JVC KSFX-834-R Service manual

SERVICE MANUAL

CASSETTE RECEIVER

KS-FX834R

KS-FX834R

Contents

Safety precaution
Disassembly method
Adjustment method
Description of major ICs

This service manual is printed on 100% recycled paper.

COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.

Area Suffix

E ---- Continental Europe

1-2
1-3
1-10
1-14

No.49571

Sep. 2000

KS-FX834R

Safety precaution

CAUTION

!

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

Disassembly method

Removing the front panel unit

(See Fig.1)

1. Press the release switch and remove the front
panel unit in the direction of the arrow.

KS-FX834R

Fig.1

c

Removing the front chassis

1.2.Remove the two screws A attaching the front
chassis.

Insert a screwdriver to the two joints a on the side
of the front chassis, two joints b on the right side
and one joint c from upside, then detach the front
chassis toward the front side.

(See Fig.2~3)

A

a

a

Front chassis

Fig.2

b

b

Removing the heat sink

1. Remove the three screws B attaching the heat sink

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

(See Fig.4)

B

B

Fig. 3

B

Heat sink

Fig. 4

1-3

KS-FX834R

Removing the bottom cover

1.2.Turn the body upside down.

Insert a screwdriver to the two joints d and two
joints e on both sides of the body and the joint f on
the back of the body, then detach the bottom cover
from the body.

Removing the rear panel

1.

Remove the front chassis.

(See Fig.5)

(See Fig.6 )

Bottom cover

d

e

f

Fig. 5

C

2.

Remove the heat sink.

3.

Remove the bottom cover.

4.

Remove the five screws B attaching the rear panel
and one screw C attaching the pine jack on the
back of the body.

Removing the main amplifier board
assembly

1.

Remove the front chassis.

2.

Remove the bottom cover.

3.

Remove the rear panel.

4.

Remove the two screws D attaching the main
amplifier board assembly on the top cover.

5.

Disconnect connector CP701 on the main amplifier
board assembly from the cassette mechanism
assembly.

(See Fig.7)

B

D

B
B

Fig. 6

Main board assembly

D

CP701

Fig. 7

1-4

KS-FX834R

Removing the Cassette mechanism
assembly

1.

Remove the front chassis.

2.

Remove the bottom cover.

3.

Remove the main amplifier board assembly.

4.

Remove the fore screws F attaching the cassette
mechanism assembly from the top cover.

(See Fig.8)

Removing the control switch board

(See Fig.9 and 10 )

Cassette mechanism assembly

F

F

Fig. 8

G

F

Top cover

F

G

1.

Remove the front panel unit from the main body.

2.

Remove the five screws G attaching the rear cover
on the back of the front panel unit.

3.

Remove the control switch board from the front
panel unit.

G

Fig. 9

LCD & Key control board

Fig. 10

G

1-5

KS-FX834R

<Removal of the cassette mechanism>

Cassette mechanism ass’y

Removing the mecha control P.W.B.

(See Fig.1 and 2)

1.

For the 6pin harness extending from connector
CN402 on the mecha control P.W.B, disconnect it
from the head relay P.W.B.

2.

Disconnect the card wire from connector CN403 on
the mecha control P.W.B.

3.

Remove the screw A attaching the mecha control
P. W. B .

4.

Move the tab a as shown in Fig.2 and remove the
mecha control P.W.B. while moving it in the direction
of the arrow.

Removing the cassette mechanism
assembly (See Fig.1 to 3)

1.

Disconnect the 6pin harness from connector CN402
and the card wire from CN403 on the mecha control
P.W.B. (Refer to Fig.1 and 2).

Head relay

P.W.B.

6pin
harness

CN402

CN402

Mecha control

A

CN403

Fig.1

CN403

Fig.2

Mecha control

P.W.B.

P.W.B.

Tab a

2.

Remove the four screws B on the bottom of the
cassette mechanism.

Mecha control

B

P.W.B.

Cassette mechanism ass’y

B

Fig.3

1-6

KS-FX834R

Removing the head relay P.W.B.

(See Fig.4)

1.

Unsolder the soldering b on the head relay P.W.B.

2.

Remove the screw C attaching the head relay P.W.B.

3.

Remove the head relay P.W.B. in the direction of the
arrow while releasing the two joints c.

Removing the load arm (See Fig.5)

1.

Remove the E washer attaching the load arm using
a pincette or something like that and remove the
spring d.

2.

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.

