JVC KS-LH6R Service Manual

SERVICE MANUAL

CASSETTE RECEIVER

KS-LH6R

SOUND

6

U

SOURCE

F

R

D

VOL

VOL

TAPE

S

KS-LH6R

Contents

Safety precaution
Disassembly method
Adjustment method
Description of major ICs

COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.

Area Suffix

E ----------- Continental Europe

1- 2
1- 3
1-11
1-15~26

No.49734

Apr. 2002

KS-LH6R

Safety precaution

!

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-LH6R

Front panel unit

Removing the bottom cover

(See Fig.2,3)

1.

Turn the body upside down.

2.

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

CAUTION:

When disengaging the joint c using a
screwdriver, do not damage or break the
board.

Removing the front chassis (See Fig.4,5)

Prior to performing the following procedure, remove
the bottom cover.

1.

Remove the two screws A attaching the front
chassis.

Fig.1

Joint a

Bottom cover

Joint c

Joint b

Fig. 2

Joint b

Bottom cover

2.

Remove the two screws B on each side of the body.

3.

Release the two joints d and the two joints e on the
sides. remove the front chassis toward the front.

Joint d

Joint d

B

Front chassis

Fig. 5

Joint e

Joint e

Joint a

A

Joint c

Fig. 3

Front chassis

Fig.4

1-3

KS-LH6R

Removing the heat sink (See Fig.6)

1.

Remove the four screws C attaching the heat sink
on the left side of the body, and remove the heat
sink.

Removing the rear panel (See Fig.7 )

C

C

Heat sink

Fig. 6

C

Prior to performing the following procedure, remove
the front chassis, the heat sink and bottom cover.

1.

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

D

Rear panel

Removing the main amplifier board assembly

(See Fig.8)

Prior to performing the following procedure, remove
the front chassis, the heat sink, bottom cover and the
rear panel.

F

E

D

D

Fig. 7

F

1.

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

2.

Disconnect connector CP401 on the main amplifier
board assembly from the cassette mechanism
assembly.

1-4

Main board assembly

Fig. 8

CP401

KS-LH6R

Removing the cassette mechanism assembly

Cassette mechanism assembly

(See Fig.9)

Prior to performing the following procedure, remove
the front chassis, the heat sink, bottom cover and the
main amplifier board assembly.

1.

Remove the four screws G attaching the cassette
mechanism assembly from the top cover.

G

G

H

Removing the (LCD & key) control switch

board (See Fig.10

Prior to performing the following procedure, remove
the front panel assembly.

~ 12)

G

G

Top cover

Fig. 9

H

1.

Remove the four screws H attaching the rear cover
on the back of the front panel assembly.

2.

Unjoint the nine joints g with the front panel and the
rear cover.

3.

Remove the control switch board on the back of the
front panel.

H

Front panel

Joint g

LCD & Key control board

Joint g

H

Fig. 10

Rear cover

Joint g

Joint g

Fig. 11

Fig. 12

1-5

KS-LH6R

<Cassette mechanism section>

REFERENCE:

Prior to performing the following
procedures, turn the mode gear on the
bottom of the body until the respective part
comes to the EJECT position (Refer to
Fig.1).

Removing the reinforce bracket

(See Fig.1 and 2)

1.

Remove the screw A attaching the reinforce bracket
on the bottom of the body.

2.

To release joint a, turn and detach the reinforce
bracket from the side bracket assembly as shown in
Fig.2

Removing the cassette guide (See Fig.3)

1.

Turn the mode gear to set to RVS play or
subsequent mode.

2.

Remove the cassette guide from the main chassis
while releasing each two joint tabs b in the direction
of the arrow.

Mode gear

Reinforce bracket

A

Fig.1

Joint a

Reinforce bracket

Removing the head board (See Fig.4)

1.

Remove the screw B on the upper side. Unsolder
the wires on the under side of the head board, if
necessary.

REFERENCE:

Cassette guide

When reassembling, twist the wires by
turning the head board twice remarked c
and pass through the notch d as shown
in Fig.4.

Head board

B

Fig.2

Head board

Soldering

notch d

1-6

Tab b

Tab b

c

Fig.4Fig.3

KS-LH6R

y

Removing the load arm (See Fig.5)

1.

