JVC KS-FX725R Bedienungsanleitung

SERVICE MANUAL

CASSETTE RECEIVER

No.49721

Mar. 2002

KS-FX725R

Area Suffix

EE ---- Russian Federation

Contents

Safety precaution

Disassembly method

Adjustment method

Description of major ICs

1-2

1-3

1-18

1-22

RDS

PTY

DISP

8 9 10 11 127

DAB

1-2

KS-FX725R

!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

1-3

KS-FX725R

Press the eject button in the lower right part of the

front panel. Remove the front panel assembly from

the body.

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.

Removing the front chassis assembly

(See Fig.2 , 3)

Disassembly method

Fig.1

Fig.2

Fig.3

Front panel assembly

Eject button

Joint

Front chassis assembly

Front chassis

assembly

Heat sink

Joint

1-4

KS-FX725R

Remove the three screws Aon the left side of the

body.

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.

Removing the bottom cover

(See Fig.5 , 6)

When disengaging the joint cusing a

screwdriver, do not damage or break the

board.

CAUTION:

Fig.4

Fig.5

Fig.6

Heat sink

Joint b

Joint c

Joint b

Joint c

Bottom cover

Rear panel

1-5

KS-FX725R

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

CP401 on the main board in the direction of the

arrow.

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.

Removing the cassette mechanism section

(See Fig.9)

Fig.7

Fig.8

Fig.9

Rear panel

Main board

CP401

Cassette mechanism section

Top chassis

1-6

KS-FX725R

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 ten joints dwith the front panel and the

rear cover.

Remove the control switch board on the back of the

front panel.

Removing the control switch board

(See Fig.10 ~ 12)

Fig.10

Fig.11

Fig.12

G G

Rear cover

Joint d

Joint d Joint d

Joint d

Front panel

Rear cover

Front panel

Control switch board

1-7

KS-FX725R

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

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.

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.

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

Joint a

Cassette guide

Tab b

Head board

notch d

Soldering

1-8

KS-FX725R

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.

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.

Removing the load arm (See Fig.5)

Fig.5

Fig.6

Fig.7

Fig.9

Fig.8

Load arm

E-washer

Joint e

Cassette holder assembly

Side bracket

Joints f

Cassette holder assembly

Cassette hanger assembly

Cassette hanger

assembly

Boss g

Cassette hanger assembly

Cassette stabilizer spring

Hook i

Hook k

Hook h

Hook j

Cassette holder

assembly Cassette catch

1-9

KS-FX725R

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.

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

Side bracket assembly

Joint l

Joint m

Side bracket assembly

Boss n

Load rack

Boss n

Load rack

Joint l

Joint m

1-10

KS-FX725R

Remove the polywasher and pull out the pinch arm

(F) assembly.

Remove the compulsion spring.

Removing the pinch arm (F) assembly

(See Fig.13 and 14)

Remove the polywasher and pull out the pinch arm

(R) assembly.

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.

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

Boss p

Hook q

Rack link

Head

Tape guide

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