NAD-C325BEE-int-sm维修电路原理图.pdf

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1、NAD SERVICE MANUAL C 325BEE STEREO AMPLIFIER C 325BEE STEREO AMPLIFIER 1 RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS DESCRIPTION P A G E SERVICE CAUTION3-4 REAR PANEL/FRONT PANEL VIEW.5 SPECIFICATIONS.6-7 WIRING DIAGRAM8 BLOCK DIAGRAM. .9-14 ALIGNMENT PROCEDURE.15 SCHEMATICS.16-19 PCB LAYOUT 20-23 TRO

2、UBLE SHOOTING GUIDE.24 ELECTRICAL PARTS LIST.25-34 EXPLODED VIEW.35 EXPLODED VIEW PARTS LIST.36 2 PROTECT IC CHANGE .37 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

3、 APPROVAL. UNAUTHORIZED MODIFICATIONS 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 O

4、THERWISE, INCREASES THE RISK 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 1

5、0 WATT RESISTOR, PARALLELED 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 VO

6、LTAGE MEASUREMENTS FOR EACH 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 INSTALLATIO

7、N 1. NEVER INSTALL ANY PRODUCT 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

8、A FACTOR, ETC. 3. AVOID PLACEMENT 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 MOUNT

9、ING INSTRUCTIONS A PRODUCT 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.

10、 CAUTION CUSTOMERS AGAINST 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 T

11、HRESHOLDS OR DEEP PILE CARPETS. 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 CUSTO

12、MERS AGAINST THE USE OF EXTENSION 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

13、“DANGEROUS VOLTAGE” WITHIN 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 LITE

14、RATURE ACCOMPANYING THE APPLIANCE. 3 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

15、and 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

16、 other 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

17、 an 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 compara

18、ble 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 i

19、ts 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 Di

20、sconnect 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 :

21、Accessible 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. Examp

22、les 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

23、semiconductor-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 tes

24、t. 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 anti

25、static 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 de

26、vice 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

27、 the 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 unpackag

28、ed 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 ? ? ? ? ? ? INPUT ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? LED ? ? ? ? 5 SPECIFICATIO

29、NS POWER AMPLIFIER SECTION STEREO MODE CONTINUOUS AVERAGE POWER50 W (17 dBW) OUTPUT INTO 8 OHMS OR 4 OHMS (Min. power per channel, 20 Hz 20 kHz, with no more than rated distortion) Rated Distortion0.03% (THD 20 Hz 20 kHz) Clipping power 68 W (maximum continuous power per channel 4 and 8). IHF dynami

30、c headroom: at 8 ohms+ 3.4 dB at 4 ohms+ 5.0 dB IHF dynamic power (maximum short term power per channel) 8 ohms:110 W (20.4 dBW) 4 ohms:160 W (22.0 dBW) 2 ohms:210 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

31、)630 mV Voltage gain29 dB Frequency response 20 Hz 20 kHz0.2 dB Signal / Noise ratio, A-weighted100 dB ref. 1 W 117 dB ref. 50 W THD + Noise 0.03% (Total Harmonic 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 r

32、ated output) IHF I.M. 0.01% (CCIF IM Distortion, 19 + 20 kHz at rated output) Headphones Output Impedance220 ohms 6 PREAMPLIFIER SECTION LINE LEVEL INPUTS (Disk, CD, Video, Auxiliary, Tuner, Tape 1,Tape 2) Input impedance (R and C) 200 kohms + 320 pF Input sensitivity (ref. rated power) 220 mV Maxim

33、um input signal 6 V Signal / Noise ratio, A-weighted 93.0 dB ref. 1W (from CD Input to Speakers Output, Volume Setting for 500mV in , 8ohms 1W out) Signal to noise ratio preamp out, IHF “A” weighted 106 dB re 500mV Frequency response, 20 Hz 20 kHz +/-0.1 dB (tone defeat on) +/-0.5 dB (tone defeat of

