NAD-CI940-pwr-sm维修电路原理图.pdf

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1、NAD SERVICE MANUALCI 940 MULTI-CHANNEL AMPLIFIER CI 940 MULTI-CHANNEL AMPLIFIER RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS DESCRIPTION P A G E SERVICE CAUTION.3-4 SPECIFICATIONS.5 WIRING DIAGRAM.6 PCB LAYOUT.17-20 EXPLODED VIEW PARTS LIST.37 CIRCUIT DIAGRAMS. TROUBLE SHOOTING GUIDE.10 EXPLODED VIEW .

2、36 .11-16 ELECTRICAL VIEW PARTS LIST.21-35 BLOCK DIAGRAM.7-9 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 MODIFICATIONS WILL NOT ONLY VOID TH

3、E 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 RISK OF POTENTIAL HAZARDS AND INJUR

4、Y 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, PARALLELED BY A .15 MFD, 150V AC TYPE CAPA

5、CITOR 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 EACH EXPOSED METALLIC PART. VOLTAGE

6、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 PRODUCT IN A CLOSED-IN RECESS, CUBBY

7、HOLE 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 PLACEMENT WHERE DRAPERIES MAY OBSTR

8、UCT 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 MOUNTED TO A SHELF OR PLATFORM M

9、UST 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 THE MOUNTING OF A PRODUCT ON SLO

10、PING 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 CARPETS. 7. CAUTION CUSTOMERS AGAINS

11、T 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 EXTENSION CORDS, EXPLAIN THAT A FOR

12、EST 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 THE PRODUCTS ENCLOSURE THAT MAY

13、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 APPLIANCE. 3 RadioFans.CN 收音机爱 好者资料

14、库 SERVICING PRECAUTIONS CAUTION : Before servicing the poweramplifier 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 and any of the safety precautions

15、 in this publication, always follow the safety precautions. Remember Safety First: General Servicing Precautions 1. Always unplug the poweramplifier AC power cord from the AC power source before: (1) Removing or reinstalling any component, circuit board, module, or any other assembly. (2) Disconnect

16、ing 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 an explosion hazard. 2. Do not

17、 spray chemicals on or near this poweramplifier 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 comparable soft applicator. Unless s

18、pecified 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 poweramplifier and/or any of its electrical assemblies un

19、less 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 Disconnect the attachment plu

20、g 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 : Accessible Conductive Parts

21、 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. Examples of typical Es devices a

22、re 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 semiconductor-equipped asse

23、mbly, 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. 2. After removing an ele

24、ctrical 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 antistatic solder removal devic

25、e. 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 device from its protective pa

26、ckage 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 the leads of a replacement

27、 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 replacement ES devices.

28、(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 SPECIFICATIONS ENGLISHFRANAISESPAOLDEUTSCHNEDERLANDSSVENSKA 5 CI 940 Continuo

29、us Output Power 8 Ohms/4 Ohms 8 Ohms in Bridge Mode 4 x 35W (ref. rated THD, 20Hz-20kHz, all channels driven) 2 x 70W Rated THD (250mW to rated power, CCIF IMD, DIM 100)0.03% (ref. 20Hz-20kHz) IHF Dynamic Power 8 ohms 4 ohms 2 ohms 55W 85W 95W Damping Factor180 (ref. 8 ohms, 50Hz and 1kHz) Input Sen

30、sitivity270mV (ref. rated power) Voltage Gain35dB Frequency Response0.2dB (ref. 20Hz-20kHz) -3dB at 3Hz and 100kHz Signal/Noise Ratio, A-Weighted95dBA (ref. 1W) 110dB (ref. 35W) Trigger5-30V In (AC/DC) -52dBV, 12V Out Time to Automatic Standby (without signal at input sense mode)10 minutes GENERAL R

31、ated Power270W (120V 60Hz, 230V 50Hz) Idle Power55W Standby power2 3 0VD C G N D 9PIN2.0M M R964 180K R955 180K R972 1K R971 10K Q956 BC817-40 R973 470K R974 220K C957 4U7 RadioFans.CN 收音机爱 好者资料库 1.MAIN BOARD 17 PCB LAYOUT Top LayoutBottom Layout RadioFans.CN 收音机爱 好者资料库 2.DISPLAY BOARD AND POWERKEY

