Jvc Ks-fx288 User manual

SERVICE MANUAL

No.49662

Dec. 2001

KS-FX288

Area Suffix

UF China

CASSETTE RECEIVER

Contents

Safety precaution

Disassembly method

Adjustment method

Description of major ICs

1- 2

1- 3

1- 12

1- 16

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1-2

KS-FX288

!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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1-3

KS-FX288

Fig. 3

Disassembly method

Detaching the front panel unit

( See Fig.1 )

Push the Release button in the direction of arrow to

detach the front panel unit.

Removing the front chassis

( See Fig. 2 and 3 )

Disengage the four tabs ( a ) in the right and left sides of

unit and pull the front chassis forward to remove it.

Removing the bottom cover

( See Fig. 2 to 4 )

1. Removing the front chassis.

2. Turn the unit up side down.

3. Insert the four engagements ( b, c, d, e ) to the

screwdriver .

4. Turn the screwdriver and remove the bottom

cover.

Fig. 2

Fig. 4

Fig. 1

Front chassis

Bottom cover

Top chassis

Bottom cover

a

bc

a

Front chassis d

Bottom cover

Rear panel

e

Front panel unit

Push the release button

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1-4

KS-FX288

Removing the heat sink (See Fig.5)

1. Removing the front chassis.

2. Removing the bottom cover

3. Remove the three screws ( 1 and 1' ) retaining the

heat sink.

Removing the main board assembly

( See Fig. 5 to 7)

1. Removing the front chassis.

2. Removing the bottom cover.

3. Removing the heat sink.

Attach the heat sink with a screw ( 1' ) on operat-

ing checks.

4. Remove the two screws ( 2 ) retaining the main

board assembly.

5. Remove the six screws ( 3 ) and one screw ( 3' ) retaining

6. Separate the main board assembly and cassette

mechanism assembly.

7. Take out the main board assembly.

Fig. 5

Fig. 6

Fig. 7

( )

the rear panel.

Heat sink

11

1'

2

Main board assembly

Rear panel

333'

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1-5

KS-FX288

Fig. 9

Fig. 11

Fig. 10

Removing the cassette mechanism assembly

( See Fig. 8 )

1. Removing the front chassis.

2. Removing the bottom cover.

3. Removing the heat sink.

4. Removing the main board assembly.

5. Remove the four screws ( 4 ) retaining the cassette

mechanism.

6. Separate the top chassis and cassette mechanism.

Fig. 8

Removing the operation switch board

( See Fig. 9 to 11)

1. Detaching the front panel unit.

2. Turn the front panel back side down.

3. Remove the four screws ( 5 ) retaining the front

cover

4. Open the front cover gradually by disengaging the

three engagements ( g ) while pushing the top of

the front cover in the arrow "A" direction, then

disengage the three engagements ( h ) on the both

sides.

5. Place the front panel unit front side down.

6. Disengage the three engagements ( i ) on the

bottom to separate the front cover from the front

panel.

(Be careful not to lose the button springs.)

Front side

Cassette mechanism

Top chassis

44

gg

g

Front cover

A

5

h

Front cover

Front panel

iii

Operation switch board

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1-6

KS-FX288

Fig. 14

Removing the head amplifier board

( See Fig. 12 )

1. Removing the front chassis.

2. Removing the bottom cover.

3. Removing the heat sink.

4. Removing the main board assembly.

5. Removing the cassette mechanism.

6. Remove the screw ( 6 ) retaining the head ampli-

fier board.

7. Shift the two inter rocking sections ( j ) securing

the head amplifier board in the direction shown by

the arrow "B" to remove the printed circuit board.

8. From the connector CJ901 on the head amplifier

board from connector wire out going to the head

relay board.

Removing the chassis assembly

( See Fig. 13 and 14 )

1. Removing the front chassis.

2. Removing the bottom cover.

3. Removing the heat sink.

4. Removing the main board assembly.

5. Removing the cassette mechanism.

6. Removing the head amplifier board.

7. Turn the left side to cassette mechanism.

8. Remove the screw ( 7 ) retaining the relay board.

9 Shift the one inter rocking sections ( k ) securing

the relay board in the direction shown by the

arrow "C" to remove the printed circuit board.

10. Turn the back side down, remove the four screws

( 8 ) retaining the chassis assembly.

Fig. 12

Fig. 13

B

To head relay board

CJ901

Head amplifier board

j

6

Relay board

k

C

7

Chassis assembly

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1-7

KS-FX288

Prior to performing the following procedures, remove

the head amplifier board, the relay board and the

mechanism bracket.

Unsolder the three wires aon the direction switch

board.

Remove the one screw Aattaching the direction

switch board.

