JVC KD-LX555R Service Manual

SERVICE MANUAL

CD RECEIVER

4979320034

KD-LX555R

S

STDM

SOURCE

9

7

8

KD-LX555R

0

1

12

11

Area Suffix

E ------ Continental Europe

TABLE OF CONTENTS

1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.

No.49793

2003/5

SPECIFICATION

AUDIO AMPLIFIER SECTION Maximum Power Output Front 50 W per channel

Rear 50 W per channel

Continuous Power Output (RMS) Front 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz

at no more than 0.8% total harmonic distortion.

Rear 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz

at no more than 0.8% total harmonic distortion.

Load Impedance 4 Ω (4 Ω to 8 Ω allowance)

Equalizer Control Range: LOW ±12 dB (50 Hz, 80 Hz, 120 Hz)

MID ±12 dB (700 Hz, 1 kHz, 2 kHz)

HIGH ±12 dB (8 kHz, 12 kHz)

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

Line-Out Level/Impedance 2.0 V/20 kΩ load (full scale)
Output Impedance 1 kΩ

TUNER SECTION Frequency Range FM 87.5 MHz to 108.0 MHz

AM (MW) 522 kHz to 1 620 kHz

(LW) 144 kHz to 279 kHz

[FM Tuner]

Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

Capture Ratio 1.5 dB

[MW Tuner]

Sensitivity 20 µV

Selectivity 35 dB

[LW Tuner]

Sensitivity 50 µV

CD PLAYER SECTION Type Compact disc player

Signal Detection System

Number of channels 2 channels (stereo)

Frequency Response 5 Hz to 20 000 Hz

Dynamic Range 98 dB

Signal-to-Noise Ratio 102 dB

Wow and Flutter Less than measurable limit

MP3 decoding format

GENERAL Power Requirement: Operating Voltage DC 14.4 V (11 V to 16 V allowance)

Grounding System Negative ground

Allowable Operating Temperature 0°C to +40°C
Dimensions (W × H × D) Installation Size 182 mm × 52 mm × 160 mm

Panel Size 188 mm × 58 mm × 8 mm

Mass 1.8 kg (excluding accessories)

Non-contact optical pickup (semiconductor laser)

MPEG1/2 Audio Layer 3
Max. Bit Rate:320 Kbps

Design and specifications are subject to change without notice.

1-2 (No.49793)

1.1 Safety Precautions

SECTION 1

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.

(No.49793)1-3

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 CD 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

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) It 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.

1-4 (No.49793)

Connector board

Soldering

SECTION 2

A

A

Disassembly method

2.1 Main body

2.1.1 Removing the top chassis
(See Fig.1~5)

(1) Remove the two screws A attaching the bottom cover to

the top chassis on the bottom of the body.

(2) Remove the two screws B attaching the top chassis on

both sides of the body.

(3) Remove the screw C and the thee screws D attaching the

heat sink on the left side of the body.

(4) Remove the two screws E and the screw F on the back of

the body.
(5) Remove the two screws G on the upper side of the body.
(6) Move the top chassis upward and disconnect the CD

mechanism connector from the main board connector by

pulling it. Remove the top chassis from the body.

Bottom cover

C

Heat sink

E

D

D

Fig.3

Top chassis

B

F

Fig.1

Top chassis

Fig.2

B

Fig.4

Top chassis

G

G

Fig.5

(No.49793)1-5

2.1.2 Removing the front panel assembly
(See Fig.6~8)

• Prior to performing the following procedure, remove the top

chassis assembly.
(1) Disconnect the flexible harness from connector CN701 on

the main board assembly.

(2) Remove the four screws H attaching the front panel as-

sembly on both sides of the body. Remove the front panel
toward the front.

CN701

Front panel assembly

Fig.6

Front panel assembly

H

H

Fig.7

Front panel assembly

CN701

Fig.8

1-6 (No.49793)

2.1.3 Removing the Front Board

(See Fig.9)

• Prior to performing the following procedure, remove the top

chassis assembly and the front panel assembly.
(1) Remove the four screws I attaching the front board on the

back of the front panel assembly and release the eight
joints a.