32、BOARD 18 Top LayoutBottom Layout 3.INPUT BOARD Top LayoutBottom Layout RadioFans.CN 收音机爱 好者资料库 4.PSU 3XDISPLAY BOARD，6xNTC board A16-94020-21 DISPLAY+Power key BOARD +NTC Board PCB ASSY VM1.0 FR-4,1.6mm,2Layers,1Oz , TG130,TG130, 153160mm PCB-2:DISPLAY BOARD PART NO.DESCRIPTION PCB INFO 01-94002-00C

33、I940 DISPLAY BOARD 02-94002-00CI940 DISPLAY BOARDSMT A16-94002-21 DISPLAY BOARD PCB ASSY VM1.0 FR-4,1.6mm,2Layers,1Oz, TG130, 10642mm 3XPower key BOARD;3XDISPLAY BOARD，6xNTC board A16-94020-21 DISPLAY+Power key BOARD +NTC Board PCB ASSY VM1.0 FR-4,1.6mm,2Layers,1Oz , TG130, 153160mm DIODE D90133-147

34、09-10Zener Diode4V7,1/2W, LL34 Q905, Q906, Q907, Q908, Q909, Q910, Q911 31-00114-01TransistorDTA114EKA D903, D90433-50326-04LED 3,red blue,BL-BUBB5201G-YJ- T05 24 RadioFans.CN 收音机爱 好者资料库 RESISTOR R901, R902, R903, R904, R90707-90103-01Chip Resistor 10K,0805,1/8W,5%,RC0805JR- 0710KL R905, R90607-9047

35、2-01Chip Resistor 4.7K,0805,1/8W, 5%,RC0805JR-074K7L R908, R912, R91307-90102-01Chip Resistor 1K,0805,1/8W,5%,RC0805JR- 071KL R909, R910, R911, R914,R91607-95100-01Chip Resistor 510,0805,1/8W,1%,RC0805FR- 07510RL R915, R91707-95101-01Chip Resistor 5.1K,0805,1/8W, 1%,RC0805FR-075K1L R91807-94701-00Ch

36、ip Resistor 4.7K,0603,1/10W, 1%,RC0603FR-074K7L CAPACTIOR C902 C90926-10451-21Ceramic Chip Capacitor 100nJ,50V,0805,X7R,CC0805JRX 7R9BB104 C903, C90426-22051-01Ceramic Chip Capacitor22PJ,50V,0805,NPO CRYSTAL X90104-11102-01Crystal SMDHLX-M-T-11.0592M-20-TR TRANSISTOR Q901, Q90231-01015-03TransistorA

37、1015, SOT23 Q903, Q90431-01815-03TransistorC1815 SOT23 IC IC90103-00162-01MCUSTC12C5A16S2-35I-LQFP44 FERRITE BEAD L90108-04331-06Ferrite Bead SMD 742792037, 330ohm100MHz, 25%, 2A CAPACTIOR C905, C906,C90706-10051-02Alu Electrolytic CapacitorCD263(X),10uF,50V,20%,105 C90106-10211-05ALU Electrolytic C

38、apacitor CD263X,1000uF,10V,20%,105 ,F5.0 C90825-10461-07 Metallized Polyester Film Capacitor CL23B-63V-104JR, C241J104J20A201 CONNECTOR P901A14-94011-00ConnectorUL2468#24AWG*11P, L=160mm J90113-12504-28Connector 2.54mm pitch,4pin,CNT-M254- 1*4-GS-5/3-N JA2013-22505-00ConnectorXHB 2.5A-5A/TJC3-5A PCB

39、-3:INPUT BOARD PART NO.DESCRIPTION PCB INFO 01-94003-00Input Board 02-94003-00Input BoardSMT A16-94003-22Input Board PCB VM1.1, FR-4,1.6mm,2Layers,1Oz, ,TG130 2xInput boardA16-94030-22Input Board PCB ASSY 2-1,VM1.1 FR- 4,1.6mm,2Layers,1Oz, TG130, 132128mm DIODE DA05, DA06, DA0733-40352-01Diodes1SS35

40、2 DA01, DA0233-40099-04Switch DiodeBAV99 D2002, D200533-40021-11Switch DiodeBAV21W,SOD123 DA03, DA0433-12009-10Zener Diode SMD2V, 1/2W , LL34 25 RadioFans.CN 收音机爱 好者资料库 RESISTOR RA06,RA07,RA2907-91001-00Chip Resistor1K,0603,1/10W,1% RA13, RA20, RA2107-92201-00Chip Resistor2.2K,0603,1/10W,1% RA11,RA1

