JVC KD-S747, KD-SX747 Service Manual

49822200303

KD-S747

SERVICE MANUAL

CD RECEIVER

KD-S747

COMPACT

DIGITAL AUDIO

EE --------- Russian Fedeation

Area Suffix

TABLE OF CONTENTS

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

2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

3 Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

4 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.

No.49822

2003/03

KD-S747

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.

Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.

1-2 (No.49822)

1.2 Preventing static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,
can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

1.2.1 Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.
Be careful to use proper grounding in the area where repairs are being performed.

(1) Ground the workbench

Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.

(2) Ground yourself

Use an anti-static wrist strap to release any static electricity built up in your body.

(caption)
Anti-static wrist strap

KD-S747

1M

Conductive material
(conductive sheet) or iron plate

(3) Handling the optical pickup

• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)

• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.

1.3 Handling the traverse unit (optical pickup)

(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the

replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long

a time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

1.4 Attention when traverse unit is decomposed

*Please refer to "Disassembly method" in the text for the CD pickup unit.

• Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit.
(If the flexible wire is disconnected without applying solder, the CDpickup may be destroyed by static electricity.)

• In the assembly, be sure to remove solder from the short land after connecting the flexible wire.

Short-circuit point

(Soldering)

Flexible wire

Short-circuit point

Pickup

Pickup

(No.49822)1-3

KD-S747

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 right part of the front

panel assembly and remove the front panel assembly in
the direction of the arrow.

2.1.2 Removing the front chassis assembly
(See Figs.2 and 3)

• Prior to performing the following procedure, remove the front

panel assembly.
(1) Remove the screw A on the both sides of the main body.
(2) Release the two joints a and two joints b on both sides

of the main body using a screwdriver, and remove the front
chassis assembly forward.

SECTION 2

Front panel assembly

Fig.1

Detach button

a

Joint

A

Joint b

A

Joint b

Front chassis assembly

Joint a

Front chassis assembly

Fig.2

Fig.3

1-4 (No.49822)

2.1.3 Removing the heat sink

(See Fig.4)

(1) Remove the two screws B and two screws C on the left

side of the main body.

KD-S747

B

2.1.4 Removing the bottom cover

(See Figs.5 and 6)

• Prior to performing the following procedure, remove the front

panel assembly, front chassis assembly and heat sink.
(1) Turn over the body and release the two joints c, two joints

d and joint e .

CAUTION:

Do not damage the main board when releasing the joint e us-
ing a screwdriver. (See Figs.5 and 6)

Joint

Joint e

C

Heat sink

Fig.4

c

Bottom cover

Joint d

Fig.5

Joint d

Bottom cover

Joint c

Joint e

Fig.6

(No.49822)1-5

KD-S747

2.1.5 Removing the rear bracket
(See Fig.7)

• Prior to performing the following procedure, remove the front

panel assembly, front chassis assembly, heat sink and bottom
cover.
(1) Remove the three screws D, screw E and two screws F on

the back of the body.

(2) Remove the rear bracket.

Rear bracket

F

2.1.6 Removing the main board
(See Fig.8)

• Prior to performing the following procedure, remove the front

panel assembly, front chassis assembly, heat sink, bottom
cover and rear bracket.
(1) Remove the two screws G attaching the main board.
(2) Disconnect connector CN501 and remove the main board.

2.1.7 Removing the CD mechanism assembly
(See Fig.9)

• Prior to performing the following procedure, remove the front

panel assembly,front chassis assembly, heat sink, bottom cov­er, rear bracket and main board.
(1) Remove the three screws H .

DD

Fig.7

Main board

G

CN501

Fig.8

E

G

H

1-6 (No.49822)

CD mechanism assembly

Top chassis

H

Fig.9

2.1.8 Removing the front board

f

(See Figs.10 to 12)

• Prior to performing the following procedure, remove the front

panel assembly.
(1) Remove the four screws J on the back side of the front

panel assembly.
(2) Release the twelve joints f .
(3) Take out the front board.

KD-S747

J

J

Front panel

Joint f

Front board

J

Fig.10

Joint f

Joint

Joint f

Joint f

Rear cover

Fig.11

Fig.12

(No.49822)1-7

KD-S747

A

2.2 CD Mechanism Assembly

2.2.1 Removing the top cover
(See Figs.1 and 2)

(1) Remove the two screws A on the both side of the body.
(2) Lift the front side of the top cover and move the top cover

backward to release the two joints a.

Top cover

Joints a

A

Joints a

A

Fig.1

Fig.2

Top cover

1-8 (No.49822)

KD-S747

2.2.2 Removing the connector board

(See Figs.3 to 5)

CAUTION:

Before disconnecting the flexible wire from the pickup, solder
the short-circuit point on the pickup. No observance of this in­struction may cause damage of the pickup.
(1) Remove the screw B fixing the connector board.
(2) Solder the short-circuit point on the connector board.
(3) Disconnect the flexible wire from the pickup.
(4) Move the connector board in the direction of the arrow to

release the two joints b.

(5) Unsolder the wire on the connector board if necessary.

CAUTION:

Unsolder the short-circuit point after reassembling.

B

Connector board

Flexible wire

Wires

Joints b

Short-circuit point

Fig.3

Short-circuit point

(Soldering)

Pickup

Flexible wire

Frame

Pickup

Fig.4

B

Connector board

Fig.5

(No.49822)1-9

KD-S747

2.2.3 Removing the DET switch
(See Figs.6 and 7)

(1) Extend the two tabs c of the feed sw. holder and pull out

the switch.

(2) Unsolder the DET switch wire if necessary.

DET switch

Connector
board

Pickup

Fig.6

DET switch

Tab c

Tab c

DET switch wire

Feed sw. holder

Fig.7

1-10 (No.49822)

2.2.4 Removing the chassis unit

r

(See Figs.8 and 9)

• Prior to performing the following procedure, remove the top

cover and connector board.
(1) Remove the two suspension springs (L) and (R) attaching

the chassis unit to the frame.