Remove the E-washer attaching the load arm.

2.

Move the load arm in the direction of the arrow and
release the joint e on the cassette catch.

Removing the cassette hanger assembly /
cassette holder (See Fig.6 to 9)

1.

Check the mode is set to EJECT. Push down the
front part of the cassette holder and move in the
direction of the arrow to release the joint f.

2.

Move the rear part of the cassette hanger assembly
in the direction of the arrow to release it from the two
joint bosses g.

Load arm

E-washer

Cassette holder assembly

Side bracket

Joints f

Joint e

Fig.5

Boss g

Cassette hanger
assembly

Boss g

3.

Release the holder stabilizer spring from the hooks h
and i, then pull out from the cassette hanger
assembly.

4.

Bring up the rear side of the cassette hanger
assembly to release the joint j and k.

5.

Pull out the cassette catch from the cassette hanger
assembly.

Cassette holder
assembly

Cassette holder assembly

Fig.6

Cassette hanger assembl

Cassette stabilizer spring

Hook i

Hook h

Fig.7

Cassette hanger assembly

Cassette catch

Cassette holder assembly

Hook j

Fig.8

Cassette hanger assembly

Hook k

Fig.9

1-7

KS-LH6R

Removing the side bracket assembly

(See Fig.10 to 12)

1.

Remove the screw C attaching the side bracket
assembly.

2.

Detach the front side of the side bracket assembly
upward and pull out forward to release the joint l and
m in the rear.

CAUTION:

CAUTION:

When reassembling, make sure that the
boss n of the main chassis is set in the
notch of the load rack under the side
bracket assembly. Do not reattach the
load rack on the boss n.

After reattaching the side bracket
assembly, confirm operation.

Side bracket assembly

Joint l

Joint m

C

Side bracket assembly

Fig.10

Side bracket assembly

Joint l

Joint m

Load rack

Load rack

Boss n

Boss n

Fig.11

1-8

Fig.12

Removing the pinch arm (F) assembly

(See Fig.13 and 14)

1.

Remove the polywasher and pull out the pinch arm
(F) assembly.

2.

Remove the compulsion spring.

Removing the pinch arm (R) assembly

(See Fig.13 and 15)

1.

Remove the polywasher and pull out the pinch arm
(R) assembly.

Removing the slide chassis assembly

(See Fig.16 and 17)

Polywasher

Polywasher

Compulsion spring

Pinch arm
(R) assembly

Fig.13

Pinch arm
(F) assembly

Pinch arm (F) assembly

Polywasher

KS-LH6R

REFERENCE:

It is not necessary to remove the head
and the tape guide.

1.

Move the slide chassis assembly in the direction of
the arrow to release the two joints o and remove
from the main chassis.

2.

Remove the rack link.

CAUTION:

When reassembling, first reattach the rack
link, and next fit the boss p and hook q of
the slide chassis assembly to the hole of the
main chassis, and engage the two joints o.

Rack link

Fig.14

Boss p

Pinch arm
(R) assembly

Fig.15

Head

Hook q

Polywasher

Tape guide

Joint o

Slide chassis assembly

Fig.16

Joint o

Fig.17

1-9

KS-LH6R

Removing the head / tape guide

(See Fig.18 and 19)

REFERENCE:

1.

Remove the band attaching the wire to the head.

2.

Remove the two screws D, the head and the head
support spring.

3.

Remove the pinch arm spring from the tape guide.

4.

Remove the tape guide and the pinch spring arm.

CAUTION:

CAUTION:

It is not necessary to remove the slide
chassis assembly.

When reattaching the pinch arm spring, set
both end of it to the pinch spring arm (
remarked r).

When reattaching the head, set the wires
into the groove of the tape guide (Fig.18).

D

Slide chassis assembly

Head

Tape guide

Fig.18

D

Pinch arm spring

Head

Head support spring

Tape guide

Removing the flywheel assembly (F) & (R)

(See Fig.20 and 21)

REFERENCE:

1.

Remove the belt at the bottom.

2.

Remove the two polywashers on the upper side.

3.

