JVC KS-LH4R Bedienungsanleitung

SERVICE MANUAL

CASSETTE RECEIVER

No.49725

Mar. 2002

KS-LH4R

Contents

Safety precaution

Disassembly method

Adjustment method

Description of major ICs

1- 2

1- 3

1-17

1-20~30

Area Suffix

E ----------- Continental Europe

SOUND

VOL VOL

SOURCE

TAPE

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KS-LH4R

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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KS-LH4R

1-3

Press the release switch and remove the front panel

unit in the direction of the arrow.

Disassembly method

Removing the front panel unit

(See Fig.1)

Remove the two screws Aattaching the front

chassis.

Remove the two screws Bon each side of the body.

Release the two joints aand the two joints bon the

sides. Release the two joints cat the bottom and

remove the front chassis toward the front.

Removing the front chassis

(See Fig.2 to 4)

Remove the four screws C attaching the heat sink

on the left side of the body, and remove the heat

sink.

Removing the heat sink (See Fig.5)

Joint c

Heat sink

Fig.2

Fig.1

Fig. 3

Fig.4

Fig. 5

Front panel unit

Front chassis

Joint a

Joint a Joint b

Joint b

Joint c

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1-4

Prior to performing the following procedure, remove

the front chassis and the heat sink.

Turn the body upside down.

Insert a screwdriver to the two joints d and two joints

eon both sides of the body and the joint f on the

back of the body, then detach the bottom cover from

the body.

Removing the bottom cover (See Fig.6)

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.

Removing the rear panel (See Fig.7 )

Prior to performing the following procedure, remove

the front chassis, the heat sink, bottom cover and the

rear panel.

Remove the two screws F attaching the main

amplifier board assembly on the top cover.

Disconnect connector CP401 on the main amplifier

board assembly from the cassette mechanism

assembly.

Removing the main amplifier board assembly

(See Fig.8)

When disengaging the joint fusing a

screwdriver, do not damage or break the

board.

CAUTION:

Bottom cover

Fig. 6

Fig. 7

Fig. 8

Main board assembly

Joints d

Joints e

Joint f

Rear panel

CP401

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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.

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 gwith the front panel and the

rear cover.

Remove the control switch board on the back of the

front panel.

Cassette mechanism assembly

Top cover

Fig. 9

Fig. 10

Fig. 12

Fig. 11

LCD & Key control board

Joints g

Front panel

Rear cover

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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

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

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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.

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

Load arm

E-washer

Joint e

Cassette holder assembly

Side bracket

Joints f

Cassette holder assembly

Cassette hanger assembl

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

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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.

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

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KS-LH4R

1-9

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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KS-LH4R

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.

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.

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

Slide chassis assembly

Head Tape guide

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)

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