CAUTION:

• The shape of the suspension spring (L) and (R) are dif­ferent. Handle them with care.

• When reassembling, make sure that the three shafts
on the underside of the chassis unit are inserted to the
dampers certainly.

Suspension spring (R)

KD-S747

Chassis unit

Suspension spring (L)

Frame

Suspension spring (R)

Chassis unit

Shafts

Damper

Damper

Suspension spring (L)

Fig.8

Shaft

Dampe

Frame

Fig.9

(No.49822)1-11

KD-S747

2.2.5 Removing the clamper assembly
(See Figs.10 and 11)

• Prior to performing the following procedure, remove the top

cover.
(1) Remove the clamper arm spring.
(2) Move the clamper assembly in the direction of the arrow to

release the two joints d.

Clamper arm
spring

Joint d

Clamper assembly

Fig.10

Clamper arm spring

Chassis rivet
assembly

Joint d

Joint d

Chassis rivet assembly

Clamper
assembly

Joint d

Fig.11

1-12 (No.49822)

2.2.6 Removing the loading / feed motor assembly

(See Figs.12 and 13)

• Prior to performing the following procedure, remove the top

cover, connector board and chassis unit.
(1) Remove the screw C and move the loading / feed motor

assembly in the direction of the arrow to remove it from the
chassis rivet assembly.

(2) Disconnect the wire from the loading / feed motor assembly

if necessary.

CAUTION:

When reassembling, connect the wire from the loading /
feed motor assembly to the flame as shown in Fig.12.

KD-S747

Loading / feed motor assembly

Fig.12

Loading / feed motor assembly

C

Fig.13

(No.49822)1-13

KD-S747

2.2.7 Removing the pickup unit
(See Figs.14 to 18)

• Prior to performing the following procedure, remove the top

cover, connector board and chassis unit.
(1) Remove the screw D and pull out the pu. shaft holder from

the pu. shaft.
(2) Remove the screw E attaching the feed sw. holder.
(3) Move the part e of the pickup unit upward with the pu. shaft

and the feed sw. holder, then release the joint f of the feed

sw. holder in the direction of the arrow. The joint g of the

pickup unit and the feed rack is released, and the feed sw.

holder comes off.
(4) Remove the pu. shaft from the pickup unit.
(5) Remove the screw F attaching the feed rack to the pickup

unit.

2.2.8 Reattaching the pickup unit
(See Figs.14 to 17)

(1) Reattach the feed rack to the pickup unit using the screw F.
(2) Reattach the feed sw. holder to the feed rack while setting

the joint g to the slot of the feed rack and setting the part f
of the feed rack to the switch of the feed sw. holder correct­ly.

(3) As the feed sw. holder is temporarily attached to the pickup

unit, set to the gear of the joint g and to the bending part of
the chassis (joint h) at a time.

CAUTION:

Make sure that the part i on the underside of the feed
rack is certainly inserted to the slot j of the change lock

lever.
(4) Reattach the feed sw. holder using the screw E.
(5) Reattach the pu. shaft to the pickup unit. Reattach the pu.

shaft holder to the pu. shaft using the screw D.

Joint g

Feed sw.
holder

Part e

Feed rack

Part i

E

F

Pickup unit

Slot j

Fig.15

Joint f

Fig.16

Feed rack

Pickup unit

Feed sw. holder

Pu. shaft

Joint h

D

Pu. shaft
holder

Joint f

Pu. shaft

D

Pu. shaft holder

Feed sw. holder

Pickup unit

Fig.14

Part e

E

Joint g

Pickup unit

Feed rack

Fig.17

Pickup unit

Joint g

Joint f

Feed sw. holder

Fig.18

1-14 (No.49822)

KD-S747

r

2.2.9 Removing the trigger arm
(See Figs.19 and 20)

• Prior to performing the following procedure, remove the top

cover, connector board and clamper unit.
(1) Turn the trigger arm in the direction of the arrow to release

the joint k and pull out upward.

CAUTION:

When reassembling, insert the part m and n of the trigger
arm into the part p and q at the slot of the chassis rivet
assembly respectively and join the joint k at a time.

Chassis rivet assembly

Trigger arm

Chassis rivet
assembly

Joint k

Trigger arm

Fig.19

Part p

Part q

Part m

Part n

2.2.10 Removing the top plate assembly
(See Fig.21)

• Prior to performing the following procedure, remove the top

cover, connector board, chassis unit, and clamper assembly.
(1) Remove the screw H.
(2) Move the top plate assembly in the direction of the arrow to

release the two joints r.

(3) Unsolder the wire marked s if necessary.

H

Fig.20

Top plate assembly

Joints

s

Fig.21

(No.49822)1-15

KD-S747

2.2.11 Removing the mode sw. / select lock arm
(See Figs.22 and 23)

• Prior to performing the following procedure, remove the top

plate assembly.
(1) Bring up the mode sw. to release from the link plate (joint t)

and turn in the direction of the arrow to release the joint u.
(2) Unsolder the wire of the mode sw. marked s if necessary.
(3) Turn the select lock arm in the direction of the arrow to re-

lease the two joints v.
(4) The select lock arm spring comes off the select lock arm at

the same time.

Top plate

Link plate

Joint u

Joint t

s

Fig.22

Select lock arm

Select lock arm

Mode sw.

Select lock arm

Top plate

Hook w

Select lock
arm spring

Link plate

Joints v

Fig.23

1-16 (No.49822)

KD-S747

2.2.12 Reassembling the mode sw. / select lock arm
(See Figs.24 to 26)

REFERENCE:

Reverse the above removing procedure.
(1) Reattach the select lock arm spring to the top plate and set

the shorter end of the select lock arm spring to the hook w
on the top plate.