Pull out each flywheel assembly downward.

Flywheel assembly (F)

It is not necessary to remove the slide
chassis assembly.

Belt

r

Pinch spring arm

r

Slid chassis assembly

Fig.19

Polywasher

Polywasher

Flywheel assembly (R)

1-10

Fig.20

Flywheel assembly (F)

Fig.21

Flywheel assembly (R)

Disassembling the flywheel assembly (F)

(See Fig.22 and 23)

1.

Push and turn counterclockwise the spring holder (F)
to release the three joints s on the bottom of the
flywheel.

2.

The spring holder (F), the TU spring and the friction
gear play come off.

3.

Remove the polywasher and felt.

Flywheel assembly (F)

Joints s

KS-LH6R

Flywheel assembly (R)

Joints t

Disassembling the flywheel assembly (R)

(See Fig.22 and 24)

1.

Push and turn clockwise the spring holder (R) to
release the three joints t on the bottom of the
flywheel.

2.

The spring holder (R), the FF spring and the friction
gear FF come off.

3.

Remove the polywasher and the felt.

Removing the reel board

(See Fig.25 and 26)

1.

Remove the two screws E attaching the reel board.

2.

Move the reel board in the direction of the arrow to
release the joint u.

3.

Unsolder the wires if necessary.

CAUTION:

When reattaching, confirm operation of
the MODE switch and the ST-BY switch.

The mode position between EJECT and
ST-BY is optimum for reattaching.

Joint s

Fig.22

Polywasher

Polywasher

Spring holder (R)

Spring holder (F)

TU spring

Friction gear FF

Friction gear play

Felt

Flywheel assembly (F)

FF spring

Felt

Flywheel assembly (R)

Fig.23 Fig.24

Joint t

Connect the card wire extending from
the reel board to the FFC pad before
reattaching the reel board.

FFC pad

E

Reel board

E

Fig.25

Joint u

FFC pad

CT-1 switch

MODE switch

Soldering

ST-BY switch

Fig.26

1-11

KS-LH6R

Removing the gear base arm / gear base
link assembly (See Fig.27 to 29)

1.

Move the gear base arm in the direction of the arrow.

2.

Insert a slotted screwdriver to the gear base spring
under the gear base arm, and release the gear base
arm upward from the boss on the gear base
assembly.

3.

Remove the gear base arm from the main chassis
while releasing the two joints v.

4.

Move the gear base link assemby in the direction of
the arrow to release the two joints w.

REFERENCE:

When reattaching the gear base arm,
make sure that the boss on the gear
base assembly is inside the gear base
spring.

Removing the FFC pad

(See Fig.27 and 29)

Gear base
link assembly

Gear base spring

Joint w

Gear base arm

Joints v

Hook x

FFC pad

Hook x

Joint w

Fig.27

Gear base arm

Screwdriver

1.

Push each joint hook x of the FFC pad and remove
toward the bottom.

Gear base link assembly

Fig.28

Gear base arm

1-12

FFC pad

Fig.29

KS-LH6R

Removing the mode gear

(See Fig.30 and 33)

1.

Remove the polywasher on the bottom and pull out
the mode gear.

Removing the mode switch actuator

(See Fig.30, 31 and 33)

1.

Pull out the mode switch actuator at the bottom.

REFERENCE:

When reattaching the mode switch
actuator to the main chassis, make sure to
set on the shaft and insert y into the slot z.

Removing the direction link / direction
plate (See Fig.31 to 33)

1.

Remove the polywasher attaching the direction link.

2.

Bring up the direction link to release the three joints
a’, b’ and c’ at a time.

3.

Move the direction plate in the direction of the arrow
to release the two joints d’.

REFERENCE:

When reattaching the direction plate,
engage the two joints d’ and move in the
direction of the arrow (See Fig.32).

Mode switch actuator

Direction plate

Direction link

Fig.30

Direction plate

Joints d'

Joint c'

Direction link

Slot z

Joint b'

Polywasher

Fig.31

Direction plate Mode rack assembly

Joint k'

Mode gear

Polywasher

Mode rack assembly

Joint a'

Joint k'

Joint l'

REFERENCE:

When reattaching the direction link,
move the direction plate in the direction
of the arrow and engage the three joint

a’, b’ and c’ at a time (See Fig.33).

