NAD-C725BEE-rec-sm维修电路原理图.pdf

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1、NAD SERVICE MANUAL C 725BEE STEREO RECEIVER C 725BEE STEREO RECEIVER ? 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. . 9-18 ALIGNMENT PROCEDURE. . . . . . . . . . . . . . . . . .

2、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 SCHEMATICS. . . . 20-23 PCB LAYOUT. 24-28 TROUBLE SHOOTING GUIDE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ELECTRICAL PARTS LIST. 30-46 EXPLODED VIEW. . 47 EXPLODED VIEW PARTS LIST. .

3、. . 48 C725BEE PACKING ACCESSORY AND PARTS LIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 ? 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.

4、 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 OTHERWISE,

5、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 10 WATT RES

6、ISTOR, 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 VOLTAGE MEAS

7、UREMENTS 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 INSTALLATION 1. NEVER

8、 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 A FACTOR,

9、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 MOUNTING INSTRU

10、CTIONS 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. CAUTION C

11、USTOMERS 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 THRESHOLDS

12、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 CUSTOMERS AGAIN

13、ST 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 “DANGEROUS

14、 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 LITERATURE ACC

15、OMPANYING THE APPLIANCE. ? 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 servicin

16、g precautions 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,

17、module, or any 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

18、 may result in 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 sw

19、ab, or comparable 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 a

20、nd/or any of its 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 Checkin

21、g Procedure Disconnect 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-

22、ohm. Note 1 : 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)

23、Devices. Examples 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

24、 component or 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

25、unit under test. 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. Us

26、e only an antistatic 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 rep

27、lacement ES device 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

28、 material from 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 ha

29、nding unpackaged 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.) ? RadioFans.CN 收音机爱 好者资料库 ? ? ? 1. Power 2. Power/Standby /Pro

30、tection/Led 3. Blend 4. Info 5. Memory 6. Tuner Mode 1. +12V trigger out 2. IR in / out 3. MP input 4. CD input 5. DISC input 6. AUX input 7. TAPE input 8. REC out 9. PRE out 10.Main in 11.Sub out 12.Speaker out 13.Soft Clipping 14.ON / OFF power(AC) switch 15.Switched AC outlet 16.RS232 input 17. M

31、P Dock data port 18.Antenna (FM) 19.Antenna(AM) 20.DAB input (230V version only) 7. Preset 8. Tune 9. VFD 10.IR Receiver 11.Record out / Zone 2 selector 12.Volume 13.Headphone 14.Speaker A SCN 2.5A-2D plug;L=400mm LINKS J40121-06750-00L=7.5mm AC OUTLET BOARD01-72509-20 CONNECTORS CZ5813-23903-02VH 3

32、.96A-3AW Misc and Mechanical Parts CONNECTORS Rock SwitchA11-01101-03RF-1003-BB2 CZ38CB3814-72503-03 UL2468,#26AWG,XHB 2.5A-3Y connector, white L=300mm CB56POWER, SWITCHA14-72502-02 UL1672#18AWG, VH-3Y connector,red L=100mm CB49CB5414-72504-00 UL1015#14AWG black;UL1015#16AWG red ?white, VH 3.96A-4Y

33、connector,L=130mm CZ36TUNER14-72017-10FPC?180mm?17PIN CZ35CZ70214-72520-0020pin,1.25mm,L=600mm TRANSFORMERS T51A18-72516-00EE16 TUNERS TUNER ANTENNA(AM)J30-37300-10LS0146BL-X000101-0 TUNER ANTENNA (FM)30-37300-00HAN-001 TV Matcher30-87200-00IF-11/ZB-6 METAL PARTS Chassis66-123001-1SECC-N5 T=1mm Subf

