Jvc-KDG-401-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LIMITED No.MA051 2004/1 CD RECEIVER MA05120041 KD-G401 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC S

2、ERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4ADJUSTMEN

3、T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

4、 Area suffix E - Continental Europe EX - Central Europe KD-G401 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA051) 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/Impedance2.0 V/20 k load (full scale) Output Impedance1 k TUNER SECTION Frequency RangeFM87.5 MHz to 108.0 MHz AM(MW) 522 kHz to 1 620 kHz (LW) 144 kHz to 279 kHz FM TunerUsable Sensitivity11.3 dBf (1.0 V/75 ) 50 dB Quieting Sensitiv

7、ity16.3 dBf (1.8 V/75 ) Alternate Channel Selectivity (400 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation30 dB Capture Ratio1.5 dB MW TunerSensitivity20 V Selectivity35 dB LW TunerSelectivity50 V CD PLAYER SECTION TypeCompact disc player Signal Detection SystemNon-contact optical

8、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 formatMPEG 1/2 Audio Layer 3 Max. Bit Rate:320 Kbps GENERAL Power RequirementOperating VoltageDC

9、 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.)188 mm 58 mm 11 mm Mass (approx.)1.3 kg (excluding accessories) RadioFans.CN 收音机爱 好者资料库 1-6 (No.MA051) SECTI

10、ON 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 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 scre

11、wdriver 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 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

12、 the front chassis assembly (See Fig.3) 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. (2) Release the two joints d and two joints e on the both sides of the main body, then remove the fr

13、ont chassis assembly toward the front. Fig.3 Front panel assembly Detach button Bottom cover Joint b Joint b Joint c Joint a Joint a Joint d Front chassis assembly A Joint e Joint dJoint e RadioFans.CN 收音机爱 好者资料库 (No.MA051)1-7 3.1.4Removing the side panel (See Fig.4) Prior to performing the followin

14、g procedure, 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, and remove the side panel. Fig.4 3.1.5Removing the rear bracket (See Fig.5) Prior to performing the following procedure, remove the bottom cov

15、er. (1) Remove the three screws D, two screws E and screw F attaching the rear bracket on the back side of the main body. (2) Remove the rear bracket. Reference: Insert the STEERING cable into the slot before attaching the rear bracket to the main body. 3.1.6Removing the main board (See Figs.5 and 6

16、) Prior to performing the following procedures, remove the front panel assembly, bottom cover and side panel. Remove the front chassis assembly as required. (1) 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

17、the main board. (See Fig.6.) (3) Disconnect the connector CN501 on the main board from the main body and take out 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

18、D D EFE Rear bracket D Insert STEERING cable into the slot. Main board G G CN501 Rear bracket 1-8 (No.MA051) 3.1.7Removing the CD mechanism assembly (See Fig. 7) Prior to performing the following procedure, remove the front panel assembly, bottom cover, side panel, rear bracket and main board. Remov

19、e the front chassis assembly as required. (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 front board (See Figs.8 to 10) Prior to performing the following procedures, remove the front panel assembly

20、. (1) Remove the four screws J on the back side of the front panel assembly. (See Fig.8.) (2) Release the ten joints f and remove the rear cover. (See Fig.9.) (3) Release the joint g and take out the front board from the front panel assembly. (See Fig.10.) Fig.8 Fig.9 Fig.10 H H CD mechanism assembl

21、y Top chassis J JJ Joints f Joint fJoints f Joints f Joint f Rear cover Front board Joint gFront panel assembly (No.MA051)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

22、 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.MA051) 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 obser

23、vance 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 the two jo

24、ints 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 board Frame (No

25、.MA051)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 (No.MA051) 3.

26、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- ferent. H

27、andle 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 Shafts Shaft

28、Damper Damper Damper (No.MA051)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 Fig.11 Cla

29、mper 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.MA051) 3.2.6Removing the loading / feed motor assembly (See Figs.12 and 13) Prior to performing the following procedure, remove the top cover, c

30、onnector 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 the wire fro

31、m 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.MA051)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 cha

32、ssis 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 direction of

33、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 the feed rac

34、k 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 the pickup

35、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) Reattach the pu.

36、 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. shaft holder

37、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.MA051) 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)

38、 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 3.2.10 Rem

39、oving 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 the wire m

40、arked 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.MA051)1-17 3.2.11 Removing the mode sw. / select lock arm (See Figs.22 and 23) Prior to performing the following procedure, remov

41、e 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 joi

42、nts 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 lock arm Link plate Joints v Hook w 1-18 (No.MA051) 3.2.12 Reassembling the mode

43、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 lock arm spring to the

44、boss x on the underside of the select lock arm, and join the select lock arm to the slots (joint v). Turn the select lock arm as shown in the figure. (3) Reattach the mode sw. while setting the part t to the first peak of the link plate gear, and join the joint u. CAUTION: When reattaching the mode

45、sw., check if the points y and z are correctly fitted and if each part operates properly. Fig.24 Fig.25 Fig.26 Select lock arm Hook w Boss x Select lock arm spring Joint v Joint v Link plate Joint t Point z Point y Select lock arm Mode sw. Joint t Joint u Link plate (No.MA051)1-19 3.2.13 Removing th

46、e select arm R / link plate (See Figs.27 and 28) Prior to performing the following procedure, remove the top plate assembly. (1) Bring up the select arm R to release from the link plate (joint a) and turn as shown in the figure to release the two joints b and joint c. (2) Move the link plate in the

47、direction of the arrow to release the joint d. Remove the link plate spring at the same time. REFERENCE: Before removing the link plate, remove the mode sw. Fig.27 Fig.28 3.2.14 Reattaching the Select arm R / link plate (See Figs.29 and 30) REFERENCE: Reverse the above removing procedure. (1) Reatta

48、ch the link plate spring. (2) Reattach the link plate to the link plate spring while joining them at joint d. (3) Reattach the joint a of the select arm R to the first peak of the link plate while joining the two joints b with the slots. Then turn the select arm R as shown in the figure. The top pla

49、te is joined to the joint c. CAUTION: When reattaching the select arm R, check if the points e and f are correctly fitted and if each part operates prop- erly. Fig.29 Fig.30 Joint rLink plate Joint b Joint b Joint c Select arm R Joint a Top plate Link plate Link plate spring Joint d Select arm R Joint c Joint d Link plate spring Joint b Joint b Joint a Link plate Joint a Point e Point f 1-20 (No.MA051) 3.2.15 Removing the loading roller assembly (See Figs.31 to 33) Prior to performing the following procedure, remov