(2) Set the other longer end of the select lock arm spring to the

boss x on the underside of the select lock arm, and join the
select lock arm to the slots (joint v). Turn the select lock
arm as shown in the figure.

(3) Reattach the mode sw. while setting the part t to the first

peak of the link plate gear, and join the joint u.

CAUTION:

When reattaching the mode sw., check if the points y and
z are correctly fitted and if each part operates properly.

Select lock arm spring

Hook w

Joint v

Joint v

Select lock arm

Boss x

Fig.24

Joint t

Point y

Link plate

Point z

Link plate

Fig.25

Mode sw.

Select
lock arm

Joint t

Joint u

Fig.26

(No.49822)1-17

KD-S747

2.2.13 Removing the select arm R / link plate
(See Figs.27 and 28)

• Prior to performing the following procedure, remove the top

plate assembly.
(1) Bring up the select arm R to release from the link plate

(joint a') and turn as shown in the figure to release the two
joints b' and joint c'.

(2) Move the link plate in the direction of the arrow to release

the joint d'. Remove the link plate spring at the same time.

REFERENCE:

Before removing the link plate, remove the mode sw..

Select arm R

Joint b'

Link plate spring

Top plate

Joint c'

Joint a'

Link plate

Link plate

Joint b'

Fig.27

Joint d'

Fig.28

Joint r

2.2.14 Reattaching the Select arm R / link plate
(See Figs.29 and 30)

REFERENCE:

Reverse the above removing procedure.
(1) Reattach the link plate spring.
(2) Reattach the link plate to the link plate spring while joining

them at joint d'.

(3) Reattach the joint a' of the select arm R to the first peak of

the link plate while joining the two joints b' with the slots.
Then turn the select arm R as shown in the figure. The top
plate is joined to the joint c'.

CAUTION:

When reattaching the select arm R, check if the points e'
and f' are correctly fitted and if each part operates prop­erly.

Select arm R

Joint b'

Joint a'

Link plate spring

Joint c'

Joint d'

Joint b'

Joint a'

Fig.29

Link plate

1-18 (No.49822)

Point e'

Point f'

Fig.30

KD-S747

2.2.15 Removing the loading roller assembly

(See Figs.31 to 33)

• Prior to performing the following procedure, remove the

clamper assembly and top plate assembly.
(1) Push inward the loading roller assembly on the gear side

and detach it upward from the slot of the joint g' of the lock
arm rivet assembly.

(2) Detach the loading roller assembly from the slot of the joint

h' of the lock arm rivet assembly.

The roller guide comes off the gear section of the loading
roller assembly.

Remove the roller guide and the HL washer from the shaft

of the loading roller assembly.
(3) Remove the screw J attaching the lock arm rivet assembly.
(4) Push the shaft at the joint i' of the lock arm rivet assembly

inward to release the lock arm rivet assembly from the slot

of the L side plate.
(5) Extend the lock arm rivet assembly outward and release

the joint j' from the boss of the chassis rivet assembly. The

roller guide springs on both sides come off at the same

time.

CAUTION:

When reassembling, reattach the left and right roller
guide springs to the lock arm rivet assembly before reat­taching the lock arm rivet assembly to the chassis rivet
assembly. Make sure to fit the part k' of the roller guide
spring inside of the roller guide. (Refer to Fig.34.)

Roller guide
spring

Part k'

Chassis rivet assembly

Loading roller assembly

Loading roller assembly

Roller guide
spring

Fig.32

Boss

Roller guide

Joint h'

Roller guide spring

Loading roller assembly

HL washer

Loading roller assembly

Joint g'

Lock arm rivet assembly

Fig.31

Roller guide

Roller guide spring

Roller guide spring

J

Lock arm rivet assembly

Lock arm rivet assembly

L side plate

Roller guide spring

Joint i'

Part j'

Fig.33

Roller guide

HL washer

Roller shaft assembly

Loading roller

Roller guide spring

Fig.34

(No.49822)1-19

KD-S747

2.2.16 Removing the loading gear 5, 6 and 7
(See Figs.35 and 36)

• Prior to performing the following procedure, remove the top

cover, chassis unit, pickup unit and top plate assembly.
(1) Remove the screw K attaching the loading gear bracket.

The loading gear 6 and 7 come off the loading gear brack­et.

(2) Pull out the loading gear 5.

K

Loading gear 5

Loading gear bracket

K

Loading gear 6

Loading gear 5

Loading gear 3

Fig.35

Loading gear bracket

Loading gear 6

Loading gear 7

1-20 (No.49822)

Fig.36

KD-S747

2.2.17 Removing the gears

(See Figs.37 to 40)

• Prior to performing the following procedure, remove the top

cover, chassis unit, top plate assembly and pickup unit.

• Pull out the loading gear 3. (See Fig.35.)

(1) Pull out the feed gear.
(2) Move the loading plate assembly in the direction of the ar-

row to release the L side plate from the two slots m' of the
chassis rivet assembly. (See Fig.37.)

(3) Detach the loading plate assembly upward from the chas-

sis rivet assembly while releasing the joint n'. Remove the
slide hook and loading plate spring from the loading plate
assembly.

(4) Pull out the loading gear 2 and remove the change lock le-

ver.

(5) Remove the E ring and washer attaching the changer gear

2.

(6) The changer gear 2, change gear spring and adjusting

washer come off.
(7) Remove the loading gear 1.
(8) Move the change plate rivet assembly in the direction of the

arrow to release from the three shafts of the chassis rivet

assembly upward. (See Fig.38.)
(9) Detach the loading gear plate rivet assembly from the shaft

of the chassis rivet assembly upward while releasing the

joint p'. (See Figs.38 and 40.)

(10) Pull out the loading gear 4.