1.

2.

Removing the direction switch board

(See Fig.1)

Remove the screw Battaching the FF / REW lever

assembly on the back of the cassette mechanism

assembly.

Remove the screw Con the upper side of the FF /

REW lever assembly.

Lift and pull forward the FF / REW lever assembly to

disengage the joints b, c, dand e.

1.

2.

3.

Removing the FF / REW lever assembly

(See Fig.1)

Reattach the FF / REW lever assembly to the joint c

on the back of the chassis.

Reattach the pinch-roller shaft e, the change lever d

and the return link eto the chassis.

1.

2.

Reattaching the FF / REW lever assembly

(See Fig.1)

C

FF / REW lever assembly

Joint c

Joint b

B

A

Direction switch board

Joint d

Joint e

Soldering a

Fig.1

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1-8

KS-FX288

Prior to performing the following procedure, remove

the direction switch board and the FF / REW lever

assembly.

Remove the screw Dattaching the playback head.

Remove the C washer and pull out the FF roller.

Remove the S support plate, the A arm spring (a)

and (b), the playback head.

1.

2.

3.

Removing the playback head (See Fig.2)

The A arm spring (a) differs from the A

arm spring (b).

ATTENTION:

Prior to performing the following procedure, remove

the direction switch board and the FF / REW lever

assembly.

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

assembly from the chassis.

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

assembly from the chassis.

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

the shaft.

1.

2.

3.

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

assembly (See Fig.2)

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.

ATTENTION:

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

Fig.2

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1-9

KS-FX288

Prior to performing the following procedure, remove

the FF / REW lever assembly.

From the rear of the unit, bend the two tabs f

outwards and disengage the two joints gin the

direction of the arrow.

Push the eject lever and remove the cassette holder

from the playback head. Disengage the two joints h

of the cassette hanger / cassette holder and the eject

lever in the direction of the arrow.

Lift the cassette hanger / cassette holder and disengage

the joint iof the return link and the eject lever.

1.

2.

3.

Removing the cassette hanger / cassette

holder (See Fig.3)

Unsolder the two wires jon the motor assembly.1.

Turn over the cassette mechanism assembly and

remove the main belt and the sub-belt from the

motor pulley.

2.

Remove the two screws Gattaching the motor

assembly.

3.

Removing the motor assembly

(See Fig.5)

To replace the sub-belt, remove the

main belt and the sub-belt from the

motor pulley. Then remove the three

screws Eand one screw F. Replace

with a new sub-belt while lifting the reel

base assembly slightly.

ATTENTION:

Prior to performing the following procedure, remove

the FF / REW lever assembly and the cassette

hanger / cassette holder.

Remove the C washer and pull out reel disc assembly.1.

Removing the reel disc assembly

(See Fig.4)

Replace with a new C washer when

reattaching.

ATTENTION:

The main belt can now be removed.

ATTENTION:

Cassette holder

Cassette hanger

Return link

Joint i

Eject lever

Joint h

Joint g

Joint g Tab f

Tab f

Reel disc assembly

Flywheel (BF)

Flywheel (BR)

E

F

G

Main-belt

Reel base assembly

Sub-belt

Motor assembly

Motor pulley

Soldering j

Fig.3

Fig.4

Fig.5

C washer

Chassis

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1-10

KS-FX288

Raise the part kof the reel base assembly slightly

and remove the selector link (B) on the front side of

the cassette mechanism assembly by turning it as

shown in Fig.10.

Remove the three screws Eand the one screw F

on the underside of the cassette mechanism

assembly.

1.

2.

Removing the reel base assembly

(See Fig.5 and 6)

Prior to performing the following procedure, remove

the cassette hanger / cassette holder.

From the upper side of the cassette mechanism

assembly, remove the C washer from each shaft of

the flywheel (BF) and (BR).

Turn over the cassette mechanism assembly and

remove the main belt. Pull out the flywheel (BF) and

(BR) downward respectively.

1.

2.

Removing the Flywheel (BF) and (BR)

assembly (See Fig.4 and 5)

The reel base assembly is not

repairable. Handle with care.

ATTENTION:

Selector link (B).

Inside of the reel base assembly

Reel disc assembly

Flywheel (BF)

Flywheel (BR)

E

F

G

Main-belt

Reel base assembly

Sub-belt

Motor assembly

Motor pulley

Soldering j

Fig.4

Fig.5

Fig.6Fig.7

C washer

Pinch-roller (R) assembly

Turn the selector link (B).

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1-11

KS-FX288

Unsolder the two wires lon the mute switch board on

the back of the cassette mechanism assembly.

Remove the screw Hattaching the mute switch

board.

1.

2.

