Jvc-KSFX-942-R-Service-Manual(1) 电路图 维修手册.pdf

《Jvc-KSFX-942-R-Service-Manual(1) 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Jvc-KSFX-942-R-Service-Manual(1) 电路图 维修手册.pdf（31页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITED No.49848 2003/6 CASSETTE RECEIVER 4984820036 KS-FX942R TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SP

2、ECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 4A

3、DJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20 5TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . 1-24 6DESCRIPTION OF MAJOR ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 SOUND VOLVOL SOURCERF U D ATT KS-FX942R Area Suffix E - Continental Europe RadioFans.CN 收音机爱 好者资料库 (No.49848)1-9 3.2Cassette mechanism assembly

5、REFERENCE: Prior to performing the following procedures, turn the mode gear on the bottom of the body until the respective part comes to the EJECT position (Refer to Fig.1). Fig.1 3.2.1Removing the cassette guide (See Fig.2) (1) Turn the mode gear to set to RVS play or subsequent mode. (2) Remove th

6、e cassette guide from the main chassis while re- leasing each two joint tabs a in the direction of the arrow. Fig.2 3.2.2Removing the load arm (See Fig.3) (1) Remove the E-washer attaching the load arm. (2) Move the load arm in the direction of the arrow and release the joint b on the cassette catch

7、. Fig.3 Mode gear Cassette guide Tab a Tab a Load arm E-washer Joint b RadioFans.CN 收音机爱 好者资料库 1-10 (No.49848) 3.2.3Removing the cassette hanger assembly / cassette holder (See Fig.4 to 7) (1) Check the mode is set to EJECT. Push down the front part of the cassette holder and move in the direction o

8、f the ar- row to release the joint c. (2) Move the rear part of the cassette hanger assembly in the direction of the arrow to release it from the two joint bosses d. (3) Release the holder stabilizer spring from the hooks e and f, then pull out from the cassette hanger assembly. (4) Bring up the rea

9、r side of the cassette hanger assembly to release the joint g and h. (5) Pull out the cassette catch from the cassette hanger as- sembly. Fig.4 Fig.5 Fig.6 Fig.7 Cassette holder assembly Side bracket Joints c Cassette holder assembly Cassette hanger assembly Boss d Boss d Cassette hanger assembly Ca

10、ssette stabilizer spring Hook f Hook e Cassette hanger assembly Hook h Hook g Cassette holder assembly Cassette holder assembly Cassette hanger assembly Cassette catch RadioFans.CN 收音机爱 好者资料库 (No.49848)1-11 3.2.4Removing the side bracket assembly (See Fig.8 to 10) (1) Remove the screw A attaching th

11、e side bracket assembly. (2) Detach the front side of the side bracket assembly upward and pull out forward to release the joint i and j in the rear. CAUTION: When reassembling, make sure that the boss k of the main chassis is set in the notch of the load rack under the side bracket assembly. Do not

12、 reattach the load rack on the boss k. CAUTION: After reattaching the side bracket assembly, confirm op- eration. Fig.8 Fig.9 Fig.10 A Side bracket assembly Side bracket assembly Joint i Joint j Joint i Joint j Side bracket assembly Boss k Load rack Boss k Load rack 1-12 (No.49848) 3.2.5Removing the

13、 pinch arm (F) assembly (See Fig.11 and 12) (1) Remove the polywasher and pull out the pinch arm (F) as- sembly. (2) Remove the compulsion spring. 3.2.6Removing the pinch arm (R) assembly (See Fig.11 and 12) (1) Remove the polywasher and pull out the pinch arm (R) as- sembly. 3.2.7Removing the slide

14、 chassis assembly (See Fig.13 and 14) REFERENCE: It is not necessary to remove the head and the tape guide. (1) Move the slide chassis assembly in the direction of the ar- row to release the two joints l and remove from the main chassis. (2) Remove the rack link. CAUTION: When reassembling, first re

15、attach the rack link, and next fit the boss m and hook n of the slide chassis assembly to the hole of the main chassis, and engage the two joints l. Fig.11 Fig.12 Fig.13 Fig.14 Polywasher Polywasher Pinch arm (F) assembly Pinch arm (R) assembly Polywasher Pinch arm (F) assembly Compulsion spring Pin

16、ch arm (R) assembly Polywasher Slide chassis assembly Joint l Joint l Boss m Hook n Rack link Head Tape guide (No.49848)1-13 3.2.8 Removing the head / tape guide (See Fig.16 and 17) REFERENCE: It is not necessary to remove the slide chassis assembly. (1) Remove the band attaching the wire to the hea

17、d. (2) Remove the two screws B, the head and the head support spring. (3) Remove the pinch arm spring from the tape guide. (4) Remove the tape guide and the pinch spring arm. CAUTION: When reattaching the pinch arm spring, set both end of it to the pinch spring arm (remarked o). CAUTION: When reatta

18、ching the head, set the wires into the groove of the tape guide (Fig.16). 3.2.9Removing the flywheel assembly (F) & (R) (See Fig.18 and 19) REFERENCE: It is not necessary to remove the slide chassis assembly. (1) Remove the belt at the bottom. (2) Remove the two polywashers on the upper side. (3) Pu

