Jvc-KDSV-3205-UH-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2006 Victor Company of Japan, Limited No.MA256 2006/3 VCD/CD RECEIVER MA25620063 KD-SV3204UI,KD-SV3205U, KD-SV3205UN,KD-SV3205UT, KD-SV3205UH Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTIONS . . . . . . .

2、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . .

3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 5TROUBL

4、ESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA256) SPECIFICATION Design and specifications are subject to change without notice. AUDIO AMPLIFIER SECTION Maximum Power

5、OutputFront50 W per channel Rear50 W per channel Continuous Power Output (RMS) Front19 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Rear19 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Load Impedance4 (4 to 8 al

6、lowance) Tone Control RangeBass10 dB at 100 Hz Treble10 dB at 10 kHz Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-Out Level/Impedance2.5 V/20 k load (full scale) Output Impedance1 k Other TerminalLINE IN, CD changer VIDEO SECTION Color systemPAL/NTSC Video output (composite)1

7、 Vp-p/75 TUNER SECTION Frequency RangeFM87.5 MHz to 108.0 MHz AM531 kHz to 1 602 kHz FM TunerUsable Sensitivity11.3 dBf (1.0 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 Separation30 dB AM TunerSensiti

8、vity20 V Selectivity35 dB VCD/CD PLAYER SECTION TypeCompact disc player Signal Detection SystemNon-contact optical pickup (semiconductor laser) Number of Channels2 channels (stereo) Frequency Response5 Hz to 20 000 Hz Dynamic Range96 dB Signal-to-Noise Ratio98 dB Wow and FlutterLess than measurable

9、limit MP3 Decoding FormatMPEG1/2 Audio Layer 3 Max. Bit Rate: 320 kbps WMA (Windows Media Audio) Decoding FormatMax. Bit Rate: 192 kbps GENERAL Power RequirementOperating Voltage: Grounding SystemNegative ground Allowable Operating Temperature0C to +40C Dimensions (W H D)Installation Size (approx.)1

10、82 mm 52 mm 150 mm Panel Size (approx.)188 mm 58 mm 11 mm Mass (approx.)1.4 kg (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA256)1-3 SECTION 1 PRECAUTIONS 1.1Safety Precautions ! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs

11、 in the case of preforming repair of this system. ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. RadioFans.CN 收音机爱 好者资料库 1-4 (No.MA256) 1.2Preventing static electricity Electrostatic discharge (ESD), which occurs when static electric

12、ity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.2.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser

13、diode) in devices such as laser products. Be careful to use proper grounding in 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 pick

14、up) on it. (2) Ground yourself Use an anti-static wrist strap to release any static 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. A

15、fter replacement, return the shorted parts to their original condition. (Refer to 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. 1.3Handling the traverse unit (optical pickup) (1) D

16、o not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, 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-stat

17、ic pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector. (3) Handle the flexible cable carefully as it may break when subjected to strong force. (4) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not tu

18、rn it. 1.4Attention when traverse unit is decomposed *Please refer to Disassembly method in the text for the pickup unit. Apply solder to the short land before the flexible wire is disconnected from the connector on the pickup unit. (If the flexible wire is disconnected without applying solder, the

19、pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land after connecting the flexible wire. 1M (caption) Anti-static wrist strap Conductive material (conductive sheet) or iron plate Pickup Short-circuit point (Soldering) Flexible wire (No.MA256)1

20、-5 1.5Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser

21、Unit if it malfunctions. 4.CAUTION : The CD,MD and DVD player uses 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.CAUTIO

22、N : If safety switches 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 ! Please use enough caution not to see the beam

23、directly or touch it in case of an adjustment or operation check. WARNING LABEL CAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) VARNING : Synlig och osynling laserstrlning nr den ppnas och sprren r urkopplad. Betrakta ej

