Jvc-KDS-12-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.MA216 2005/8 CD RECEIVER MA21620058 KD-S12 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 Area suffix J - Northern America RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA216) SPECIFICATION Design and specifications are subject to change without notice. AUDIO AMPLIFIER SECTION Power Output18 W RMS 4 Channels at 4 an

5、d or = 1% THD+N Signal to Noise Ratio80 dBA (reference: 1 W into 4 ) Load Impedance4 (4 to 8 allowance) Tone Control RangeBass10 dB at 100 Hz Treble10 dB at 10 kHz Frequency Response40 Hz to 20 000 Hz Line-Out Level/Impedance2.0 V/20 k load (full scale) Output Impedance1 k TUNER SECTION Frequency Ra

6、ngeFM87.5 MHz to 107.9 MHz (with channel interval set to 200 kHz) 87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz) AM530 kHz to 1 710 kHz (with channel interval set to 10 kHz) 531 kHz to 1 602 kHz (with channel interval set to 9 kHz) FM TunerUsable Sensitivity11.3 dBf (1.0 V/75 ) 50 dB Qu

7、ieting 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 Signal Detection SystemNon-contact optical pickup (se

8、miconductor 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 GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable

9、Operating Temperature0C to +40C (32F to 104F) Dimensions (W H D) Installation Size (approx.)182 mm 52 mm 150 mm (7-3/16 2-1/16 5-15/16) Panel Size (approx.)188 mm 58 mm 11 mm (7-7/16 2-5/16 7/16) Mass (approx.)1.4 kg (3.1 lbs) (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA216)1-3 SECTION 1 P

10、RECAUTIONS 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 this system. ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or opera

11、tion check. RadioFans.CN 收音机爱 好者资料库 1-4 (No.MA216) 1.2Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity 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 pe

12、rforming 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. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbench Ground

13、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 static electricity built up in your body. (3) Handling the optical pickup In or

14、der 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 to the text.) Do not use a tester to check the condition of the laser diode i

15、n 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 pickup) to strong shocks, as it is a sensitive, complex unit. (2) Cut off the shorted part of the flexible cable us

16、ing 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 when attaching it to the connector. (3) Handle the flexible cable carefully

17、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 decomposed *Please refer to Disassembly method in the text for the CD pickup unit. Apply solder to the short land

18、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 electricity.) In the assembly, be sure to remove solder from the short land after connecting the flexible wire. 1

19、M (caption) Anti-static wrist strap Conductive material (conductive sheet) or iron plate Pickup Short-circuit point (Soldering) Flexible wire (No.MA216)1-5 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.MA216) SECTION 3 DISASSEMBL

20、Y 3.1Main body section 3.1.1Removing the front panel assembly (See Fig.1) Push the detach button in the lower right part of the front panel assembly and remove the front panel assembly. Fig.1 3.1.2Removing the bottom cover (See Fig.2) Remove the front panel assembly as required. From the bottom side

21、 of the main body, remove the joints (a, b, c) attaching the bottom cover. 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 th

22、e both sides of the main body. (2) Release the two joints d and two joints e on the both sides of the main body, then remove the front chassis assembly toward the front. Fig.3 Front panel assembly Detach button Bottom cover b b c a a Front chassis assembly A de de (No.MA216)1-7 3.1.4Removing the sid

23、e panel (See Fig.4) Remove the front panel assembly as required. (1) Remove the 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 the

24、three screws D, three screws E and two screws F attaching the rear bracket on the back side of the main body. (2) Remove the rear bracket. 3.1.6Removing the main board (See Figs.5 and 6) Remove the front panel assembly, bottom cover and side pan- el. Remove the front chassis assembly as required. (1

25、) Remove the three screws D attaching the rear bracket on the back side of the main body. (See Fig.5.) (2) Remove the two screws G attaching the main board on the bottom side of the main body. (See Fig.6.) (3) Disconnect the connector CN501 on the main board from the CD mechanism assembly and take o

26、ut the main board with the rear bracket. (See Fig.6.) Reference: Remove the rear bracket from the main body as required. (See 3.1.5 Removing the rear bracket.) Fig.5 Fig.6 Side panel CBC EF DD E Rear bracket F Main board G G CN501 Rear bracket 1-8 (No.MA216) 3.1.7Removing the CD mechanism assembly (

27、See Fig. 7) Remove the front panel assembly, bottom cover, side panel, rear bracket and main board. (1) Remove the three screws H attaching the CD mechanism assembly on the top chassis. (2) Take out the CD mechanism assembly. Fig.7 3.1.8Removing the switch board (See Figs.8 to 10) Remove the front p

28、anel assembly. (1) Remove the five screws J attaching the rear cover on the back side of the front panel assembly. (See Fig.8.) (2) Release the twelve joints f and remove the rear cover. (See Fig.9.) (3) Release the joint g and remove the switch board from the front panel assembly. (See Fig.10.) Fig

