Jvc Ks-fx7 User manual

SERVICE MANUAL

CASSETTE RECEIVER

No.49647

Aug. 2001

KS-FX7

Area Suffix

UN -------- Asean

Contents

Safety precaution

Disassembly method

Adjustment method

Description of major ICs

1-2

1-3

1-12

1-16

LOUD

DISP

SCAN

Multi

Music

Scan

MO789101112

CD CHANGER CONTROL

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KS-FX7

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-FX7

1-3

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 joint tabs 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 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

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KS-FX7

1-4

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 and 6)

Fig.4

Fig.5

Fig.6

Heat sink

AA

Joints b

Joint b

Joints b

Joint b

Bottom cover

Rear panel

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KS-FX7

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 five screws C and the two

screws Dattaching the rear bracket on the back of

the body. Remove the rear panel.

(KS-FX601U / KS-FX701U)

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. (KS-FX501U)

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 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.

1.

Removing the cassette mechanism section

(See Fig.9)

Fig.7

Fig.8

Fig.9

Rear panel

B

D

C

Main board

E

CN701

Cassette mechanism section

F

Top chassis

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KS-FX7

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 twelve 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 to 12)

Fig.10

Fig.11

Fig.12

G

GG

G

Rear cover

Joints c

Front panel

Rear cover

Front panel

Control switch board

Joint c

Joints c

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KS-FX7

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.

1.

2.

3.

4.

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.

1.

2.

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

B

A

Head amplifier P.W.B.

CN403

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KS-FX7

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.

1.

2.

3.

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.

1.

2.

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.

1.

2.

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.

1.

2.

3.

Removing the cassette holder and the

holder arm in the eject mode

(See Fig.7 and 8)

Fig.4CSoldering b Joint c

Fig.6

Tab f

D

Tab e

Cach

Head relay P.W.B.

Fig.7

Reinforce bracket

Reinforce

bracket

E

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

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KS-FX7

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).

1.

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.

1.

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.

1.

2.

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.

1.

2.

3.

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

F

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

G

Motor Belt

Flyhwheel

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KS-FX7

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.

1.

2.

3.

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.

1.

2.

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

G

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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KS-FX7

1-11

Release the plate from the three tabs o.

Push aside the gear over the reel table using a

pincette or something like that.

Remove the reel disc ass’y ( ) as with the reel disc

ass’y ( ).

1.

2.

3.

Removing the reel disc ass’y( )

(See Fig.12 to 15)

Do not break the front panel tab fitted

to the metal cover.

ATTENTION:

Prior to performing the following

procedure, remove the reel disc ( ).

ATTENTION:

Fig.15

Push aside the gear and reattach the reel disc Ass’y( ).

Reel disc ass’y( )

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KS-FX7

1-12

Adjustment method

Test instruments reqired for adjustment

1. Digital osclloscope(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

(mechanism adjustment)

Measuring conditions(Amplifier section)

Power supply voltage.............. DC14.4V (11V - 16V allowance)

Loadimpedance ........... 4 (4 to 8 allowance)

Line out level/Impedance............ 2.0V/20k load

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.

Frequency Range

FM: 87.5 MHz to 108.0 MHz

AM: 531 kHz to 1602 kHz

MC-109C for TAPA CURL confirmation

(without Padd type)

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KS-FX7

1-13

Head section view

Cassette mechanism

(Surface)

Arrangement of adjusting & test points

Motor assembly

Tape speed adjust

Playback head

Azimuth screw B

(Reverse)

Azimuth screw B

(Reverse) Azimuth screw A

(Forward)

Azimuth screw A

(Forward)

Playback Head

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KS-FX7

1-14

EXTKSRT002-18P

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 assembly

and main board assembly.

Check for mechanism driving section such as motor ,etc..

Disassembly method

1. Remove the bottom cover.

2. Remove the front panel assembly.

3. Remove the top cover .

4. Install the front panel.

5. Confirm that current is being carried by connecting

an extension cord jig.

Note

Available to connect to the CP701 connector when in-

stalling the front panel.

Cassette mechanism

Front panel assembly

Main board

Extension cord

EXTKSRT002-18P

to Main board

to Cassette mechanism

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KS-FX7

1-15

Mechanism adjustment section

Item Adjusting & Confirmation Methods Adjust Std. Value

1.Check to see if the reading of the frequency counter & W ow

flutter meter is within 2940-3090 Hz( FWD/REV ), and less

than 0.35% ( JIS RMS ).

2.In case of out of specification, adjust the motor with a built-

in volume resistor .

1.Play the test tape ( VT724 : 1kHz ) back and set the volume

position at 2V .

2.Playthetest tape ( VT739)backandconfirm 0 3dB at1kHz/

10kHz and -4+2dB at 1kHz/63Hz.

3.When 10kHz is out of specification, it will be necessary to

read adjust the azimuth.

