Jvc-KDS-283-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITED No.49871 2003/10 CD RECEIVER 4987120039 KD-S283 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC

2、SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4ADJUSTME

3、NT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

4、5 Area suffix UF - China COMPACT DIGITAL AUDIO RadioFans.CN 收音机爱 好者资料库 1-2 (No.49871) SPECIFICATION Design and specifications are subject to change without notice. AUDIO AMPLIFIERSECTION Maximum Power Output Front45W per channel Rear45W per channel Continuous Power Output (RMS) Front17W per channel

5、into 4 , 40 Hz to 20000 Hz at no more than 0.8% total harmonic distortion. Rear17W per channel into 4 , 40 Hz to 20000 Hz at no more than 0.8% total harmonic distortion. Load Impedance4 (4 to 8 allowance) Tone Control Range Bass10 dB at 100 Hz Treble10 dB at 10 kHz Frequency Response40 Hz to 20000 H

6、z Signal-to-Noise Ratio70 dB Line-Out Level/Impedance2.0 V/20 k load (full scale) Output Impedance1 k TUNER SECTION Frequency RangeFM87.5 MHz to 108.0 MHz AM531 kHz to 1602 kHz FM TunerUsable Sensitivity11.3 dBf (1.0 uV/75 ) 50 dB Quieting Sensitivity16.3 dBf (1.8 uV/75 ) Alternate Channel Selectivi

7、ty (400 kHz) 65 dB Frequency Response40 Hz to 15000 Hz Stereo Separation35 dB Capture Ratio1.5 dB AM TunerSensitivity20 uV Selectivity35 dB CD PLAYER SECTION TypeCompact disc player Signal Detection SystemNon-contact optical pickup (semiconductor laser) Number of channels2 channels (stereo) Frequenc

8、y Response5 Hz to 20000 Hz Dynamic Range90 dB Signal-to-Noise Ratio95 dB Wow and flutterLess than measurable limit GENERAL Power Requirement Operating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Operating Temperature0C to +40C Dimensions (W H D) Installation S

9、ize (approx.)182 mm 52 mm 150 mm Panel size (approx.)188 mm 58 mm 11 mm Mass (approx.)1.3 kg RadioFans.CN 收音机爱 好者资料库 (No.49871)1-3 SECTION 1 PRECAUTION 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 cas

10、e 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.49871) 1.2Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored

11、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 diode) in d

12、evices such as CD players. 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)

13、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. After replacemen

14、t, 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) Do not subject t

15、he 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-static pin when rep

16、lacing 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 turn it. 1.4Atten

17、tion when traverse unit is 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

18、 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 PickupShort-circu

19、it point (No.49871)1-5 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.49871) SECTION 3 DISASSEMBLY 3.1Main body 3.1.1Removing the front panel assembly (See Fig.1) (1) Press the release button and remove the front panel as- sembly.

20、 Fig.1 3.1.2Removing the bottom cover (See Figs.2) (1) Turn over the main body and release the two joints a, two joints b and joint c. CAUTION: Do not damage the main board when releasing the joints using a screwdriver. Fig.2 3.1.3Removing the front chassis assembly (See Figs.3) Prior to performing

21、the following procedure, remove the front panel assembly and bottom cover. (1) Remove the screws A on the left side of the main body. (2) Release the two joints d and joints e on the both sides of the main body, then remove the front chassis assembly to- ward the front. Fig.3 Front panel assembly Re

22、lease button Joint a Bottom cover Joint a Joint c Joint b Joint b A Joint dJoint e Joint d Front chassis assembly Joint e (No.49871)1-7 3.1.4Removing the heat sink (See Fig.4) Prior to performing the following procedure, remove the front panel assembly as required. (1) Remove the two screws B and sc

23、rew C on the left side of the main body. Fig.4 3.1.5Removing the rear bracket (See Fig.5) Prior to performing the following procedures, remove the bot- tom cover. (1) Remove the three screws D, three screws E and two screws F on the back side of the main body. (2) Remove the rear bracket. Fig.5 3.1.

