JVC KS-FX270 Bedienungsanleitung

SERVICE MANUAL

CASSETTE RECEIVER

No.49582

Dec. 2000

KS-FX270

Area Suffix

J ---- Northern America

Contents

Safety precaution

Disassembly method

Adjustment method

Description of major ICs

1-2

1-3

1-12

1-16

This service manual is printed on 100% recycled paper.

Scan

Music

Multi

DISPDISP

SCANSCAN

LOUDLOUD

8 9 10 11 127

VCR

KS-FX270

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

KS-FX270

1-3

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 joint tabs 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 and 3)

Disassembly method

Fig.1

Fig.2

Fig.3

Front panel assembly

Eject button

Tab a

Front chassis assembly

Front chassis

assembly

Heat sink Tab a

Tab a

KS-FX270

1-4

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 and 6)

Fig.4

Fig.5

Fig.6

Heat sink

Joints b

Joint b

Joints b

Joint b

Bottom cover

Rear panel

KS-FX270

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 four 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.

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.

Removing the cassette mechanism section

(See Fig.9)

Fig.7

Fig.8

Fig.9

Rear panel

Main board

CN901

Cassette mechanism section

Top chassis

KS-FX270

1-6

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 six joints cwith 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 to 12)

Fig.10

Fig.11

Fig.12

Rear cover

Joints c

Front panel

Rear cover

Front panel

Control switch board

KS-FX270

1-7

For the 6pin harness extending from connector

CN402 on the head amplifier P.W.B, disconnect it

from the head relay P.W.B.

Disconnect the card wire from connector CN403 on

the head amplifier P.W.B.

Remove the screw A attaching the head amplifier

P. W. B .

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 head amplifier P.W.B.

(See Fig.1 and 2)

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).

Remove the four screws B on the bottom of the

cassette mechanism.

Removing the cassette mechanism

assembly (See Fig.1 to 3)

Fig.1

Cassette mechanism ass’y

Head relay

P.W.B.

6pin

harness

CN402 CN403

CN402

Head amplifier P.W.B.

Fig.2

Tab a

Head amplifier P.W.B.

Fig.3

Cassette mechanism ass’y

Head amplifier P.W.B.

CN403

KS-FX270

1-8

Unsolder the soldering b on the head relay P.W.B.

Remove the screw C attaching the head relay P.W.B.

Remove the head relay P.W.B. in the direction of the

arrow while releasing the two joints c.

Removing the head relay P.W.B.

(See Fig.4)

Remove the E washer attaching the load arm using

a pincette or something like that and remove the

spring d.

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.

Removing the load arm (See Fig.5)

Prior to performing the following procedure, remove

the head relay P.W.B.

Remove the screw D attaching the sub chassis.

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 sub chassis (See Fig.6)

Prior to performing the following procedure, remove

the head relay P.W.B., the load arm and the sub

chassis.

Remove the screw E attaching the reinforce bracket.

Remove the reinforce bracket.

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.

Removing the cassette holder and the

holder arm in the eject mode

(See Fig.7 and 8)

Fig.4 CSoldering b Joint c

Fig.6

Tab f

Tab e

Cach

Head relay P.W.B.

Fig.7

Reinforce bracket

Reinforce

bracket

Cassette holder

Sub chassis

Head relay

P.W.B.

Joint h

Holder arm

Load arm

Joint h

tab g

Fig.5

Spring d

Load arm E washer

Cassette mecha chassis

KS-FX270

1-9

Prior to performing the following procedure, remove

the head relay P.W.B.and the sub chassis.

Remove the two screws F attaching the play head

(The spring under the play head comes off at the

same time).

Removing the play head (See Fig.9)

Prior to performing the following procedure, remove

the head relay P.W.B.and the sub chassis.

Push each tab i in the direction of the arrow and pull

out the pinch rollers on both sides.

Removing the pinch roller ass’y

(See Fig.9)

Unsolder the soldering j on the reel disc P.W.B.

Push the seven tabs k on the bottom of the cassette

mechanism assembly in the direction of the arrow.

Removing the reel disc P.W.B.

(See Fig.10)

Unsolder the two soldering l of the motor and the sub

motor.

Release the sub motor from the three tabs m. Push

the sub motor upward and pull out it.

Remove the belt on the bottom of the cassette

mechanism assembly and remove the two screws G

attaching the motor.

Removing the motor and the sub motor

(See Fig.10 and 11)

The motors can be detached before

removing the load arm.

ATTENTION:

Fig.8

Cassette holder

and holder arm

Joint h

Shaft

Joint h

Fig.9

Tab i

Pinch roller ass’yPinch roller ass’y

Play head

Spring

Fig.11

Sub motor

Tab m

Load arm

Motor

Soldering l

Tab m

Soldering l

Tab m

Soldering j

Pinch roller ass’y

Tab i Tab i

Tab i

Fig.10

Cassette mechanism ass’y

Tabs k

Reel disc P.W.B.

Soldering j

Tabs k

Motor Belt

Flyhwheel

KS-FX270

1-10

Prior to performing the following procedure, remove

the head relay P.W.B, the load arm, the sub chassis,

the cassette holder, the holder arm and the reel disc

P. W. B .

Remove the belt on the bottom of the cassette

mechanism ass’y.

Remove the slit washer attaching the flywheel on the

upper side of the cassette mechanism ass’y and pull

out the flywheel downward. Then remove another

flywheel in the same way.

Removing the flywheel

(See Fig.10 and 12)

Prior to performing the following procedure, remove

the head relay P.W.B, the load arm, the sub chassis,

the cassette holder and the holder arm.

Disengage the part n inside of the reel driver which

engages with the shaft, using a pincette or

something like that. Then remove the reel driver from

the shaft.

Remove the reel driver spring and the reel table.

Removing the reel disc ass’y( )

(See Fig.12 to 14)

When reassembling, make sure to use

a new slit washer.

ATTENTION:

Fig.10

Cassette mechanism ass’y

Tab k

Reel disc P.W.B.

Soldering j

Tab k

Motor Belt

Flyhwheel

Fig.12

Plate

The part n

Reel driver

Reel disc ass’y( )

Push aside

the gear

Tabs o

Reel disc

ass’y( )

The part n

Reel driver

Tab o

Fig.13

Reel driver

Shaft

The part n

Fig.14

Reel driver spring

Reel table

Slit washer

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