19、ll out each flywheel assembly downward. Fig.15 Fig.16 Fig.17 Fig.18 B Slide chassis assembly Head Tape guide B Pinch arm spring Head Head support spring Tape guide Pinch spring arm Slid chassis assembly o o Flywheel assembly (F) Flywheel assembly (R) Belt Polywasher Polywasher Flywheel assembly (F)

20、Flywheel assembly (R) 1-14 (No.49848) 3.2.10 Disassembling the flywheel assembly (F) (See Fig.19 and 20) (1) Push and turn counterclockwise the spring holder (F) to re- lease the three joints p on the bottom of the flywheel. (2) The spring holder (F), the TU spring and the friction gear play come of

21、f. (3) Remove the polywasher and felt. 3.2.11 Disassembling the flywheel assembly (R) (See Fig.19 and 20) (1) Push and turn clockwise the spring holder (R) to release the three joints q on the bottom of the flywheel. (2) The spring holder (R), the FF spring and the friction gear FF come off. (3) Rem

22、ove the polywasher and the felt. 3.2.12 Removing the reel board (See Fig.21 and 22) (1) Remove the two screws C attaching the reel board. (2) Move the reel board in the direction of the arrow to release the joint r. (3) Unsolder the wires if necessary. CAUTION: When reattaching, confirm operation of

23、 the MODE switch and the ST-BY switch.The mode position be- tween EJECT and ST-BY is optimum for reattach- ing.Connect the card wire extending from the reel board to the FFC pad before reattaching the reel board. Fig.19 Fig.20 Fig.21 Fig.22 Flywheel assembly (F) Flywheel assembly (R) Joints p Joint

24、p Joints q Joint q Polywasher Spring holder (F) TU spring Polywasher Spring holder (R) FF spring Friction gear play Friction gear FF Flywheel assembly (F) Flywheel assembly (R) Felt Felt FFC pad Joint r Reel board C C FFC pad CT-1 switch ST-BY switch Soldering MODE switch (No.49848)1-15 3.2.13 Remov

25、ing the gear base arm / gear base link assembly (See Fig.23 to 25) (1) Move the gear base arm in the direction of the arrow. (2) Insert a slotted screwdriver to the gear base spring under the gear base arm, and release the gear base arm upward from the boss on the gear base assembly. (3) Remove the

26、gear base arm from the main chassis while re- leasing the two joints s. (4) Move the gear base link assemby in the direction of the ar- row to release the two joints t. REFERENCE: When reattaching the gear base arm, make sure that the boss on the gear base assembly is inside the gear base spring. 3.

27、2.14 Removing the FFC pad (See Fig.25 and 27) (1) Push each joint hook u of the FFC pad and remove toward the bottom. Fig.23 Fig.24 Fig.25 Gear base link assembly Gear base arm FFC pad Joint t Joint t Joints s Hook u Hook u Gear base arm Screwdriver Gear base spring FFC pad Gear base link assembly G

28、ear base arm 1-16 (No.49848) 3.2.15 Removing the mode gear (See Fig.26 and 29) (1) Remove the polywasher on the bottom and pull out the mode gear. 3.2.16 Removing the mode switch actuator (See Fig.26, 27 and 29) (1) Pull out the mode switch actuator at the bottom. REFERENCE: When reattaching the mod

29、e switch actuator to the main chassis, make sure to set on the shaft and insert v into the slot w. 3.2.17 Removing the direction link / direction plate (See Fig.27 to 29) (1) Remove the polywasher attaching the direction link. (2) Bring up the direction link to release the three joints x, y and z at

30、 a time. (3) Move the direction plate in the direction of the arrow to re- lease the two joints a. REFERENCE: When reattaching the direction plate, engage the two joints a and move in the direction of the arrow (Refer to Fig.28). REFERENCE: When reattaching the direction link, move the direction pla

31、te in the direction of the arrow and engage the three joint x, y and z at a time (Refer to Fig.29). 3.2.18 Removing the mode rack assembly (See Fig.27 and 28) (1) Move the mode rack assembly in the direction of the arrow to release the two joints b and the joint c. REFERENCE: When reattaching, set t

32、he two b on the bottom of the mode rack assembly into the slots of the main chassis and move in the direction of the arrow (See Fig.28). Fig.26 Fig.27 Fig.28 Fig.29 Polywasher Mode switch actuator Mode gear Direction plate Direction link Mode rack assembly Slot w Direction plate Joints a Joint z Dir

33、ection link Polywasher Joint y Joint x Direction plate Mode rack assembly Joint c Joint b Joint b Joints a Polywasher Mode gear Mode switch actuator Direction link Direction plate Mode rack assembly v (No.49848)1-17 3.2.19 Removing the gear base assembly / take up gear / reflector gear (See Fig.30 t