Fig.4

Cach

Load arm

Fig.5

Head relay P.W.B.

Soldering b

C

E washer

Joint c

Spring d

Removing the sub chassis (See Fig.6)

*

Prior to performing the following procedure, remove
the head relay P.W.B.

1.

Remove the screw D attaching the sub chassis.

2.

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.

Removing the cassette holder and the
holder arm in the eject mode

(See Fig.7 and 8)

*

Prior to performing the following procedure, remove
the head relay P.W.B., the load arm and the sub
chassis.

1.

Remove the screw E attaching the reinforce bracket.

2.

Remove the reinforce bracket.

Tab f

Sub chassis

Head relay

P.W.B.

D

Cassette mecha chassis

Cassette holder

Fig.6

Head relay P.W.B.

Tab e

Reinforce bracket

E

Reinforce
bracket

tab g

3.

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.

Joint h

Load arm

Holder arm

Fig.7

Joint h

1-7

KS-FX834R

Removing the play head (See Fig.9)

*

Prior to performing the following procedure, remove
the head relay P.W.B.and the sub chassis.

1.

Remove the two screws F attaching the play head
(The spring under the play head comes off at the
same time).

Shaft

Joint h

Pinch roller ass’y

Fig.8

Play head

Cassette holder
and holder arm

Joint h

Shaft

Pinch roller ass’y

Removing the pinch roller ass’y

(See Fig.9)

*

Prior to performing the following procedure, remove
the head relay P.W.B. and the sub chassis.

1.

Push each tab i in the direction of the arrow and pull
out the pinch rollers on both sides.

Removing the reel disc P.W.B.

(See Fig.10)

1.

Unsolder the soldering j on the reel disc P.W.B.

2.

Push the seven tabs k on the bottom of the cassette
mechanism assembly in the direction of the arrow.

Removing the motor and the sub motor

(See Fig.10 and 11)

Tab i

Tab i

Soldering j

G

Motor

F

Pinch roller ass’y

Fig.9

Reel disc P.W.B.

Tabs k

Tabs k

G

Tab i

Spring

Tab i

Cassette mechanism ass’y

Flywheel

Belt

Fig.10

1.

Unsolder the two soldering l of the motor and the sub
motor.

2.

Release the sub motor from the three tabs m. Push
the sub motor upward and pull out it.

3.

Remove the belt on the bottom of the cassette
mechanism assembly and remove the two screws G
attaching the motor.

ATTENTION:

The motors can be detached before
removing the load arm.

1-8

Sub motor

Tab m

Load arm

Soldering j

Tab m

Soldering l

Tab m

Soldering l

Motor

Fig.11

KS-FX834R

Removing the flywheel

(See Fig.10 and 12)

1.

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 .

2.

Remove the belt on the bottom of the cassette
mechanism ass’y.

3.

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.

ATTENTION:

When reassembling, make sure to use
a new slit washer.

Removing the reel disc ass’y( )

(See Fig.12 to 14)

Soldering j

G

Motor

Plate

Reel disc P.W.B.

G

Slit washer

Tab k

Tab o

Cassette mechanism ass’y

Tab k

Belt

Fig.10

Reel driver

The part n

Tabs o

Flywheel

Reel disc

ass’y( )

Push aside
the gear

*

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.

1.

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.

2.

Remove the reel driver spring and the reel table.

The part n

Slit washer

Shaft

Fig.13

The part n

Reel driver

Fig.12

Reel driver

Reel driver spring

Reel disc ass’y( )

Reel table

Fig.14

1-9

KS-FX834R

Adjustment method

Test instruments required for adjustment

1. Digital oscilloscope(100MHz)

2. Frequency Counter meter

3. Electric voltmeter

4. Wow & flutter meter

5. Test Tapes

MC-109C

VT724

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

...................

.......................

For TAPE CURL confirmation
(without Pad type)

For DOLBY level measurement

(mechanism adjustment)

Measuring conditions(Amplifier section)

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

Load impedance ........... 4 (2 Speakers connection)

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

Standard volume position

Balance and Bass,Treble volume .Fader
:Center(Indication"0")
Loudness,Dolby NR,Sound,Cruise:Off

following conditions. Playback the test tape VT721.

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

modulation signal on receiving.

FM mono mode 97.5MHz/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)

1-10

Arrangement of adjusting & test points

Cassette mechanism
(Surface)

Motor assembly

KS-FX834R

Tape speed adjust

Head section view

Azimuth screw A
(Forward)

Playback head

Azimuth screw B
(Reverse)

Azimuth screw B
(Reverse)

Azimuth screw A
(Forward)

Playback Head

1-11

KS-FX834R

Main board

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 in­stalling the front panel.