29、.8 Fig.9 Fig.10 H H CD mechanism assembly Top chassis J JJ Rear cover f Rear cover fff Switch board g Front panel assembly (No.MA216)1-9 3.2CD Mechanism Assembly 3.2.1Removing the top cover (See Figs.1 and 2) (1) Remove the two screws A on the both side of the body. (2) Lift the front side of the to

30、p 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 1-10 (No.MA216) 3.2.2Removing the connector board (See Figs.3 to 5) CAUTION: Before disconnecting the flexible wire from the pickup, solder the short-circuit point on the picku

31、p. 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-circuit point on the connector board. (3) Disconnect the flexible wire from the pickup. (4) Move the connector board in the direction of the arrow to release

32、 the two joints b. (5) Unsolder the wire on the connector board if necessary. CAUTION: Unsolder the short-circuit point after reassembling. Fig.3 Fig.4 Fig.5 B Connector board PickupShort-circuit point Joints b Wires Pickup Short-circuit point (Soldering) Flexible wire B Flexible wire Connector boar

33、d Frame (No.MA216)1-11 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) Unsolder 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 1-12 (N

34、o.MA216) 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) Remove 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

35、- 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 certainly. Fig.8 Fig.9 Suspension spring (L) Suspension spring (L) Suspension spring (R) Suspension spring (R) Chassis unit Frame Chassis unit Frame Sh

36、afts Shaft Damper Damper Damper (No.MA216)1-13 3.2.5Removing the clamper assembly (See Figs.10 and 11) Prior to performing the following procedure, remove 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

37、 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 assembly 1-14 (No.MA216) 3.2.6Removing the loading / feed motor assembly (See Figs.12 and 13) Prior to performing the following procedure, remove the t

38、op cover, connector board and chassis unit. (1) Remove the screw C and move the loading / feed motor assembly in the direction of the arrow to remove it from the chassis rivet assembly. (2) Disconnect the wire from the loading / feed motor assembly if necessary. CAUTION: When reassembling, connect t

39、he 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 C (No.MA216)1-15 3.2.7Removing the pickup unit (See Figs.14 to 18) Prior to performing the following procedure, remove the top cover, connector bo

40、ard 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 feed sw. holder in the di

41、rection of the arrow. The joint g of the pickup unit and the feed rack is released, and the feed sw. holder comes off. (4) Remove the pu. shaft from the pickup unit. (5) Remove the screw F attaching the feed rack to the pickup unit. 3.2.8Reattaching the pickup unit (See Figs.14 to 17) (1) Reattach t

42、he feed rack to the pickup unit using the screw F. (2) Reattach the feed sw. holder to the feed rack while setting the joint g to the slot of the feed rack and setting the part f of the feed rack to the switch of the feed sw. holder correct- ly. (3) As the feed sw. holder is temporarily attached to

43、the pickup unit, set to the gear of the joint g and to the bending part of the chassis (joint h) at a time. CAUTION: Make sure that the part i on the underside of the feed rack is certainly inserted to the slot j of the change lock lever. (4) Reattach the feed sw. holder using the screw E. (5) Reatt

44、ach the pu. shaft to the pickup unit. Reattach the pu. shaft holder to the pu. shaft using the screw D. Fig.14 Fig.15 Fig.16 Fig.17 Fig.18 Feed sw. holder E D Joint g Joint f Part e Pickup unit Pu. shaft holder Pu. shaft Feed sw. holder Part e Pickup unit Feed rack Feed sw. holder D E Joint f Pu. sh

45、aft holder Pu. shaft Pickup unit Joint h Part i Slot j Joint g FFeed rack Pickup unit Joint f Joint g Feed rack Pickup unit Feed sw. holder 1-16 (No.MA216) 3.2.9Removing the trigger arm (See Figs.19 and 20) Prior to performing the following procedure, remove the top cover, connector board and clampe

46、r unit. (1) Turn the trigger arm in the direction of the arrow to release the joint k and pull out upward. CAUTION: When reassembling, insert the part m and n of the trigger arm into the part p and q at the slot of the chassis rivet assembly respectively and join the joint k at a time. Fig.19 Fig.20

47、 3.2.10 Removing the top plate assembly (See Fig.21) Prior to performing the following procedure, remove the top cover, connector board, chassis unit, and clamper assembly. (1) Remove the screw H. (2) Move the top plate assembly in the direction of the arrow to release the two joints r. (3) Unsolder

48、 the wire marked s if necessary. Fig.21 Joint k Trigger arm Chassis rivet assembly Trigger arm Chassis rivet assembly Part p Part m Part n Part q Top plate assembly Joints r s H (No.MA216)1-17 3.2.11 Removing the mode sw. / select lock arm (See Figs.22 and 23) Prior to performing the following proce

49、dure, remove the top plate assembly. (1) Bring up the mode sw. to release from the link plate (joint t) and turn in the direction of the arrow to release the joint u. (2) Unsolder the wire of the mode sw. marked s if necessary. (3) Turn the select lock arm in the direction of the arrow to re- lease the two joints v. (4) The select lock arm spring comes off the select lock arm at the same time. Fig.22 Fig.23 Mode sw. Select lock arm Joint tLink plate Joint u s Top plate Top plate Select lock arm Select lock arm spring Select