JVC KS-FX8 Service Manual

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Page 1

KS-FX8

SERVICE MANUAL

CASSETTE RECEIVER

4982620034

KS-FX8

Area Suffix

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

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

No.49826

2003/4

Page 2

KS-FX8

1.1 Safety Precautions

SECTION 1

Important 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.

1-2 (No.49826)

Page 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.

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 a on the left side, two joints b on the right side and joint c on 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.

KS-FX8

Front panel assembly

Detach button

Fig.1

Bottom cover

Joint b

Joint a

Joint b

Joint c

Fig.2

(No.49826)1-3

Page 4

KS-FX8

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 A on the both sides of the main

body. (See Fig.3.)

(2) Remove the two screws B on the front side of the main

body. (See Fig.4.)

(3) Release the two joints d and two joints e on the both sides

of the main body, then remove the front chassis assembly toward the front. (See Fig.3.)

Joint d

Joint e

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 C and two screws D attaching the

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

Joint d

Front chassis assembly

Joint e

Fig.3

Front chassis assembly

Fig.4

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 F and five screws G at-

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

1-4 (No.49826)

Heat sink

Fig.5

Rear bracket

Fig.6

Page 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 H attaching the main board on the

top chassis.

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

the cassette mechanism assembly.

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 J attaching 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.

KS-FX8

Main board

CP701

Fig.7

Cassette mechanism assembly

Connector

Head board

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 K attaching 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.

Mecha board

Top chassis

J J

CN403

Fig.8

Mecha board

Fig.9

Top chassis

Hook e

Mecha bracket (L)

(No.49826)1-5

Page 6

KS-FX8

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 L attaching 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.)

Rear cover

Joint f

Joints f

Fig.10

Front panel assembly

Joint

Rear cover

Front board

Joints f

Fig.11

Front panel assembly

Fig.12

1-6 (No.49826)

Page 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 a on the direction switch board. (2) Remove the one screw A attaching the direction switch

board.

2.2.2 Removing the FF / REW lever assembly

(See Fig.1)

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

bly on the back of the cassette mechanism assembly.

(2) Remove the screw C on 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, d and e.

2.2.3 Reattaching the FF / REW lever assembly

(See Fig.1)

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

back of the chassis.

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

the return link e to the chassis.

FF / REW lever assembly

Joint c

KS-FX8

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 D attaching the playback head. (2) Remove the C washer and pull out the FF roller. (3) Remove the S support plate, the A arm spring (a) and (b),

the playback head.

ATTENTION:

The A arm spring (a) differs from the A arm 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.

Joint e

Joint d

Soldering a

Direction switch board

Fig.1

Pinch-roller (R) assembly

Shaft

Remove the P arm spring (r) from the chassis.

Joint b

C washer

A arm spring (b)

FF roller

S support plate

Playback head

Pinch-roller (F) assembly

A arm spring (a)

Shaft

Remove the P arm spring (f) from the chassis.

P arm spring (r)

P arm spring (f)

Fig.2

(No.49826)1-7

Page 8

KS-FX8

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 f outwards and

disengage the two joints g in the direction of the arrow.

(2) 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.

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

the joint i of the return link and the eject lever.

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

ATTENTION:

Replace with a new C washer when reattaching.

Joint g

Cassette holder

Cassette hanger

Chassis

Tab f

C washer

Return link

Joint i

Eject lever

Joint h

Joint g

Fig.3

2.2.8 Removing the motor assembly (See Fig.5)

(1) Unsolder the two wires j on 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 G attaching the motor assembly.

C washer

Flywheel (BF)

Fig.4

Main-belt

Reel disc assembly

Motor assembly

Sub-belt

Motor pulley

Soldering j

1-8 (No.49826)

Flywheel (BR)

Reel base assembly

Fig.5

Page 9

KS-FX8

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 C washer 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) downward respectively.

C washer

Reel disc assembly

C washer

Fig.4

2.2.10 Removing the reel base assembly (See Fig.5 and 6)

(1) Raise the part k of 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 E and the one screw F on the un-

derside of the cassette mechanism assembly.