Removing the mute switch board

(See Fig.8)

Prior to performing the following procedure, remove

the motor assembly.

Unsolder the two wires mon the power switch on the

side of the cassette mechanism assembly.

Remove the screw Iattaching the power switch.

1.

2.

Removing the power switch (See Fig.9)

Cassette mechanism assembly

Soldering l

HMute

switch board

Soldering m

IPower switch

Cassette mechanism assembly

Rower switch

Motor assembly

Fig.8

Fig.9

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1-12

KS-FX288

Adjustment method

Test Instruments reqired for adjustment

1. Digital osclloscope(100MHz)

2. Frequency Counter meter

3. Electric voltmeter

4. Wow & flutter meter

5.TestTapes

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

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

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

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

6.Torquegauge ....................Cassette type for CTG-N

(mechanism adjustment)

Measuring conditions(Amplifier section)

Power supply voltage.............. DC14.4V (10.5 - 16V)

Loadimpedance ........... 4 (2Speakers connection)

Line out............................................................ 20k

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.

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

modulation signal on recieving.

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

deviation pilot off mono

FM stereo mode 1kHz,67.5kHz dev. pilot7.5kHz dev.

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

Frequency Band

Band FM 87.5-108MHz 50KHz step

AM 531-1602KHz 9KHz step

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1-13

KS-FX288

Playback head

Head azimuth screw

Fixed screw

Height adjusting screw c

Height adjusting screw b

Height adjusting screw a

Arrangement of adjusting & test points

Head section view

Cassette mechanism

(Surface)

Tape speed adjust

Motor assembly

Playback head

Azimuth screw

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1-14

KS-FX288

Extension cord

: EXTKSRT002-6P

EXTKSRT002-6P

Front panel assembly

Main board

Cassette mechanism

Information for using a car audio service jig

1. For 1995 and 1996 , 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 : EXTKSRT002-6P ( 6 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 CN701 connector when in-

stalling the front panel.

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1-15

KS-FX288

Mechanism adjustment section

Item Adjusting & Confirmation Methods Adjust Std. value

"Head Height Adjustment"

Note

Adjust the azimuth directly.When you adjust the height us-

ing a mirror tape, remove the cassette housing from the

mechanism chassis.

After installing the cassette housing, perform the azimuth

adjustment.

1.load the mirror tape ( SCC-1659 ). Adjust with height

adjustmentscrew (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.

2.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.

3.Adjust the azimuth screw (b) so that line "B" of the mirror

tape runs in the center between Lch and Rch in the forward

play mode.

"Head Azimuth Adjustment"

1.Load the test tape ( VT724: 1kHz ) and play it back in the

reverse play mode. set the Rch output level to maximum.

2.Load the test tape ( VT703: 10kHz ) and play it back in the

forward play mode. Adjust the Rch and Lch output levels

tomaximum, with azimuth adjustment screw (b).

In this case, the phase difference should be within 45 .

3.Engage the reverse mode and adjust the output level to

maximum, with azimuth adjustment screw (c).

*The phase difference should be 45_Kor more.

4.When switching between forward and reverse modes, the

difference between channels should be within 3dB.

*Between FWD Lch and Rch, REV Lch and Rch.

5.When the test tape ( VT721 : 315Hz ) is played back, the

level difference between channels should be within 1.5dB.

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

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.Playthe test tape( VT739 )backand confirm 0 3dBat1kHz/

8kHz and -4+2dB at 1kHz/125Hz.

3.When 8kHz is out of specification, it will be necessary to

read adjust the azimuth.

Head shield

The head is at low position

during FWD.

The head is at height position

during REV.

A Line

B Line

Phase

screw (c) screw (a)

screw (b)

Head azimuth

screw Fixed screw

045

Built-in

volumeresistor Tape speed

2940-3090Hz

Wow&Flutter

Less than

0.35%

(JIS RMS)

Speaker out

1kHz/8kHz

: 0dB_}3dB,

125Hz/1kHz

: -4dB+2dB,

1.Head azimuth

2.TapeSpeedand

Wow & Flutter

3.Playback

Frequency

response

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0

5

1

5

1

3

6

7

3

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1-16

KS-FX288

AN80T05LF (IC781) : 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

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

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1-17

KS-FX288

HA13158A (IC981) : Power amp

1. Pin layout

2. Block diagram

IN1

IN2

IN3

IN4

STBY

2

1

11

13

23

10

TAB

PROTECTOR (ASO

SURGE, TSD)