2.1.4 Removing the lifter unit

(See Fig.10)

• Prior to performing the following procedure, remove the top

chassis assembly and the front panel assembly.
(1) Disconnect the harness from connector CN830 and CN831

on the main board.

(2) Remove the four screws J and detach the lifter unit from

the bottom cover.

I

CN830

J

Joints a

I

Joints a

Fig.9

CN831

J

Fig.10

Lifter unit assembly

(No.49793)1-7

2.1.5 Removing the feed motor (L)
(See Fig.11)

• Prior to performing the following procedure, remove the lifter

unit.
(1) Remove the washer attaching the clutch assembly and de-

tach the clutch assembly from the shaft of the lifter unit.

(2) Remove the two screws K attaching the feed motor (L).

Lifter unit assembly

Washer

K

2.1.6 Removing the feed motor (R)
(See Fig.12)

• Prior to performing the following procedure, remove the lifter

unit.
(1) Remove the washer attaching the clutch assembly and de-

tach the clutch assembly from the shaft of the lifter unit.

(2) Remove the two screws L attaching the feed motor (R).

Clutch assembly

Clutch assembly

Washer

Feed motor (L) assembly

Fig.11

Lifter unit assembly

L

Feed motor (R) assembly

Fig.12

1-8 (No.49793)

2.1.7 Removing the operation assembly

(See Fig.13~16)

• Prior to performing the following procedure, remove the top

chassis assembly, the front panel assembly and the lifer unit.
(1) Disconnect the card wire from connector CN702 on the

main board and remove the operation assembly.

(2) Remove the three screws M attaching the right and left

brackets, which fix gears on both sides of the operation as­sembly.

(3) Remove the springs 5 and 6 from the operation assembly.

ATTENTION:

When reassembling, correctly engage the switch S651 and
S652 on the main board and the right gear with the part b of
the operation assembly.

b

Operation assembly

Fig.15

Bracket (L)

M

Spring 5

CN702

Operation assembly

Fig.13

Bracket (R)

M

Spring 6

S652

S651

S652

Bracket (R)

Operation assembly b

S651

Fig.16

Operation assembly b

Fig.14

(No.49793)1-9

2.1.8 Removing the operation switch board
(See Fig.17~19)

• Prior to performing the following procedure, remove the oper-

ation assembly.
(1) Remove the six screws N attaching the button panel on the

operation assembly.

(2) Release the bottom panel from the bottom base at the bot-

tom of the operation switch assembly five joint c and re­move the bottom panel.

(3) Pull out the operation switch board from inside of the button

panel.

NN

Button panel

Fig.17

CC

Operation switch board

Button base

Button panel

Fig.18

Button panel

Fig.19

1-10 (No.49793)

2.1.9 Removing the MP3 board assembly

(See Fig.20,21)

• Prior to performing the following procedure, remove the top

chassis.

Caution:

Before disconnecting the card wire from connector CN601 on
the MP3 board, solder the short-circuit point on the connector
board in the CD mechanism assembly (Refer to Fig.20).
(1) Disconnect the card wire from connector CN601 on the

MP3 board assembly.

(2) Remove the five screws O attaching the MP3 board as-

sembly and release the joint d and e.

Caution:

When reattaching the MP3 board, connect the card wire ex­tending from the connector board to connector CN601 and un­solder the short-circuit point (Refer to Fig.21).

Connector board

Soldering

Fig.20

OO

CN601

2.1.10 Removing the CD mechanism assembly

(See Fig.22)

(1) Remove the three screws P and the CD mechanism as-

sembly from the top chassis.

e

d

OOO

MP3 board

Fig.21

P

P

P

CD mechanism assembly

Fig.22

(No.49793)1-11

2.1.11 Removing the main board assembly
(See Fig.23~25)

• Prior to performing the following procedure, remove the top

chassis.
(1) Disconnect the flexible harness from connector CN701, the

card wire from CN702 on the main board and the harness
from CN830 and CN831 respectively.

