Jvc-KWR-900-BTJ-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2012 JVC KENWOOD Corporation No.MA520 2012/1 CD RECEIVER MA52020121 SERVICE MANUAL KW-R900BTJ, KW-R900BTU COPYRIGHT 2012 JVC KENWOOD Corporation Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) Lead free solder used in the board (mater

2、ial : Sn-Cu, melting point : 230 Centigrade) For us RadioFans.CN 收音机爱 好者资料库 (No.MA520)2/16 SPECIFICATION For US Subject to change without notice. If a kit is necessary for your car, consult your telephone directory for the nearest car audio speciality shop. AUDIO AMPLIFIER SECTION Power Output20 W R

3、MS x 4 Channels at 4 and 1% THD+N Load Impedance4 (4 to 8 allowance) Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio80 dBA (reference: 1 W into 4) Line-Out or Subwoofer-Out Level/Impedance5 V/20 k load (full scale) Output Impedance 600 TUNER SECTION FMFrequency Range200 kHz step: 87.9 MHz

4、 to 107.9 MHz 50 kHz step: 87.5 MHz to 108.0 MHz Usable Sensitivity9.3 dBf (0.8 V/75) 50 dB Quieting Sensitivity16.3 dBf (1.8 V/75) Alternate Channel Selectivity (400 kHz)65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation40 dB AMFrequency Range10 kHz step: 530 kHz to 1 700 kHz 9 kHz step:

5、531 kHz to 1 611 kHz Sensitivity/Selectivity20 V/40 dB CD PLAYER SECTION Signal Detection SystemNon-contact optical pickup (semiconductor laser) Number of Channels2 channels (stereo) Frequency Response5 Hz to 20 000 Hz Signal-to-Noise Ratio102 dB Wow and FlutterLess than measurable limit USB SECTION

6、 USB StandardUSB 1.1, USB 2.0 Data Transfer Rate (Full Speed)Max. 12 Mbps Compatible DeviceMass storage class Compatible File SystemFAT 32/16/12 Playable Audio FormatMP3/WMA/WAV Maximum Supply CurrentDC 5 V 1 A BLUETOOTH SECTION VersionBluetooth 2.1 certified (+EDR) Power ClassClass 2 Radio Service

7、Area10 m (10.9 yd) ProfileHFP 1.5, OPP 1.1, A2DP 1.2, AVRCP 1.3, PBAP 1.0 GENERAL Power Requirement (Operating Voltage)DC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Operating Temperature0C to +40C (32F to 104F) Dimensions (W H D) (approx) Installation Size182 mm 111 mm

8、 160 mm (7-3/16” 4-3/8” 6-5/16”) Panel Size188 mm 117 mm 18 mm (7-7/16” 4-5/8” 3/4”) Mass1.8 kg (4 lbs) (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA520)3/16 SPECIFICATION For ASIA Subject to change without notice. AUDIO AMPLIFIER SECTION Maximum Power Output50 W per channel Continuous Powe

9、r Output (RMS)20 W per channel into 4, 40 Hz to 20 000 Hz at less than 1% total harmonic distortion. Load Impedance4 (4 to 8 allowance) Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio80 dB Line-Out or Subwoofer-Out Level/Impedance 5 V/20 k load (full scale) Output Impedance 600 TUNER SECT

10、ION FMFrequency Range87.5 MHz to 108.0 MHz Usable Sensitivity9.3 dBf (0.8 V/75) 50 dB Quieting Sensitivity16.3 dBf (1.8 V/75) Alternate Channel Selectivity (400 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation40 dB AMFrequency Range531 kHz to 1 611 kHz Sensitivity/Selectivity20 V/40

11、 dB CD PLAYER SECTION Signal Detection SystemNon-contact optical pickup (semiconductor laser) Number of Channels2 channels (stereo) Frequency Response5 Hz to 20 000 Hz Signal-to-Noise Ratio102 dB Wow and FlutterLess than measurable limit USB SECTION USB StandardUSB 1.1, USB 2.0 Data Transfer Rate (F

