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JVC KS-FX473R User manual

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SERVICE MANUAL
CASSETTE RECEIVER
No.49689
Feb. 2002
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
KS-FX473R/KS-FX470R
KS-FX473R/KS-FX470R
Area Suffix
E
EX
Continental Europe
Central Europe
Contents
Safety precaution
Disassembly method
Adjustment method
Description of major ICs
1- 2
1- 3
1-13
1-16~24
Different pont Illumination
KS-FX473R Amber
KS-FX470R Green
KS-FX473R
KS-FX470R
KS-FX473R
KS-FX470R
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TEL 13942296513 QQ 376315150 892498299
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KS-FX473R/KS-FX470R
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
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TEL 13942296513 QQ 376315150 892498299
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KS-FX473R/KS-FX470R
1-3
Press the eject button in the lower right part of the
front panel. Remove the front panel assembly from
the body.
1.
Removing the front panel assembly
(See Fig.1)
Prior to performing the following procedure, remove
the front panel assembly.
Release the four joint tabs aon both sides of the
front chassis assembly and remove the front chassis
assembly toward the front.
1.
Removing the front chassis assembly
(See Fig.2 and 3)
Disassembly method
<Main body>
Fig.1
Fig.2
Fig.3
Front panel assembly
Eject button
Tab a
Tab a
Front chassis assembly
Front chassis
assembly
Heat sink Tab a
Tab a
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TEL 13942296513 QQ 376315150 892498299
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KS-FX473R/KS-FX470R
1-4
Remove the three screws Aon the left side of the
body.
1.
Removing the heat sink (See Fig.4)
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly
and the heat sink.
Turn over the body and unjoint the five joints bwith
the bottom cover and the body using a screwdriver.
1.
Removing the bottom cover
(See Fig.5 and 6)
Fig.4
Fig.5
Fig.6
Heat sink
AA
Joints b
Joints b
Joint b
Joints b
Joints b
Joint b
Bottom cover
Bottom cover
Rear panel
Rear panel
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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KS-FX473R/KS-FX470R
1-5
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly,
the heat sink and the bottom cover.
Remove the screw B, the two screws C and the two
screws Dattaching the rear bracket on the back of
the body. Remove the rear bracket.
Remove the two screws Eattaching the main board
on the bottom of the body. Disconnect connector
CN901 and CN902 on the main board in the
direction of the arrow.
1.
2.
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, the bottom cover and the main board.
Remove the four screws Fattaching the cassette
mechanism section on the back of the top chassis.
1.
Removing the cassette mechanism section
(See Fig.9)
Fig.7
Fig.8
Fig.9
Rear bracket
B
D
D
C
C
Main board
E
E
CN902
CN901
Cassette mechanism section
F
F
FF
Top chassis
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TEL 13942296513 QQ 376315150 892498299
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KS-FX473R/KS-FX470R
1-6
Prior to performing the following procedure, remove
the cassette mechanism section.
Disconnect the wire from connector CJ901 on the
head amplifier board.
Remove the screw G and slide the head amplifier
board in the direction of the arrow to unjoint the two
joints cwith the mechanism bracket.
1.
2.
Removing the head amplifier board
(See Fig.10)
Prior to performing the following procedure, remove
the cassette mechanism section.
Disconnect the wire from connector CJ902 on the
motor board.
Remove the screw Hand slide the motor board in
the direction of the arrow to unjoint the joint dwith
the mechanism bracket.
1.
2.
Removing the motor board (See Fig.11)
Prior to performing the following procedure, remove
the cassette mechanism section, the head amplifier
board and the motor board.
Remove the four screws Ion the bottom of the
cassette mechanism section.
1.
Removing the cassette mechanism assembly
(See Fig.12)
Fig.10
Fig.11
Fig.12
G
Joint c
Joint c
Head amplifier board
CJ901
Motor board
CJ902
Joint d
H
Mechanism bracket
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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KS-FX473R/KS-FX470R
1-7
Prior to performing the following procedure, remove
the front panel assembly.
Remove the four screws Jattaching the rear cover
on the back of the front panel assembly.
Unjoint the nine joints ewith the front panel and the
rear cover.
Remove the control switch board on the back of the
front panel.
1.
2.
3.