34、f) THD + Noise, SMPTE IM 12 V Tape-out: 10 V CONTROLS Treble +/- 5 dB at 10 kHz Bass +/- 8 dB at 100 Hz IR IN and OUT Input Resistance 10 kohms Input VoltageMin 5 V Output Resistance 30 ohms TRIGGER Out Output Current50 mA Output Voltage12 V DIMENSIONS AND WEIGHTS Net Weight6.5 kg ( 14.3 Ib) Shippin

35、g Weight 8 kg ( 17.6 Ib) DIMENSION (WHD) 435 100 290MM 7 +46V RED Ipod SOCKET BOARD -46V WHITE CB11 P5-GND +46V RED CB33 -46V WHITE CB52 CB53 CB58 HEADPHONE BOARD STANDBY BOARD CZ45 POWER BOARD CZ72 IR BOARD CB54 Q115 P4-R P3-R CB55 CB57 CB59 CB56 CB51 OUT MODULE BOARD CB73 CB74 S72 S71S73S74 S76 S7

36、5 CZ73 CB72 CZ71 S77 CZ72_1 CB61CB61 CZ74 CZ75 KEY BOARD AMP-SMD-R BOARD IN MODULE BOARD AMP-SMD-L BOARD CB32CB21 CZ11CZ21 CB34 CB31 CB35 MAIN BOARD T401(TRANSFORMER) P1-L CB47 Q114 Q214 P2-L Q215 CB45 POWER SWITCH WIRING DIAGRAM AC POWER PLUG AC OUTLET 8 01-32560-02 01-32560-01 TAPE1 OUT L INPUT SE

37、LECTION CIRCUIT (BY RELAY) DISC L DISC R CD R VIDEO R AUX R TAPE1 IN R TAPE1 IN L AUX L VIDEO L CD L IC 75 CD4094 MCU PREAPM MODULE AMP CIRCUIT IN? BASS RT31 RT32 RT34 TREBLE BALANCE SW31 TONE DEFEAT RT33 VOLUME MUTE MUTE Q31 PRE-OUT L Q32 PRE-OUT R MAIN IN R MAIN IN L SOFT CLIPPING CONTROL CIRCUIT

38、S41 POWER AMP CIRCUIT L CIRCUIT R POWER AMP PROTECTION CIRCUIT (IC44,UPC1237HA) RL12/2 ISC CIRCUIT (IC43,TL082D) TRIGI-V MIRROR SOURCE SCR CIRCUIT (1,2,3) 4 5 VOL- VOL+ VOLUME CONTROL CIRCUIT (REMOTE) MUTE CIRUIT JK41 R467 POSISTOR (80 DEGREE C) R439 POSISTOR (90 DEGREE C) BLOCK DIAGRAM HEADPHONE TU

39、NER R TUNER L CONTROL CURRENT CIRCUIT CONTROL CONTROL MP R MP L TAPE2 IN L TAPE2 IN R TAPE2 OUT R TAPE2 OUT L TAPE1 OUT R Relay Switchs IC74 CD4094 MCU (1,3) 92 (4,5,6,7 11,12,13,14) PREAPM MODULE AMP CIRCUIT OUT? Speaker R Speaker L F1AA012V 9 01-32560-02 01-32560-01 2 3 1 IC72 IS1U60L +5V +5V 13 2

40、 IC76 TCM810MEND IR OUT CIRCUIT IR IN CIRCUIT 10k 10K 2K2 Q717 +5V Sandby control line 18V Power Supply Circuit 27pF MICROPROCESSOR CONNECTION DIAGRAM +5V RST/VPP 1 P3.0(RXD) 2 P3.1(TXD) 3 XTAL2 4 XTAL1 5 P3.2(INTO) 6 P3.3(INT1) 7 P3.4 8 P3.5 9 GND 10 P3.7 11 (AIN0)P1.0 12 (AIN1)P1.1 13 P1.2 14 P1.2