Cassette mechanism

to Cassette mechanism

Extension cord
EXTKSRT002-18P

Main board

Front panel assembly

to Main board

1-12

EXTKSRT002-18P

Mechanism adjustment section

Item Adjusting & Confirmation Methods Adjust Std. Value

1. Tape running
adjustment

2. Azimuth
adjustment
confirmation

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.

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.

KS-FX834R

Azimuth
screw A

Azimuth
screw B

2.Tape Speed and
Wow & Flutter

HEAD

Tape guide

OK

HEAD TAPE

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 built­in volume resistor .

Tape curl NG

0

Phase

Built-in
volume resistor

45

Tape Speed
2940-3090Hz
Wow&Flutter
Less than

0.35%
(JIS RMS)

3.Playback
Frequency
response

1.Play the test tape ( VT724 : 1kHz ) back and set the volume
position at 2V .

2.Play the test tape ( VT739 )back and confirm 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.

Speaker out
1kHz/10kHz
: 0dB 3dB,
63Hz/1kHz
: -4dB+2dB,

1-13

KS-FX834R

Description of major ICs

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

1.Pin layout & block diagram

PBTC2

PBFB2

31

PBRIN2

32

PBGND

33

PBFIN2

34

VCT

35

PBREF

36

PBFIN1

37

PBGND

38

PBRIN1

39

PBFB1

40

2. Pin function

PBOUT2

30 29 28

7k/12k

300k

­+

F2

30k

45k

30k

F1

+

-

300k

7k/12k

12345

PBTC1

PBOUT1

OUTREF2

27

x1

x1

70 /120 70 /120

OUTREF1

TAPEIN2

26

100k

T2

T1

100k

TAPEIN1

GND

Vcc

25

FWD/RVS

LPF

DIREF

+

BIAS

MUTE

TAPE EQ

Vcc

+

-

6

NC

LINEOUT2

24

OFF/B

-

F3

+

7

LINEOUT1

TCH2

NC

23 22 21

NR

MS MODE

NR MODE

DET

OFF/B

-

NR

8910

NC

TCH1

MS ON/

OFF

MSSW

MSLPF

20

19

18

17

16

15

14

13

12

11

MSMODE

DRSW

TAPESW

MUTESW

NRSW

NC

MSOUT

MSTC

G1FB

G2FB

Pin No. Symbol

1

2

3
4
5
6
7
8
9

10

11
12
13

14
15
16
17
18

19
20
21
22
23
24

PBTC1

PBOUT1

OUTREF1

TAPEIN1

Vcc

NC

LINEOUT1

TCH1

NC

MSLPF

G2FB
G1FB

MSTC

MSOUT

NC

NRSW

MUTESW

TAPESW

DRSW

MSMODE

MSSW

NC

TCH2

LINEOUT2

I/O Function

Playback equalizer amplifier

­capacitance

Playback equalizer amplifier

O

output
Output reference

O

TAPE input

I

Power supply

-

­Line output

O

Time constant for the HLS

-

­Cut-off frequency adjustment

­of the music sensor LPF

Music signal interval detection

­Music signal interval detection

­Time constant for detecting

­music signal interval

Music sensor out

O

No use

­Dolby NR control

I

Mute function control

I

Playback equalizer amplifier

I

control
Head select control

I

Music sensor mode control

I

Music sensor control

I

­Time constant for the HLS

­Line output

O

Pin No. Symbol

25

26
27
28
29

30

31

32

33

34

35
36

37

38

39

40

DIREF

GND

TAPEIN2

OUTREF2

PBOUT2

PBTC2

PBFB2

PBRIN2

PBGND

PBFIN2

VCT

PBREF

PBFIN1

PBGND

PBRIN1

PBFB1

I/O Function

-

Resistance for setting the
reference

-

Ground

I

TAPE input

O

Output reference

O

Playback equalizer amplifier
output

-

Playback equalizer amplifier
capacitance

I

Playback equalizer amplifier
feedback

I

Playback equalizer amplifier
input

-

Playback equalizer amplifier
ground

I

Playback equalizer amplifier
input

O

Center

O

Playback equalizer amplifier
reference

I

Playback equalizer amplifier
input

-

Playback equalizer amplifier
ground

I

Playback equalizer amplifier
input

I

Playback equalizer amplifier
feedback

1-14

BA4905-V3 (IC901) : Regulator

1.Terminal layout

12 34 5678 9101112

2.Block diagram

KS-FX834R

REGULATOR

EXT

RESET

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

RESET COMP VDD 5.7V CD 8V VCC AJ

EXT ACC AUDIO 9V CTRL ILM 10V GND

3.Pin function
Pin no. Symbol Function

1
2

RESET

EXT output

If VDD voltage becomes 4V or less.RESET output becomes low level.
This output voltage is approximately 0.5V lower than VCC. and max
output current is 300mA.