Removing the mode rack assembly

(See Fig.31 and 32)

1.

Move the mode rack assembly in the direction of the
arrow to release the two joints k’ and the joint l’.

REFERENCE:

When reattaching, set the two k’ on the
bottom of the mode rack assembly into the
slots of the main chassis and move in the
direction of the arrow (See Fig.32).

Joints d'

Fig.32

Direction link

Mode switch actuator

Polywasher

y

Mode gear

Direction plate

Mode rack assembly

Fig.33

1-13

KS-LH6R

Removing the gear base assembly / take
up gear / reflector gear (See Fig.34 to 36)

1.

Push in the pin e’ of the gear base assembly on the
upper side of the body and move the reflector gear
toward the bottom, then pull out.

2.

Remove the polywasher on the bottom and pull out
the take up gear.

3.

Move the gear base assembly in the direction of the
arrow to release it from the two slots f’ of the main
chassis.

REFERENCE:

The parts are damaged when removed.
Please replace with new ones.

Gear base assembly

Pin e'

Polywasher

Slot f'

Slot f'

Fig.34

Take up gear

Removing the reel driver / reel spindle

(See Fig.36)

1.

Draw out the reel driver from the shaft on the main
chassis and remove the reel driver spring and the
reel spindle respectively.

CAUTION:

The reel driver is damaged when
removed. Please replace with a new
one.

Reflector gear

Reel driver

Reel driver spring

Reel spindle

Main chassis

Fig.35

Reel driver

Reel driver spring

Reel spindle

Gear base assembly

Slots f’

Take up gear

1-14

Reflector gear

Polywasher

Fig.36

Removing the side bracket assembly

(See Fig.37 to 41)

1.

Remove the eject cam plate spring.

2.

Push the joint g‘ through the slot to remove the load
rack downward.

3.

Move the eject cam limiter in the direction of the
arrow to release it from the boss h’ of the side
bracket assembly and from the two joints i’.

4.

Move the eject cam plate in the direction of the arrow
to release the joint j’.

KS-LH6R

Joint g'

CAUTION:

Joint i'

When reassembling, confirm operation of
each part before reattaching the eject cam
plate spring.

Side bracket assembly

Boss h'

Eject cam limiter

Side bracket assembly

Joint i'

Joint g'

Eject cam plate spring

Joint i'

Load rack

Fig.37

Boss h'

Eject cam limiter

Eject cam plate

Fig.39

Joint i'

Fig.38

Side bracket assembly

Boss h'

Eject cam plate

Fig.40

Load rack

Joint j'

Side bracket assembly

Eject cam plate

Joint j'

Fig.41

1-15

KS-LH6R

Removing the main motor assembly /
sub motor assembly (See Fig.42 to 44)

1.

Remove the belt at the bottom.

2.

Remove the polywasher and pull out the mode gear.

3.

Pull out the reduction gear (B).

4.

Remove the polywasher and pull out the reduction
gear (A).

5.

Remove the two screws F attaching the main motor
assembly.

6.

Remove the two screws G attaching the sub motor
assembly.

7.

Unsolder the wires on the reel board if necessary.

CAUTION:

When reassembling, adjust the length of the
wires extending from the sub motor
asswmbly by attaching them to the side of
the sub motor assembly with the wires
extending from the main motor assembly
using a spacer.

Belt

Reduction gear (B)

Reduction gear (B)

G

Polywasher

Fig.42

F

G

Mode gear

Polywasher

Reduction gear (A)

F

Main motor
assembly

Reduction
gear (A)

Polywasher

Sub motor
assembly

Spacer

Main motor assembly

Sub motor assembly

Main motor assembly

Sub motor assembly

Fig.43

Spacer

Fig.44

1-16

Adjustment method

KS-LH6R

Test Instruments reqired for adjustment

1.Digital osclloscope(100MHz)

2.Frequency Counter meter

3.Electric voltmeter

4.Wow & flutter meter

5.Test Tapes

VT724

VT739
VT712
VT703

6.Torque gauge

Measuring conditions(Amplifier section)