34、ascia66-123002-5SECC-N5 T=1mm Service Cover66-047003-0 T=1mm Copper Spacer69-047003-013.6mm PCB Support66-019004-0HS40-C352-B009V1-M014 Transformer Bracket66-001010-0HS40-C320-B009V1-M013 Phone Bracket66-123003-0SECC-N5 T=1mm Connectible Bracket66-011011-0HS40-T172_B009V1-M026 ? RadioFans.CN 收音机爱 好者

35、资料库 Tuner Bracket66-047004-0SECC-N5 T=1.0mm Metal Disc66-001008-0HS40-C320_B009V1-M020 Shielding Box67-091003-0Transformer Shorting Plug30-63200-00HS40-C320_B009V1-M014 FASTENERS Self Taping Screws61-023205-0BTB3X5 Self Taping Screws61-023206-0BTB3X6 Self Taping Screws61-023208-0BTB3X8 Self Taping S

36、crews61-024108-0STB4X8, Self Taping Screws61-023106-0STB3X6 Self Taping Screws61-023104-0STB3X4 Self Taping Screws61-023108-0STB3X8 Machine Screws61-023506-0MB3X6 Machine Screws61-023508-0MB3X8 Bolt64-108055-0GB5781 M8X55 Spring Washer63-020820-1GB93(8) Plain Washer63-010816-0GB97(8) Nut62-010802-0G

37、B6170(M8) PLASTIC PARTS VFD Lens76-123001-0(OP P/N: 25-008-0405-92) Foot ASSY87-010004-0Foot ASSY Foot75-010004-1HS40-T973-B009V1-P006 Foot PadJ78-001002-0HS40-C320-B009V1-P010 Accessory Relief BushingA84-001002-0SB4F-4 Cable Tie84-001003-0YJ-100 Cable Tie84-047001-0YJ-123 Wire Holder84-041001-0WCLA

38、-1 Power, Switch78-000220-022 Phone, Jack(1)86-014001-015x5x0.3mm Expanded Rubber86-018002-1110 x25x0.5mm Nonwavens B86-018001-024x14x0.5mm 3mm Rubber Pad86-009003-010 x10 x3mm 4mm Rubber Pad86-010003-010 x15x4mm GASKET79-123001-0CR,10*10*60 Window Lens Film76-123002-0PE T=0.1 PACKING LIST Carton Bo

39、x88-123001-0A555474244 Polyfoam End Cap(1)89-005001-6 Polyfoam End Cap(2)89-005002-5 Polybag90-005001-0690X550mm Polybag90-001013-0105280mm Polybag90-028004-0220X250mm Manu Polybag90-001002-0220X370mm Non-woven Cloth90-005002-3H=133 W=100 L=435 LABEL94-001004-2 Serial No. Label94-123001-060*10 ? Rad

40、ioFans.CN 收音机爱 好者资料库 Fuse Causion Label94-003004-03484 EPE Film90-123001-0420X206mm ACCESSORIES Instruction Manual30-47250-00 Instruction Manual30-47251-00 Remote ControlJ30-17250-00SR-8 Batteries30-22100-105# 2006/66/EC Remote ControlJ30-17251-00KRC-L1860RC(ZR5) Batteries30-28601-10CR2025 2006/66/E

41、C FOR AH VERSION ONLY(BLACK) MAIN TRANSFORMERA18-72515-10TD-120-0150K MAIN TRANSFORMERor A18-72515-30ETO08230 MAIN TRANSFORMERor A18-72515-50HA100B-0542 CB58AC, OUTPUTA14-72002-00 VH 3.96A-3Yconnector?KST FDFD2- 187(8),18AWG UL1672# red L=100mm TUNERJ37-01140-23KST-MB114MA0-23 AC CORD(AMERICAN)JA15-

42、10121-16LP-5W & SPT-2 18AWG & VH3.96-3PIN AC CORD(AMERICAN)or A15-10121-172UTJ2 & NISPT-2 18AWG/2C & VH3.96-3PIN AC OutletA17-07002-10JY0647A Rear Panel(AH)67-123003-0SECC-N5 T=1mm Rear Panel(AH)80-123003-0SECC-N5 T=1mm Rear Panel(AH)65-123003-0SECC-N5 T=1mm Top Cover67-123001-1SECC-N5 T=1mm,PPG:PCS