ATTENTION:

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

Pinch-roller (R) assembly

Selector link (B).

Turn the selector link (B).

Fig.6

Inside of the reel base assembly

Flywheel (BF)

Flywheel (BR)

Main-belt

Sub-belt

Reel base assembly

Fig.5

Motor assembly

Motor pulley

Soldering j

Fig.7

(No.49826)1-9

Page 10

KS-FX8

2.2.11 Removing the mute switch board (See Fig.8)

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

back of the cassette mechanism assembly.

(2) Remove the screw H attaching the mute switch board.

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 m on the power switch on the side

of the cassette mechanism assembly.

(2) Remove the screw I attaching the power switch.

Cassette mechanism assembly

Soldering l

Fig.8

Soldering m

Cassette mechanism assembly

Power switch

Fig.9

Rower switch

Motor assembly

Mute switch board

1-10 (No.49826)

Page 11

SECTION 3

Adjustment method

Test instruments required for adjustment Standard volume position

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

(Mechanism adjustment)

Measuring conditions (Amplifier section)

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 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 (1 V,50 /open terminal)

KS-FX8

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)

Frequency band

Band

87.5 MHz to 108.0MHz

531 kHz to 1602 kHz

(No.49826)1-11

Page 12

KS-FX8

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.

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

sassembl

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.

y met

hod

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.

To Cassette mechanism

Extension cord EXTKSRT002-18P

To Main board

EXTKSRT002-18P

Cassette mechanism

1-12 (No.49826)

Front panel assembly

Main board

Page 13

Arrangement of adjusting & test points

Cassette mechanism

(Surface)

Motor assembly

Tape speed adjust

KS-FX8

Azimuth screw

(Forward)

Playback head

Head section view

Azimuth screw B

(Reverse)

Azimuth screw B

(Reverse)

Playback head

Azimuth screw A

(Forward)

(No.49826)1-13

Page 14

KS-FX8

Item

Head

1. azimuth adjustment

Conditions

Test tape: SCC-1659 VT703 (10kHz)

Test tape: VT724 (1kHz) VT703 (10kHz) VT721 (315Hz)

Adjustment and Confirmation methods

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

1. 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

2. 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

3. that line B of the mirror tape runs in the center between Lch and Rch in the forward play mode.

Head azimuth adjustment

Load VT724 (1kHz) and play it back in

1. the reverse play mode. Set the Rch output level to max.

Load VT703 (10kHz) and play it back in

2. 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

3. output level to max, with azimuth adjustment screw C. (The phase difference should be 45 or more.)

When switching between forward and

4. reverse modes, the difference between channels should be within 3dB. (Between FWD L and R, REV L and R.)

S.Values Adjust

A line

Head shield

The head is at low position during.

B line

Head shield

The head is at High position during REV.

Output level: Maximum

PBHead

FWD Adj B

REV Adj C

(0 ) (45 )

HEIGHT Adj A

phase

Tape speed

2. and wow flutter confirmation

Play back

3. frequency response confirmation

1-14 (No.49826)

When VT721 (315Hz) is played back,

5. the level difference between channels should be within 1.5dB.

Test tape: VT712 (3kHz)

Test tape: VT724 (1kHz) VT739 (63Hz / 1kHz / 10kHz)

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

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

1. 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

2. motor with a built-in volume resistor.

Play test tape VT724, and set the volume

1. position at 2V.

Play test tape VT739 and confirm.

2. 1kHz / 10kHz: -1 3dB, 1kHz / 63Hz: 0 3dB,

When 10kHz is out of specification, it will be

3. necessary to read adjust the azimuth.