INPUTBUFFER1

INPUTBUFFER2

INPUTBUFFER3

INPUTBUFFER4

AMP1

AMP2

AMP3

AMP4

MUTE

PVCC1PVCC2

INVCC +

-

+

-

+

-

+

-

12 22

14 18 6

3

4

5

7

8

9

15

16

17

19

20

21

1 ~ 23

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

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1-18

KS-FX288

LC72362N-9920 (IC701):System controller

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

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

XIN

GND

J BUS SI

J BUS SO

J BUS SCK

J BUSI/O SEL

NC

LCD SO

LCD SCK

LCD CE

NC

E.VOL SO

E.VOL SCK

NC

TUNER ILLUM

TAPE ILLUM

CD ILLUM

DIMMER OUT

NC

KS1

KS0

K3

K2

K1

K0

Vdd

TEST

NC

SEEK/STOP

MONO

RADIO/TAPE

BEEP LEVEL

POWER CNT

Acc

NC

BEEP

NC

TAPE IN

F/R SENSE

TAPE MUTE

SD/ST

NC

DETACH

NC

J BUS INT

REMOCON

FM/AM

DOLBY

NC

MUTE

MEMORY DET

LEVEL METER

SMETER

KEY 2

KEY1

KEY0

ACCDET

SENS

NC

FM/AM IF COUNT

NC

Vdd

AM OSC

FM OSC

Vss

NC

ED

TEST 1

XOUT

I

-

I

O

-

O

-

O

-

O

I

-

I

-

I

-

O

-

O

-

I

-

I

-

I

-

I

-

I

-

I

-

I

-

O

-

O

Crystal oscillator

To GND

Bus serial data input from CP751

Bus serial data output to CP751

Bus serial clock output to CP751

BUS I/O switch signal output

Non connect

Serial data output to IC651

Serial clock output to IC651

Chip enable output to IC651

Non connect

Serial data output

Serial clock output

Non connect

Initializing output port

Initializing input port

Non connect

Initializing input port

Power supply

Test input

Non connect

Output the "If signal request"

Monaural and stereo change

over output

Non connect

Power control output

Power supply

Non connect

H:RADIO L:TAPE

FORWARD/REVERSE switch detector

DIR.FF/REW MUTE

Station detector and ST input

Non connect

Detection of Front Panel

Non connect

BUS interruption signal detection communication

To GND

Change over the FM/AM Input

Non connect

The mute time is controlled by the

connected capacitor when changing

over the FM/AM

Memory detector input

Mementary key input

Signal meter input

ACC DET

To GND

Non connect

AM/FM Frequency detection

Non connect

Power supply

Input the local oscillator signal of AM

Input the local oscillator signal of FM

Non connect

PLL Error signal output

To GND

Crystal oscillator

No. Symbol I/O Function Pin

No. Symbol I/O Function

1.Terminal Layout

2.Description

-

41 - 64

24 - 1

25

40

80

64

-

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

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1-19

KS-FX288

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

S1

S2

S3

S4

S5

S6

S7

S8

S9

S10

S11

S12

S13

S14

S15

S16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

S48

S47

S46

S45

S44

S43

S42

S41

S40

S39

S38

S37

S36

S35

S34

S33

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

S17

S18

S19

S20

S21

S22

S23

S24

S25

S26

S27

S28

S29

S30

S31

S32

DI

CL

CE

OSC

Vss

VDD2

VDD1

INH

VDD

COM3

COM2

COM1

S52

S51

S50

S49

LC75823W (IC651) : LCD driver

1. Pin Layout & Symbol

2. Pin Function

Pin No.

1 to 52

53 to 55

56

57

58

59

60

61

62

63

64

I/O

O

--

I

--

I/O

I

Segment output pins used to display data transferred

by serial data input.

Common driver output pins. The frame frequency is given

by : t0=(fosc/384)Hz.

Power supply connection. Provide a voltage of between

4.5 and 6.0V.

Display turning off input pin.

INT="L" (Vss) ----- off (S1 to S52, COM1 to COM3="L"

INT="H" (VDD)----- on

Serial data can be transferred in display off mode.

Used for applying the LCD drive 2/3 bias voltage

externally.

Must be connected to VDD2 when a 1/2 bias drive scheme

is used.

Used for applying the LCD drive 1/3 bias voltage

externally.

Must be connected to VDD1 when a 1/2 bias drive scheme

is used.

Power supply connection. Connect to GND.

Oscillator connection.

An oscillator circuit is formed by connecting an external

resistor and capacitor at this pin.

Serial data CE : Chip enable

interface connection

to the controller. CL : Sync clock

DI :Transfer data

Symbol

S1 to S52

COM1 to COM3

VDD

INH

VDD1

VDD2

Vss

OSC

CE

CL

DI

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

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1-20

KS-FX288

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

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 (IC931) : E.volume

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-FX288 User manual

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