Power supply voltage

Load impedance

Line out

For playback frequency measurement

For wow flutter & tape speed measurement

for DOLBY level measurement

For head azimuth measurement

Cassette type for CTG-N
(mechanism adjustment)

4 (2Speakers connection)

DC14.4V(10.5~16V)

20k

Frequency Range

FM : 87.5 MHz to 108.0 MHz

AM :(MW) 522 kHz to 1620 kHz
(LW) 144kHz to 279 kHz

DUMMY LOAD

Exclusive dummy load should be used for AM
and FM dummy load,there is a loss of 6dB
between SSG output and antenna input. The
loss of 6dB need not be considered since
direct reading of figures are applied in this
working standard.

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 receiving.

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).

Arrangement of Adjusting

Cassette Mechanism Section

Capstan motor

Cassette mechanism
(Surface)

Azimuth screw
(Forward side)

Playback head

Tape speed adjust

Azimuth screw
(Reverse side)

1-17

KS-LH6R

y

Arrangment of adjusting

Head amplifier board section (Reverse side)

VR402:Rch
(Dolby NR level adj)

C413

FSMW1093A

C423

D401

R426

VR402

B409

R425

R411

T11

R424

IC402

R410

R416

Q401

1

B407

R401

C424

B406

D402

C425

C419

C422

B408

C414

C421

B403

C416

R420

Q403

C418

R412

R414

R415

R418

B411

B410

21

R413

R417

C417

B404

2

C415

1

B413

VR401:Rch
(Dolby NR Frequency response adj)

CJ403

11

C412

1

IC401

31

C411

B405

B412

R423

B401

R408

VR401

C410

B402

C409

CJ401

C405

R407

C406

C402

C408

R406

C407

R403

1

R405

C404

R404

C403

R422

C401

R402

2

Q402

1

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 assembl

and main board assembly.

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

Disassembly method

1. Remove the bottom cover.

2. Remove the front panel assembly.

3. Remove the top cover .

4. Install the front panel.

5. Confirm that current is being carried by connecting

an extension cord jig.

Note

Available to connect to the CP701 connector when in-

stalling the front panel.

to Cassette mechanism

Cassette mechanism

Extension cord
EXTKSRT002-18P

1-18

EXTKSRT002-18P

to Main board

Item Adjustment and check method Adjust Spec

1.Tape position

a)

Playback at FWD side, use the mirror tape and
adjuste azimuth screw A and B, check the tape
position at tape guide position of the head.

b)

Playback at REV side, use the mirror tape and
adjuste azimuth screw A and B, check the tape
position at tape guide position of the head.

c)

Playback at FWD and REV both side, check the
tape position at tape guide position at the head.

KS-LH6R

Azimuth
screw A

Azimuth
screw B

2.Head azimuth ajust
and check

a)

Playback at FWD side, adjuste azimuth screw A
to make peak position of Lch /Rch.

*

Oscilloscope wave forme standard is 45 digrees.

b)

Playback at REV side, adjuste azimuth screw B to
make peak position of Lch/Rch.

*

Oscilloscope wave forme standard si 45 digrees.

c)

Chech the level difference of FWD side and REV
side less than 3dB by VTVM.

d)

After operation check, Lch/Rch azimuth output
level difference is less than 1 dB at adjustment
level.

OK

Head

Tape guide

Tape position NG

0

PHASE

45

3.Tape speed
WOW & Flutter

4.Playback frequency
responce

Head

a)

Check the frequency counter and wow flutter
meter are 2940~3090Hz(FWD/REV), less than

0.35%(RMS).

b)

If tape speed is not clear the specification, adjust
the v.resistor inside of motor.

a)

Playback the test tape(VT724:1kHz), spreaker
output set to 2V by set volume.
Playback the test tape(VT739), check level differe

b)

to 0 3dB at 1kHz/10kHz, -4dB 2dB at
1kHz/63Hz.
10kHz level is not clear the specification, readjust
the head azimuth.