43、C90103S#5 FasciaJ70-123001-16063 T5 End cap LJ70-123002-06063 T5 End cap RJ70-123003-06063 T5 ?61-023106-0STB3X6 ?61-084108-0STPW4X8 Volume Knob73-014002-2 Tone Knob73-014001-2 Volume Knob Bezel77-091003-2 Selector Knob75-047001-2 Plastic Subfascia77-123001-1ABS 765B MP Button Bezel77-123002-0PC, UL

44、94V-0 Selector Knob Bezel77-123003-0PC, UL94V-0 Duo Buttons74-123001-1ABS 765B, Power Button74-123003-1ABS 765B POWER BUTTON BEZEL77-123004-1Clear PC, UL 94V-0 Barcode Label94-123003-0AH Guarantee Card94-009005-1AH FOR C VERSION ONLY(BLACK) MAIN TRANSFORMERA18-72515-20TD-230-0150B MAIN TRANSFORMERor

45、 A18-72515-40ETO08060 MAIN TRANSFORMERor A18-72515-60HA100B-0538 CB58CZ58A14-72002-01 VH 3.96A-3Y connector?18AWG UL1672# redL=100mm TUNERJ37-01141-23KST-MB114MA1-23 ? RadioFans.CN 收音机爱 好者资料库 AC CORD(EURO)JA15-02251-24 LP-21 & H03VVH2-F 20.75mm2 & VH3.96- 3PIN AC CORD(EURO)or A15-02251-25 2VTJ1 & H0

46、3VVH2-F 20.75mm2 & VH3.96- 3PIN AC OutletJA17-07002-20A302-D006-0P AC Outlet(2)61-023208-0BTB3X8 AC Outlet(1)78-000500-050 Rear Panel(C)67-123002-0ASECC-N5 T=1mm Rear Panel(C)80-123002-0SECC-N5 T=1mm Rear Panel(C)65-123002-0SECC-N5 T=1mm Top Cover67-123001-1SECC-N5 T=1mm,PPG:PCSC90103S#5 FasciaJ70-1

47、23001-16063 T5 End cap LJ70-123002-06063 T5 End cap RJ70-123003-06063 T5 ?61-023106-0STB3X6 ?61-084108-0STPW4X8 Volume Knob73-014002-2C320BEE Tone Knob73-014001-2C320BEE Volume Knob Bezel77-091003-2HS40-C355-B009V1-P003 C Selector Knob75-047001-2HS40-C720BEE_B009V1-P001 D Plastic Subfascia77-123001-

48、1HS40-C725BEE-B12V1-P003 B MP Button Bezel77-123002-0HS40-C725BEE-B12V1-P004 Selector Knob Bezel77-123003-0HS40-C725BEE-B12V1-P005 Duo Buttons74-123001-1ABS 765B Power Button74-123003-1ABS 765B POWER BUTTON BEZEL77-123004-1Clear PC, UL 94V-0 Barcode Label94-123002-0C VERSION FOR C VERSION ONLY(TI) M

49、AIN TRANSFORMERA18-72515-20TD-230-0150B MAIN TRANSFORMERor A18-72515-40ETO08060 MAIN TRANSFORMERor A18-72515-60HA100B-0538 CB58CZ58A14-72002-01 VH 3.96A-3Y connector?18AWG UL1672# red L=100mm TUNERJ37-01141-23KST-MB114MA1-23 AC CORD(EURO)JA15-02251-24 LP-21 & H03VVH2-F 20.75mm2 & VH3.96- 3PIN AC CORD(EURO)or A15-02251-25 2VTJ1 & H03VVH2-F 20.75mm2 & VH3.96- 3PIN AC OutletJA17-07002-20A302-D006-0P AC Outlet(2)61-023208-0BTB