Change plate
rivet assembly

Shafts

E ring

Loading plate assembly

Loading plate spring

Joint p'

Loading gear 4

Loading gear plate
rivet assembly

Shaft

Loading gear 2

Loading gear 1

Chassis rivet assembly

Change gear 2

Fig.38

Joint n'

Slide hook

Feed gear

Fig.37

Slot m'

L side plate

Loading plate assembly

Joint n'

Slot m'

Chassis rivet assembly

Chassis rivet assembly

E ring

Washer

Change gear 2

Change gear spring

Adjusting washer

Change plate

rivet assembly

Chassis rivet assembly

L side plate

Slot m'

Slot m'

Fig.39

Loading gear 1

Loading gear 2

Change lock lever

Loading gear 4

Loading gear plate rivet assembly

Fig.40

(No.49822)1-21

KD-S747

2.2.18 Removing the turn table / spindle motor
(See Figs.41 and 42)

• Prior to performing the following procedure, remove the top

cover, connector board, chassis unit and clamper assembly.
(1) Remove the two screws L attaching the spindle motor as-

sembly through the slot of the turn table on top of the body.

(2) Unsolder the wire on the connector board if necessary.

Turn table

L

Fig.41

L

Turn table

1-22 (No.49822)

Spindle motor

Fig.42

3.1 Adjustment method

KD-S747

SECTION 3

Adjustment

Test instruments required for adjustment

1. Digital oscilloscope (100MHz)

2. AM Standard signal generator

3. FM Standard signal generator

4. Stereo modulator

5. Electric voltmeter

6. Digital tester

7. Tracking offset meter

8. Test Disc JVC :CTS-1000

9. Extension cable for check

EXTSH002-22P 1

Standard measuring conditions
Power supply voltage DC14.4V(11~16V)
Load impedance 20Kohm(2 Speakers connection)
Output Level Line out 2.0V (Vol. MAX)

How to connect the extension cable for adjusting

Standard volume position
Balance and Bass &Treble volume : lndication"0"
Loudness : OFF

Frequency Band
FM1/FM2 87.5MHz ~ 108.0MHz
FM3 65.0MHz ~ 74.0MHz
MW 522kHz ~ 1620kHz
L

W 144kHz ~ 279kHz

Dummy load
Exclusive dummy load should be used for AM,and FM. For
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.

The cardboard is cut in a suitable size.
uses for the insulation stand of mechanism.

Caution:
Be sure to attach the heat sink and rear
bracket onto the power amplifier IC301
and regulator IC901 respectively,
before supply the power.
If voltage is applied without attaching
these parts, the power amplifier IC
and regulator IC will be destroyed
by heat.

Heat sink

Extension cable

EXTSH002-22P

Rear bracket

(No.49822)1-23

KD-S747

3.2 Troubleshooting

3.2.1 Feed section

Is the voltage output at
IC521 pin u 5V or 0V?

YES

Is the wiring for IC521

(90) (100) correct?

YES

Is 5V present at IC581

Check the vicinity of

pin 6?

IC521.

YES

NONO

Check CD 9V

and 5V.

Is 4V present at both

sides of the feed motor?

YES

Check the feed motor.

3.2.2 Focus section

3.2.3 Spindle section

Is the disk rotated?

YES

Does the RF signal

appear at TP1?

YES

NO

Is 6V or 2V present at

IC581 Q and R?

Check IC581.

When the lens is

moving:

Does the S-search
waveform appear at
IC581 pins H and I?

YES

NO

Is 4V present between

IC581 pins 1 and 2?

Check the spindle motor

and its wiring.

NO

4V

NO

YES

NO

Check the feed motor

connection wiring.

Check the circuits in

the vicinity of IC581

pins H K.

YES

Check the pickup and

its connections.

NO NO

Is 4V present at IC521

pin x?

YES

Check the vicinity of

IC581.

Check IC501 and

IC521.

Is the RF waveform at TP1

distorted?

YES

Proceed to the Tracking

section

3.2.4 Tracking section

When the disc is rotated

Is the tracking error

signal output at TP3?

Check IC521.

1-24 (No.49822)

at first:

Approx. 1.2 V

YES

Check the circuits in the

vicinity of IC501 J O or

NO

the pickup

Check the circuit in the

vicinity of IC501 pins

2C.

YESYES

Check the pickup and

its connections.

3.2.5 Signal processing section

Is the sound output from
both channels (L, R)?

YES

Normal

No sound from either

channel.

YES

Is 9V present at IC101 pin

(8)?

YES

Is the audio signal

(including sampling output

components) output to

IC521 pins ^and | during

YES

KD-S747

NONO

Compare the L-ch and

R-ch to locate the

defective point.

NO

Check the vicinity of the

Q981 audio power

supply.

NO

Check IC521 and its

peripheral circuits.

Is the audio signal output

at IC101 pins 1

and7during playback?

YES

Check the muting circuit.

NO

Check IC101 and its

peripheral circuits

(No.49822)1-25

KD-S747

3.3 Maintenance of laser pickup

(1) Cleaning the pick up lens

Before you replace the pick up, please try to clean the lens
with a alcohol soaked cotton swab.

(2) Life of the laser diode

When the life of the laser diode has expired, the following
symptoms will appear.

• The level of RF output (EFM output:ampli tude of eye
pattern) will be low.

Is RF output

1.0 0.35Vp-p?

NO

Replace it.

YES

O.K

(3) Semi-fixed resistor on the APC PC board

The semi-fixed resistor on the APC printed circuit board
which is attached to the pickup is used to adjust the laser
power.Since this adjustment should be performed to match
the characteristics of the whole optical block, do not touch
the semi-fixed resistor.
If the laser power is lower than the specified value,the laser
diode is almost worn out, and the laser pickup should be re­placed.
If the semi-fixed resistor is adjusted while the pickup is
functioning normally,the laser pickup may be damaged due
to excessive current.