34、o 32) (1) Push in the pin d of the gear base assembly on the upper side of the body and move the reflector gear toward the bottom, then pull out. (2) Remove the polywasher on the bottom and pull out the take up gear. (3) Move the gear base assembly in the direction of the arrow to release it from th

35、e two slots e of the main chassis. REFERENCE: The parts are damaged when removed. Please replace with new ones. 3.2.20 Removing the reel driver / reel spindle (See Fig.32) (1) Draw out the reel driver from the shaft on the main chassis and remove the reel driver spring and the reel spindle re- spect

36、ively. CAUTION: The reel driver is damaged when removed. Please re- place with a new one. Fig.30 Fig.31 Fig.32 Gear base assembly Pin d Slot e Slot e Polywasher Reflector gear Take up gear Reel driver spring Reel driver spring Reel driver Reel driver Reel spindle Reel spindle Gear base assembly Slot

37、s e Main chassis Reflector gear Polywasher Take up gear 1-18 (No.49848) 3.2.21 Removing the side bracket assembly (See Fig.33 to 37) (1) Remove the eject cam plate spring. (2) Push the joint f through the slot to remove the load rack downward. (3) Move the eject cam limiter in the direction of the a

38、rrow to release it from the boss g of the side bracket assembly and from the two joints h. (4) Move the eject cam plate in the direction of the arrow to re- lease the joint i. CAUTION: When reassembling, confirm operation of each part be- fore reattaching the eject cam plate spring. Fig.33 Fig.34 Fi

39、g.35 Fig.36 Fig.37 Joint f Load rack Eject cam plate spring Eject cam limiter Side bracket assembly Boss g Joint h Load rack Joint f Joint h Boss g Eject cam limiter Side bracket assembly Joint h Joint h Eject cam plate Side bracket assembly Boss g Joint i Eject cam plate Side bracket assembly Eject

40、 cam plate Joint i (No.49848)1-19 3.2.22 Removing the main motor assembly / sub motor assembly (See Fig.38 to 40) (1) Remove the belt at the bottom. (2) Remove the polywasher and pull out the mode gear. (3) Pull out the reduction gear (B). (4) Remove the polywasher and pull out the reduction gear (A

41、). (5) Remove the two screws attaching the main motor assem- bly. (6) Remove the two screws E attaching the sub motor assem- bly. (7) Unsolder the wires on the reel board if necessary. CAUTION: When reassembling, adjust the length of the wires ex- tending from the sub motor asswmbly by attaching the

42、m to the side of the sub motor assembly with the wires ex- tending from the main motor assembly using a spacer. Fig.38 Fig.39 Fig.40 Belt Polywasher Polywasher Mode gear Reduction gear (A) Main motor assembly D Sub motor assembly E Reduction gear (B) Polywasher Reduction gear (B) Reduction gear (A)

43、E D Main motor assembly Sub motor assembly Spacer Spacer Sub motor assembly Main motor assembly (No.49848)1-21 ? ? Information for using a car audio service jig (1) Were advancing efforts to make our extension cords common for all car audio products. Please use this type of extension cord as follows

44、. (2) As a U-shape type top cover is employed, this type of extension cord is needed to check operation of the mechanism assembly after disassembly. (3) Extension cord : EXTKSRT002-18P ( 18 pin extension cord ) For connection between mechanism assemblyand main board. (4) Check for mechanism driving

45、section such as motor ,etc. ? ? Disassembly method (1) Remove the front panel assembly. (2) Remove the bottom cover. (3) Remove the front chassis. (4) Remove the heat sink. (5) Remove the rear panel (6) Remove the main board. (7) Reattach the heat sink with the two screws B. (Refer to Disassembly me

46、thod.) (8) Reattach the rear panel with the screw E. (Refer to Disassembly method.) (9) Reattach the front panel assembly. (10) Confirm that current is being carried by connecting an extension cord jig. NOTE: Available to connect to the CJ601 connector when installing the front panel. CAUTION : Be s

47、ure to attach the heat sink and rear panel on the power amplifier IC and regulator IC of a main board when supplying the power.If voltage is applied without attaching those parts, the power amplifier IC and regulator IC will be destroyed by heat. Front panel assembly Extension cord EXTKSRT002-18P Ma

48、in board Cassette mechanism EXTKSRT002-18P To Main board To Cassette mechanism 1-22 (No.49848) ? ? Arrangement of adjusting & test points Head section view Cassette mechanism (Surface) Azimuth screw A (Forward) Playback head Tape speed adjust Motor assembly Azimuth screw B (Reverse) Azimuth screw A

49、(Forward) Playback head Azimuth screw B (Reverse) (No.49848)1-23 The tuner section is of an adjustment-freedesign. In case the tuner is in trouble, replace the tuner pack. ItemConditionsAdjustment and Confirmation methodsS.ValuesAdjust 1. Head azi- muth adjust- ment Test tape: SCC-1659 VT703 (10kHz) ?Head height adjustment Adjust the azimuth directly. When you adjust the height using a mirror tape, remove the cassette housing from the mechanism chassis. After installing the cassette housing, perform the azimuth adjustment. (1) Load the SCC-1659 mirror tape. Ad