JVC KS-FX772R User manual

SERVICE MANUAL
CASSETTE RECEIVER
No.49694
Mar. 2002
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
KS-FX772R
KS-FX772R
CD CHANGER CONTROL
SEL
TP/PTY
DISP
SSM
¢
4
FM/AM
T A P E
CD-
CH
DAB
SCM
MODE
78910 11 12
RND
RPT
MO
KS-FX772R
Area Suffix
E Continental Europe
Contents
Safety precaution
Disassembly method
Adjustment method
Description of major ICs
1-2
1-3
1-18
1-22

1-3
KS-FX772R
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 joints 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 , 3)
Disassembly method
<Main body>
Fig.1
Fig.2
Fig.3
Front panel assembly
Eject button
Joint a
Joint a
Front chassis assembly
Front chassis
assembly
Heat sink Joint a
Joint a

1-4
KS-FX772R
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 , 6)
Fig.4
Fig.5
Fig.6
Heat sink
AA
Joint b
Joint b
Joint b
Joint b
Joint b
Joint b
Bottom cover
Bottom cover
Rear panel
Rear panel

1-5
KS-FX772R
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 three screws C and the
two screws Dattaching the rear bracket on the back
of the body. Remove the rear panel.
Remove the two screws Eattaching the main board
on the bottom of the body. Disconnect connector
CN701 on the main board in the direction of the
arrow.
1.
2.
Removing the main board (See Fig.7 , 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 panel
B
D
D
C
C
Main board
E
E
CN701
Cassette mechanism section
F
F
F
F
Top chassis

1-6
KS-FX772R
Prior to performing the following procedure, remove
the front panel assembly.
Remove the four screws Gattaching the rear cover
on the back of the front panel assembly.
Unjoint the eleven joints cwith 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.10 ~ 12)
Fig.10
Fig.11
Fig.12
G
GG
G
Rear cover
Joint c
Joint c Joint c
Joint c
Front panel
Rear cover
Front panel
Control switch board

1-7
KS-FX772R
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 ain the direction
of the arrow.
1.
2.
Removing the cassette guide (See Fig.2)
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:
Remove the E-washer attaching the load arm.
Move the load arm in the direction of the arrow and
release the joint bon the cassette catch.
1.
2.
Removing the load arm (See Fig.3)
Fig.1
Fig.2
Mode gear
Cassette guide
Tab a
Tab a
Fig.3
Load arm
E-washer
Joint b

1-8
KS-FX772R
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.
Move the rear part of the cassette hanger assembly
in the direction of the arrow to release it from the two
joint bosses d.
Release the holder stabilizer spring from the hooks e
and f, then pull out from the cassette hanger
assembly.
Bring up the rear side of the cassette hanger
assembly to release the joint g and h.
Pull out the cassette catch from the cassette hanger
assembly.
1.
2.
3.
4.
5.
Removing the cassette hanger assembly /
cassette holder (See Fig.4 to 7)
Fig.4
Fig.5
Fig.7
Fig.6
Cassette holder assembly
Cassette holder assembly
Side bracket
Joints c
Cassette holder assembly
Cassette hanger assembly
Cassette hanger assembly
Cassette hanger
assembly
Boss d
Boss d
Cassette hanger assembly
Cassette stabilizer spring
Hook f
Hook h
Hook e
Hook g
Cassette holder
assembly Cassette catch

1-9
KS-FX772R
Remove the screw Aattaching the side bracket
assembly.
Detach the front side of the side bracket assembly
upward and pull out forward to release the joint iand
jin the rear.
1.
2.
Removing the side bracket assembly
(See Fig.8 to 10)
When reassembling, make sure that the
boss kof 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.
CAUTION:
Fig.9
Fig.10
Fig.8
A
Side bracket assembly
Side bracket assembly
Joint i
Joint j
Side bracket assembly
Boss k
Load rack
Boss k
Load rack
Joint i
Joint j

1-10
KS-FX772R
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.11 and 12)
Remove the polywasher and pull out the pinch arm
(R) assembly.
1.
Removing the pinch arm (R) assembly
(See Fig.11 and 13)
Move the slide chassis assembly in the direction of
the arrow to release the two joints land remove from
the main chassis.
Remove the rack link.
1.
2.
Removing the slide chassis assembly
(See Fig.14 and 15)
When reassembling, first reattach the rack
link, and next fit the boss mand hook nof
the slide chassis assembly to the hole of
the main chassis, and engage the two joints
l.
CAUTION:
It is not necessary to remove the head
and the tape guide.
REFERENCE:
Fig.11
Fig.15
Fig.12
Fig.13
Fig.14
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 l
Joint l
Boss m
Hook n
Rack link
Head
Tape guide

1-11
KS-FX772R
Remove the band attaching the wire to the head.
Remove the two screws B, 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.16 and 17)
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.18 and 19)
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).
CAUTION:
It is not necessary to remove the slide
chassis assembly.
REFERENCE:
It is not necessary to remove the slide
chassis assembly.
REFERENCE:
Fig.17
Fig.19
Fig.16
Fig.18
B
Slide chassis assembly
Head Tape guide
B
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)
o
o