12、ull Speed)Max. 12 Mbps Compatible DeviceMass storage class Compatible File SystemFAT 32/16/12 Playable Audio FormatMP3/WMA/WAV Maximum Supply CurrentDC 5 V 1 A BLUETOOTH SECTION VersionBluetooth 2.1 certified (+EDR) Power ClassClass 2 Radio Service Area10 m ProfileHFP 1.5, OPP 1.1, A2DP 1.2, AVRCP 1

13、.3, PBAP 1.0 GENERAL Power Requirement (Operating Voltage)DC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Operating Temperature0C to +40C Dimensions (W H D) Installation Sizeapprox. 178 mm 100 mm 156 mm Panel Sizeapprox. 184 mm 112 mm 22 mm Mass1.5 kg (excluding accessor

14、ies) RadioFans.CN 收音机爱 好者资料库 (No.MA520)4/16 SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contains special hardware and many circuits and components specially for safety purpos- es. For continued protection, no changes should be made to the original design unless authori

15、zed in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be per- formed by qualified personnel only. (2) Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not b

16、e made. Any design alterations or additions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom. (3) Many electrical and mechanical parts in the products have special safety-related characteristics

17、. These characteris- tics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by us- ing replacement components rated for higher voltage, watt- age, etc. Replacement parts which have these special safety characteristics are identified in the P

18、arts List of Ser- vice Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety charac- teristics as the recommended replacement parts sho

19、wn in the Parts List of Service Manual may create shock, fire, or other hazards. (4) The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of elect

20、ric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after reassem- bling. (5) Leakage shock hazard testing After reassembling the product, always perform an isola- tion check o

21、n the exposed metal parts of the product (an- tenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this check. Plug the AC line cord direct

22、ly into the AC outlet. Using a Leakage Current Tester, measure the leakage current from each exposed metal parts of the cabinet, particular- ly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage cur- rent must not exceed 0.5mA AC (r.m.s.). Alternate

23、 check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15F AC-type capacitor between an ex- posed metal part and a known good earth ground. Measure the AC

24、voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Vol

25、tage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1.2Warning (1) This equipment has been designed and manufactured to meet international safety standards. (2) It is the legal responsibility of the repairer to ensure that these safety standards are maintain

26、ed. (3) Repairs must be made in accordance with the relevant safety standards. (4) It is essential that safety critical components are replaced by approved parts. (5) If mains voltage selector is provided, check setting for local voltage. 1.3Caution Burrs formed during molding may be left over on so

27、me parts of the chassis. Therefore, pay attention to such burrs in the case of pre- forming repair of this system. 1.4Critical parts for safety In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such a

28、s the resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby are critical for safety. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (This regulation dose not Except the J and C version) Good earth ground Place this probe on

29、each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE (No.MA520)5/16 1.5Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode

30、in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.5.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products. Be careful to use proper grounding in

31、the area where repairs are being performed. (1) Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it. (2) Ground yourself Use an anti-static wrist strap to release any sta

32、tic electricity built up in your body. (3) Handling the optical pickup In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer t

33、o the text.) Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode. 1.6Handling the traverse unit (optical pickup) (1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a se

34、nsitive, complex unit. (2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time

35、when attaching it to the connector. (3) Handle the flexible cable carefully as it may break when subjected to strong force. (4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it. 1.7Attention when traverse unit is decomposed *Please refer to Disassemb

36、ly method in the text for the pickup unit. Apply solder to the short land sections before the card wire is disconnected from the connector on the servo board. (If the card wire is disconnected without applying solder, the pickup may be destroyed by static electricity.) In the assembly, be sure to re

37、move solder from the short land sections after connecting the card wire. 1M Conductive material (conductive sheet) or iron palate (caption) Anti-static wrist strap SOLDER (No.MA520)6/16 1.8Important for laser products 1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II

38、 laser radiation when open. Do not stare into beam. (Others) Visible and/or invisible class 1M laser radiation when open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 4.

