Jvc-KSFX-925-R-Service-Manual(1) 电路图 维修手册.pdf

SERVICE MANUAL CASSETTE RECEIVER No.49742 May. 2002 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. KS-FX925R KS-FX925R Contents Safety precaution Disassembly method Adjustment method Description of major ICs 1- 2 1- 3 1-11 1-1526 Area Suffix EE - Russian Federation TAPE DAB EQ SOUND VOLVOL SOURCERF U D ATT RadioFans.CN 收音机爱 好者资料库 KS-FX925R 1-2 ! 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. Safety precaution RadioFans.CN 收音机爱 好者资料库 KS-FX925R 1-3 Press the release switch and remove the front panel unit in the direction of the arrow. 1. Disassembly method Removing the front panel unit (See Fig.1) Turn the body upside down. Insert a screwdriver to the two joints a and two joints b on both sides of the body and the joint c on the back of the body, then detach the bottom cover from the body. 1. 2. Removing the bottom cover (See Fig.2,3) When disengaging the joint c using a screwdriver, do not damage or break the board. CAUTION: Prior to performing the following procedure, remove the bottom cover. Remove the two screws A attaching the front chassis. Remove the two screws B on each side of the body. Release the two joints d and the two joints e on the sides. remove the front chassis toward the front. 1. 2. 3. Removing the front chassis (See Fig.4,5) Fig.4 Fig.1 Fig. 5 Fig. 2 Bottom cover Joint a Joint b Joint c Fig. 3 Bottom cover Joint a Joint b Joint c Front panel unit Front chassis A B Front chassis Joint d Joint d Joint e Joint e RadioFans.CN 收音机爱 好者资料库 KS-FX925R 1-4 Prior to performing the following procedure, remove the front chassis, the heat sink and bottom cover. Remove the five screws D attaching the rear panel and one screw E attaching the pine jack on the back of the body. 1. Removing the rear panel (See Fig.7 ) Remove the four screws C attaching the heat sink on the left side of the body, and remove the heat sink. 1. Removing the heat sink (See Fig.6) Prior to performing the following procedure, remove the front chassis, the heat sink, bottom cover and the rear panel. Remove the two screws F attaching the main amplifier board assembly on the top cover. Disconnect connector CP401 on the main amplifier board assembly from the cassette mechanism assembly. 1. 2. Removing the main amplifier board assembly (See Fig.8) Fig. 7 D D D E Rear panel Heat sink Fig. 6 CCC Fig. 8 Main board assembly CP401 F F KS-FX925R 1-5 Prior to performing the following procedure, remove the front chassis, the heat sink, bottom cover and the main amplifier board assembly. Remove the four screws G attaching the cassette mechanism assembly from the top cover. 1. Removing the cassette mechanism assembly (See Fig.9) Removing the (LCD & key) control switch board (See Fig.10 to 12) Prior to performing the following procedure, remove the front panel assembly. Remove the four screws H attaching the rear cover on the back of the front panel assembly. Unjoint the nine joints f with the front panel and the rear cover. Remove the control switch board on the back of the front panel. 1. 2. 3. Cassette mechanism assembly G G Top cover Fig. 9 HH HH Fig. 10 Fig. 12 Fig. 11 LCD & Key control board G G Joint f Joint f Joint f Joint f Front panel Rear cover KS-FX925R 1-6 Remove the screw A attaching the reinforce bracket on the bottom of the body. To release joint a, turn and detach the reinforce bracket from the side bracket assembly as shown in Fig.2 1. 2. Removing the reinforce bracket (See Fig.1 and 2) Turn the mode gear to set to RVS play or subsequent mode. Remove the cassette guide from the main chassis while releasing each two joint tabs b in the direction of the arrow. 1. 2. Removing the cassette guide (See Fig.3) Remove the screw B on the upper side. Unsolder the wires on the under side of the head board, if necessary. 1. Removing the head board (See Fig.4) 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). REFERENCE: When reassembling, twist the wires by turning the head board twice remarked c and pass through the notch d as shown in Fig.4. REFERENCE: Head board Fig.1 Fig.2 Fig.4Fig.3 Mode gear Reinforce bracket Reinforce bracket Joint a Cassette guide Tab b Tab b B Head board notch d c Soldering A KS-FX925R 1-7 Check the mode is set to EJECT. Push down the front part of the cassette holder and move in the direction of the arrow to release the joint f. Move the rear part of the cassette hanger assembly in the direction of the arrow to release it from the two joint bosses g. Release the holder stabilizer spring from the hooks h and i, then pull out from the cassette hanger assembly. Bring up the rear side of the cassette hanger assembly to release the joint j and k. Pull out the cassette catch from the cassette hanger assembly. 1. 2. 3. 4. 