA33D TAPE1 RCA33B REC2 R32 470 R34 470 R36 470 C32 100p C34 100p C36 100p R38 470 R310 470 R312 470 C38 100p

48、C310 100p C312 100p R314 470 R316 470 R318 470 C314 100p C316 100p C318 100p RL31A RL32A RL33A RL34A RL35A RL36A RL37A RL38A 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 C328 22n 5% C330 0. 1u 5% R330 1K5 MF R332 390 MF 233C %5 u22.0 433C %5,V36,u1 C336 N. I. RCA34B Pre- out 1 R C340 1u/16 TONE DEFEAT SW R334 4. 7K R336 68 C342 47u/25 R407 1K R402 10K R404 10K R403 1K R405 1K R406 1K C417 4u7/25V C418 4u7/25V RL31CRL32CRL33CRL34CRL35