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

Page 15

4.1 AN80T05 (IC901) : Regulator

• Pin layout & Block diagram

Reference Voltage

Thermal

Protection

SECTION 4

Description of major ICs

ASO & Peak

Current Protection

KS-FX8

Pre

Drive

Pre

Drive

AMP

Out

AMP

Out

123456789101112

ILL

MODE2 MODE1 STB VDD

10V

5.6V

AMP VCC ANT COM

• 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

Pre

Drive

8.7VAM8.7VFM8.7V

Pre

Drive

GND

(No.49826)1-15

Page 16

KS-FX8

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

• Pin layout & block diagram

PBFB2

PBRIN2

PBGND

PBFIN2

VCT

PBREF

PBFIN1

PBGND

PBRIN1

PBFB1

PBTC2

30 29 28

7k/12k

45k

12345

300k

30k

300k

7k/12k

PBOUT2

OUTREF2

TAPEIN2

100k

70 /120

100k

70 /120

GND

DIREF

BIAS

MUTE

TAPE EQ

FWD/RVS

Vcc

LPF

LINEOUT2

23 22 21

OFF/B

8910

TCH2

MS MODE

NR MODE

DET

MS ON/

OFF

• Pin function

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

1-16 (No.49826)

MSSW

Pin No. Symbol I/O Function

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

Page 17

4.3 HD74HC126P (IC801) : Buffer

•Pin layout •Pin function

Input Output

11C

21A

31Y

CA Y

LX Z

HL L

HH H

KS-FX8

• Block diagram

42C

52A

62Y

7GND

( TOP VIEW )

(No.49826)1-17

Page 18

KS-FX8

4.4 KIA7810PI (IC902) : Regulator

• Pin layout

• Block diagram

1 2 3

1 INPUT

R4 R18

Q12

Q13

R10 R3

Q10

R15

Q14

R14

R16

Q15

Q11

R13

R21

R17

Q16

R12

Q17

R11

3 OUTPUT

R20

R19

2 GND

1-18 (No.49826)

Page 19

4.5 LB1641 (IC402) : DC Motor driver

•Pin layout •Pin function

Input Output

IN1 IN2 OUT1 OUT2

0000 Brake

1 2 3 4 5 6 7 8 9

GND OUT1 P1

VZ IN1 IN2

VCC1

VCC2 P2

OUT2

1 0 1 0 CLOCKWISE

0 1 0 1 COUNTER-CLOCKWISE

1100 Brake

4.6 RPM6938-SV4 (IC602) : Remote control receiver

• Block diagram

Vcc

I/V conversion

magnetic shield

AMP

BPF

for trimming circuit

AGC

Detector

Comp

22k ohm

KS-FX8

Mode

VDD

OUT

GND

(No.49826)1-19

Page 20

KS-FX8

4.7 LA47505 (IC301) : Power amp.

• Terminal layout

206

Stand by

Switch

Ripple

Filter

Protective

circuit

Mute

circuit

Muting &

On Time Control

Circuit

protective

circuit

1-20 (No.49826)

