Jvc Ks-fx555 User manual

SERVICE MANUAL

2004/8

CASSETTE RECEIVER

MA10420048

KS-FX555

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

Area suffix

UN ----------------------------- Asean

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

1-2 (No.MA104)

SPECIFICATION

Design and specifications are subject to change without notice.

AUDIO AMPLIFIER SECTION

Maximum Power Output Front 45 W per channel

Rear 45 W per channel

Continuous Power Output (RMS) Front 17 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 0.8%

total harmonic distortion.

Rear 17 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 0.8%

total harmonic distortion.

Load Impedance 4 Ω(4 Ωto 8 Ωallowance)

Tone Control Range Bass ±10 dB at 100 Hz

Treble ±10 dB at 10 kHz

Frequency Response 40 Hz to 20 000 Hz

Line-Out Level/Impedance 2.0 V/20 kΩload (250 nWb/m)

TUNER SECTION

Frequency Range FM 87.5 MHz to 108.0 MHz

AM 531 kHz to 1 602 kHz

[FM Tuner] Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

Stereo Separation 30 dB

[AM Tuner] Sensitivity 20 µV

Selectivity 35 dB

CASSETTE DECK SECTION

Wow & Flutter 0.11% (WRMS)

Frequency Response 30 Hz to 16 000 Hz (Normal tape)

GENERAL

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)

Grounding System Negative ground

Allowable Operating Temperature 0ºC to +40ºC

Dimensions (W ×H ×D) Installation Size (approx.) 178 mm ×50 mm ×150 mm

Panel Size (approx.) 170 mm ×46 mm ×19 mm

Mass (approx.) 1.3 kg (excluding accessories)

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

(No.MA104)1-3

SECTION 1

PRECAUTION

1.1 Safety Precautions

!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.

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

1-4 (No.MA104)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

(No.MA104)1-5

SECTION 3

DISASSEMBLY

3.1 Main body

3.1.1 Removing the front panel assembly

(See Fig.1)

(1) Press the release button and remove the front panel as-

sembly.

Fig.1

3.1.2 Removing the bottom cover

(See Fig.2)

• Prior to performing the following procedure, remove the front

panel assembly.

(1) Turn the body upside down.

(2) Insert a screwdriver under the joints to release the two

joints aon the left side, the two joints bon the right side and

the joint con the back of the body, then remove the bottom

cover from the body.

CAUTION:

When releasing the joint cusing a screwdriver, do not damage

the main board.

Fig.2

3.1.3 Removing the front chassis

(See Fig.3)

• Prior to performing the following procedure, remove the front

panel assembly and bottom cover.

(1) Remove the screw Aon each side of the body.

(2) Release the two joints dand the two joints eon the sides,

then remove the front chassis toward the front.

Fig.3

Front panel assembly

Release button

Bottom cover

Joint b

Joint c

Joint a

Joint d

Front chassis assembly

A

Joint e

Joint dJoint e

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

1-6 (No.MA104)

3.1.4 Removing the heat sink

(See Fig.4)

• Prior to performing the following procedure, remove the front

panel assembly.

(1) Remove the screw Band two screws Cattaching the heat

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

Fig.4

3.1.5 Removing the rear panel

(See Fig.5 )

• Prior to performing the following procedure, remove the front

panel assembly and bottom cover.

(1) Remove the two screws D, three screws Eand three

screws Fattaching the rear panel on the back of the body.

Fig.5

3.1.6 Removing the main board

(See Fig.6)

• Prior to performing the following procedure, remove the front

panel assembly, bottom cover, front chassis, heat sink and

rear panel.

(1) Remove the two screws Gattaching the main board on the

top chassis.

(2) Disconnect the connectors CP701 on the main board from

the cassette mechanism assembly.

Fig.6

3.1.7 Removing the cassette mechanism assembly

(See Fig.7)

• Prior to performing the following procedure, remove the front

panel assembly, bottom cover, front chassis, heat sink, rear

panel and main board.