41、5,RA16,RA1807-91002-00Chip Resistor10K,0603,1/10W,1% RA1007-92202-00Chip Resistor22K,0603,1/10W,1% RA05,RA08,RA14,RA17,RA1907-91003-00Chip Resistor100K,0603,1/10W,1% RA01,RA02,RA03,RA04,RA0907-92203-00Chip Resistor220K,0603,1/10W,1% RA1207-91004-00Chip Resistor1M,0603,1/10W,1% LA02,LA0307-90000-01Ch

42、ip Resistor 0,0805,1/8W,5%,RC0805JR- 0722RL R2002,R200907-92202-01Chip Resistor 22K,0805,1/8W, 1%,RC0805FR-0722KL R2003,R201007-93002-01Chip Resistor 30K,0805,1/8W, 1%,RC0805FR-0730KL R2004,R201107-98201-01Chip Resistor 8.2K,0805,1/8W, 1%,RC0805FR-078K2L R2005,R201207-91202-01Chip Resistor 12K,0805,

43、1/8W, 1%,RC0805FR-0712KL R2007,R201407-90104-01Chip Resistor 100K,0805,1/8W, 5%,RC0805JR-07100KL R2013,R201507-92200-01Chip Resistor 220,0805,1/8W,1%,RC0805FR- 07220RL CAPACTIOR CA0726-47951-00Ceramic Chip Capacitor4.7pJ,50V,0603,NPO CA0926-22511-20Ceramic Chip Capacitor2.2uK,16V,0603,X7R CA01,CA02,

44、CA03,CA04,CA06,CA08,C A12 26-10451-10Ceramic Chip Capacitor100nK,50V,0603,X7R CA13, CA1426-10511-20Ceramic Chip Capacitor 1uK,16V,0603,X7R,C1608X7R1C1 05K C2001,C200426-10351-01Electrolytic Capacitor SMD10nK,50V,0805,X7R CA1826-10451-11Ceramic Chip Capacitor 100nK,50V,0805,X7R,C2012X7R1 H104KT CA05,

45、CA1126-10611-11Ceramic Chip Capacitor 10uFK,10V,X5R,0805,C2012X5R1 A106KT CA1706-10011-20 Chip Alu Electrolytic Capacitor 10uF,16V,20%,105 ,VZH100M1C0406-TR0 CA1006-10111-33 Alu Electrolytic Capacitor SMD 100uF,10V,20%,85,VE- 101M1A0605-TR0 C200006-10121-02Alu Electrolytic Capacitor CD263(X),100uF,2

46、5V,20%,105 ,F5.0 C2002, C200306-22121-03Alu Electrolytic CapacitorCD263(X),220uF,25V,20%,F5.0 TRANSISTOR QA0631-00856-03TransistorBC856BW SOT323 QA0431-00846-02TransistorBC846BW SOT323 QA01, QA02, QA03, QA0531-01815-03TransistorC1815 SOT23 Q3,Q431-02222-02TransistorPZT2222AT1G, NPN Q3,Q4or 31-05516-

47、01 NPN Medium Power Transistors BCP55-16 Q3,Q4or 31-00493-00TransistorFZT493 IC IC01,U200003-00082-01Dual OPAMPTL082BCDR RELAY RL101, RL10212-02202-17Signal RelayHFD4/5-SR HEATS INK Q3, Q4J70-287007-0Heatsink7106D/TRG INDUCTOR LA0108-02100-01Inductor10uH LGK0305-200N, Pitch=5mm CONNECTOR 26 RadioFan

48、s.CN 收音机爱 好者资料库 JA01, JA0217-01004-004RCAAV4-8.4-13, 4RCA J201013-22504-05Connector SocketXHB 2 .5A-4AW J2003, J200413-22502-00Connector SocketXHB 2.5A-2A PA01A13-22511-02HOUSINGXHB-11AW 67-114001-0PCB TerminalHS40-360.1-B009V1-M002 PCB-4:POWER KEY BOARD PART NO.DESCRIPTION PCB INFO 01-94004-00POWER

49、 KEY BOARD A16-94004-21POWER KEY PCB VM1.0 FR-4,1.6mm,2Layers,1Oz, TG130, 3750mm 3XPower key BOARD;3XDISPLAY BOARD，6xNTC board A16-94020-21 DISPLAY+Power key BOARD +NTC Board PCB ASSY VM1.0 FR-4,1.6mm,2Layers,1Oz, TG130, 153160mm SWITCH S90111-04101-05TACT SWITCHIT-1102A-1160 JA2113-22505-00ConnectorXH