Tape

Internal
v.resistor

Tape speed
2940~3090Hz
WOW & Flutter
less than 0.35%
(RMS)

Speaker output
1kHZ/10kHz
:0 3dB
1kHZ/63Hz
:-4 2dB

1-19

KS-LH6R

Description of major ICs

HA13164A (IC901) : Regulator

1.Terminal layout

123456789101112131415

2.Block diagram

ANT OUT

C3

0.1u

EXT OUT

C4

0.1u

ANT CTRL

CTRL

CD OUT

C5

0.1u

AUDIO OUT

C6

10u

11

12

10

BATT.DET OUT

9

COMPOUT

6

VDD OUT

4

SW5VOUT

5

14

UNIT R:

+B

ACC

ILMOUT

R1

C7

0.1u

C8

0.1u

C1

100u

VCC ACC

8

2

1

7

Surge Protector

BIAS TSD

15

3

TA B

note1) TAB (header of IC)

connected to GND

ILM AJGND GND

13

C2

0.1u

C:F

1-20

3.Pin function

Pin No. Symbol Function

1
2

EXTOUT
ANTOUT

Output voltage is VCC-1 V when M or H level applied to CTRL pin.
Output voltage is VCC-1 V when M or H level to CTRL pin and H level

to ANT-CTRL.
3
4
5
6
7
8
9

10
11
12
13
14
15

ACCIN
VDDOUT
SW5VOUT
COMPOUT
ANT CTRL
VCC
BATT DET
AUDIO OUT
CTRL
CD OUT
ILM AJ
ILM OUT
GND

Connected to ACC.

Regular 5.7V.

Output voltage is 5V when M or H level applied to CTRL pin.

Output for ACC detector.

L:ANT output OFF , H:ANT output ON

Connected to VCC.

Low battery detect.

Output voltage is 9V when M or H level applied to CTRL pin.

L:BIAS OFF, M:BIAS ON, H:CD ON

Output voltage is 8V when H level applied to CTRL pin.

Adjustment pin for ILM output voltage.

Output voltage is 10V when M or H level applied to CTRL pin.

Connected to GND.

HD74HC126FP-X (IC801) : Buffer

KS-LH6R

1.Terminal layout

1C

1

1A

2

1Y

3

2C

4

2A

5

2Y

6

GND

7

2.Block diagram

Input

VU

14

4C

13

4A

12

4Y

11

3C

10

3A

9

3Y

8

Vcc Vcc

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

See Function Table

4C

3.Pin function

Output

1Y

2Y

Output

2Y

Output

3Y

Output

4Y

Input

C
L
H
H

A
X
L
H

Output

Y
Z
H
L

Note) H:High level

L:Low level
X:Irrelevant
Z:Off(High-impedance)
State a 3-state input

1k

S1

CL

1k

Sample as Load Circuit 1

Sample as Load Circuit 1

Sample as Load Circuit 1

Note) CL includes probe and jig capacitance

1-21

KS-LH6R

UPD178018AGC621 (IC701) : CPU

1. Pin layout

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

80 ~ 61

1

~

20

21 ~ 40

60

~

41

Port Name I/O Descriptions

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

I
I
I
I
I

I
O
O
O

I

I

I
O

I/O

-

-

-

-

-

-

-

-

­O
O
O
O

-

I

-

I

-

­O
O

-

I
I

­O

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/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
Por t 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
Non connect
FM/AM midle frequency counter input
PLL Vdd
FM/AM limited generator frequency input
None connect
PLL GND
AM error out output
FM error out output
GND
Station detector, Stereo signal input, H:Find Station, L:Stereo
Pull up
Non connect
Main motor output

1-22

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

I2CSCK

I2CDAO

I2CDAI

REEL

SUBMO1

SUBMO2

MODE

TAPEIN

STANDBY

NC

NC

NC

NC

NC

BEEP

MUTE

PCNT

TELMUTE

DIMIN

DIMOUT

ENC2

ENC1

ACCDET

MEMDET

RDSCK

RDSDA

REMOCON

DETACH

J-BUSINT

REGCPU

GND

X2

X1

REGOSC

VDD

RESET

I

O

O

I

I/O

O

I

O

I

O

O

O

I

-

-

-

-

-

O

O

O

I

I

O

I

I

I

I

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

E-VOL IC control data I/O

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 2 input

Rotary volume signal 1 input Power save : L

Power save 1 Working togethe ACC Power save : L

Backup power supply detection terminal

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 with 0.1 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

KS-LH6R

UPD178018AGC621(2/2)

1-23

KS-LH6R

LA47503 (IC301) : Power amp.