41、 15 P1.4 16 P1.5 17 P1.6 18 P1.7 19 VCC 20 IC73 AT89C4051 NC 1 NC 2 NC 3 Vss 4 SDA 5 SCL 6 NC 7 Vcc 8 IC71 24C01 C79 C710 27pF Y71 11.0592M Q1 4 Q2 5 Q3 6 Q4 7 Q5 14 Q6 13 Q7 12 Q8 11 QS 9 QS 10 STR 1 D 2 CLK 3 OE 15 VCC 16 VEE 8 IC74 4094 Q1 4 Q2 5 Q3 6 Q4 7 Q5 14 Q6 13 Q7 12 Q8 11 QS 9 QS 10 STR 1

42、 D 2 CLK 3 OE 15 VCC 16 VEE 8 IC75 4094 C TU TA2 TA1 DI IP VI AU TO RELAY CONTROL CIRCUITTO VOL CONTROL CIRCUIT PHONE71 Ipod IN Input selection Keys +5V +5V 10k +5V IR Flash Mute Flash Remote Mute Flash 10 TL082D MAIN BOARDIC41 PCB-7: IN MODULE 29 Line Out: 01-32560-02 and Line In: 01-32560-01 C65,

43、C66, C67, C6824-10461-000.1uF, 63V, 20% RESISTORS R617, R618, R619, R62007-20100-5010?, 1/6W, 5% R615, R61607-20330-5033?, 1/6W, 5% R61, R6207-20221-50220?, 1/6W, 5% R69, R61007-24300-50430?, 1/6W, 1% R67, R68, R611, R61207-20102-501K?, 1/6W, 5% R613, R61407-20103-5010K?, 1/6W, 5% R62107-20303-5130K

44、?, 1/4W, 5% R63, R6407-20105-501M?, 1/6W, 5% CONNECTER S00613-12509-01CZ61 J6121-06000-00L=5 CIRCUIT NO. PART NO.DESCRIPTION TRANSISTORS Q2631-01015-012SA1015 Q2731-01815-012SC1815 Q22, Q25, R202, Q20431-01312-002SA1312-GR Q23, Q24, Q201, Q20331-03324-002SC3324-GR Q2831-00647-002SB647A Q2931-00667-0

45、02SD667A DIODES D23, D24, D25, D2633-44148-11LL4148 RESISTORS R254, R25507-90100-0110?, 5% R215, R21607-91509-0115?, 1% R24907-96809-0168?, 1% R203, R206, R219, R22007-98209-0182?, 1% R211, R212, R25907-91000-01100?, 1% R26907-93300-01330?, 1% R29, R201, R205, R21007-93902-0139K?, 1% R22307-94702-01

46、47K?, 1% R221, R22207-91003-01100K?, 1% R202, R20407-92203-01220K?, 1% CAPACITORS C28, C2926-39051-0139pF, 50V, 5% C22, C22426-10251-111nF, 50V, 5% C23, C2406-10031-02VSS, 10uF, 35V, 20% C203, C20406-22011-05VSS, 22uF, 16V, 20% INDUCTORS L2208-04101-00100uH CONNECTER S00613-12508-11CZ21 CIRCUIT NO.

47、PART NO.DESCRIPTION TRANSISTORS Q1631-01015-012SA1015 Q1731-01815-012SC1815 Q12, Q15, Q102, Q10431-01312-002SA1312-GR Q13, Q14, Q101, Q10331-03324-002SC3324-GR Q1831-00647-002SB647A Q1931-00667-002SD667A DIODES D13, D14, D15, D1633-44148-11LL4148 RESISTORS R154, R15507-90100-0110?, 5% R115, R11607-9

48、1509-0115?, 1% R14907-96809-0168?, 1% R103, R106, R119, R12007-98209-0182?, 1% R111, R112, R15907-91000-01100?, 1% PCB-4: AMP MODULE L SMD PCB-5: AMP MODULE R SMD 01-32520-02 30 01-32520-01 R16907-93300-01330?, 1% R19, R101, R105, R11007-93902-0139K?, 1% R12307-94702-0147K?, 1% R121, R12207-91003-01100K?, 1% R102, R10407-92203-01220K?, 1% CA