(2) Remove the three screws Q attaching the main board as-

sembly to the bottom cover on the upper side of the body.

(3) Remove the screw R attaching the rear panel and the bot-

tom cover on the back of the body. Move the main board in
the direction of the arrow and release the two joints f. (At
this point, the main board can be removed with the rear
panel and the rear heat sink.)

(4) Remove the three screws S attaching the rear heat sink on

the back of the body.

(5) Remove the two screws T and the screw U attaching the

rear panel. Now, the main board assembly will be removed.

ATTENTION:

When reassembling, correctly engage the switch S651 and
S652 on the main board and the right gear with the part b of
the operation assembly (Refer to Fig.24).

CN830

Q

Joint f

CN831

CN701

Q

Joint f

CN702

Front panel assembly

Fig.23

S652

S651

Rear panel

T

Main board

USR

b

Fig.24

ST

Rear heat sink

Fig.25

1-12 (No.49793)

2.2 CD Mechanism section

A

2.2.1 Removing the top cover

(See Figs.1 and 2)

(1) Remove the four 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

(No.49793)1-13

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 pickup.
(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 wires 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

1-14 (No.49793)

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

(No.49793)1-15

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)

Chassis unit

Suspension spring (L)

Frame

Suspension spring (R)

Chassis unit

Shafts

Damper

Damper

Suspension spring (L)

Fig.8

Shaft

Dampe

Frame

Fig.9

1-16 (No.49793)

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

Joint d

Clamper assembly

Fig.10

Clamper arm spring

Chassis rivet
assembly

Joint d

Clamper assembly

Chassis rivet assembly

Joint d

Fig.11

(No.49793)1-17

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 as-

sembly 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.

Loading / feed motor assembly

Fig.12

Loading / feed motor assembly

C

Fig.13

1-18 (No.49793)

2.2.7 Removing the pickup unit

r

(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.

Part e

Feed rack

Pickup unit

Feed sw. holder

Fig.15

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 joint 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.

Feed sw. holder

Joint f

Joint g

Feed sw. holder

Pickup unit

E

Part i

Slot j

F

Pu. shaft

Pickup unit

Joint f

Joint h

Fig.16

Feed rack

D

Pu. shaft holde

Pu. shaft

D

Pu. shaft holder

Pickup unit

Fig.14

Part e

E

Joint g

Feed rack

Fig.17

Pickup unit

Joint g

Joint f

Feed sw. holder

Fig.18

(No.49793)1-19

2.2.9 Removing the trigger arm

r

(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

1-20 (No.49793)

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.

Link plate

Joint u

Fig.22

Joint t

Mode sw.

Select lock arm

s

Top plate

Select lock arm

Link plate

Select lock arm

Fig.23

Top plate

Hook w

Select lock
arm spring

Joints v

(No.49793)1-21

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

1-22 (No.49793)

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

Joint c'

Joint a'

Link plate

Joint b'

Fig.27

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.

Top plate

Select arm R

Joint b'

Joint d'

Link plate

Fig.28

Link plate spring

Joint c'

Joint d'

Joint b'

Joint a'

Fig.29

Joint a'

Point e'

Link plate

Point f'

Fig.30

(No.49793)1-23

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.

Roller guide
spring

Part k'

Loading roller assembly

Loading roller 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

HL washer

Loading roller assembly

Roller guide

Chassis rivet assembly

J

Roller guide
spring

Fig.32

Boss

L side plate

Roller guide spring

Joint h'

Roller guide spring

Loading roller assembly

1-24 (No.49793)

Joint g'

Lock arm rivet assembly

Fig.31

Roller guide spring

Roller guide spring

Lock arm rivet assembly

Lock arm rivet assembly

Joint j'

Joint i'

Fig.33

Roller guide

HL washer

Roller shaft assembly

Loading roller

Roller guide spring

Fig.34

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

Fig.36

(No.49793)1-25

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 change gear

2.