3

COMP output

A voltage supply for ACC block. This output voltage is approximately

0.7V lower than VDD'S. The max output current is 100mA.
4
5

ACC

VDD output

Control of the COMP output by inputting voltage.
This output voltage is 5.7V, and max output current is 100mA.
This voltage supply is for microcomputer. Whenever back up voltage
supply is connected, the output keeps on running.

6

AUDIO output

This output voltage is 9.0v, and max output current is 500mA.
This voltage supply for AUDIO.

7

CD output

This output voltage is 8.0V, and max output current is 1A.

This voltage supply for CD.
8
9

10

CTRL

VCC

ILM output

Output selector of CD. AUDIO, ILM and EXT.

To be connected with the BACK UP of car.

This output voltage is 10V, and max output current is 500mA.

Output voltage is adjustable.

11

AJ

Putting a resistance between ILM and AJ or between AJ and GND

makes ILM output voltage adjustable.

12

GND

Ground.

Overvoltage

protection circuit

37K

5K

1-15

KS-FX834R

UPD178018AGC-551 (IC701) : Main system control CPU

1. Pin layout

80 ~ 61

1

60

2. Pin function
Pin No.

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

~

20

21 ~ 40

~

41

Port Name I/O Descriptions

KEY 0
KEY 1
KEY 2
LEVEL
SM
SQ
LCDCE
LCDDA
LCDSCK
BUSI/O
OPEN
BUSSI
BUSSO
BUSSCK
NC
NC
NC
NC
INLOCK
NC
GNDPORT
VDDPORT
NC
AFCK
MONO
FM/AM
SEEK/STP
NC
IFC
VDDPLL
FMOSC
NC
GNDPLL
AMEO
FMEO
IC
SD/ST
STAGE0
NC
MOTOR

O
O
O

O

I/O

-

-

-

-

-

-

-

­O
O
O
O
O

-

-

­O
O

-

­O

I
I
I
I
I
I

Key input 0
Key input 1
Key input 2
Level meter input
S.meter level input
S.Quality level input
CE output to LCD driver
Data output to LCD driver

Clock output to LCD driver
I
I
I

I/O selector output for J-BUS, H : OUT, L: INPUT

Door open detect input

J-BUS Data input

J-BUS Data output

J-BUS Clock in/output

Non connect

Non connect

Non connect

Non connect

Non connect

Non connect

Port GND

Port Vdd

Non connect

AF check output, L: AF check

Monaural on /off selecting output, H:mono on

FM/AM switching output L : FM H : AM

Auto seek /stop selecting output, H: Seek, L:Stop
I
I

Pulse signal input port for Cruise control

FM/AM midle frequency counter input

PLL Vdd
I

FM/AM limited generator frequency input

None connect

PLL GND

AM error out output

FM error out output

GND
I
I

Station detector, Stereo signal input, H:Find Station, L:Stereo

Pull up

Non connect

Main motor output

1-16

UPD178018AGC-551

KS-FX834R

Pin No.

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

Port Name I/O Descriptions

FF/REW
F/R
DOLBY
MSIN
I2CCLK
I2CDAO
I2CDAI
REEL
SUBMO1
SUBMO2
MODE
TAPEIN
STANDBY
NC
NC
NC
NC
NC
BEEP
MUTE
PCNT
TELMUTE
DIMIN
DIMOUT
ENC1
ENC2
ACCDET
POWER
RDSSCK
RDSDA
REMOCON
DETACH
J-BUSINT
REGCPU
GND
X2
X1
REGOSC
VDD
RESET