3.4 Replacement of laser pickup

Turn off the power switch and,disconnect the
power cord from the ac outlet.

Replace the pickup with a normal one.(Refer
to "Pickup Removal" on the previous page)

Plug the power cord in,and turn the power on.
At this time,check that the laser emits for
about 3seconds and the objective lens moves
up and down.
Note: Do not observe the laser beam directly.

Play a disc.

Check the eye-pattern at TP1.

Finish.

1-26 (No.49822)

4.1 HA13164A (IC901) : Regulator

• Terminal layout

123456789101112131415

• Block diagram

ANT OUT

EXT OUT

ANT CTRL

CTRL

CD OUT

AUDIO OUT

C3

0.1u

C4

0.1u

C5

0.1u

C6

10u

2

1

7

11

12

10

SECTION 4

Description of major ICs

C1

100u

VCC ACC

8

Surge Protector

BIAS TSD

15

3

TAB

ILM AJGND GND

13

C2

0.1u

+B

ACC

BATT.DET OUT

9

COMPOUT

6

VDD OUT

4

SW5VOUT

5

ILMOUT

14

R1

C7

0.1u

C8

0.1u

KD-S747

UNIT R:

C:F

note1) TAB (header of IC)

connected to GND

• Pin function

Pin No. Symbol Function

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

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

3 ACCIN Connected to ACC.

4 VDDOUT Regular 5.7V.

5 SW5VOUT Output voltage is 5V when M or H level applied to CTRL pin.

6 COMPOUT Output for ACC detector.

7 ANT CTRL L:ANT output OFF H:ANT output ON

8 VCC Connected to VCC.

9 BATT DET Low battery detect.

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

11 CTRL L:BIAS OFF M:BIAS ON H:CD ON

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

13 ILM AJ Adjustment pin for ILM output voltage.

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

15 GND Connected to GND.

(No.49822)1-27

KD-S747

4.2 LA4743K (IC301) : Power amp.

• Block diagram

IN 1

TAB

IN 2

+

0.22 F

+

0.22 F

11

1

12

Vcc 1/2 Vcc 3/4

6 20

-

+

Protective

circuit

-

+

2200 F 0.022 F

+

9

­7

+

OUT 1+

OUT 1-

PWR GND1

8

+

OUT 2+

5

-

OUT 2-

3

PWR GND2

2

ST BY

R.F

47 F

IN 3

PRE GND

IN 4

+5V
ST ON

+

0.22 F

N.C

+

0.22 F

4

Stand by

Switch

Mute

10

+

Ripple

Filter

Mute

22

circuit

3.3 F

+

15

-

+

-

17

19

10K

+

OUT 3+

OUT 3-

Low Level
Mute ON

25

18

21

23

PWR GND3

OUT 4+

OUT 4-

13

14

Protective

circuit

-

+

+

-

ON TIME C

1-28 (No.49822)

22 F

Muting &

16

+

ON Time Control

Circuit

PWR GND4

24

•Pin layout

TAB

GND

FR-

STDBY

FR+

VP1

RR-

GND

RR+

RIPPLE

INRF

INRR

SGND

FLIN

RLIN

DNTIME

RL+

GND

RL-

VP3

FL+

MUTE

FL-

GND

NC

• Pin function

Pin No. Symbol Function Pin No. Symbol Function

1 TAB Header of IC 14 FLIN Front Lch input

2 GND Power GND 15 RLIN Rear Lch input

3 FR- Outpur(-) for front Rch 16 ONTIME Power on time control

4 STDBY Stand by input 17 RL+ Output (+) for rear Lch

5 FR+ Output (+) for front Rch 18 GND Power GND

6 VP1 Power input 19 RL- Output (-) for rear Lch

7 RR- Output (-) for rear Rch 20 VP3 Power input

8 GND Power GND 21 FL+ Output (+) for front

9 RR+ Output (+) for rear Rch 22 MUTE Muting control input

10 RIPPLE Ripple filter 23 FL- Output (-) for front

11 RRIN Rear Rch input 24 GND Power GND

12 FRIN Front Rch input 25 NC Non connection

13 SGND Signal GND

KD-S747

(No.49822)1-29

KD-S747

W

4.3 LA6579H-X (IC561) : 4-Channel bridge driver

• Pin layout & Block diagram

VIN1-A

1

­+

VIN1+A

VCCP1

2

3

VIN1_SW
[H]: OP-AMP_A
[L]: OP-AMP_B

[H]

[L]

28

VIN1

27

VIN1-B

-

+

26

VIN1+B

VO+

VO-

VO2+

VO2-

FR

VO3+

VO3-

VO4+

4

5

6

7

FR

8

9

10

Power system
GND

­+

Level shift

Level shift

Level shift

Level shift

33k

11k

-

+

All outputs ON/OFF

H : ON
L : OFF

3.3VREG
(External:PTP Tr)

Signal system
power supply

MUTE

Power system GND

Signal system
power supply

+

-

25

24

23

22

FR

21

20

19

S-GND

VIN1-S

MUTE

VREFIN

FR

VCCS

3.3VREG

REGIN

VO4-

VCCP2

VIN4

VIN4G

1-30 (No.49822)