(6) The change 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

L side plate

Slot m'

Slot m'

Fig.39

Loading gear 1

Loading gear 2

Change lock lever

Loading gear 4

1-26 (No.49793)

Chassis rivet assembly

Loading gear plate rivet

assembly

Fig.40

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

Spindle motor

Fig.42

(No.49793)1-27

SECTION 3

Adjustment

3.1 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

3.2 Standard volume position

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

3.6 How to connect the extension cable for adjusting

Caution:

Be sure to attach the heat sink and rear bracket onto the power amplifier and regulator 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.

3.3 Standard measuring conditions

Power supply voltage DC14.4V(11 to 16V)

Load impedance 20KΩ(2 Speakers connection)

Output Level Line out 2.0V (Vol. MAX)

3.4 Frequency Band

FM1 87.5MHz to 108.0MHz
AM (MW) 522kHz to 1620kHz
AM (LW) 144kHz to 279kHz

3.5 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.

EXTLX002-JIG : Kit including the following 8 extension parts.

No.

1
2
3
4
5
6
7

Parts number Quantity Description
EXTLX001-2P
EXTLX001-6PF
EXTLX001-6PC
EXTLX002-16PF
EXTLX002-16PC
EXTLX002-SWPWB
EXTLX002-4P

2
1
1
1
1
1
1

2Pin, 30cm extension cord
6Pin, 30cm flat wire
6Pin x 2, interlocking connector
16Pin flat wire
16Pin, interlocking connector
3 switch PWB
4Pin, 30cm extension cord

EXTSH002-22P

EXTLX001-16PF

EXTLX002-SWPWB

EXTLX002-4P

EXTLX002-16PC

EXTLX001-2P

EXTLX001-6PC

EXTLX001-2P

EXTLX001-6PF

1-28 (No.49793)

3.7 Flow of functional operation unit TOC read

When the pickup correctly moves

v

to the inner area of the disc

Power ON

Set Function CD

When the laser diode correctly

emits

Microprocessor
commands

FMO
TC94A14FA "40"

FEED MOTOR
+TERMINAL
IC681 "4"

REST SW

When correctly focused

FEO
TA2157 "15"

Focus Servo Loop ON

$83

$82

$81

3.3V
Hi-Z
0V

6V
4V
2V

OFF

ON

Pickup feed to the inner area

2.2V

RF signal eye-pattern
remains closed

Disc inserted

YES

Laser emitted

Focus search

Disc rotates

Tracking loop closed

YES

Microprocessor
commands

SEL
TC94A14FA"38"

LD
CN601"15"

"No disc"

display

When the disc correctly rotates

Microprocessor
commands

DMO
TC94A14FA "41"

$84 $86 $ A200

$84

3.3V
0V

4V

0V

3.3V

2.2V
0V

RF signal eye-pattern
opens

TOC read out

Jump to the first track

Play

Spindle
motor(-)
IC681 "7"

Acceleration Servo CLV

Tracking Servo Loop ON

RF signal

6V

3.2
2V

Rough
Servo

0.5 Sec 0.5 Sec

Rough Servo Mode

CLV Servo Mode
(Program Area)

CLV Servo Mode
(Lead-In Area;
Digital :0)

(No.49793)1-29

3.8 Troubleshooting

Feed section

Is the voltage output at
IC621 pin "40" 5V or 0V?

Is 4V present at both
sides of the feed motor?

YES

YES

NO YES NO

Is the wiring for IC681
pin 27?

NO

Is 3.3V present at IC681
pin "20"?

YES

Check the vicinity of

Check CD 8V
and 5V.

IC621.

NO

Is 6V or 2V present at
IC681 "4" and "5"?

YES

Check the feed motor
connection wiring.

NO

Check the feed motor.

Focus section

When the lens is
moving:

4V

Does the S-search
waveform appear at
IC681 pins "8" and "9"?

Spindle section

Is the disk rotated?

YES

Does the RF signal
appear at RF test point?

YES

Is the RF waveform at RF
test point distorted?

YES

Proceed to the Tracking
section

Check IC601.

NO

Check the circuits in
the vicinity of IC681
pins "8","9"and"15".