24、strlen. (s) VARO : Avattaessa ja suojalukitus ohitettuna tai viallisena olet alttiina nkyvlle ja nkymttmlle lasersteilylle. Vlt steen kohdistumista suoraan itseesi. (f) ADVARSEL : Synlig og usynlig laserstrling nr maskinen er ben eller interlocken fejeler. Undg direkte eksponering til strling. (d) C

25、LASS 1 LASER PRODUCT 1-6 (No.MA256) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MA256)1-7 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the front panel assembly (See Fig.1) Push the detach button in the lower right part

26、of the front panel assembly and remove the front panel assembly. Fig.1 3.1.2Removing the bottom cover (See Fig.2) (1) Turn the main body up side down. (2) Insert a screwdriver under the joints to release the two joints a on the left side, tow joints b on the right side and joint c on the back side o

27、f the main body, then remove the bottom cover from the main body. Note: When releasing the joints using a screwdriver, do not damage the main board. Fig.2 3.1.3Removing the front chassis assembly (See Fig.3) Remove the front panel assembly and bottom cover. (1) Remove the two screws A on the both si

28、des of the main body. (2) Release the one joint d and one joint e on the both sides of the main body, then remove the front chassis assembly to- ward the front. Fig.3 Front panel assembly Detach button Bottom cover b b c a a d Front chassis assembly A e 1-8 (No.MA256) 3.1.4Removing the side panel (S

29、ee Fig.4) Reference: Remove the front panel assembly as required. (1) Remove the one screw B and two screws C attaching the side panel on the left side of the main body. (2) Remove the side panel from the main body. Fig.4 3.1.5Removing the rear bracket (See Fig.5) Remove the bottom cover. (1) Remove

30、 the three screws D, one screw D, four screws E and two screws F attaching the rear bracket on the back side of the main body. Reference: When attaching the screw D, attach the wire holder of the VIDEO OUT cable with it as before. (2) Remove the LINE IN cable in the direction of the arrow from the s

31、lot of the rear bracket. (3) Remove the rear bracket. 3.1.6Removing the main board (See Fig.5 and 6) Remove the front panel assembly, bottom cover, front chassis assembly and side panel. (1) Remove the three screws D and one screw D attaching the rear bracket on the back side of the main body. (See

32、Fig.5) Reference: When attaching the screw D, attach the wire holder of the DVD OUT cable with it as before. (2) Remove the two screws G attaching the main board. (See Fig.6) (3) Disconnect the connector CN301 on the main board from the main body and take out the main board with the rear bracket. (S

33、ee Fig.6) Reference: Remove the rear bracket from the main body as required. Fig.5 Fig.6 Side panel CBC EF DD E Rear bracket D Slot Wire holder VIDEO OUT cable LINE IN cable F Main board GG CN301 Rear bracket (No.MA256)1-9 3.1.7Removing the mechanism control board (See Fig.7) Remove the front panel

34、assembly, bottom cover, front chassis assembly, side panel and main board. (1) Disconnect the card wire from the connector CN601 on the mechanism control board. (2) Remove the five screws H attaching the mechanism con- trol board on the CD mechanism assembly. (3) Remove the joint f in the direction

35、of the arrow and take out the mechanism control board from the CD mechanism as- sembly. Fig.7 3.1.8Removing the CD mechanism assembly (See Fig.8) Remove the front panel assembly, bottom cover, front chassis assembly, side panel and main board. Reference: Remove the mechanism control board as require

36、d. (1) Remove the three screws J attaching the CD mechanism assembly on the top chassis. (2) Take out the CD mechanism assembly. Fig.8 H H Mechanism control board CN601 Card wire f H CD mechanism assembly H J J Mechanism control board Top chassis J CD mechanism assembly 1-10 (No.MA256) 3.1.9Removing

37、 the switch board (See Fig.9 to 11) Remove the front panel assembly. (1) Remove the four screws K on the back side of the front panel assembly. (See Fig.9) (2) Release the fourteen joints g and remove the rear cover. (See Fig.10) (3) Release the joint h and take out the switch board from the front p

