JVC KS-FX7 Service Manual
SERVICE MANUAL
CASSETTE RECEIVER
KS-FX7
KS-FX7
Contents
LOUD
DISP
SCAN
CD CHANGER CONTROL
Multi
Music
Scan
MO789101112
Area Suffix
UN -------- Asean
Safety precaution
Disassembly method
Adjustment method
Description of major ICs
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
1-2
1-3
1-12
1-16
No.49647
Aug. 2001
KS-FX7
Safety precaution
!
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.
1-2
Disassembly method
<Main body>
Removing the front panel assembly
(See Fig.1)
1.
Press the eject button in the lower right part of the
front panel. Remove the front panel assembly from
the body.
Removing the front chassis assembly
(See Fig.2 and 3)
KS-FX7
Front panel assembly
Eject button
Fig.1
Tab a
Prior to performing the following procedure, remove
the front panel assembly.
1.
Release the four joint tabs a on both sides of the
front chassis assembly and remove the front chassis
assembly toward the front.
Tab a
Front chassis assembly
Heat sink
Fig.2
Tab a
Tab a
Front chassis
assembly
Fig.3
1-3
KS-FX7
Removing the heat sink (See Fig.4)
1.
Remove the three screws A on the left side of the
body.
Removing the bottom cover
(See Fig.5 and 6)
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly
and the heat sink.
1.
Turn over the body and unjoint the five joints b with
the bottom cover and the body using a screwdriver.
Joint b
A
Joints b
Heat sink
Fig.4
Rear panel
A
Bottom cover
Joints b
Bottom cover
Joints b
Fig.5
Joints b
Joint b
Rear panel
Fig.6
1-4
KS-FX7
Removing the main board
(See Fig.7 and 8)
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly,
the heat sink and the bottom cover.
1.
Remove the screw B, the five screws C and the two
screws D attaching the rear bracket on the back of
the body. Remove the rear panel.
(KS-FX601U / KS-FX701U)
1.
Remove the screw B, the four screws C and the two
screws D attaching the rear bracket on the back of
the body. Remove the rear panel. (KS-FX501U)
2.
Remove the two screws E attaching the main board
on the bottom of the body. Disconnect connector
CN701 on the main board in the direction of the
arrow.
D
E
C
Rear panel
Fig.7
Main board
C
B
C
D
E
Removing the cassette mechanism section
(See Fig.9)
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly,
the heat sink, the bottom cover and the main board.
1.
Remove the four screws F attaching the cassette
mechanism section on the back of the top chassis.
Fig.8
Cassette mechanism section
F
F
Fig.9
CN701
F
F
Top chassis
1-5
KS-FX7
Removing the control switch board
(See Fig.10 to 12)
Prior to performing the following procedure, remove
the front panel assembly.
1.
Remove the four screws G attaching the rear cover
on the back of the front panel assembly.
2.
Unjoint the twelve joints c with the front panel and
the rear cover.
3.
Remove the control switch board on the back of the
front panel.
Front panel
G
G
Joint c
Rear cover
Joints c
Fig.10
Joints c
G
G
Joint c
Joint c
Joint c
Rear cover
Joints c
Fig.11
Front panel
Control switch board
Fig.12
1-6
<Removal of the cassette mechanism>
KS-FX7
Cassette mechanism ass’y
Removing the head amplifier P.W.B.
(See Fig.1 and 2)
1.
For the 6pin harness extending from connector
CN402 on the head amplifier P.W.B, disconnect it
from the head relay P.W.B.
2.
Disconnect the card wire from connector CN403 on
the head amplifier P.W.B.
3.
Remove the screw A attaching the head amplifier
P.W.B.
4.
Move the tab a as shown in Fig.2 and remove the
head amplifier P.W.B. while moving it in the direction
of the arrow.
Removing the cassette mechanism
assembly (See Fig.1 to 3)
1.
Disconnect the 6pin harness from connector CN402
and the card wire from CN403 on the head amplifier
P.W.B. (Refer to Fig.1 and 2).
Head relay
P.W.B.
6pin
harness
CN403
CN402
CN402
CN403
Head amplifier P.W.B.
A
Head amplifier P.W.B.
Fig.1
Tab a
Fig.2
2.
Remove the four screws B on the bottom of the
cassette mechanism.
B
Head amplifier P.W.B.
Cassette mechanism ass’y
B
Fig.3
1-7
KS-FX7
Removing the head relay P.W.B.
(See Fig.4)
1.
Unsolder the soldering b on the head relay P.W.B.
2.
Remove the screw C attaching the head relay P.W.B.
3.
Remove the head relay P.W.B. in the direction of the
arrow while releasing the two joints c.
Removing the load arm (See Fig.5)
1.
Remove the E washer attaching the load arm using
a pincette or something like that and remove the
spring d.
2.
Move the part of the load arm marked upwards to
release it from the axis of rotation. Then rotate the
load arm in the direction of the arrow to remove it
from the cach.
Fig.4
Cach
Load arm
Fig.5
Head relay P.W.B.
Soldering b
C
E washer
Joint c
Spring d
Removing the sub chassis (See Fig.6)
Prior to performing the following procedure, remove
the head relay P.W.B.
1.
Remove the screw D attaching the sub chassis.
2.
Push the tab e in the direction of the arrow to detach
the one side of the sub chassis. Then release the
sub chassis from the tab f.
Removing the cassette holder and the
holder arm in the eject mode
(See Fig.7 and 8)
Prior to performing the following procedure, remove
the head relay P.W.B., the load arm and the sub
chassis.
1.
Remove the screw E attaching the reinforce bracket.
2.
Remove the reinforce bracket.
Tab f
Sub chassis
Head relay
P.W.B.
D
Cassette mecha chassis
Cassette holder
Fig.6
Head relay P.W.B.
Tab e
Reinforce bracket
E
Reinforce
bracket
tab g
3.
Push the tab g fixing the cassette holder in the
direction of the arrow and open the cassette holder
and the holder arm upward until they stop at an
angle of 45 degrees. Move the two joints h to the
side and remove the cassette holder and the holder
arm from the shaft.
1-8
Joint h
Load arm
Holder arm
Fig.7
Joint h
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