Jvc Ks-fx8 User manual

SERVICE MANUAL

2003/4

KS-FX8

CASSETTE RECEIVER

4982620034

KS-FX8

TABLE OF CONTENTS

1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

3 Adjustment method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

4 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

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

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KS-FX8

1-2 (No.49826)

SECTION 1

Important Safety Precautions

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.

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KS-FX8

(No.49826)1-3

SECTION 2

Disassembly method

2.1 Main body

2.1.1 Removing the front panel assembly

(See Fig.1)

(1) Push the detach button in the lower left part of the front

panel assembly and remove the front panel assembly in

the direction of the arrow.

Fig.1

2.1.2 Removing the bottom cover

(See Fig.2)

• Prior to performing the following procedures, remove the front

panel assembly.

(1) Turn the main body upside down.

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

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

joint con the back side of the main body, then remove the

bottom cover from the main body.

CAUTION:

When releasing the joints using a screwdriver, do not damage

the main board.

Fig.2

Front panel assembly

Detach button

Bottom cover

Joint a

Joint b

Joint a

Joint b

Joint c

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KS-FX8

1-4 (No.49826)

2.1.3 emoving the front chassis assembly

(See Figs.3 and 4)

• Prior to performing the following procedures, remove the front

panel assembly and bottom cover.

(1) Remove the two screws Aon the both sides of the main

body. (See Fig.3.)

(2) Remove the two screws Bon the front side of the main

body. (See Fig.4.)

(3) Release the two joints dand two joints eon the both sides

of the main body, then remove the front chassis assembly

toward the front. (See Fig.3.)

Fig.3

Fig.4

2.1.4 Removing the heat sink

(See Fig.5)

• Prior to performing the following procedure, remove the front

panel assembly.

(1) Remove the two screws Cand two screws Dattaching the

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

heat sink.

Fig.5

2.1.5 Removing the rear panel

(See Fig.6)

• Prior to performing the following procedure, remove the front

panel assembly and bottom cover.

(1) Remove the two screws E, screws Fand five screws Gat-

taching the rear panel on the back side of the main body.

Fig.6

Joint d

Front chassis assembly

A

Joint e

A

B

Front chassis assembly

C

DHeat sink

GG

EE

F

Rear bracket

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KS-FX8

(No.49826)1-5

2.1.6 Removing the main board

(See Fig.7)

• Prior to performing the following procedures, remove the front

panel assembly, bottom cover, front chassis assembly, heat

sink and rear panel.

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

top chassis.

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

the cassette mechanism assembly.

Fig.7

2.1.7 Removing the cassette mechanism assembly

(See Fig.8)

• Prior to performing the following procedures, remove the front

panel assembly, bottom cover, front chassis assembly, heat

sink, rear panel and main board.

(1) Disconnect the card wire from the connector CN403 on the

mecha board.

(2) Remove the four screws Jattaching the cassette mecha-

nism assembly from the top chassis, take out the cassette

mechanism assembly.

(3) From the bottom side of the cassette mechanism assem-

bly, disconnect the wire from the connector on the head

board.

Fig.8

2.1.8 Removing the mecha board

(See Fig.9)

• Prior to performing the following procedures, remove the front

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

panel, main board and cassette mechanism assembly.

(1) Remove the screw Kattaching the mecha board.

(2) Bend the hook f in the direction of the arrow 1 and move the

mecha board in the direction of the arrow 2.

(3) Remove the mecha board from the mecha bracket (L) of

the top chassis.

Fig.9

H

Main board

CP701

H

JJ

J J Top chassis

Cassette mechanism assembly

CN403

Mecha board

Head board

Connector

K1

2

Mecha board

Hook e

Top chassis

Mecha bracket (L)

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KS-FX8

1-6 (No.49826)

2.1.9 Removing the front board

(See Figs.10 to 12)

• Prior to performing the following procedures, remove the front

panel assembly.

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

back side of the front panel assembly. (See Fig.10.)

(2) Release the nine joints g, the front panel assembly and the

rear cover become separate. (See Fig.11.)

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

(See Fig.12.)

Fig.10

Fig.11

Fig.12

L

Rear cover

Joints f

Joint f

Joint

f

Rear cover

Front panel assembly

Front board Front panel assembly

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KS-FX8

(No.49826)1-7

2.2 Cassette mechanism assembly

• Prior to performing the following procedures, remove the head

amplifier board, the relay board and the mechanism bracket.

2.2.1 Removing the direction switch board

(See Fig.1)

(1) Unsolder the three wires aon the direction switch board.