39、CAUTION : This laser product uses visible and/or invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. It is dangerous to defeat the safety switches. 5.CAUTION : If safety swit

40、ches malfunction, the laser is able to function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified here in may result in hazardous radiation exposure. REPRODUCTION AND POSITION OF LABELS and PRINT ! Please use enough caution not to see the beam directly

41、 or touch it in case of an adjustment or operation check. WARNING LABEL and PRINT (No.MA520)7/16 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. SECTION 3 DISASSEMBLY 3.1Main body (Used model: KW-R900BTJ) 3.1.1Removing the Front panel (See

42、 Fig.1) (1) Remove the 2 screws A attaching the both side of the Front panel. (2) Disengage 4 hooks a engaged both side of the Front panel. Fig.1 3.1.2Removing the Bottom chassis (See Fig.2, 3) (1) Remove the 2 screws B attaching the both side of the Bot- tom chassis. (See Fig.2) Fig.2 (2) Remove th

43、e 3 screws C attaching the Bottom chassis. (See Fig.3) (3) Remove the 3 screws D and 1 screw E attaching the Heat sink. (See Fig.3) (4) Remove the 6 screws F and 1 screw G attaching the Rear bracket. (See Fig.3) Fig.3 3.1.3Removing the Electric unit (See Fig.4, 5, 6) (1) Remove the 2 screws H and on

44、e screw J attaching the Side plate. (See Fig.4) Fig.4 A hook a B DF EFG C HHJ (No.MA520)8/16 (2) Remove the 3 screws K attaching the Electric unit. (See Fig.5) Fig.5 (3) Disconnect B-B connector CN502 of the Electric unit con- nected the CD mechanism and Electric unit. (See Fig.6) Fig.6 3.1.4Removin

45、g the CD mechanism (See Fig.7) (1) Remove the 3 screws L attaching the CD mechanism. Fig.7 3.1.5Removing the Switch unit (See Fig.8) (1) Remove the Volume knob. (2) Disconnect the connector wire connected to connector CN602 of the Switch unit. (3) Remove the 13 screws M attaching the Switch unit. Fi

46、g.8 K K CN502 L L M M M CN602 (No.MA520)9/16 3.2CD mechanism assembly section 3.2.1Removing the Mecha control board (1) Solder the short land on the pickup. (See Fig. 1) Fig.1 (2) Remove the 8 wires from the Mecha control board. (See Fig.2) Fig.2 (3) Disconnect the flexible wire from the pickup conn

47、ected to the connector CN102 on the Mecha control board. (See Fig.3) (4) Remove the 2 screws A attaching the Mecha control board. (See Fig.3) Fig.3 3.2.2Removing the Traverse mechanism (See Fig.4, 5) (1) Remove the 5 springs from the traverse mechanism. (See Fig.4) Fig.4 (2) Remove the 3 screws B at

48、taching the bottom frame as- sembly. (See Fig.5) (3) Remove the 3 dumpers from the bottom frame assembly. (See Fig.5) Fig.5 3.2.3Removing the Pickup (See Fig.6, 7) (1) Remove the 2 screws C attaching the feed bracket assem- bly. (See Fig.6) Fig.6 SOLDER BLACK RED WHITE ORANGE ORANGE WHITE YELLOW YEL

49、LOW CN102 A B B CC (No.MA520)10/16 (2) Remove the shaft from the TM base. (See Fig.7) (3) Disengage the hook a on the pickup from the TM base. (See Fig.7) Fig.7 3.2.4Removing the Spindle motor (See Fig.8. 9) (1) Remove the HC CL. Spring from the HC CL. base and the TM base, and then lift up the HC CL. base. (See Fig.8) Fig.8 (2) Remove the HC CL. base from the holes on the TM base. (See Fig.9) Fig.9 (3) Remove the 2 screws D attaching the spindle motor. (See Fig.10) Fig.10 shaft SIDE VIEW HC CL. spring D (No.MA