Phase

045

Built-in

volumeresistor TapeSpeed

2940-3090Hz

Wow&Flutter

Less than

0.35%

(JIS RMS)

Speaker out

1kHz/10kHz

: 0dB 3dB,

63Hz/1kHz

: -4dB+2dB,

1. Tape running

adjustment

2. Azimuth

adjustment

confirmation

a) At forward play mode, make adjustment of peak of Lch / Rch

output with Azimuth screw A.

* For Oscilloscope litharge corrugation, set 45 as standard.

b) At Reverse play mode, make adjustment of peak of Lch / Rch

output with Azimuth screw B.

* For Oscilloscope litharge corrugation, set 45 as standard.

c) With AC volt meter confirm the difference of output for 4ch

between Lch / Rch at forward play mode and Lch / Rch

Reverse play mode being within 3.0dB.

d) After operation, make confirmation of Lch / Rch azimuth

output being within 1.0dB from adjustment value.

a) At Forward playmode, using mirror tape, make adjustment

with Azimuth screw A and Azimuth screw B, without curl of 4

parts of head tape guide.

b) At Reverse play mode, using mirror tape, make adjustment

with Azimuth screw A and Azimuth screw B, without tape

curl of 4 parts of head guide.

c) At Forward / Reverse play mode, make confirmation of no

tape curl of 4 parts of head tape guide.

2.TapeSpeedand

Wow & Flutter

3.Playback

Frequency

response

Azimuth

screw A

Azimuth

screw B

HEAD

Tape guide

OK

HEAD TAPE

Tape curl NG

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KS-FX7

1-16

1

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32

31

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17

SDA

GND

OUTLR

OUTLF

TL

B2L

B1L

IVL

ILL

QSL

IDL

MUTE

ICL

IMD

IBL

IAL

SCL

VCC

OUTRR

OUTRF

TR

B2R

B1R

IVR

ILR

QSR

IDR

Vref

ICR

CAP

IBR

IAR

CD-CH

TAPE

TUNER

POWER

SUPPLY

SOURCE

SELECTOR

VOLUME 1

+20 to -31 dB

LOUDNESS

LEFT

BASS

LEFT

+15 dB

TREBLE

LEFT

+12 dB

BASS

RIGHT

+15 dB

TREBLE

RIGHT

+12 dB

MUTE

FUNCTION

ZERO CROSS

DETECTOR

VOLUME 2

0 to 55 dB

BALANCE

FENDER REAR

VOLUME 2

0 to 55 dB

BALANCE

FENDER FRONT

HC BUS

REC

VOLUME 2

0 to -55dB

BALANCE

FENDER FRONT

VOLUME 2

0 to -55dB

BALANCE

FENDER REAR

VOLUME 1

+20 to -31 dB

LOUDNESS

RIGHT

LOGIC

21

31

2

19

16

15

13

11

22

20

18

17

14

23 25 24 26 27 28

30

29

1

32

3

4

10 8 9 7 6 512

1.Pin layout

3.Pin functions

2.Block diagram

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

No. Pin

No.

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

SDA

GND

OUTLR

OUTLF

TL

B2L

B1L

IVL

ILL

QSL

IDL

MUTE

ICL

IMO

IBL

IAL

Serial data input/output.

Ground.

output left rear.

output left front.

Treble control capacitor left channel or

input from an external equalizer.

Bass control capacitor left channel or

output to an external equalizer.

Bass control capacitor left channel.

Input volume 1.left control part.

Input loudness.left control part.

Output source selector. left channel.

Not used

Input C left source.

Not used

Input B left source.

Input A left source.

I/O

-

O

I

-

I

O

-

I

-

I

Symbol I/O Symbol I/O

Input A right source.

Input B right source.

Electronic filtering for supply.

Input C right source.

Reference voltage (0.5Vcc)

Not used

Output source selector right channel.

Input loudness right channel.

Input volume 1.right control part.

Bass control capacitor right channel

Bass control capacitor right channel or

output to an external equalizer.

Treble control capacitor right channel or

input from an external equalizer.

Output right front.

Output right rear.

Supply voltage.

Serial clock input.

I

-

I

-

O

I

-

O

I

O

-

I

IAR

IBR

CAP

ICR

Vref

IDR

QSR

ILR

IVR

B1R

B2R

TR

OUTRF

OUTRR

Vcc

SCL

Functions Functions

TEA6320T-X (IC161) : E.volume

Description of major ICs

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

KS-FX7

1-17

AN80T05LF (IC901) : Regulator

1.Terminal layout & Block diagram

2.Pin function

Pre

Drive

Thermal

Protection

Reference Voltage

Pre

Drive AMP

Out

ASO & Peak

Current Protection

AMP

Out

Pre

Drive Pre

Drive

1 2 3 4 5 6 7 8 9 10 11 12

ILL

10V MODE2 MODE1 STB VDD

5.6V AMP VCC ANT COM

8.7V AM

8.7V FM

8.7V GND

1

2

3

4

5

6

7

8

9

10

11

12

ILL

MODE2

MODE1

STB

VDD

AMP

VCC

ANT

COM

AM

FM

GND

10V power supply for illumination.

When 5V is input,becomes AM. and the antenna output is turned on.