(2) Remove the one screw Aattaching the direction switch

board.

2.2.2 Removing the FF / REW lever assembly

(See Fig.1)

(1) Remove the screw Battaching the FF / REW lever assem-

bly on the back of the cassette mechanism assembly.

(2) Remove the screw Con the upper side of the FF / REW le-

ver assembly.

(3) Lift and pull forward the FF / REW lever assembly to disen-

gage the joints b, c, dand e.

2.2.3 Reattaching the FF / REW lever assembly

(See Fig.1)

(1) Reattach the FF / REW lever assembly to the joint con the

back of the chassis.

(2) Reattach the pinch-roller shaft e, the change lever dand

the return link eto the chassis.

Fig.1

2.2.4 Removing the playback head

(See Fig.2)

• Prior to performing the following procedure, remove the direc-

tion switch board and the FF / REW lever assembly.

(1) Remove the screw Dattaching the playback head.

(2) Remove the Cwasher and pull out the FF roller.

(3) Remove the Ssupport plate, the A arm spring (a) and (b),

the playback head.

ATTENTION:

The Aarm spring (a) differs from the Aarm spring (b).

2.2.5 Removing the pinch-roller (R) and (F) assembly

(See Fig.2)

• Prior to performing the following procedure, remove the direc-

tion switch board and the FF / REW lever assembly.

(1) Remove the P arm spring (f) in the pinch-roller (F) assem-

bly from the chassis.

(2) Remove the P arm spring (r) in the pinch-roller (R) assem-

bly from the chassis.

(3) Draw out the pinch roller (F) and (R) assembly from the

shaft.

ATTENTION:

The P arm spring (f) differs from the P arm spring (r).

ATTENTION:

The pinch roller (F) assembly differs from the pinch roller (R)

assembly.

Fig.2

C

FF / REW lever assembly

Joint c

Joint b

B

A

Direction switch board

Joint d

Joint e

Soldering a

A arm spring (b) A arm spring (a)

Pinch-roller (R) assembly Pinch-roller (F) assembly

Shaft Shaft

S support plate

D

C washer

P arm spring (f)

P arm spring (r)

Remove the P arm spring (f)

from the chassis.

Remove the P arm spring (r)

from the chassis.

Playback head

FF roller

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KS-FX8

1-8 (No.49826)

2.2.6 Removing the cassette hanger / cassette holder

(See Fig.3)

• Prior to performing the following procedure, remove the FF /

REW lever assembly.

(1) From the rear of the unit, bend the two tabs foutwards and

disengage the two joints gin the direction of the arrow.

(2) Push the eject lever and remove the cassette holder from

the playback head. Disengage the two joints hof the cas-

sette hanger / cassette holder and the eject lever in the di-

rection of the arrow.

(3) Lift the cassette hanger / cassette holder and disengage

the joint iof the return link and the eject lever.

Fig.3

2.2.7 Removing the reel disc assembly

(See Fig.4)

• Prior to performing the following procedure, remove the FF /

REW lever assembly and the cassette hanger / cassette hold-

er.

(1) Remove the Cwasher and pull out reel disc assembly.

ATTENTION:

Replace with a new Cwasher when reattaching.

Fig.4

2.2.8 Removing the motor assembly

(See Fig.5)

(1) Unsolder the two wires jon the motor assembly.

(2) Turn over the cassette mechanism assembly and remove

the main belt and the sub-belt from the motor pulley.

ATTENTION:

The main belt can now be removed.

(3) Remove the two screws Gattaching the motor assembly.

Fig.5

Cassette holder

Cassette hanger

Return link

Joint i

Eject lever

Joint h

Joint g

Joint g Tab f

Tab f

Chassis

Reel disc assembly

C washer

Flywheel (BF)

Flywheel (BR)

E

F

G

Main-belt

Reel base assembly

Sub-belt

Motor assembly

Motor pulley

Soldering j

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KS-FX8

(No.49826)1-9

2.2.9 Removing the Flywheel (BF) and (BR) assembly

(See Fig.4 and 5)

• Prior to performing the following procedure, remove the cas-

sette hanger / cassette holder.

(1) From the upper side of the cassette mechanism assembly,

remove the Cwasher from each shaft of the flywheel (BF)

and (BR).

(2) Turn over the cassette mechanism assembly and remove

the main belt. Pull out the flywheel (BF) and (BR) down-

ward respectively.