Page 21

•Pin layout

AC CONT1

GND1

OUTFR-

STBY

OUTFR+

Vcc1/2

OUTRR-

GND2

OUTRR+

VREF

INRR

INFR

SGND

INFL

INRL

ONTIME

OUTRL+

GND3

OUTRL-

Vcc3/4

OUTFL+

MUTE

OUTFL-

GND4

• Pin function

Pin No. Symbol Function

1 AC CONT1 Header of IC

2 GND1 Power GND

3 OUTFR- Outpur(-) for front Rch

4 STBY Stand by input

5 OUTFR+ Output (+) for front Rch

6 Vcc1/2 Power input

7 OUTRR- Output (-) for rear Rch

8 GND2 Power GND

9 OUTRR+ Output (+) for rear Rch

10 VREF Ripple filter

11 INRR Rear Rch input

12 INFR Front Rch input

13 SGND Signal GND

14 INFL Front Lch input

15 INRL Rear Lch input

16 ONTIME Power on time control

17 OUTRL+ Output (+) for rear Lch

18 GND3 Power GND

19 OUTRL- Output (-) for rear Lch

20 Vcc3/4 Power input

21 OUTFL+ Output (+) for front

22 MUTE Muting control input

23 OUTFL- Output (-) for front

24 GND4 Power GND

25 NC No connection

KS-FX8

(No.49826)1-21

Page 22

KS-FX8

4.8 LC72366-9A81 (IC701) : System CPU

• Pin layout

24 ~ 1

41 ~ 64

• Pin function

Pin No. Symbol I/O Function

1 XIN I Crystal oscillator input port

2 TEST2 - Connect to GND

3 J-BUS SI I Data input for J-BUS information

4 J-BUS SO O Data output for J-BUS information

5 J-BUS SCK O Clock output for J-BUS information

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

7 TEL-MUTE I Telephone mute signal detection input

8 LCD DA O Data output to LCD driver

9 LCD CL O Clock output to LCD driver

10 LCD CE O Chip enable output for LCD driver

11 SDA O E.volume clock output

12 SCL O E.volume clock output

13 EVOL SCK O Clock output for electrical volume information

14 OPEN I Door open detecting

15 ANT REMOTE O Antenna remote control output

16 MUTE CONTORL O Mute output

17 NC - Non connection

18 NC - Non connection

19 NC - Non connection

20 NC - Non connection

21 NC - Non connection

22 NC - Non connection

23 NC - Non connection

24 NC - Non connection

25 KS1 - Non connection

26 KS0 O Diode matrix output port for initial establishing

27 K3 I Diode matrix output port for initial establishing

28 K2 I Diode matrix output port for initial establishing

29 K1 - Non connection

30 K0 I Diode matrix output port for initial establishing

31 Vdd - 5V power supply port (+B)

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

33 FF/REW MODE O FF/REW mode select signal output

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

35 MONO O Forced monaural output port, H:Turn on Forced monaural

36 RADIO/TAPE - Non connection

37 NC - Non connection

38 POWER O Power ON/OFF switching output

1-22 (No.49826)

Page 23

Pin No. Symbol I/O Function

39 NC - Non connection

40 NC - Non connection

41 MOTOR O Main motor output H:Transport L: Stop

42 SUBMO+ O Sub-motor output(+), Loading direction to transport output

43 SUBMO- O Sub-motor output(-), Eject direction to transport output

44 BEEP - Non connection

45 TAPE IN I Switch for detecting to input cassette, L: Cassette in

46 STANDBY I Switch for detecting standby position

47 REEL I Switch for detecting tape end position

48 MODE I Detecting mode position input

49 F/R I Switch for detecting forward/reverse, H:FWD L:REV

50 MS I MS input port,

51 SD/ST I Station detector, Stereo signal input, H:SD

52 DETACH O Front panel detect

53 JOG-0 I Rotary volume signal 0 input

54 JOG-1 I Rotary volume signal 1 input

55 J-BUS INT I Cut in signal detecting port from J-Bus information

56 REMOCON I Remocon input

57 BAND O FM/AM band section

58 DOLBY O Dolby NR control

59 NC - Non connection

60 NC - Non connection

61 MEM DET I Back-up power supply detecting port, H:input L:no input

62 LEVELMETER I Pressure voice level voltage input for level meter.

63 S.METER I S meter voltage input

64 KEY2 I Key 2 input port

65 KEY1 I Key 1 input port

66 KEY0 I Key 0 input port

67 ACCDET I Hold port for Acc detecting, L: Hold mode

68 SENSE I Voltage sensor port

69 NC - Non connection

70 FM IF COUNT I FM frequency detecting

71 NC - Non connection

72 NC - Non connection

73 Vdd - 5V power supply (+B)

74 NC - Non connection

75 FM OSC - FM limited signal input

76 VSS - Ground port for power supply

77 NC O Non connection

78 E0 - Error signal output port for PLL

79 TEST1 O Test port for LSI, To connect ground

80 XOUT 4.5MHz crystal oscillator output

KS-FX8

(No.49826)1-23

Page 24

KS-FX8

4.9 LC75873NW (IC601) : LCD Driver

• Pin layout

60 41

1 20

• Block diagram

S4/P4

S3/P3

S2/P2

S62

S66

SEGMENT DRIVER

SHIFT REGISTOR

ADDRESS

DETECTOR

VDD1

VDD2

INH

OSC

VDD

VSS

COM2

COM3

COMON DRIVER

CLOCK

GENERATOR

COM1

• Pin function

Pin No. Pin name I/O Description

79,80

1,2,3

S1/P1 to S4/P4

S5 to S68

O Segment outouts for displaying the display data transferred by serial data input.

