JVC KS-FX925R Bedienungsanleitung
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
1-15~26
Area Suffix
EE --------- Russian Federation
T
A
P
E
DAB
EQ
SOUND
VOL VOL
SOURCE
RF
U
D
ATT
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
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
bon both sides of the body and the joint con 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 cusing a
screwdriver, do not damage or break the
board.
CAUTION:
Prior to performing the following procedure, remove
the bottom cover.
Remove the two screws Aattaching the front
chassis.
Remove the two screws B on each side of the body.
Release the two joints dand the two joints eon 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
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 Fattaching 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
DD
D
E
Rear panel
Heat sink
Fig. 6
CC
C
Fig. 8
Main board assembly
CP401
FF
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 Gattaching 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 Hattaching the rear cover
on the back of the front panel assembly.
Unjoint the nine joints fwith 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 Aattaching 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 bin the direction
of the arrow.
1.
2.
Removing the cassette guide (See Fig.3)
Remove the screw Bon 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 das 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
<Cassette mechanism section>
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 jand 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 eon the cassette catch.
1.
2.
Removing the load arm (See Fig.5)
Fig.5
Fig.6
Fig.7
Fig.9
Fi
g
.8
Load arm
E-washer
Joint e
Cassette holder assembly
Cassette holder assembly
Side bracket
Joints f
Cassette holder assembly
Cassette hanger assembl
y
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
assembly Cassette catch
KS-FX925R
1-8
Remove the screw Cattaching the side bracket
assembly.
Detach the front side of the side bracket assembly
upward and pull out forward to release the joint land
min the rear.
1.
2.
Removing the side bracket assembly
(See Fig.10 to 12)
When reassembling, make sure that the
boss nof 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 oand 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 pand hook qof
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)
Belt Polywasher
Polywasher
Flywheel assembly (F)
Flywheel assembly (R)
r
r
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