Fig.4

Fig.5

2.2.10 Removing the reel base assembly

(See Fig.5 and 6)

(1) Raise the part kof the reel base assembly slightly and re-

move the selector link (B) on the front side of the cassette

mechanism assembly by turning it as shown in Fig.6.

(2) Remove the three screws Eand the one screw Fon the un-

derside of the cassette mechanism assembly.

ATTENTION:

The reel base assembly is not repairable. Handle with care.

Fig.6

Fig.7

Reel disc assembly

C washer

Flywheel (BF)

Flywheel (BR)

E

F

G

Main-belt

Reel base assembly

Sub-belt

Motor assembly

Motor pulley

Soldering j

Selector link (B).

Pinch-roller (R) assembly

Turn the selector link (B).

k

Inside of the reel base assembly

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KS-FX8

1-10 (No.49826)

2.2.11 Removing the mute switch board

(See Fig.8)

(1) Unsolder the two wires lon the mute switch board on the

back of the cassette mechanism assembly.

(2) Remove the screw Hattaching the mute switch board.

Fig.8

2.2.12 Removing the power switch

(See Fig.9)

• Prior to performing the following procedure, remove the motor

assembly.

(1) Unsolder the two wires mon the power switch on the side

of the cassette mechanism assembly.

(2) Remove the screw Iattaching the power switch.

Fig.9

Cassette mechanism assembly

Soldering l

HMute switch board

Rower switch

Motor assembly

Soldering m

IPower switch

Cassette mechanism assembly

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KS-FX8

(No.49826)1-11

SECTION 3

Adjustment method

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

Test instruments required for adjustment Standard volume position

Measuring conditions (Amplifier section)

Frequency band

1. Digital oscilloscope (100MHz)

2. Frequency counter meter

3. Electric voltmeter

4. Wow & flutter meter

5. Test tapes

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

(Mechanism adjustment)

VT724.......................for DOLBY level measurement

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

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

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

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.

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

Load impedance............ 4 (4 to 8 allowance)

Line out level/Impedance..............1.0V/20k load (250 nWb/m)

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

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

87.5 MHz to 108.0MHz

531 kHz to 1602 kHz

Band FM

AM

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KS-FX8

1-12 (No.49826)

Front panel assembly

Extension cord

EXTKSRT002-18P

Main board

Cassette mechanism

EXTKSRT002-18P

To

Main board

To

Cassette mechanism

D

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sasse

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hod

1. Remove the front panel assembly.

2. Remove the bottom cover.

3. Remove the front chassis assembly.

4. Remove the heat sink.

5. Remove the rear panel

6. Remove the main board.

7. Reattach the heat sink with the two screws D. (Refer to Disassembly method.)

8. Reattach the rear panel with the screw G. (Refer to Disassembly method.)

9. Reattach the front chassis assembly with the screw B. (Refer to Disassembly method.).

10. Reattach the front panel assembly.

11. 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.

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.

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

Information for using a car audio service jig

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KS-FX8

(No.49826)1-13

Head section view

Cassette mechanism

(Surface)

Arrangement of adjusting & test points

Azimuth screw

A

(Forward)

Playback head

Tape speed adjust

Motor assembly

Azimuth screw B

(Reverse)

Azimuth screw A

(Forward)

Playback head

Azimuth screw B

(Reverse)

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KS-FX8

1-14 (No.49826)

Item Conditions Adjustment and Confirmation methods S.Values Adjust

Head

azimuth

adjustment

Head height adjustment

Adjust the azimuth directly. When you

adjust the height using a mirror tape,

remove the cassette housing from the

mechanism chassis. After installing the

cassette housing, perform the azimuth

adjustment.

Load the SCC-1659 mirror tape. Adjust with

height adjustment screw A and azimuth

adjustment screw B so that line A of the

mirror tape runs in the center between Lch

and Rch in the reverse play mode.

After switching from REV to FWD then to

REV, check that the head position set in

procedure 1 is not changed. (If the position

has shifted, adjust again and check.)

Adjust with azimuth adjustment screw B so

that line B of the mirror tape runs in the

center between Lch and Rch in the forward

play mode.

Test tape:

SCC-1659

VT703 (10kHz)

Test tape: VT712

(3kHz)

Test tape: VT724

(1kHz)

VT739

(63Hz / 1kHz / 10kHz)

1.

Tape speed

and wow

flutter

confirmation

2.

Play back

frequency

response

confirmation

3.

1.

2.

3.

Check to see if the reading of the F, counter /

wow flutter meter is within 3015Hz to 3045Hz

(FWD/ REV), and less than 0.35% (JIS RMS).