11

12

13

14

11k

33k

­+

33k

33k

18

VIN2G

11k

-

17

VIN2

+

16

VIN3G

11k

-

15

VIN3

+

• Pin function

Pin No. Symbol Function

1 VIN1-A CH1 input AMP_inverted input

2 VIN1+A CH1 input AMP_non-inverted input

3 VCCP1 CH1 and CH2 power stage power supply

4 VO1+ Output pin(+)for channel 1

5 VO1- CH1 output pin (-) for channel 1

6 VO2+ Output pin(+)for channel 2

7 VO2- Output pin(-)for channel 2

8 VO3+ Output pin(+)for channel 3

9 VO3- Output pin(-)for channel 3

10 VO4+ Output pin(+)for channel 4

11 VO4- Output pin(-)for channel 4

12 VCCP2 CH3 and CH4 power stage powr supply

13 VIN4 Input pin for channel 4

14 VIN4G Input pin for channel 4(for gain adjustment)

15 VIN3 Input pin for channel 3

16 VIN3G Input pin for channel 3(for gain adjustment)

17 VIN2 Input pin for channel 2

18 VIN2G Input pin for channel 2(for gain adjustment)

19 REGIN External PNP transistor base connection

20 3.3VREG 3.3VREG output pin external PNP transistor,collector connection

21 VCCS Signal system GND

22 VREFIN Reference voltage application pin

23 MUTE Output ON/OFF pin

24 VIN1_SW CH1 input OP AMP_changeover pin

25 S_GND Signal system GND

26 VIN1+B CH1 AMP_B non-inverted input pin

27 VIN1-B CH1 AMP_B inverted input pin

28 VIN1 CH1 input pin input OP_AMP output pin

KD-S747

(No.49822)1-31

KD-S747

4.4 LC75823W (IC601) : LCD driver

• Pin Layout

DICLCE

OSC

Vss

VDD2

VDD1

INH

VDD

COM3

COM2

COM1

S52

S51

S50

S49

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

1

S1
S2
S3
S4
S5
S6
S7
S8

S9
S10
S11
S12
S13
S14
S15
S16

2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

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

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

S17

S18

S19

S20

S21

S22

S23

S24

S25

S26

S27

S28

S29

S30

S31

S32

• Pin function

Pin No. Symbol I/O Functions

1 to 52 S1 to S52 O Segment output pins used to display data transferred by serial data input.

53 to 55 COM1 to COM3 O Common driver output pins. The frame frequency is given by : t0=(fosc/384)Hz.

56 VDD -- Power supply connection. Provide a voltage of between 4.5 and 6.0V.

57 INH

58 VDD1 I Used for applying the LCD drive 2/3 bias voltage externally.

59 VDD2 I Used for applying the LCD drive 1/3 bias voltage externally.

60 Vss -- Power supply connection. Connect to GND.

61 OSC I/O Oscillator connection.

62 CE I Serial data interface connection to the controller. CE : Chip enable

63 CL I Serial data interface connection to the controller. CL : Sync clock

64 DI I Serial data interface connection to the controller. DI : Transfer data

I Display turning off input pin.

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

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

INT
Serial data can be transferred in display off mode.

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

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

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

1-32 (No.49822)

4.5 NJM4565M-WE (IC571) : CD L.P.F.

T

A

OUTPUT

KD-S747

+

1

8

V

-

A INPUT

+

A INPUT

4.6 IC-PST600M/G/-W (IC702) : System reset

3

-

4

V

Co1

2

OP1

B OUTPU

7

B INPUT

6

5

B INPUT

-

+

1

IN

3

Vout

2

GND

(No.49822)1-33

KD-S747

4.7 TA2157FN-X (IC501) : RF amp

• Terminal layout

24 ~ 13

1 ~ 12

• Block diagram

13

14

15

16

17

18

19

21

20

10pF

20k

40k30k

20k 20k

20k

15k

50 A

12k

12k

BOTTOM

PEAK

20k

20k

20k

PEAK

1.3V

40k

240k

15pF

240k

15pF

40k

50k

2k

20k

50k

14k

K

1

15k

x0.5
x2

x0.5
x2

1k

2k

1.75k

10pF

12

11

10

9

8

7

6

5

4

PIN

VCTRLPIN

1-34 (No.49822)

180k

40pF

22

23

24

SEL

(APC SW)

180k

40pF

3k

3k

TEB

(TE BAL)

60k

60k

RFGC

(AGC Gian)

VCC APC ON -50% +12dB

HiZ APC ON 0% +6dB

GND

APC OFF

(LDO=H)

50% 0dB

94k

94k

22k

22k

3

2

1

TEB

(TE BAL)

Normal mode

(0dB)

Normal mode

(0dB)

CD-RW mode

(+12dB)

• Pin function

Pin No. Symbol I/O Function

1 VCC - 3.3V power supply pin

2 FNI I Main-beam amp input pin

3 FPI I Main-beam amp input pin

4 TPI I Sub-beam amp input pin

5 TNI I Sub-beam amp input pin

6 MDI I Monitor photo diode amp input pin

7 LDO O Laser diode amp output pin

8 SEL I APC circuit ON/OFF control signal, laser diode (LDO) control signal input

or bottom/peak detection frequency change pin.

KD-S747

SEL

GND

Hiz

VCC

9 TEB I Tracking error balance adjustment signal input pin

Adjusts TE signal balance by eliminating carrier component from PWM signal (3-state output,

PWM carrier = 88.2kHz) output from TC94A14F/FA
TEBC pin using RC-LPF and inputting DC.

TEBC input voltage:GND~VCC

10 TEN I Tracking error signal generation amp negative-phase input pin

11 TEO O Tracking error signal generation amp output pin.

Combining TEO signal RFRP signal with TC94A14F/FA configures tracking search system.

12 RFDC O RF signal peak detection output pin

13 GVSW I AGC/FE/TE amp gain change pin

APC
circuit

LDO

OFF Connected VCC through 1k resistor

ON

Control signal output

ON Control signal output

GVSW Mode

GND

Hiz

CD-RW

Normal

VCC

14 VRO O Reference voltage (VRO) output pin

*VRO=1/2VCC When VCC=3.3V

15 FEO O Focus error signal generation amp output pin

16 FEN I Focus error signal generation amp negative-phase input pin

17 RFRP O Signal amp output pin for track count

Combining RFRP signal and TEO signal with TC94A14F/FA configures tracking search system.