5. Removing the cassette hanger assembly / cassette holder (See Fig.6 to 9) Remove the E-washer attaching the load arm. Move the load arm in the direction of the arrow and release the joint e on the cassette catch. 1. 2. Removing the load arm (See Fig.5) Fig.5 Fig.6 Fig.7 Fig.9 Fig.8 Load arm E-washer Joint e Cassette holder assembly Cassette holder assembly Side bracket Joints f Cassette holder assembly Cassette hanger assembly Cassette hanger assembly Cassette hanger assembly Boss g Boss g Cassette hanger assembly Cassette stabilizer spring Hook i Hook k Hook h Hook j Cassette holder assemblyCassette catch KS-FX925R 1-8 Remove the screw C attaching the side bracket assembly. Detach the front side of the side bracket assembly upward and pull out forward to release the joint l and m in the rear. 1. 2. Removing the side bracket assembly (See Fig.10 to 12) When reassembling, make sure that the boss n of the main chassis is set in the notch of the load rack under the side bracket assembly. Do not reattach the load rack on the boss n. CAUTION: After reattaching the side bracket assembly, confirm operation. CAUTION: Fig.11 Fig.12 Fig.10 C Side bracket assembly Side bracket assembly Joint l Joint m Side bracket assembly Boss n Load rack Boss n Load rack Joint l Joint m KS-FX925R 1-9 Remove the polywasher and pull out the pinch arm (F) assembly. Remove the compulsion spring. 1. 2. Removing the pinch arm (F) assembly (See Fig.13 and 14) Remove the polywasher and pull out the pinch arm (R) assembly. 1. Removing the pinch arm (R) assembly (See Fig.13 and 15) Move the slide chassis assembly in the direction of the arrow to release the two joints o and remove from the main chassis. Remove the rack link. 1. 2. Removing the slide chassis assembly (See Fig.16 and 17) When reassembling, first reattach the rack link, and next fit the boss p and hook q of the slide chassis assembly to the hole of the main chassis, and engage the two joints o. CAUTION: It is not necessary to remove the head and the tape guide. REFERENCE: Fig.13 Fig.17 Fig.14 Fig.15 Fig.16 Polywasher Polywasher Pinch arm (F) assembly Pinch arm (R) assembly Polywasher Pinch arm (F) assembly Compulsion spring Pinch arm (R) assembly Polywasher Slide chassis assembly Joint o Joint o Boss p Hook q Rack link Head Tape guide KS-FX925R 1-10 Remove the band attaching the wire to the head. Remove the two screws D, the head and the head support spring. Remove the pinch arm spring from the tape guide. Remove the tape guide and the pinch spring arm. 1. 2. 3. 4. Removing the head / tape guide (See Fig.18 and 19) Remove the belt at the bottom. Remove the two polywashers on the upper side. Pull out each flywheel assembly downward. 1. 2. 3. Removing the flywheel assembly (F) & (R) (See Fig.20 and 21) When reattaching the pinch arm spring, set both end of it to the pinch spring arm ( remarked r). CAUTION: When reattaching the head, set the wires into the groove of the tape guide (Fig.18). CAUTION: It is not necessary to remove the slide chassis assembly. REFERENCE: It is not necessary to remove the slide chassis assembly. REFERENCE: Fig.19 Fig.21 Fig.18 Fig.20 D Slide chassis assembly Head Tape guide D Pinch arm spring Head Head support spring Tape guide Pinch spring arm Slid chassis assembly Flywheel assembly (F) Flywheel assembly (R) BeltPolywasher Polywasher Flywheel assembly (F) Flywheel assembly (R) r r KS-FX925R 1-11 Push and turn counterclockwise the spring holder (F) to release the three joints s on the bottom of the flywheel. The spring holder (F), the TU spring and the friction gear play come off. Remove the polywasher and felt. 1. 2. 3. Disassembling the flywheel assembly (F) (See Fig.22 and 23) Push and turn clockwise the spring holder (R) to release the three joints t on the bottom of the flywheel. The spring holder (R), the FF spring and the friction gear FF come off. Remove the polywasher and the felt. 1. 2. 3. Disassembling the flywheel assembly (R) (See Fig.22 and 24) Remove the two screws E attaching the reel board. Move the reel board in the direction of the arrow to release the joint u. Unsolder the wires if necessary. 1. 2. 3. Removing the reel board (See Fig.25 and 26) When reattaching, confirm operation of the MODE switch and the ST-BY switch. The mode position between EJECT and ST-BY is optimum for reattaching. Connect the card wire extending from the reel board to the FFC pad before reattaching the reel board. CAUTION: Fig.26 Fig.22 Fig.23Fig.24 Fig.25 Flywheel assembly (F) Flywheel assembly (R) Joints s Joint s Joints t Joint t Polywasher Spring holder (F) TU spring Polywasher Spring holder (R) FF spring Friction gear play Friction gear FF Flywheel assembly (F) Flywheel assembly (R) FFC pad FFC pad Joint u Reel board E E CT-1 switch ST-BY switch Soldering MODE switch Felt Felt KS-FX925R 1-12 Move the gear base arm in the direction of the arrow. 