(1) Remove the four screws Hattaching the cassette mecha-

nism assembly from the top chassis.

Fig.7

Heat sink

C

B

C

ED

EFF

DRear panel

G

Main board

CP701

G

HH

Top chassis

Cassette mechanism assembly

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

(No.MA104)1-7

3.1.8 Removing the mecha board

(See Fig.8)

• Prior to performing the following procedure, remove the front

panel assembly, bottom cover, front chassis, heat sink, rear

panel, main board and cassette mechanism assembly.

(1) Disconnect the wire from the connectors CN402 and

CN403 on the mecha board.

(2) Remove the screw Jattaching the mecha board.

Fig.8

3.1.9 Removing the front board

(See Figs.9 to 11)

• Prior to performing the following procedure, remove the front

panel assembly.

(1) Remove the four screws Kattaching the rear cover on the

back of the front panel assembly. (See fig.9)

(2) Release the eleven joints f, the front panel and the rear

cover become separate. (See fig.10)

(3) Remove the front board from the front panel assembly.

(See fig.11)

Caution:

Take care not to lose the springs. Fig.9

Fig.10

Fig.11

J

CN402

CN401 CN403

K

K K

K

Joint f

Joint

f

Joint f

Front panel assembly

Rear cover

LCD & Key control board

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

1-8 (No.MA104)

3.2 Cassette mechanism assembly

REFERENCE:

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).

Fig.1

3.2.1 Removing the cassette guide

(See Fig.2)

(1) Turn the mode gear to set to RVS play or subsequent

mode.

(2) Remove the cassette guide from the main chassis while re-

leasing each two joint tabs ain the direction of the arrow.

Fig.2

3.2.2 Removing the load arm

(See Fig.3)

(1) Remove the E-washer attaching the load arm.

(2) Move the load arm in the direction of the arrow and release

the joint bon the cassette catch.

Fig.3

Mode gea

r

Cassette guide

Tab a

Load arm

E-washer

Joint b

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

(No.MA104)1-9

3.2.3 Removing the cassette hanger assembly / cassette holder

(See Fig.4 to 7)

(1) Check the mode is set to EJECT. Push down the front part

of the cassette holder and move in the direction of the ar-

row to release the joint c.

(2) Move the rear part of the cassette hanger assembly in the

direction of the arrow to release it from the two joint bosses

d.

(3) Release the holder stabilizer spring from the hooks eand

f, then pull out from the cassette hanger assembly.

(4) Bring up the rear side of the cassette hanger assembly to

release the joint gand h.

(5) Pull out the cassette catch from the cassette hanger as-

sembly.

Fig.4

Fig.5

Fig.6

Fig.7

Cassette holder assembly

Side bracket

Joints c

Cassette holder assembly

Cassette hanger

assembly

Boss d

Cassette hange

r

assembly

Cassette stabilizer spring

Hook f

Hook e

Cassette hanger

assembly

Hook h

Hook g

Cassette holder

assembly

Cassette holder assembly

Cassette hanger assembly

Cassette catch

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

1-10 (No.MA104)

3.2.4 Removing the side bracket assembly

(See Fig.8 to 10)

(1) Remove the screw Aattaching the side bracket assembly.

(2) Detach the front side of the side bracket assembly upward

and pull out forward to release the joint iand jin the rear.

CAUTION:

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 op-

eration.

Fig.8

Fig.9

Fig.10

A

Side bracket assembly

Joint i

Joint j

Joint i

Joint j

Side bracket assembly

Boss k

Load rack

Boss k

Load rack

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

(No.MA104)1-11

3.2.5 Removing the pinch arm (F) assembly

(See Fig.11 and 12)

(1) Remove the polywasher and pull out the pinch arm (F) as-

sembly.

(2) Remove the compulsion spring.

3.2.6 Removing the pinch arm (R) assembly

(See Fig.11 and 12)

(1) Remove the polywasher and pull out the pinch arm (R) as-

sembly.