Removing the control switch board
(See Fig.13 to 15)
Fig.13
Fig.14
Fig.15
J
JJ
J
Rear cover
Joints e
Joints e
Front panel
Rear cover
Control switch board
Front panel
Joints e
Joints e
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
KS-FX473R/KS-FX470R
1-8
Prior to performing the following procedures, remove
the head amplifier board, the relay board and the
mechanism bracket.
<Cassette mechanism assembly>
Unsolder the three wires aon the direction switch
board.
Remove the one screw Aattaching the direction
switch board.
1.
2.
Removing the direction switch board
(See Fig.1)
Remove the screw Battaching the FF / REW lever
assembly on the back of the cassette mechanism
assembly.
Remove the screw Con the upper side of the FF /
REW lever assembly.
Lift and pull forward the FF / REW lever assembly to
disengage the joints b, c, dand e.
1.
2.
3.
Removing the FF / REW lever assembly
(See Fig.1)
Reattach the FF / REW lever assembly to the joint c
on the back of the chassis.
Reattach the pinch-roller shaft e, the change lever d
and the return link eto the chassis.
1.
2.
Reattaching the FF / REW lever assembly
(See Fig.1)
C
FF / REW lever assembly
Joint c
Joint b
B
A
Direction switch board
Joint d
Joint e
Soldering a
Fig.1
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
KS-FX473R/KS-FX470R
1-9
Prior to performing the following procedure, remove
the direction switch board and the FF / REW lever
assembly.
Remove the screw Dattaching the playback head.
Remove the C washer and pull out the FF roller.
Remove the S support plate, the A arm spring (a)
and (b), the playback head.
1.
2.
3.
Removing the playback head (See Fig.2)
The A arm spring (a) differs from the A
arm spring (b).
ATTENTION:
Prior to performing the following procedure, remove
the direction switch board and the FF / REW lever
assembly.
Remove the P arm spring (f) in the pinch-roller (F)
assembly from the chassis.
Remove the P arm spring (r) in the pinch-roller (R)
assembly from the chassis.
Draw out the pinch roller (F) and (R) assembly from
the shaft.
1.
2.
3.
Removing the pinch-roller (R) and (F)
assembly (See Fig.2)
The P arm spring (f) differs from the P
arm spring (r).
ATTENTION:
The pinch roller (F) assembly differs
from the pinch roller (R) assembly.
ATTENTION:
A arm spring (b) A arm spring (a)
Pinch-roller (R) assembly Pinch-roller (F) assembly
Shaft Shaft
S support plate
D
C washer
P arm spring (f)
P arm spring (r)
Remove the P arm spring (f)
from the chassis.
Remove the P arm spring (r)
from the chassis.
Playback head
FF roller
Fig.2
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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KS-FX473R/KS-FX470R
1-10
Prior to performing the following procedure, remove
the FF / REW lever assembly.
From the rear of the unit, bend the two tabs f
outwards and disengage the two joints gin the
direction of the arrow.
Push the eject lever and remove the cassette holder
from the playback head. Disengage the two joints h
of the cassette hanger / cassette holder and the eject
lever in the direction of the arrow.
Lift the cassette hanger / cassette holder and disengage
the joint iof the return link and the eject lever.
1.
2.
3.
Removing the cassette hanger / cassette
holder (See Fig.3)
Unsolder the two wires jon the motor assembly.1.
Turn over the cassette mechanism assembly and
remove the main belt and the sub-belt from the
motor pulley.
2.
Remove the two screws Gattaching the motor
assembly.
3.
Removing the motor assembly
(See Fig.5)
To replace the sub-belt, remove the
main belt and the sub-belt from the
motor pulley. Then remove the three
screws Eand one screw F. Replace
with a new sub-belt while lifting the reel
base assembly slightly.
ATTENTION:
Prior to performing the following procedure, remove
the FF / REW lever assembly and the cassette
hanger / cassette holder.
Remove the C washer and pull out reel disc assembly.1.
Removing the reel disc assembly
(See Fig.4)
Replace with a new C washer when
reattaching.
ATTENTION:
The main belt can now be removed.
ATTENTION:
Cassette holder
Cassette hanger
Return link
Joint i
Eject lever
Joint h
Joint h
Joint g
Joint g Tab f
Tab f
Reel disc assembly
Flywheel (BF)
Flywheel (BR)
E
E
E
F
G
G
Main-belt
Reel base assembly
Sub-belt
Motor assembly
Motor pulley
Soldering j
Fig.3
Fig.4
Fig.5
C washer
C washer
Chassis
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com