YES

Check the pickup and
its connections

NO

Is 4V present at IC681
pins "6" and "7"?

Check the spindle motor
and its wiring

NO

Check the circuits in the
vicinity of IC681 "19"~

NO

"24" or the pickup

YES

YES

NO

Is 4V present at IC621
pins "41" ?

Check the vicinity of
IC561.

NO

YES

Check IC621 and
IC681.

Tracking section

When the disc is rotated
at first:

Is the tracking error signal
output at IC601 "11"?

1-30 (No.49793)

Approx. 1.2V

YES

Check IC621.

YES YES

Check the circuit in the
vicinity of IC501 pins
"2"~"7".

Check the pickup and
its connections

3.9 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: amplitude of eye
pattern) will be low.

3.10 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)

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.

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 RF test point.

Finish.

(No.49793)1-31

SECTION 4

Description of major ICs

4.1 BA6956AN (IC830, IC831) : Reversible motor driver

• Block diagram

TSD

CONTROL LOGIC

1 2 3 4 5 6 7 8 9

REF

OUT2

RNF

VM

OUT1

Vcc

FIN

GND

RIN

• Pin function • Truth table

Pin No. Symbol Function

1 VREF Output high voltage level control terminal

2 OUT2 Output terminal for motor

3 RNF GND of driver division

4 OUT1 Output terminal for motor

FIN RIN OUT1 OUT2 MODE

H L H L Forward rotation mode

L H L H Reverse rotation mode

H H L L Break Mode

L L OPEN OPEN Stand-by mode

5 VM Power supply for driver division

6 Vcc Power supply for signal division

7 FIN Input terminal for control logic

8GNDGND

9 RIN Input terminal for control logic

1-32 (No.49793)

4.2 BR24C01AFV-W-X (IC1502) : EEPROM

A

•Pin layout

Vcc WP SCL SDA

A0 A1 A2 GND

• Block diagram

A0

1

7bit

A1

2

A2

3

GND

• Pin function
Pin name I/O Description

Vcc - Power supply

GND - Ground (0v)

A0,A1,A2 IN Slave address set

SCL IN Serial clock input

SDA IN / OUT Slave and word addressserial data input serial data output *1

WP IN Write protect input

*1 An open drain output requires a pull-up resister.

4

ADDRESS

DECODER

CONTROL LOGIC

HIGH VOLTAGE GEN.

1kbit EEPROM ARRAY

SLAVE/WORD

7bit

ADDRESS REGISTER

START

STOP

Vcc LEVEL DETECT

ACK

8bit

DATA

REGISTER

Vcc

8

7

WP

6

SCL

5

SD

(No.49793)1-33

4.3 BR24C32F (IC703) : EEPROM

A

• Pin Layout

VCC

BR24C32/F

• Pin function

SDASCLWP

• Pin layout & Block diagram

PIN NAME I/O Function

VCC - Power Supply

GND - Ground (0V)

A0-A2 I Slave Address Set

SCL I Serial Clock Input

SDA I/O Slave and Word Address.

Serial Data Input$ Serial Data Output *1

WP I Write Protect Input

GNDA2A1A0

1

A0

12bit

2

A1

3

A2

4

GND

4.4 HD74HC126FP (IC771) : Changer Control

OE1

A1

Y1

1

2

3

ADDRESS
DECODER

CONTROL LOGIC

HIGH VOLTAGE GEN.

14

13

12

32 Kbit EEPROM ARRAY

SLAVE WORD

12bit

ADDRESS REGISTER

START STOP

VCC LEVEL DETECT

Vcc

OE4

A4

DATA
REGISTER

ACK

8bit

8

7

6

5

Vcc

WP

SCL

SD

OE2

A2

Y2

Vss

1-34 (No.49793)