In case of out of specification, adjust the

motor with a built-in volume resistor.

1.

2.

Play test tape VT724, and set the volume

position at 2V.

Play test tape VT739 and confirm.

1kHz / 10kHz: -1 3dB,

1kHz / 63Hz: 0 3dB,

When 10kHz is out of specification, it will be

necessary to read adjust the azimuth.

1.

2.

3.

Load VT724 (1kHz) and play it back in

the reverse play mode.

Set the Rch output level to max.

Load VT703 (10kHz) and play it back in

the forward play mode. Adjust the Rch

and Lch output levels to max, with

azimuth adjustment screw B. In this case,

the phase difference should be within 45 .

Engage the reverse mode and adjust the

output level to max, with azimuth

adjustment screw C.

(The phase difference should be 45 or

more.)

When switching between forward and

reverse modes, the difference between

channels should be within 3dB. (Between

FWD L and R, REV L and R.)

When VT721 (315Hz) is played back,

the level difference between channels

should be within 1.5dB.

1.

2.

3.

4.

5.

Head azimuth adjustment

Tape speed:

3015Hz

to 3045Hz

Wow

flutter: less

than 0.35%

Speaker out

1kHz / 63Hz

: 0 3dB

1kHz / 10kHz

: -1 3dB

Built-in volume

resistor

The tuner section is of an adjustment-freedesign. In case the tuner is in trouble, replace the tuner pack.

A line

B line

Head shield

PBHead

FWD Adj B

REV Adj C HEIGHT Adj A

phase

(0 ) (45 )

Head shield

The head is at low position

during.

The head is at High position

during REV.

Output

level:

Maximum

Test tape:

VT724 (1kHz)

VT703 (10kHz)

VT721 (315Hz)

w

.

x

i

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1

6

3

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c

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8

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Q

TEL 13942296513 QQ 376315150 892498299

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KS-FX8

(No.49826)1-15

SECTION 4

Description of major ICs

4.1 AN80T05 (IC901) : Regulator

• Pin layout & Block diagram

• Pin function

Pin No. Symbol Function

1 ILL 10V power supply for illumination.

2 MODE2 When 5V is input, becomes AM. and the antenna output is turned on.

3 MODE1 When 5V is input,becomes AM. and the output of FM is switched.

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

5 VDD 5.6V power supply.

6 AMP Power supply supply to remote amplifier

7 VCC Back up. connects with ACC with it.

8 ANT Power supply supply to auto antenna.

9 COM 8.7V power supply.

10 AM The power supply of 8.7V to AM.

11 FM The power supply of 8.7V to FM.

12 GND Ground

Pre

Drive

Thermal

Protection

Reference Voltage

Pre

Drive

AMP

Out

ASO & Peak

Current Protection

AMP

Out

Pre

Drive Pre

Drive

Pre

Drive

123456789101112

ILL

10V

MODE2 MODE1 STB VDD

5.6V

AMP VCC ANT COM

8.7V

AM

8.7V

FM

8.7V

GND

w

.

x

i

a

o

y

u

1

6

3

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c

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3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

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L

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3

9

4

2

9

6

5

1

3

9

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8

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5

1

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TEL 13942296513 QQ 376315150 892498299

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KS-FX8

1-16 (No.49826)