18
19
20

21 AGCIN I RF signal amplitude adjustment amp input pin

22 RFO O RF signal generation amp output pin

23 RFI I RF signal generation amp input pin

24 GND - GND pin

REIS

RFGO

RFGC

I

OIRF signal amplitude adjustment amp output pin

RF amplitude adjustment control signal input pin

Adjusts RF signal amplitude by eliminating carrier component from PWM signal (3-state output,
PWM carrier=88.2kHz)output fromTC94A14F/14FA *RFGC pin using RC-LPF and inputting DC.

*RFGC input voltage:GND~VCC

(No.49822)1-35

KD-S747

4.8 TC94A14FA (IC521) : DSP & DAC

• Terminal layout & block daiagram

48 47 46 45 44 43 42 41 40 39

38 37 36 35 34 33

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

LPF

generator

Micro-

controller

interface

Clock

1-bit
DAC

Audio out

Correction

circuit

circuit

Address

circuit

16 k

RAM

Digital
output

PWM

Servo
control

ROM

RAM

CLV servo

Synchronous

guarantee

EFM

decoder

Sub code

decoder

Digital equalizer

automatic

adjustment circuit

A/D

Data

slicer

VCO

PLL

TMAX

D/A

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

64

17

161514131211101 2 3 4 5 6 7 8 9

• Pin function

Pin

Symbol I/O Descroption

No

1 BCK O Bit clock output pin.32fs48fsor 64fs selectable by command.
2 LRCK O L/R channel clock output pin."L" for L channel and "H" for R channel.

Output polarity can be inverted by command.
3 AOUT O Audio data output pin. MSB-first or LSB-first selectable by command.
4 DOUT O Digital data output pin.Outputs up to double-speed playback.
5 IPF O Correction flag output pin. When set to "H" AOUT output cannot be corrected by C2 correction processing.
6V

DD3

7V

SS3

- Digital 3.3V power supply voltage pin.

- Digital GND pin.
8 SBOK O Subcode Q data CRCC result output pin. "H" level when result is OK.
9 CLCK O Subcode P-W data read I/O pin. I/O polarity selectable by command.

10 DATA O Subcode P-W data output pin.
11 SFSY O Playback frame sync signal output pin.
12 SBSY O Subcode block sync signal output pin. "H" level at S1 when subcode sync is detected.
13 HSO
14 UHSO
15 PV

I/O General-purpose input / output pins.Input port at reset.

- PLL-only 3.3V power supply voltage pin.

DD3

16 PDO O EFM and PLCK phase difference signal output pin.

1-36 (No.49822)

Pin

Symbol I/O Descroption

No
17 TMAX O TMAX detection result output pin.

KD-S747

TMAX Detection Result
Longer than fixed period

Within fixed period
Shorter than fixed period

TMAX Output

DD3"

"PV
"HiZ"
"AV

SS3"

18 LPFN I Inverted input pin for PLL LPF amp.
19 LPFO O Output pin for PLL LPF amp.
20 PVREF - PLL-only VREF pin.
21 VCOF O VCO filter pin.
22 AV

- Analog GND pin.

SS3

23 SLCO O DAC output pin for data slice level generation.
24 RFI I RF signal input pin. Zin selectable by command.
25 AV

- Analog 3.3V power supply voltage pin.

DD3

26 RFCT I RFRP signal center level input pin.
27 RFZI I RFRP signal zero-cross input pin.
28 RFRP I RF ripple signal input pin.
29 FEI I Focus error signal input pin.
30 SBAD I Sub-beam adder signal input pin.
31 TEI I Tracking error input pin. Inputs when tracking servo is on.
32 TEZI I Tracking error signal zero-cross input pin.
33 FOO O Focus equalizer output pin.
34 TRO O Tracking equalizer output pin.
35 VREF - Analog reference power supply voltage pin.
36 RFGC O RF amplitude adjustment control signal output pin.
37 TEBC O Tracking balance control signal output pin.
38 SEL O APC circuit ON/OFF signal output pin. At laser on, high impedance with UHS="L",

H output with UHS="H".

39 AV

- Analog 3.3V power supply voltage pin.

DD3

40 FMO O Feed equalizer output pin.
41 DMO O Disc equalizer output pin.
42 V
43 V

SS3

DD3

- Digital GND pin.

- Digital 3.3V power supply voltage pin.
44 TESIN I Test input pin. Normally, fixed to "L".
45 XV

- System clock oscillator GND pin.

SS3

46 XI I System clock oscillator input pin.
47 XO O System clock oscillator output pin.
48 XV
49 DV

SS3

- System clock oscillator 3.3V power supply voltage pin.

DD3

R - DA converter GND pin.
50 RO O R-channel data forward output pin.
51 DV

- DA converter 3.3V power supply pin.

DD3

52 DVR - Reference voltage pin.
53 LO O L-channel data forward output pin.
54 DV

L - DA converter GND pin.

SS3

55 ZDET O 1 bit DA converter zero detection flag output pin.
56 V

SS5

- Microcontroller interface GND pin.
57 BUS0
58 BUS1

I/O Microcontroller interface data I/O pins.59 BUS2
60 BUS3
61 BUCK I Microcontroller interface clock input pin.
62 /CCE I Microcontroller interface chip enable signal input pin.At "L", BUS0 to BUS3 are active.
63 /RST I Reset signal input pin. At reset, "L".
64 V

DD5

- Microcontroller interface 5V power supply pin.

(No.49822)1-37

KD-S747

4.9 TB2118F-X (IC31) : PLL

• Terminal Layout

2423222120191817161514

13

• Block diagram

FM VCO

AMVCO

DIN

CK

DOUT

123456789

osc

XO

IFC

XI

CE

2

1

24

15

16

13

3

4

5

6

Buff.

