Jvc-KDG-615-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MA147 2005/2 CD RECEIVER MA14720052 KD-G615 TABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SER

2、VICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 4ADJUSTMENT

3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27 A

4、rea suffix UT - Taiwan UH - Thailand UN - Asean U - Other Areas RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA147) SPECIFICATION Design and specifications are subject to change without notice. AUDIO AMPLIFIER SECTION Maximum Power OutputFront50 W per channel Rear50 W per channel Continuous Power Output (RMS) Fr

5、ont19 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 allowance) Tone Control RangeBass10 dB at 100 Hz Treble10 dB at 10 kHz Frequency Re

6、sponse40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-Out Level/Impedance2.5 V/20 k load (full scale) Output Impedance1 k Subwoofer-Out Level/Impedance2.0 V/20 k load (full scale) Other TerminalsCD changer, SUBWOOFER TUNER SECTION Frequency RangeFM87.5 MHz to 108.0 MHz AM531 kHz to 1 602 kHz FM T

7、unerUsable 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 Separation35 dB Capture Ratio1.5 dB AM TunerSensitivity20 V Selectivity35 dB CD PLAYER SECTION TypeCompact disc player S

8、ignal 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 limit MP3 Decoding FormatMPEG1/2 Audio Layer 3 Max. Bit Rate : 320 kbps W

9、MA (Windows Media Audio) Decoding FormatMax. Bit Rate : 192 kbps GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Operating Temperature0C to +40C Dimensions (W H D)Installation Size (approx.)182 mm 52 mm 150 mm Panel Size (approx.

10、)188 mm 58 mm 11 mm Mass (approx.)1.5 kg (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA147)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 in the case of preforming repair of t

11、his 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.MA147) 1.2Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. i

12、s 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 diode) in devices such as CD players.

13、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 pickup) on it. (2) Ground yourself Use an anti

14、-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. After replacement, return the shorted parts

15、 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) Do not subject the traverse unit (optical p

16、ickup) 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-static pin when replacing the traverse unit. B

17、e 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 turn it. 1.4Attention when traverse unit is

18、decomposed *Please refer to Disassembly method in the text for the CD pickup unit. Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit. (If the flexible wire is disconnected without applying solder, the CD pickup may be destroyed by static

19、 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.MA147)1-5 1.5Important for laser product

20、s 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 Unit if it malfunctions. 4.CAUTIO

21、N : 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.CAUTION : If safety switches malfunctio

22、n, 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 directly or touch it in case of a

23、n 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 strlen. (s) VARO : Avattaessa ja

24、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) CLASS 1 LASER PRODUCT 1-6 (No.MA14

25、7) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS 2.1HOW TO IDENTIFY MODELS 2.1.1NAME PLATE Discernment sign (No.MA147)1-7 SECTION 3 DISASSEMBLY 3.1Main body 3.1.1Removing the front panel assembly (See Fig.1) (1) Push the detach button in the lower right part of the front panel assembly and remove the fron

26、t panel assembly. (2) Take out 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, two joints b on the right side and joint c on the back side of the ma

27、in body, then remove the bottom cover from the main body. CAUTION: When releasing the joints using a screwdriver, do not damage the main board. Fig.2 Front panel assembly Detach button Bottom cover Joint a Joint b Joint a Joint b Joint c 1-8 (No.MA147) 3.1.3Removing the front chassis assembly (See F

28、igs.3 and 4) Prior to performing the following procedures, remove the front panel assembly and bottom cover. (1) Remove the two screws A on the both sides of the main body. (See Fig.3) (2) Remove the two screws B on the front side of the main body. (See Fig.4) (3) Release the two joints d and two jo

29、ints e on the both sides of the main body, then remove the front chassis assembly forward. (See Fig.3) Fig.3 Fig.4 3.1.4Removing the side panel (See Fig.5) Reference: Remove the front panel assembly as required. (Refer to 3.1.1 Removing front panel assembly) (1) Remove the two screws C and screw D a

30、ttaching the side panel on the left side of the main body. (2) Take out the side panel from the main body. Fig.5 Joint d Joint d Front chassis assembly A Joint e Joint e A B Front chassis assembly Side panel CCD (No.MA147)1-9 3.1.5Removing the rear bracket (See Fig.6) Prior to performing the followi

31、ng procedure, remove the bottom cover. (1) Remove the three screws E, three screws F and three screws G attaching the rear bracket on the back side of the main body. (2) Take out the rear bracket. Reference: When attaching the rear bracket to the main body, insert the subwoofer output into the slot

32、of the rear bracket. Fig.6 3.1.6Removing the main board (See Fig.7) Prior to performing the following procedure, remove the front panel assembly, front chassis assembly, side panel, bottom cover and rear bracket. (1) Remove the two screws H attaching the main board. (2) Disconnect the connector CN50

33、1 and take out the main board. Fig.7 3.1.7Removing the CD mecha control board (See Fig.8) Prior to performing the following procedure, remove the front panel assembly, front chassis assembly, side panel, bottom cover, rear bracket and main board. (1) Disconnect the card wire from the connector CN601