38、anel assembly. (See Fig.11) Fig.9 Fig.10 Fig.11 3.2CD mechanism section For the CD mechanism section, please refer CD mechanism manual TN2001-1077 (No.MY001). K KK g g g g gg Rear cover Switch board h Front panel assembly (No.MA256)1-11 SECTION 4 ADJUSTMENT 4.1Adjustment method ? ? Test instruments

39、required for adjustment (1) Digital oscilloscope (100MHz) (2) Electric voltmeter (3) Digital tester (4) Tracking offset meter (5) Test Disc JVC :CTS-1000 (6) Extension cable for check EXTSH002-22P 1 ? ? Standard volume position Balance and Bass &Treble volume : lndication0 Loudness : OFF ? ? Standar

40、d measuring conditions ? ? Dummy load Exclusive dummy load should be used for AM,and FM. For FM dummy load,there is a loss of 6dB between SSG output and antenna input.The loss of 6dB need not be considered since direct reading of figures are applied in this working standard. ? ? How to connect the e

41、xtension cable for adjusting Caution: Be sure to attach the heat sink and rear bracket onto the power amplifier IC and regulator IC respectively, before supply the power. If voltage is applied without attaching these parts, the power amplifier IC and regulator IC will be destroyed by heat. Power sup

42、ply voltageDC14.4V(11 to 16V) Load impedance20K(2 Speakers connection) Output LevelLine out 2.0V (Vol. MAX) EXTSH002-22P 1-12 (No.MA256) 4.2Confirmation method of a microcomputer version 1. Press the / I /ATT button. 2. Set this set at tuner mode. 3. Keep this state more than 2 seconds while continu

43、ing pressing the BAND button and 2 button sequentially. 4. It is displayed as follows by a display window. MAMain micon version CDCD micon version CHCH micon version (It is displayed only in changer connection.) Change each indication with the SKIP button. (No.MA256)1-13 SECTION 5 TROUBLESHOOTING 5.

44、1Maintenance of laser pickup (1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab. (2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear. The level of RF output (EFM output:

45、 amplitude of eye pattern) will be low. (3) Semi-fixed resistor on the APC PC board The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power.Since this adjustment should be performed to match the characteristics of the whole optical b

46、lock, do not touch the semi-fixed resistor. If the laser power is lower than the specified value, the la- ser diode is almost worn out, and the laser pickup should be replaced. If the semi-fixed resistor is adjusted while the pickup is functioning normally, the laser pickup may be damaged due to exc

47、essive current. 5.2Replacement of laser pickup Is RF output 1.3 0.4Vp-p? YES NO O.K Replace it. 5.2 Replacement of laser pickup Turn off the power switch and,disconnect the power cord from the ac outlet. Replace the pickup with a normal one.(Refer to Pickup Removal on the previous page) Play a disc.

48、 Finish. Check the eye-pattern at RF test point. Plug the power cord in,and turn the power on. At this time,check that the laser emits for about 3seconds and the objective lens moves up and down. Note: Do not observe the laser beam directly. 1-14 (No.MA256) 5.316 PIN CORD DIAGRAM 8 7 6 5 4 3 2 1 16

49、15 14 13 12 11 10 9 BK RD BL BL/WH WH GN VI GY YL NC YG BR WH/BK GN/BK VI/BK GY/BK 14 YG 16 YL 8 BK 7 RD 5 BL/WH 3 GN 11 GN/BK 2 VI 10 VI/BK 4 WH 12 WH/BK 1 GY 9 GY/BK 6 BL PARKING BRAKE GND REMOTE OUT POWER ANTENNA TEL MUTING BK RD BL WH BR Black Red Blue White Brown GNGreen VIViolet GYGray YLYellow YGYellow Green RRRear Right FRFront Right FLFront Left RLRear Left REMOTERemote ANT ACC TEL Auto Antenna ACC Line Telephone Muting GNDGround MEMORYMemory Backup Battery+ PARKINGParking Brake