JVC KSFX-942-R Service manual
SERVICE MANUAL
CASSETTE RECEIVER
4984820036
KS-FX942R
SOUND
ATT
KS-FX
942
U
SOURCE
F
R
D
VOL
VOL
R
Area Suffix
E ----------- Continental Europe
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
5 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
6 DESCRIPTION OF MAJOR ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.49848
2003/6
3.2 Cassette mechanism assembly
r
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).
3.2.1 Removing the cassette guide
(See Fig.2)
(1) Turn the mode gear to set to RVS play or subsequent
mode.
(2) Remove the cassette guide from the main chassis while re-
leasing each two joint tabs a in the direction of the arrow.
Mode gea
Fig.1
Cassette guide
3.2.2 Removing 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.
Load arm
E-washer
Tab a
Tab a
Fig.2
Joint b
Fig.3
(No.49848)1-9
3.2.3 Removing the cassette hanger assembly / cassette holder
r
(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 of the arrow 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 fro m the hooks e and
f, then pull out from the cassette hanger assembly.
(4) Bring up the rear side of the cassette hanger asse mbly to
release the joint g and h.
(5) Pull out the cassette catch from the cassette hanger as-
sembly.
Cassette holder assembly
Side bracket
Joints c
Cassette holder assembly
Fig.4
Boss d
Cassette hanger
assembly
Boss d
Cassette stabilizer spring
Hook e
Cassette holder
assembly
Hook g
Cassette hange
assembly
Hook f
Fig.5
Cassette hanger
assembly
Hook h
Fig.6
Cassette hanger assembly
1-10 (No.49848)
Cassette catch
Cassette holder assembly
Fig.7
3.2.4 Removing the side bracket assembly
(See Fig.8 to 10)
(1) Remove the screw A attaching the 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 reattach the load rack on
the boss k.
CAUTION:
After reattaching the side bracket assembly, confirm operation.
Side bracket assembly
Joint i
Joint j
A
Side bracket assembly
Fig.8
Side bracket assembly
Joint i
Joint j
Load rack
Load rack
Boss k
Fig.9
Boss k
Fig.10
(No.49848)1-11
3.2.5 Removing the pinch arm (F) assembly
r
(See Fig.11 and 12)
(1) Remove the polywasher and pull out the pinch arm (F) as-
sembly.
(2) Remove the compulsion spring.
3.2.6 Removing the pinch arm (R) assembly
(See Fig.11 and 12)
(1) Remove the polywasher and pull out the pinch arm (R) as-
sembly.
3.2.7 Removing the slide 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 reattach 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.
Joint l
Joint l
Slide chassis assembly
Fig.13
Head
Tape guide
Boss m
Rack link
Hook n
Polywasher
Polywasher
Compulsion
spring
Pinch arm
(R) assembly
Pinch arm
(F) assembly
Fig.11
Pinch arm (F) assembly
Pinch arm
(R) assembly
Polywashe
Fig.14
Polywasher
1-12 (No.49848)
Fig.12
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 head.
(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 reattaching the head, set the wires into the groove
of the tape guide (Fig.16).
3.2.9 Removing 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) Pull out each flywheel assembly downward.
B
Slide chassis assembly
Flywheel assembly (F)
Flywheel assembly (R)
Belt
Fig.17
Polywasher
Polywasher
Head
Head support spring
Tape guide
o
Pinch spring arm
Head
Fig.15
Tape guide
B
Pinch arm spring
Flywheel assembly (F)
Flywheel assembly (R)
Fig.18
o
Slid chassis assembly
Fig.16
(No.49848)1-13
3.2.10 Disassembling the flywheel assembly (F)
r
(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 off.
(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 h older (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) Remove 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 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.
FFC pad
C
Joint
Reel board
C
Fig.21
FFC pad
CT-1 switch
MODE switch
Flywheel
assembly (F)
Joint p
Joints p
Fig.19
Polywasher
Spring holder (R)
Spring holder (F)
TU spring
Friction gear FF
Friction gear play
Polywasher
FF spring
Flywheel
assembly (R)
Joints q
Joint q
Soldering
ST-BY switch
Fig.22
Flywheel assembly (F)
1-14 (No.49848)
Felt
Felt
Flywheel assembly (R)
Fig.20
3.2.13 Removing 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 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.
3.2.14 Removing the FFC pad
(See Fig.25 and 27)
(1) Push each joint hook u of the FFC pad and remove toward
the bottom.
Gear base
link assembly
Gear base spring
Joint t
Gear base arm
Joints s
Hook u
FFC pad
Hook u
Joint t
Fig.23
Gear base arm
Gear base link
assembly
Screwdriver
Fig.24
Gear base arm
FFC pad
Fig.25
(No.49848)1-15
3.2.15 Removing the mode gear
r
r
(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 mode 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 thre e joints x, y
and z at 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
plate 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 the 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).
Direction plate
Direction plate
Joints a'
Joint z
Direction link
Direction plate
Mode switch actuator
Direction link
Fig.26
Slot w
Joint y
Polywasher
Fig.27
Mode rack assembly
Joint b'
Mode gear
Polywashe
Mode rack assembly
Joint x
Joint b'
Joint c'
1-16 (No.49848)
Joints a'
Fig.28
Direction link
Mode switch actuator
Polywasher
v
Mode gea
Direction plate
Mode rack assembly
Fig.29
3.2.19 Removing the gear base assembly / take up gear / reflector gear
r
(See Fig.30 to 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 o f the arrow
to release it from the 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 respectively.
CAUTION:
The reel driver is damaged when remo ved. Please replace with a new one.
Gear base assembly
Pin d'
Polywasher
Slot e'
Slot e'
Fig.30
Take up gear
Reflector gear
Reel driver
Reel driver spring
Reel spindle
Main chassis
Reflector gear
Fig.31
Reel driver
Reel driver spring
Reel spindle
Gear base assembly
Slots e’
Take up gea
Polywasher
Fig.32
(No.49848)1-17
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