34、 on the CD mecha control board. (2) Remove the five screws J attaching the CD mecha control board. (3) Release the claw f, and take out the CD mecha control board. Reference: When attaching the CD mecha control board, attach it to the claw f and pass the slot g of it into the boss of the CD mecha- n

35、ism assembly. Fig.8 F EE Rear bracket GFG Insert the steering remote into the slot. Main board H H CN501 CD mecha control boardCN601 J J J Slot g Claw f 1-10 (No.MA147) 3.1.8Removing the CD mechanism assembly (See Fig.9) Prior to performing the following procedure, remove the front panel assembly, f

36、ront chassis assembly, side panel, bottom cover, rear bracket, main board and CD mecha control board. (1) Remove the three screws K attaching the top chassis. (2) Take out the CD mechanism assembly. Fig.9 3.1.9Removing the switch board (See Figs.10 to 12) Prior to performing the following procedure,

37、 remove the front panel assembly. (1) Remove the five screws L attaching the front panel assem- bly. (See Fig.10) (2) Release the nine joints h, and take out the rear cover. (See Fig.11) (3) Release the joint i, and take out the switch board. (See Fig.12) Note: When removing the rear cover assembly

38、and switch board, be careful not to lose the compression spring and comp. spring. (See Fig.12) Fig.10 Fig.11 Fig.12 K K CD mechanism assembly Top chassis L Rear cover Rear cover Joint h Joint h Joint hJoint h Switch board Compression spring Comp. spring Front panel assembly (No.MA147)1-11 3.2CD Mech

39、anism section 3.2.1Removing the top cover (See Figs.1 and 2) (1) Remove the four screws A on the both side of the body. (2) Lift the front side of the top cover and move the top cover backward to release the two joints a. Fig.1 Fig.2 A A A Joints aTop cover Joints a Top cover 1-12 (No.MA147) 3.2.2Re

40、moving the connector board (See Figs.3 to 5) CAUTION: Before disconnecting the flexible wire from the pickup, solder the short-circuit point on the pickup. No observance of this in- struction may cause damage of the pickup. (1) Remove the screw B fixing the connector board. (2) Solder the short-circ

41、uit point on the pickup. (3) Disconnect the flexible wire from the pickup. (4) Move the connector board in the direction of the arrow to release the two joints b. (5) Unsolder the wires on the connector board if necessary. CAUTION: Unsolder the short-circuit point after reassembling. Fig.3 Fig.4 Fig

42、.5 B Connector board PickupShort-circuit point Joints b Wires Pickup Short-circuit point (Soldering) Flexible wire B Flexible wire Connector board Frame (No.MA147)1-13 3.2.3Removing the DET switch (See Figs.6 and 7) (1) Extend the two tabs c of the feed sw. holder and pull out the switch. (2) Unsold

43、er the DET switch wire if necessary. Fig.6 Fig.7 Connector board DET switch Pickup DET switch Tab c Tab c DET switch wire Feed sw. holder 1-14 (No.MA147) 3.2.4Removing the chassis unit (See Figs.8 and 9) Prior to performing the following procedure, remove the top cover and connector board. (1) Remov

44、e the two suspension springs (L) and (R) attaching the chassis unit to the frame. CAUTION: The shape of the suspension spring (L) and (R) are dif- ferent. Handle them with care. When reassembling, make sure that the three shafts on the underside of the chassis unit are inserted to the dampers certai

45、nly. Fig.8 Fig.9 Suspension spring (L) Suspension spring (L) Suspension spring (R) Suspension spring (R) Chassis unit Frame Chassis unit Frame Shafts Shaft Damper Damper Damper (No.MA147)1-15 3.2.5Removing the clamper assembly (See Figs.10 and 11) Prior to performing the following procedure, remove

46、the top cover. (1) Remove the clamper arm spring. (2) Move the clamper assembly in the direction of the arrow to release the two joints d. Fig.10 Fig.11 Clamper arm spring Chassis rivet assembly Joint d Joint d Clamper assembly Clamper arm spring Clamper assembly Joint d Joint d Chassis rivet assemb

47、ly 1-16 (No.MA147) 3.2.6Removing the loading / feed motor assembly (See Figs.12 and 13) Prior to performing the following procedure, remove the top cover, connector board and chassis unit. (1) Remove the screw C and move the loading / feed motor as- sembly in the direction of the arrow to remove it

48、from the chassis rivet assembly. (2) Disconnect the wire from the loading / feed motor assembly if necessary. CAUTION: When reassembling, connect the wire from the loading / feed motor assembly to the flame as shown in Fig.12. Fig.12 Fig.13 Loading / feed motor assembly Loading / feed motor assembly

49、 C (No.MA147)1-17 3.2.7Removing the pickup unit (See Figs.14 to 18) Prior to performing the following procedure, remove the top cover, connector board and chassis unit. (1) Remove the screw D and pull out the pu. shaft holder from the pu. shaft. (2) Remove the screw E attaching the feed sw. holder. (3) Move the part e of the pickup unit upward with the pu. shaft and the feed sw. holder, then release the joint f of the