3.2.7 Removing the slide chassis assembly

(See Fig.13 and 14)

REFERENCE:

It is not necessary to remove the head and the tape guide.

(1) Move the slide chassis assembly in the direction of the ar-

row to release the two joints land remove from the main

chassis.

(2) Remove the rack link.

CAUTION:

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.

Fig.11

Fig.12

Fig.13

Fig.14

Polywashe

r

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

Boss m

Hook n

Rack link

Head

Tape guide

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

1-12 (No.MA104)

3.2.8 Removing the head / tape guide

(See Fig.16 and 17)

REFERENCE:

It is not necessary to remove the slide chassis assembly.

(1) Remove the band attaching the wire to the head.

(2) Remove the two screws B, the head and the head support

spring.

(3) Remove the pinch arm spring from the tape guide.

(4) Remove the tape guide and the pinch spring arm.

CAUTION:

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).

3.2.9 Removing the flywheel assembly (F) & (R)

(See Fig.18 and 19)

REFERENCE:

It is not necessary to remove the slide chassis assembly.

(1) Remove the belt at the bottom.

(2) Remove the two polywashers on the upper side.

(3) Pull out each flywheel assembly downward.

Fig.15

Fig.16

Fig.17

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

o

Flywheel assembly (F)

Flywheel assembly (R)

Belt

Polywasher

Flywheel assembly (F)

Flywheel assembly (R)

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

(No.MA104)1-13

3.2.10 Disassembling the flywheel assembly (F)

(See Fig.19 and 20)

(1) Push and turn counterclockwise the spring holder (F) to re-

lease the three joints pon the bottom of the flywheel.

(2) The spring holder (F), the TU spring and the friction gear

play come off.

(3) Remove the polywasher and felt.

3.2.11 Disassembling the flywheel assembly (R)

(See Fig.19 and 20)

(1) Push and turn clockwise the spring holder (R) to release

the three joints qon the bottom of the flywheel.

(2) The spring holder (R), the FF spring and the friction gear

FF come off.

(3) Remove the polywasher and the felt.

3.2.12 Removing the reel board

(See Fig.21 and 22)

(1) Remove the two screws Cattaching the reel board.

(2) Move the reel board in the direction of the arrow to release

the joint r.

(3) Unsolder the wires if necessary.

CAUTION:

When reattaching, confirm operation of the MODE

switch and the ST-BY switch.The mode position be-

tween EJECT and ST-BY is optimum for reattach-

ing.Connect the card wire extending from the reel board

to the FFC pad before reattaching the reel board.

Fig.19

Fig.20

Fig.21

Fig.22

Flywheel

assembly (F) Flywheel

assembly (R)

Joints p

Joint p

Joints q

Joint q

Polywasher

Spring holder (F)

TU spring

Polywasher

Spring holder (R)

FF spring

Friction gear play

Friction gear FF

Flywheel assembly (F)

Flywheel assembly (R)

Felt Felt

FFC pad

Joint

r

Reel board

C

FFC pad

CT-1 switch

ST-BY switch

Soldering

MODE switch

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

1-14 (No.MA104)

3.2.13 Removing the gear base arm / gear base link assembly

(See Fig.23 to 25)

(1) Move the gear base arm in the direction of the arrow.

(2) Insert a slotted screwdriver to the gear base spring under

the gear base arm, and release the gear base arm upward

from the boss on the gear base assembly.

(3) Remove the gear base arm from the main chassis while re-

leasing the two joints s.

(4) Move the gear base link assemby in the direction of the ar-

row to release the two joints t.

REFERENCE:

When reattaching the gear base arm, make sure that the

boss on the gear base assembly is inside the gear base

spring.

3.2.14 Removing the FFC pad

(See Fig.25 and 27)

(1) Push each joint hook uof the FFC pad and remove toward

the bottom.