24、6Removing the main board (See Fig.6) Prior to performing the following procedures, remove the front panel assembly, bottom cover, front chassis assembly, heat sink and rear bracket. (1) Remove the two screws G attaching the main board. (2) Disconnect the connector CN501 and remove the main board. Fi

25、g.6 B C Heat sink E Rear bracket F DED F G Main board G CN501 1-8 (No.49871) 3.1.7Removing the CD mechanism assembly (See Fig.7) Prior to performing the following procedure, remove the front panel assembly, bottom cover, front chassis assembly, heat sink, rear bracket and main board. (1) Remove the

26、three screws H attaching the CD mechanism assembly to the top chassis. Fig.7 3.1.8Removing the front board (See Figs. 8 to 10) Prior to performing the following procedures, remove the front panel assembly. (1) Remove the four screws J on the back side of the front pan- el assembly. (See Fig.8) (2) R

27、elease the eleven joints f attaching the rear cover to the front panel assembly. (See Fig.9) (3) Take out the front board from the front panel assembly. (See Fig.10) Fig.8 Fig.9 Fig.10 H CD mechanism assembly Top chassis H JJ J Front panel assembly Front panel assembly Rear cover fJoints Joints f Jo

28、ints f fJoints Front board Front panel assembly (No.49871)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 top cover and move the top cover backward to release the two joints a. Fig.1

29、Fig.2 A A A Joints aTop cover Joints a Top cover 1-10 (No.49871) 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 pickup. No observance of this in- struction may cause damage of the pickup. (1)

30、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 the two joints b. (5) Unsolder the wire on the connector board if necessar

31、y. 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 board Frame (No.49871)1-11 3.2.3Removing the DET switch (See Figs.6 and 7) (1)

32、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 (No.49871) 3.2.4Removing the chassis unit (See Figs.8 and 9) Prior to perform

33、ing 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- ferent. Handle them with care. When reassembling, make sure that the thre

34、e 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 Shafts Shaft Damper Damper Damper (No.49871)1-13 3.2.5Removing the clamper as

35、sembly (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 Fig.11 Clamper arm spring Chassis rivet assembly Joint d Joint d Clamper a

36、ssembly Clamper arm spring Clamper assembly Joint d Joint d Chassis rivet assembly 1-14 (No.49871) 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

37、 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 the wire from the loading / feed motor assembly to the flame as shown in Fig

38、.12. Fig.12 Fig.13 Loading / feed motor assembly Loading / feed motor assembly C (No.49871)1-15 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 hol

39、der 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 direction of the arrow. The joint g of the pickup unit and the feed rack is r

40、eleased, 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 the feed rack to the pickup unit using the screw F. (2) Reattach the feed sw

41、. 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 the pickup unit, set to the gear of the joint g and to the bending part of

42、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) Reattach the pu. shaft to the pickup unit. Reattach the pu. shaft holder to the

43、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. shaft holder Pu. shaft Pickup unit Joint h Part i Slot j Joint g FFeed rack P

44、ickup unit Joint f Joint g Feed rack Pickup unit Feed sw. holder 1-16 (No.49871) 3.2.9Removing the trigger arm (See Figs.19 and 20) Prior to performing the following procedure, remove the top cover, connector board and clamper unit. (1) Turn the trigger arm in the direction of the arrow to release t

45、he 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 3.2.10 Removing the top plate assembly (See Fig.21) Prior to performing th

46、e 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 the wire marked s if necessary. Fig.21 Joint k Trigger arm Chassis rivet a

47、ssembly Trigger arm Chassis rivet assembly Part p Part m Part n Part q Top plate assembly Joints r s H (No.49871)1-17 3.2.11 Removing the mode sw. / select lock arm (See Figs.22 and 23) Prior to performing the following procedure, remove the top plate assembly. (1) Bring up the mode sw. to release f

48、rom 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

49、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 lock arm Link plate Joints v Hook w 1-18 (No.49871) 3.2.12 Reassembling the mode sw. / select lock arm (See Figs.24 to 26) REFERENCE: Reverse the above removing procedure. (1) Reattach the select lock arm spring to the top plate and set the shorter end of the select lock arm spring to the hook w on the top plate. (2) Set the other longer end of the select