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. Remove the gear base arm from the main chassis while releasing the two joints v. Move the gear base link assemby in the direction of the arrow to release the two joints w. 1. 2. 3. 4. Removing the gear base arm / gear base link assembly (See Fig.27 to 29) Push each joint hook x of the FFC pad and remove toward the bottom. 1. Removing the FFC pad (See Fig.27 and 29) When reattaching the gear base arm, make sure that the boss on the gear base assembly is inside the gear base spring. REFERENCE: Fig.27 Fig.28 Fig.29 FFC pad Gear base link assembly Gear base arm Gear base link assembly Gear base arm FFC pad Joint w Joint w Joints v Hook x Hook x Gear base arm Screwdriver Gear base spring KS-FX925R 1-13 Remove the polywasher on the bottom and pull out the mode gear. 1. Removing the mode gear (See Fig.30 and 33) Move the mode rack assembly in the direction of the arrow to release the two joints k and the joint l. 1. Removing the mode rack assembly (See Fig.31 and 32) Remove the polywasher attaching the direction link. Bring up the direction link to release the three joints a, b and c at a time. Move the direction plate in the direction of the arrow to release the two joints d. 1. 2. 3. Removing the direction link / direction plate (See Fig.31 to 33) When reattaching, set the two k 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.32). REFERENCE: Pull out the mode switch actuator at the bottom.1. Removing the mode switch actuator (See Fig.30, 31 and 33) When reattaching the mode switch actuator to the main chassis, make sure to set on the shaft and insert y into the slot z. REFERENCE: When reattaching the direction plate, engage the two joints d and move in the direction of the arrow (See Fig.32). REFERENCE: When reattaching the direction link, move the direction plate in the direction of the arrow and engage the three joint a, b and c at a time (See Fig.33). REFERENCE: Fig.30 Fig.32 Fig.33 Fig.31 Polywasher Mode switch actuator Mode gear Direction plate Direction link Mode rack assembly Slot z Direction plate Joints d Joint c Direction link Polywasher Joint b Joint a Direction plateMode rack assembly Joint l Joint k Joint k Polywasher Mode gear Mode switch actuator Direction link Joints d Direction plate Mode rack assembly y KS-FX925R 1-14 Push in the pin e of the gear base assembly on the upper side of the body and move the reflector gear toward the bottom, then pull out. Remove the polywasher on the bottom and pull out the take up gear. Move the gear base assembly in the direction of the arrow to release it from the two slots f of the main chassis. 1. 2. 3. Removing the gear base assembly / take up gear / reflector gear (See Fig.34 to 36) Draw out the reel driver from the shaft on the main chassis and remove the reel driver spring and the reel spindle respectively. 1. Removing the reel driver / reel spindle (See Fig.36) The reel driver is damaged when removed. Please replace with a new one. CAUTION: The parts are damaged when removed. Please replace with new ones. REFERENCE: Fig.34 Fig.35 Fig.36 Gear base assembly Pin e Slot f Slot f Polywasher Reflector gear Take up gear Reel driver spring Reel driver spring Reel driver Reel driver Reel spindle Reel spindle Gear base assembly Slots f Main chassis Reflector gear Polywasher Take up gear KS-FX925R 1-15 Remove the eject cam plate spring. Push the joint g through the slot to remove the load rack downward. Move the eject cam limiter in the direction of the arrow to release it from the boss h of the side bracket assembly and from the two joints i. Move the eject cam plate in the direction of the arrow to release the joint j. 1. 2. 3. 4. Removing the side bracket assembly (See Fig.37 to 41) When reassembling, confirm operation of each part before reattaching the eject cam plate spring. CAUTION: Fig.37 Fig.39 Fig.41 Fig.38 Fig.40 Joint g Load rack Eject cam plate spring Eject cam limiter Side bracket assembly Boss h Joint i Load rack Joint g Joint i Boss h Eject cam limiter Side bracket assembly Joint i Joint i Eject cam plate Side bracket assembly Boss h Joint j Eject cam plate Side bracket assembly Eject cam plate Joint j KS-FX925R 1-16 Remove the belt at the bottom. Remove the polywasher and pull out the mode gear. Pull out the reduction gear (B). Remove the polywasher and pull out the reduction gear (A). Remove the two screws F attaching the main motor assembly. Remove the two screws G attaching the sub motor assembly. Unsolder the wires on the reel board if necessary. 1. 2. 3. 4. 5. 6. 7. Removing the main motor assembly / sub motor assembly (See Fig.42 to 44) When reassembling, adjust the length of the wires extending from the sub motor asswmbly by attaching them to the side of the sub motor assembly with the wires extending from the main motor assembly using a spacer. CAUTION: Fig.42 Fig.43 Fig.44 Belt Polywashe