Fig.23

Fig.24

Fig.25

Gear base

link assembly

Gear base arm

FFC pad

Joint t

Joints s

Hook u

Gear base arm

Screwdriver

Gear base spring

FFC pad

Gear base link

assembly Gear base arm

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

(No.MA104)1-15

3.2.15 Removing the mode gear

(See Fig.26 and 29)

(1) Remove the polywasher on the bottom and pull out the

mode gear.

3.2.16 Removing the mode switch actuator

(See Fig.26, 27 and 29)

(1) Pull out the mode switch actuator at the bottom.

REFERENCE:

When reattaching the mode switch actuator to the main

chassis, make sure to set on the shaft and insert vinto

the slot w.

3.2.17 Removing the direction link / direction plate

(See Fig.27 to 29)

(1) Remove the polywasher attaching the direction link.

(2) Bring up the direction link to release the three joints x, y

and zat a time.

(3) Move the direction plate in the direction of the arrow to re-

lease the two joints a’.

REFERENCE:

When reattaching the direction plate, engage the two

joints a’ and move in the direction of the arrow (Refer to

Fig.28).

REFERENCE:

When reattaching the direction link, move the direction

plate in the direction of the arrow and engage the three

joint x, yand zat a time (Refer to Fig.29).

3.2.18 Removing the mode rack assembly

(See Fig.27 and 28)

(1) Move the mode rack assembly in the direction of the arrow

to release the two joints b’ and the joint c’.

REFERENCE:

When reattaching, set the two b’ on the bottom of the

mode rack assembly into the slots of the main chassis

and move in the direction of the arrow (See Fig.28).

Fig.26

Fig.27

Fig.28

Fig.29

Polywashe

r

Mode switch actuator Mode gear

Direction plate Direction link

Mode rack assembly

Slot w

Direction plate

Joints a'

Joint z

Direction link Polywasher

Joint y

Joint x

Direction plate Mode rack assembly

Joint c'

Joint b'

Joints a'

Polywasher

Mode gea

r

Mode switch actuator

Direction link

Direction plate

Mode rack assembly

v

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

1-16 (No.MA104)

3.2.19 Removing the gear base assembly / take up gear / reflector gear

(See Fig.30 to 32)

(1) Push in the pin d’ of the gear base assembly on the upper

side of the body and move the reflector gear toward the

bottom, then pull out.

(2) Remove the polywasher on the bottom and pull out the

take up gear.

(3) Move the gear base assembly in the direction of the arrow

to release it from the two slots e’ of the main chassis.

REFERENCE:

The parts are damaged when removed. Please replace

with new ones.

3.2.20 Removing the reel driver / reel spindle

(See Fig.32)

(1) Draw out the reel driver from the shaft on the main chassis

and remove the reel driver spring and the reel spindle re-

spectively.

CAUTION:

The reel driver is damaged when removed. Please re-

place with a new one.

Fig.30

Fig.31

Fig.32

Gear base assembly

Pin d'

Slot e'

Polywasher

Reflector gear

Take up gear

Reel driver spring

Reel driver

Reel spindle

Gear base assembly

Slots e’

Main chassis

Reflector gear Polywasher

Take up gea

r

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

(No.MA104)1-17

3.2.21 Removing the side bracket assembly

(See Fig.33 to 37)

(1) Remove the eject cam plate spring.

(2) Push the joint f’ through the slot to remove the load rack

downward.

(3) Move the eject cam limiter in the direction of the arrow to

release it from the boss g’ of the side bracket assembly and

from the two joints h’.

(4) Move the eject cam plate in the direction of the arrow to re-

lease the joint i’.

CAUTION:

When reassembling, confirm operation of each part be-

fore reattaching the eject cam plate spring.

Fig.33

Fig.34

Fig.35

Fig.36

Fig.37

Joint f'

Load rack

Eject cam plate spring

Eject cam limiter

Side bracket assembly

Boss g'

Joint h'

Load rack

Joint f'

Joint h'

Boss g'

Eject cam limiter

Side bracket

assembly

Joint h'

Eject cam plate

Side bracket assembly

Boss g'

Joint i'

Eject cam plate

Side bracket assembly

Eject cam plate

Joint i'

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

1-18 (No.MA104)

3.2.22 Removing the main motor assembly / sub motor assembly

(See Fig.38 to 40)

(1) Remove the belt at the bottom.