ON/OFF

OSC circuit

AMP

AMP

AMP

Serial

Interface

101112

Prescaler

Reference Counter

4-bit

Swallow counter

Programmable counter

20-bit BINARY COUNTER

Resistor 1

Resistor 2

I/O PORT

22-bit

OUTPUT PORT

Phase

Comparator

12-bit

40bit shift register

Constant

power supply voltage

switch

Vdd

switch

Vcc

AM CP.

20

­+

+

-

RF

22

19

Vt

18

FM cp

7

SL

8

9

I/O -2I/O -1

10 11

12

out-2out-1

vdd2

14

17

21

23

a-gnd

vccd-gndvdd

• Pin Function
Pin

Symbol I/O Function

No.

Pin

Symbol I/O Function

No.

1 XOUT O Crystal oscillator pin 13 IFC I IF signal input

2 OSC - Non connect 14 VDD - Power pins for digital block

3 CE I Chip enable input 15 FMIN I FM band local signal input

4 DI I Serial data input 16 AMIN I AM band local signal input

5 CK I Clock input 17 DGND - Connect to GND (for digital circuit)

6 DOUT O Serial data output 18 FMCP O Charge pump output for FM

7 SR O Register control pin 19 Vt - Tuning voltage biased to 2.5V.

8 I/01 I/O I/O ports 20 AMCP O Charge pump output for AM

9 I/02 I/O I/O ports 21 VCC - Power pins for analog block

10 OUT1 - Non connect 22 RF I Ripple filter connecting pin

11 OUT2 - Non connect 23 AGND - Connect to GND (for analog circuit)

12 VDD2 - Single power supply for REF. frequency block 24 XIN I Crystal oscillator pin

1-38 (No.49822)

4.10 TEA6320T-X (IC161) : E.volume

•Pin layout

TAPE

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

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16

CD-CH

TUNER

• Block diagram

10 8 9 7 6

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

KD-S747

5

12

21
31

2

19

POWER

SUPPLY

VOLUME 1

+20 to -31 dB

LOUDNESS

LEFT

16
15
13
11

14

22
20

SOURCE

SELECTOR

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

3

4

32

TREBLE

LEFT

+12 dB

MUTE

FUNCTION

ZERO CROSS

DETECTOR

1

VOLUME 2

TREBLE

RIGHT

+12 dB

Pin

No.

Symbol I/O Functions

0 to -55dB
BALANCE

FENDER FRONT

VOLUME 2

0 to -55dB
BALANCE

FENDER REAR

29

30

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.49822)1-39

KD-S747

4.11 UPD784215AGC224 (IC701) : CPU

• Pin Layout

75 ~ 51

76 ~ 100

50 ~ 26

1 ~ 25

• Pin function

Pin No. Symbol I/O function

1~2 no use O output L

3 SW2 I CD mecha SW2

4 PSW I CD mecha Position Setting SW

5 LM O loading motor control output

6 MOTOR SEL O Loading/feed motor selecting output

7~8 no use O output L

9 VDD maicon power supply

10 X2

11 X1

12 VSS - GND

13 XT2

14 XT1

15 RESET I SYSTEM RESET

16 SW1 I CD mecha sw1

17 no use O output L

18 PS2 I power save2, H means STOP mode

19~22 no use O output L

23 AVDD A/D converter power supply

24 AVREF0 A/D reference voltage

25 VOLÇP I volume encoder pulse input 1

26 VOLÇQ I volume encoder pulse input 2

27 KEY0 I key input 0

28 KEY1 I key input 1

29 KEY2 I key input 2

30 LEVEL I level meter input

31 no use I Input

32 SM I S DMETER input

33 AVSS - GND

34~35 no use O output L

36 AVREF

37~40 no use O output L

41 LCD-DA O data output for LCD driver

42 LCD-SCK O CLK output for LCD driver

43 LCD-CE O CE for LCD driver

44 no use O output L

45 E2PROM-DI I I2C data input

46 E2PROM-DO O I2C data output

1-40 (No.49822)

Pin No. Symbol I/O function

47 E2PROM-CLK O I2C clock output

48~50 no use O output L

51 no use O output L

53 SD/ST I station detector or streo indicator input ; H means a station is there. L means the program is stereo.

54 no use O output L

55 MONO O monoral selection output ; H means monoral

56~60 no use O output L

61 DETACH I detach detect input ; H means detaching

62 no use O output L

63 SEEK/STOP O auto seek and stop selecting output ; H means seeking, L means receiving.

64 IFC CONT O IFC control output

65 FM/AM O FM, AM band selecting output ; H = FM CL= AM

66 PLL-CE O CE output for PLL IC

67 PLL-DO O data output for PLL IC

68 PLL-CLK O clock output for PLL IC

69 PLL-DI I data input from PLL IC

70 TEL-MUTING I telphone muting detection input ; Active level can be selected H or L in PSM

71 no use O output L

72 VSS - GND

73 no use I output L

74 PS1 I POWER SAVE1 Çk= ACC off

75 POWER O POWER ON/OFF control output H=power on

76 CD-ON O CD power supply control output H=CD power on

77 MUTING O muting output L=muting on

78~80 no use O output L

81 VDD - maicon power supply

82 no use O output L

83 VOL-DA O data output for e-vol IC

84 VOL-CLK O clock output for e-vol IC

85~88 no use I output L

89~90 no use I output L

91 BUCK O clock output for CD LSI

92 CCE O CE output for CD LSI

93 RST O reset output for CD LSI

94 TEST for rewriting flash memory

95 BUS0 I/O data output and input 0 for CD LSI

96 BUS1 I/O data output and input 1 for CD LSI

97 BUS2 I/O data output and input 2 for CD LSI

98 BUS3 I/O data output and input 3 for CD LSI

99 no use O output L

100 CD-RW RF gain control L=CD-RW, H=CD-DA

KD-S747

(No.49822)1-41

KD-S747

VICTOR COMPANY OF JAPAN, LIMITED

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

(No.49822)

Printed in Japan

200303WPC