I
O
O

I
O
O

I
O

I
O
O
O

I

-

-

-

-

­O
O
O

I
I

O

I
I
I

O

I
I
I
I
I

-

-

-

I

-

-

-

Output for input signal level switching for MS L : FF,REW H : PLAY
FWD,REV running direction switch signal input
Dolby on "H" output
MS input
I2C information clock output
I2C information data output
I2C information clock input
Switch for detecting tape end position
Sub motor clock direction input
Sub motor clock opposite detection drive output
Mechanism mode position detection input
Cassette in detection input H : cassette in L : cassette out
Standby position detection input H : eject side L : operation side
Non connect
Non connect
Non connect
Non connect
Non connect
Touch tone output
Mute output , L : mute on
Power ON /OFF switching output , H : power on
Telephone mute signal detection input
Dimmer signal detection input L : dimmer
Dimmer control output , Dimmer off L output
Rotary volume signal 1 input Power save : L
Rotary volume signal 2 input
Power save 1 Working together ACC Power save : L
Power save 2, Working together Back up by H input, stop mode
Clock input for RDS
RDS data input
Remocom input
Detach signal input H : Power save
Cut-in input for J-BUS signal
Regulator for CPU power supply, Connect the GND with0.1 F.
Ground
Connecting the crystal oscillator for system clock
Connecting the crystal oscillator for system clock
Regulator for oscillator circuit.Connect the GND with 0.1 F.
Vdd
Pull up

1-17

KS-FX834R

HA13158A (IC301) : Power amp

1. Pin layout

1 ~ 23

2. Block diagram

INVCC

IN1

2

STBY

1

14 18 6

PVCC1PVCC2

INPUTBUFFER1

AMP1

+

3

4

-

5

IN2

IN3

IN4

11

13

23

10

MUTE

INPUTBUFFER2

INPUTBUFFER3

INPUTBUFFER4

PROTECTOR (ASO
SURGE, TSD)

12 22

AMP2

AMP3

AMP4

TA B

7

+

8

-

9

15

+

16

-

17

19

+

20

-

21

1-18

HD74HC126FP-X (IC801) : Buffer

KS-FX834R

1. Pin layout

1
2
3
4
5
6
7

3. Block diagram

Input

14
13
12
11
10

9
8

Vcc Vcc

1A
2A
3A
4A
1C
2C
3C

See Function Table

4C

2. Function

Output

1Y

2Y

Output

2Y

Output

3Y

Output

4Y

Inputs Outputs
C

A

L

X

H

L

H

H

1k

CL

Sample as Load Circuit 1

Sample as Load Circuit 1

Sample as Load Circuit 1

Y
Z
H
L

1k

S1

1-19

KS-FX834R

RPM6938-SV4 (IC602) : Remote control receiver

AMP

I/V
conversion

PD

magnetic shield

LB1641 (IC402) : DC Motor Driver

1. Pin Layout

1 2 3 4 5 6 7 8 9

GND OUT1 P1

VZ IN1 IN2

VCC1

VCC2 P2

BPF

for
trimming
circuit

OUT2

AGC

2. Pin Functions

10

Vcc

Comp

Detector

Input Output

IN1 IN2 OUT1 OUT2

0 0 0 0
1 0 1 0
0 1 0 1
1 1 0 0

22k
ohm

Vcc

Rout

GND

Mode

Brake

CLOCKWISE

COUNTER-CLOCKWISE

Brake

1-20

LC75873NW (IC601) : LCD Driver

1.Block Diagram

COM3

COM2

COM1

S68

S67

S5

S4/P4

S3/P3

S2/P2

S1/P1

KS-FX834R

VDD1

VDD2

INH

OSC

VDD

VSS

COMMOM

DRIVER

CLOCK
GENERATOR

SEGMENT DRIVER

SHIFT REGISTER

ADDRESS

DETECTOR

2.Pin Functions

Pin No. Symbol Description

1~66

67~69

70
71

S3~S68

COM1~3

VDD

VDD1

I/O

Segment Output.

O

Common Driver Output.

O

Power Supply Connection.

­Used for applying the LCD drive 2/3 bias voltage externally.

I

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

72

VDD2

Used for applying the LCD drive 1/3 bias voltage externally.

I

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

73
74

VSS
OSC

Power supply connection.

­Oscillator connection. An oscillator circuit is formed by connecting an

I/O

external resistor and capacitor to this pin.

75
76
77
78
79
80

INH

CE

CLOCK

DI

DIMMER

NC

Display off control input.

I

Chip enable input.

I

Synchronization clock input.

I

Serial data input.

I

DIMMER Control signal output.

O

Non connect.