(2) Remove the polywasher and pull out the mode gear.

(3) Pull out the reduction gear (B).

(4) Remove the polywasher and pull out the reduction gear

(A).

(5) Remove the two screws attaching the main motor assem-

bly.

(6) Remove the two screws Eattaching the sub motor assem-

bly.

(7) Unsolder the wires on the reel board if necessary.

CAUTION:

When reassembling, adjust the length of the wires ex-

tending from the sub motor asswmbly by attaching them

to the side of the sub motor assembly with the wires ex-

tending from the main motor assembly using a spacer.

Fig.38

Fig.39

Fig.40

Belt

Polywasher

Polywashe

r

Mode gear

Reduction

gear (A)

Main motor

assembly

D

Sub moto

r

assembly

E

Reduction gear (B)

Polywasher

Reduction gear (B)

Reduction gear (A)

ED

Main motor assembly

Sub motor assembly

Spacer

Space

r

Sub motor assembly

Main motor assembly

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

(No.MA104)1-19

SECTION 4

ADJUSTMENT

4.1 Adjustment method

Test instruments required for adjustment

(1) Digital oscilloscope (100MHz)

(2) Frequency counter meter

(3) Electric voltmeter

(4) Wow & flutter meter

(5) Test tapes

• VT724...........................For DOLBY level measurement

• VT739..............For playback frequency measurement

• VT712....For wow flutter & tape speed measurement

• VT703........................For head azimuth measurement

(6) Torque gauge............................Cassette type for CTG-N

Standard volume position

Balance and Bass, Treble volume, Fader : Center (Indication "0")

Loudness, Dolby NR, Sound, Cruise : Off

Volume position is about 2V at speaker output with following

conditions, Playback the test tape VT721.

Measuring conditions (Amplifier section)

AM mode 999kHz/62dB, INT/400Hz, 30%

modulation signal on receiving.

FM mono mode 97.9MHz/66dB, INT/400Hz, 22.5kHz

deviation pilot off mono

FM stereo mode 1kHz, 67.5kHz dev. pilot 7.5kHz dev.

Output level 0dB (1µV,50Ω/open terminal)

Power supply voltage: DC14.4V (11V to 16V)

Load impedance: 4Ω(4Ωto 8Ωallowance)

Line out level/Impedance: 2.0V/20kΩload (250 nWb/m)

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

1-20 (No.MA104)

Information for using a car audio service jig

(1) We're advancing efforts to make our extension cords common for all car audio products.

Please use this type of extension cord as follows.

(2) As a U-shape type top cover is employed, this type of extension cord is needed to check operation of the mechanism assembly

after disassembly.

(3) Extension cord : EXTKSRT002-18P ( 18 pin extension cord ) For connection between mechanism assemblyand main board.

(4) Check for mechanism driving section such as motor ,etc.

Disassembly method

(1) Remove the front panel assembly.

(2) Remove the bottom cover.

(3) Remove the front chassis.

(4) Remove the rear panel

(5) Remove the heat sink.

(6) Remove the main board.

(7) Reattach the heat sink with the two screws B. (Refer to DISASSEMBLY.)

(8) Install the front chassis and front panel assembly.

(9) Confirm that current is being carried by connecting an extension cord jig.

NOTE:

Available to connect to the CJ701 connector when installing the front panel.

CAUTION :

Be sure to attach the heat sink and rear panel on the power amplifier IC and regulator IC of a main board when supplying

the power.If voltage is applied without attaching those parts, the power amplifier IC and regulator IC will be destroyed

by heat.

Front panel assembly

Extension cord

EXTKSRT002-18P

Main board

Cassette mechanism

EXTKSRT002-18P

To

Main board

To

Cassette mechanism

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

JVC KS-FX555 User manual

Popular Stereo Receiver manuals by other brands