1.Terminal layout

206

11

1

12

4

10

Stand by

Switch

Ripple

Filter

Protective

circuit

Mute

circuit

9

7

8

5

3

2

22

1-24

15

25

13

14

16

Muting &

On Time Control

Circuit

protective

circuit

17

19

18

21

23

24

2.Terminal 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

KS-LH6R

NC

3.Pin function

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

SymbolPin No. Function

AC CONT1
GND1
OUTFR­STBY
OUTFR+
Vcc1/2
OUTRR­GND2
OUTRR+
VREF
INRR
INFR
SGND
INFL
INRL
ONTIME
OUTRL+
GND3
OUTRL­Vcc3/4
OUTFL+
MUTE
OUTFL­GND4
NC

Header of IC
Power GND
Outpur(-) for front Rch
Stand by input
Output (+) for front Rch
Power input
Output (-) for rear Rch
Power GND
Output (+) for rear Rch
Ripple filter
Rear Rch input
Front Rch input
Signal GND
Front Lch input
Rear Lch input
Power on time control
Output (+) for rear Lch
Power GND
Output (-) for rear Lch
Power input
Output (+) for front
Muting control input
Output (-) for front
Power GND
No connection

LA47503

1-25

KS-LH6R

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

1.Pin layout & block diagram

PBTC2

30 29 28

PBFB2

PBRIN2

PBGND

PBFIN2

VCT

PBREF

PBFIN1

PBGND

PBRIN1

PBFB1

2. Pin function

7k/12k

31

32

300k

33

F2

34

30k

35

45k

36

30k

37

F1

38

300k

39

7k/12k

40

12345

PBTC1

PBOUT2

­+

+

-

PBOUT1

OUTREF2

27

70 /120

1

1

70 /120

OUTREF1

TAPEIN2

100k

100k

TAPEIN1

TCH2

23 22 21

NR

OFF/B

MS MODE

NR MODE

DET

OFF/B

-

NR

8910

TCH1

NC

MS ON/

NC

OFF

MSSW

MSLPF

20

19

18

17

16

15

14

13

12

11

MSMODE

DRSW

TAPESW

MUTESW

NRSW

NC

MSOUT

MSTC

G1FB

G2FB

LINEOUT2

DIREF

GND

26

24

25

+

-

T2

BIAS

MUTE

TAPE EQ

FWD/RVS

Vcc

LPF

+

-

T1

F3

+

6

7

NC

Vcc

LINEOUT1

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

1-26

LC75873NW (IC601) : LCD driver

KS-LH6R

1.Pin layout

60 41

61

80

1 20

3.Pin function

Pin No.

79,80
1,2,3
to 66

67
78
69

2.Block diagram

40

21

Pin name

S1/P1 TO S4/P4
S5 to S68

COM1
COM2
COM3

VDD1

VDD2

INH

OSC

VDD

VSS

I/O

O

O

S5

S4/P4

S3/P3

S2/P2

COM2

COM3

COMON
DRIVER

CLOCK

GENERATOR

COM1

S68

S67

DI

CL

SEGMENT DRIVER

SHIFT REGISTOR

ADDRESS

DETECTOR

CE

S1/P1

Description

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.

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

74

76
77
78

75

71

72

70

OSC

CE
CL
DI

INH

VDD1

VDD2

VDD

I/O

I
I
I

I

I

I

-

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

Serial data transfer inputs.
Connected to the controller.
CE:Chip enable
CL:Synchronization clock
DI:Transfer data

Display off control input
INH= "L"(VSS) Display forced off

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"

INH = "H"(HDD) Display on
However, serial data transfer is possible when
the display is forced off by this pin.

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.
Provide a voltage of between 3.0 and 6.0V.

73

VSS

-

Power supply connection. Connect to ground.