4.2 CXA2560Q (IC401) : Dolby B type noise reduction system with play back equalizer amp.

• Pin layout & block diagram

• Pin function

PBFB2

PBRIN2

PBGND

PBFIN2

VCT

PBREF

PBFIN1

PBGND

PBRIN1

PBFB1

MS

M

DR

S

TA

P

MU

T

NR

S

MS

O

MS

T

G1

F

G2

F

PBTC2

PBOUT2

OUTREF2

TAPEIN2

GND

DIREF

LINEOUT2

TCH2

NC

MSSW

T

C1

U

T1

E

F1

I

N1

V

cc

NC

U

T1

C

H1

NC

L

PF

12345678910

30 29 28 27 26 25 24 23 22 21

20

19

18

17

16

15

14

13

12

11

31

32

33

34

35

36

37

38

39

40

7k/12k

300k

F2

F1

30k

45k

300k

7k/12k

F3

OFF/B

100k

T1

-

+

-

70 /120

1

T2

100k OFF/B

NR

BIAS

MUTE

TAPE EQ

FWD/RVS

LPF

+

-

DET

Vcc

MS MODE

NR MODE

MS ON/

OFF

-

+

NC

+

-

70 /120

Pin No. Symbol I/O Function

1 PBTC1 - Playback equalizer amplifier

capacitance

2 PBOUT1 O Playback equalizer amplifier

output

3 OUTREF1 O Output reference

4 TAPEIN1 I TAPE input

5 Vcc - Power supply

6NC-

7 LINEOUT1 O Line output

8 TCH1 - Time constant for the HLS

9NC-

10 MSLPF - Cut-off frequency adjustment

of the music sensor LPF

11 G2FB - Music signal interval detection

12 G1FB - Music signal interval detection

13 MSTC - Time constant for detecting

music signal interval

14 MSOUT O Music sensor out

15 NC - No use

16 NRSW I Dolby NR control

17 MUTESW I Mute function control

18 TAPESW I Playback equalizer amplifier

control

19 DRSW I Head select control

20 MSMODE I Music sensor mode control

21 MSSW I Music sensor control

22 NC -

23 TCH2 - Time constant for the HLS

24 LINEOUT2 O Line output

25 DIREF - Resistance for setting the

reference

26 GND - Ground

27 TAPEIN2 I TAPE input

28 OUTREF2 O Output reference

29 PBOUT2 O Playback equalizer amplifier

output

30 PBTC2 - Playback equalizer amplifier

capacitance

31 PBFB2 I Playback equalizer amplifier

feedback

32 PBRIN2 I Playback equalizer amplifier

input

33 PBGND - Playback equalizer amplifier

ground

34 PBFIN2 I Playback equalizer amplifier

input

35 VCT O Center

36 PBREF O Playback equalizer amplifier

reference

37 PBFIN1 I Playback equalizer amplifier

input

38 PBGND - Playback equalizer amplifier

ground

39 PBRIN1 I Playback equalizer amplifier

input

40 PBFB1 I Playback equalizer amplifier

feedback

Pin No. Symbol I/O 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

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9

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0

5

1

5

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Q

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KS-FX8

(No.49826)1-17

4.3 HD74HC126P (IC801) : Buffer

•Pinlayout •Pinfunction

• Block diagram

11C

21A

31Y

42C

52A

62Y

7GND

Vc

c

4C

4A

4Y

3C

3A

3Y

( TOP VIEW )

14

13

12

11

10

9

8

Input Output

CA Y

LX Z

HL L

HH H

1A

1

Y

2

Y

3

Y

4

Y

1C

2A

2C

3A

3C

4A

4C

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

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Q

TEL 13942296513 QQ 376315150 892498299

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KS-FX8

1-18 (No.49826)

4.4 KIA7810PI (IC902) : Regulator

• Pin layout

• Block diagram

1 2 3

1 INPUT

3 OUTPUT

2 GND

R4 R18

R8

Q8

R9

Q9

Q14

Q15

R13

R21

Q16

R12

R17

Q17

R11

Z1

R5

R6

R7

Q12

Q13

Q10

R1

Q1

Q7

R10 R3

Q5

Q6

R15

R2

Q2

R14

Q3

Q4

C1

R16

Q11

R20

R19

w

.

x

i

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o

y

u

1

6

3

.

c

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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

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3

9

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8

9

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9

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0

5

1

5

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Q

TEL 13942296513 QQ 376315150 892498299

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KS-FX8

(No.49826)1-19

4.5 LB1641 (IC402) : DC Motor driver

•Pinlayout •Pinfunction

4.6 RPM6938-SV4 (IC602) : Remote control receiver

• Block diagram

1 2 3 4 5 6 7 8 9

10

GND OUT1 P1 VZ IN1 IN2 VCC1 VCC2 P2 OUT2

Input Output Mode

IN1 IN2 OUT1 OUT2

0000 Brake

1 0 1 0 CLOCKWISE

0 1 0 1 COUNTER-CLOCKWISE

1100 Brake

AMP AGC

Detector

BPF

I/V

conversion

PD

Vcc

Comp

22k

ohm

magnetic shield

VDD

OUT

GND

for

trimming circuit

3

1

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

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3

Q

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KS-FX8

1-20 (No.49826)

4.7 LA47505 (IC301) : Power amp.

• Terminal layout

Muting &

On Time Control

Circuit

protective

circuit

Mute

circuit

Protective

circuit

Ripple

Filter

Stand by

Switch

11

16

14

13

25

15

10

4

1

12

22

17

19

18

21

23

24

2

3

5

8

7

9

206

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

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L

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3

9

4

2

9

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5

1

3

9

2

8

9

4

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1

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Q

TEL 13942296513 QQ 376315150 892498299

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JVC KS-FX8 User manual

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