-

1-21

KS-FX834R

SAA6579T-X (IC71) : RDS demodulator

1. Pin layout 2. Pin function

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10

9

Pin

Symbol Function

No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16

QUAL
RDDA

Vref

MUX

VDDA

VSSA

CIN

SCOUT

MODE

TEST
VSSD
VDDD

OSCI

OSCO

T57

RDCL

Quality indication output
RDS data output
Reference voltage output (0.5VDDA)
Multiplex signal input
+5V supply voltage for analog part
Ground for analog part (0V)
Sub carrier input to comparator
Sub carrier output of reconstruction filter
Oscillator mode / test control input
Test enable input
Ground for digital part (0V)
+5V supply voltage for digital part
Oscillator input
Oscillator output
57kHz clock signal output
RDS clock output

3. Block diagram

CIN

Vref

4

8

7

5

3

MUX

SCOUT

VDDA

ANTI-

ALIASING

FILTER

CLOCKED

COMPARATOR

Vp1

REFERENCE

VOLTAGE

6

57kHz

BAND PASS

(8th ORDER)

COSTAS LOOP
VARIABLE AND
FIXED DIVIDER

CLOCK

REGENERATION

AND SYNC

RECONSTRUCTION

FILTER

TEST LOGIC AND OUTPUT

OSCI OSCO VDDD

13 14 12

OSCILLATOR

AND

DIVIDER

BIPHASE

SYMBOL

DECODER

SELECTOR SWITCH

91011

QUALITY BIT

GENERATOR

DIFFERENTIAL

DECODER

VSDDTESTMODEVSSA

16

15

1

2

QUAL

RDDA

RDCL

T57

1-22

TEA6320T-X (IC161) : E.volume

1.Pin Layout

2.Block Diagram

10 8 9 7 6

KS-FX834R

5

12

SDA

1

GND

2

OUTLR

OUTLF

MUTE

TL
B2L
B1L

IVL
ILL

QSL

IDL

ICL

IMD

IBL
IAL

3
4
5
6
7
8

9
10
11
12
13
14
15
16

3.Pin Functions

Pin

Symbol

No.

SDA

1

SCL

32

VCC

31

OUTRR

30

OUTRF

29

TR

28

B2R

27

B1R

26

IVR

25

ILR

24

QSR

23

IDR

22

Vref

21

ICR

CD-CH

TAPE

TUNER

20
19
18
17

CAP
IBR
IAR

I/O

Serial data input/output.

I/O

MUTE

21
31

2

19

16
15
13
11

14

22
20
18
17

Functions Functions

POWER
SUPPLY

SOURCE

SELECTOR

23 25 24 26 27 28

VOLUME 1

+20 to -31 dB

LOUDNESS

LEFT

VOLUME 1

+20 to -31 dB

LOUDNESS

RIGHT

Pin
No.

17

Symbol

IAR

BASS
LEFT

+15 dB

LOGIC

BASS
RIGHT
+15 dB

I/O

I

Input A right source.

TREBLE

LEFT

+12 dB

TREBLE

RIGHT
+12 dB

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

3

4

32

1

29

30

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

GND

OUTLR

OUTLF

TL

B2L

B1L

IVL

ILL

QSL

IDL

MUTE

ICL

IMO

IBL

IAL

Ground.

-

output left rear.

O

output left front.

O

Treble control capacitor left channel or

I

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.

I

Input loudness. left control part.

I

Output source selector. left channel.

O

Not used

-

Not used

-

Input C left source.

I

Not used

-

Input B left source.

I

Input A left source.

I

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

IBR

CAP

ICR

Vref

IDR

QSR

ILR

IVR

B1R

B2R

TR

OUTRF

OUTRR

Vcc

SCL

I

Input B right source.

-

Electronic filtering for supply.

I

Input C right source.

-

Reference voltage (0.5Vcc)

-

Not used

O

Output source selector right channel.

I

Input loudness right channel.

I

Input volume 1. right control part.

-

Bass control capacitor right channel
Bass control capacitor right channel or

O

output to an external equalizer.
Treble control capacitor right channel or

I

input from an external equalizer.

O

Output right front.

O

Output right rear.

-

Supply voltage.

I

Serial clock input.

1-23

KS-FX834R

VICTOR COMPANY OF JAPAN, LIMITED

MOBILE ELECTRONICS DIVISION
PERSONAL & MOBILE NETWORK B.U. 10-1,1Chome,Ohwatari-machi,Maebashi-city,Japan

(No.49571)

Printed in Japan
200009(V)