1-27

KS-LH6R

SAA6579T-X (IC71) : RDS

1.Pin layout

QUAL

1

RDDA

2

Vref

3

MUX

4

V

ODA

5

V

SSA

6

CIN

7

SCOUT

8

2.Block diagram

RDCL

16

T57

15

OSCO

14

OSCI

13

0DD

V

12

V

SSD

11

TEST

10

MODE

9

121413

3.Pin function

4

8

7

CLOCKED
COMPARATOR

5

3

REFERENCE
VOLTAGE

Pin No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

ANTI­ALIASING
FILTER

6 11

Symbol

VP1

QUAL

RDDA

Vref

MUX

VDDA

VSSA

CIN

SCOUT

MODE

TEST

VSSD

VDDD

OSCI

OSCO

T57

RDCL

57 kHz
BANDPASS
(8th ORDER)

COSTAS LOOP
VARIABLE AND
FIXED DIVIDER

CLOCK
REGERATION
AND SYNC

Quality indication output

RDS data output

Reference voltage output (0.5VDDA)

Multiolex signal input

+5V supply voltage for analog part

Ground for analog part (0V)

Subcarrier input to comparator

Subcarrier output of reconstruction filter

Oscllator mode / test control input

Test enable input

Ground for digital part (0V)

+5V supply voltage for digital part

Oscillator input

Oscillator output

57 kHz clock signal output

RDS clock output

RECONSTRUCTION
FILTER

TEST LOGIC AND OUTPUT
SELECTOR SWITCH

Description

OSCILATOR
AND
DIVIDER

BIPHASE
SYMBOL
DECODER

910

QUALITY BIT
GENERATOR

DIFFERENTIAL
DECODER

1

2

15

15

1-28

TEA6320T-X (IC301) : E.VOLUME

KS-LH6R

1.Terminal Layout

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

CD-CH

TAPE

TUNER

3.Pin Functions

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

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

2.Block Diagram

10 8 9 7 6

21
31

2

19

16
15
13
11

14

22
20
18
17

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

BASS
LEFT

+15 dB

LOGIC

BASS

RIGHT

+15 dB

5

TREBLE

LEFT

+12 dB

TREBLE

RIGHT
+12 dB

12

MUTE

FUNCTION

ZERO CROSS

DETECTOR

VOLUM E 2

0 to 55 dB

BALANCE

FENDER REAR

VOLUM E 2

0 to 55 dB

BALANCE

FENDER FRONT

HC BUS

REC

VOLUM E 2

0 to -55dB

BALANCE

FENDER FRONT

VOLUM E 2

0 to -55dB

BALANCE

FENDER REAR

3

4

32

1

29

30

Pin
No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Symbol

SDA

GND

OUTLR

OUTLF

TL

B2L

B1L

IVL

ILL

QSL

IDL

MUTE

ICL

IMO

I/O

Serial data input/output.

I/O

Ground.

-

output left rear.

O

output left front.

O

Treble control capacitor left channel or

I

input from an external equalizer.
Bass control capacitor leftchannel 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

-

Functions Functions

Pin
No.

17

18

19

20

21

22

23

24

25

26

27

28

29

30

Symbol

IAR

IBR

CAP

ICR

Vref

IDR

QSR

ILR

IVR

B1R

B2R

TR

OUTRF

OUTRR

I/O

I

Input A right source.

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.

15

16

IBL

IAL

Input B left source.

I

Input A left source.

I

31

32

Vcc

SCL

-

Supply voltage.

I

Serial clock input.

1-29

KS-LH6R

GP1UM261XK (IC602) : Receiver

1. Pin layout

Vout

GND

Vcc

2. Block diagram

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

10

OUT2

B.P.F.LimiterAmp

Demodulator

2. Pin function

Input Output

IN1 IN2 OUT1 OUT2

0 0 0 0

1 0 1 0

0 1 0 1

1 1 0 0

Integrator

Comparator

GND Vdd Vout

Mode

Brake

CLOCKWISE

COUNTER-CLOCKWISE

Brake

1-30

< MEMO >

KS-LH6R

1-31

KS-LH6R

VICTOR COMPANY OF JAPAN, LIMITED

MOBILE ELECTRONICS DIVISION
PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.49734)

200204