When 5V is input,becomes AM. and the output of FM is switched.

When 5V is input, outputs to ILL,COM,and AMP. It is 0V usually.

5.6V power supply.

Power supply supply to remote amplifier

Back up. connects with ACC with it.

Power supply supply to auto antenna.

8.7V power supply.

The power supply of 8.7V to AM.

The power supply of 8.7V to FM.

Ground

No.

Symbol Function

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

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KS-FX7

1-18

1.Pin layout

2.Blockdiagram

40 31

11 20

1

10

30

21

PBFB2

PBRIN2

PNGND

PNFIN2

VCT

PBREF

PBFIN1

PBGND

PBRIN1

PBFB1

MSMODE

DRSW

TAPESW

MUTESW

NC

MSOUT

MSTC

G1FB

G2FB

PBTC2

PBOUT2

OUTREF2

TAPEIN2

GND

DIREF

LINEOUT2

NC

MSSW

PBTC1

PBOUT1

OUTREF1

TAPEIN1

NC

LINEOUT1

NC

MSLPF

31

32

33

34

35

36

37

38

39

40

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

30

29

28

27

26

25

24

23

22

21

+

-

+

-

+

-

+

-

+

-

7k/12k

300k

70 /12070 /120

100k

24dB

MS MODE

BIAS

MUTE

TAPE EQ

FWD/RVS

LPF DET

24dB

T2

X1

F2

30k

45k

F1

300k T1

F3

Vcc MS ON/

OFF

CXA2559Q(IC401):Head amp.

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

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KS-FX7

1-19

3.Pin function

Pin No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Symbol

PBTC1

PBOUT1

OUTREF1

TAPEIN1

Vcc

NC

LINEOUT1

NC

MSLPF

G2FB

GI1FB

MSTC

MSOUT

NC

MUTESW

TAPESW

DRSW

MSMODE

I/O

-

O

I

-

O

-

O

-

I

Function

Terminal of capacity of reproduction equalizer reproduction

Equalizer output terminal

Output standard terminal

Tape input terminal

Power supply terminal

Non connection

Line-out output terminal

Non connection

Detection LPF terminal between tunes

Detection level set terminal between tunes

Time constant connection terminal for the detection between tunes

Detection output terminal between tunes

Non connection

Mute function control terminal

Reproduction equalizer control terminal

Head change control terminal

Detection mode control terminal between tunes

Detection function control terminal between tunes

Non connection

Line-out output terminal

Resistance connection terminal for standard current setting

Earth terminal

Tape input terminal

Output standard terminal

Reproduction equalizer output terminal

Terminal of capacity of reproduction equalizer

Reproduction equalizer return terminal

Reproduction equalizer input terminal

Reproduction equalizer system earth terminal

Reproduction equalizer input terminal

Middle point terminal

Reproduction equalizer standard terminal

Reproduction equalizer input terminal

Reproduction equalizer system earth terminal

Reproduction equalizer input terminal

Reproduction equalizer return terminal

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

MSSW

NC

LINEOUT2

DIREF

GND

TAPEIN2

OUTREF2

PBOUT2

PBTC2

PBFB2

PNRIN2

PBGND

PBFIN2

VCT

PBREF

PBFIN1

PBGND

PBRIN1

PBFB1

I

-

O

-

I

O

-

I

-

I

O

I

-

I

CXA2559Q 2/2

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

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KS-FX7

1-20

I/O

LC72366-9985 (IC701) : SYSTEM CPU

Symbol FunctionPin No. XIN

GND

J-BUS SI

J-BUS SO

J-BUS SCK

J-BUS I/O

NC

LCD SO

LCD SCK

LCD CE

DIMMER IN

EVOL SO

EVOL SCK

NC

TUNER ILLUM

TAPE ILLUM

CD ILLUM

DEMERIT

NC

OPEN

NC

KS1

KS0

K3

K2

K1

K0

Vdd

TEST

FF/REW MODE

SEEK/STOP

MONO

RADIO/TAPE

BEEP LEVEL

PWR-CNT

ACC

KICK

I

-

I

O

-

O

-

O

-

O

I

-

I

-

I

O

-

O

-

Crystal oscillator input port

Connect to GND

Data input for J-BUS information

Data output for J-BUS information

Clock output for J-BUS information

Switching signal output for J-BUS information I/O, H:Out L:In

None connection

Data output for LCD driver

Information clock output for LCD driver data

Chip enable output for LCD driver

None connection

Data output for electrical volume

Clock output for electrical volume information

Non connection

Diode matrix output port for initial establishing

Non connection

Diode matrix output port for initial establishing

5V power supply port (+B)

Turn on all light indicator of LCD, L: All light a LED indicator

FF/REW mode select signal output

H:Auto seek, L: Stop Use both as IF count REQ and Seek/Stop

Forced monaural output port, H:Turn on Forced monaural

Non connection

"H" :Turn on power

Non connection

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

1. Pin layout

2. Pin function

24 ~ 1

41 ~ 64

25

40

~

80

65

~

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-FX7 User manual

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