The S1/P1 to S4/P4 pins can be used as generalpurpose output ports under serial data control.

to 66

67 78 69

COM1 COM2 COM3

O Common driver outputs.

The frame frequency f0 is given by : f0 = (FOSC/384)Hz.

74 OSC I/O Oscillator connection

An oscillator circuit is formed by connecting an external resistor and capacitor to this pin.

76 77 78

CE CL

Serial data transfer inputs.

Connected to the controller.

CE:Chip enable CL:Synchronization clock DI:Transfer data

75 INH

I Display off control input

= "L"(VSS) ---Display forced off

•INH S1/P1 to S4/P4 = "L" (These pins are forcibly set to the segment output port function and held at the low level.) S5 to S68 = "L" COM1 to COM3"L"

= "H"(HDD)---Display on

•INH However, serial data transfer is possible when the display is forced off by this pin.

71 VDD1 I 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.

72 VDD2 I 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. 70 VDD - Power supply connection. Provide a voltage of between 3.0 and 6.0V. 73 VSS - Power supply connection. Connect to ground.

S1/P1

1-24 (No.49826)

Page 25

4.10 TEA6320T-X (IC161) : E.volume

•Pin layout

SDA

GND

OUTLR

OUTLF

B2L B1L

IVL

ILL

QSL

IDL

MUTE

ICL

IMD

IBL IAL

1 2 3 4

5 6 7 8

9 10 11 12 13 14 15

TUNER

CD-CH

TAPE

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

• Block diagram

10 8 9 7 6

SCL VCC OUTRR OUTRF TR B2R B1R IVR ILR QSR IDR Vref ICR CAP IBR IAR

KS-FX8

21 31

POWER

SUPPLY

VOLUME 1

+20 to -31 dB

LOUDNESS

LEFT

16 15 13

SOURCE

SELECTOR

22 20

VOLUME 1

+20 to -31 dB

LOUDNESS

RIGHT

18 17

23 25 24 26 27 28

• Pin functions

Pin No. Symbol I/O Functions

1 SDA I/O Serial data input/output.

2 GND - Ground.

3 OUTLR O output left rear.

4 OUTLF O output left front.

5 TL I Treble control capacitor left channel

or input from an external equalizer.

6 B2L - Bass control capacitor left channel

or output to an external equalizer.

7 B1L - Bass control capacitor left channel.

8 IVL I Input volume 1. left control part.

9 ILL I Input loudness. left control part.

10 QSL O Output source selector. left channel.

11 IDL - Not used

12 MUTE - Not used

13 ICL I Input C left source.

14 IMO - Not used

15 IBL I Input B left source.

16 IAL I Input A left source.

BASS LEFT

+15 dB

LOGIC

BASS RIGHT +15 dB

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

TREBLE

LEFT

+12 dB

TREBLE

RIGHT +12 dB

MUTE

FUNCTION

ZERO CROSS

DETECTOR

Pin No. Symbol I/O Functions

17 IAR I Input A right source.

18 IBR I Input B right source.

19 CAP - Electronic filtering for supply.

20 ICR I Input C right source.

21 Vref - Reference voltage (0.5Vcc)

22 IDR - Not used

23 QSR O Output source selector right channel.

24 ILR I Input loudness right channel.

25 IVR I Input volume 1. right control part.

26 B1R - Bass control capacitor right channel

27 B2R O Bass control capacitor right channel

or output to an external equalizer.

28 TR I Treble control capacitor right channel

or input from an external equalizer.

29 OUTRF O Output right front.

30 OUTRR O Output right rear.

31 Vcc - Supply voltage.

32 SCL I Serial clock input.

(No.49826)1-25

Page 26

KS-FX8

VICTOR COMPANY OF JAPAN, LIMITED

AV & MULTIMEDIA COMPANY MOBILE ENTERTAINMENT CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.49826)

Printed in Japan

WPC