4

5

6

7

HD74HC126

11

10

9

8

Y4

OE3

A3

Y3

4.5 BU1923F (IC51) : RDS decoder

A

•Pin layout

1

QUAL

RDATA

Vref

MUX

VDD1

VSS1
VSS3

CMP

2
3
4
5
6
7
8

16
15
14
13
12
11
10

• Block diagram

9

RCLK
N.C.
XO
XI
VDD2
VSS2
T1
T2

MUX

Vref

VDD1

VSS1

VDD2

VSS2

4

3

5

Power supply

6

12

Power supply

11

100k

120k

Analog

Digital

100k

-

+

anti-aliasing

filter

PLL
57kHz

RDS/ARI

Reference
clock

PLL

1187.5Hz

VSS3

8th Switched
capacitor filter

Bi-phase
decoder

7

CMP

Measurement

circuit

8

comparator

Differential
decoder

16

1

2

RCLK

QUAL

RDAT

13

Xl

14

X0

10 9

T1

T2

(No.49793)1-35

4.6 HA13164A (IC961) : 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

VCC ACC

8

Surge Protector

BIAS TSD

15

3

TAB

C1

100u

C2

0.1u

13

ILM AJGND GND

+B

ACC

BATT.DET OUT

9

COMPOUT

6

VDD OUT

4

SW5VOUT

5

ILMOUT

14

R1

C7

0.1u

C8

0.1u

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.

1-36 (No.49793)

4.7 HD74HCT126T-X : (IC1500,IC1503) Buffer

• Pin arrangement • Pin function

Input Output

1C

1A

1Y

2C

2A

2Y

GND

• Block diagram

1

2

3

4

5

6

7

14

13

12

11

10

Vcc

4C

4A

4Y

3C

9

3A

8

3Y

CA Y

LX Z

HL L

HH H

H : High level
L : Low level
X : Irrelevant
Z : Off (Hhigh-impedance)state of a 3-stage output

1A

1C

2A

2C

3A

3C

4A

1Y

2Y

3Y

4Y

4C

(No.49793)1-37

4.8 LA47505 (IC941) : Power amp.

• Terminal layout

206

11

1

12

4

10

Stand by

Switch

Ripple

Filter

Protective

circuit

Mute

circuit

9

7

8

5

3

2

22

15

25

13

14

16

Muting &

On Time Control

Circuit

protective

circuit

17

19

18

21

23

24

1-38 (No.49793)

• 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

NC

• Pin function

Pin No. Symbol Function

1 AC CONT1 Header of IC

2 GND1 Power GND

3 OUTFR- Outpur(-) for front Rch

4 STBY Stand by input

5 OUTFR+ Output (+) for front Rch

6 Vcc1/2 Power input

7 OUTRR- Output (-) for rear Rch

8 GND2 Power GND

9 OUTRR+ Output (+) for rear Rch

10 VREF Ripple filter

11 INRR Rear Rch input

12 INFR Front Rch input

13 SGND Signal GND

14 INFL Front Lch input

15 INRL Rear Lch input

16 ONTIME Power on time control

17 OUTRL+ Output (+) for rear Lch

18 GND3 Power GND

19 OUTRL- Output (-) for rear Lch

20 Vcc3/4 Power input

21 OUTFL+ Output (+) for front

22 MUTE Muting control input

23 OUTFL- Output (-) for front

24 GND4 Power GND

25 NC No connection

(No.49793)1-39

4.9 LA6579H-X (IC1681) : 4-Channel bridge driver

W

• 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

-

+

H : ON

L : OFF

3.3VREG
(External:PTP Tr)

Signal system
power supply

All outputs ON/OFF

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

1-40 (No.49793)

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

(No.49793)1-41

4.10 M61508FP (IC400) : E.volume

• Pin layout & Block diagram

VDD OUT 2

CLOCK

VDD

NonFadaer OUT 2

FRONT OUT 2

REAR OUT2

FADER IN 2

TONE OUT 2

VOL IN 2

SEL OUT 2

19

20

21

22

23

24

25

26

LOUDNESS
+
3BAND TONE
CONTROL
(BASS/MID/
TREBLE)

27

28

SOFT
SELECT

NON FADER
VOLUME

+ -

VOLUME 2

A

B

ZERO
CROSS
DETECTOR

VOLUME 1

I/F

TIMER
DETECTOR

NON FADER
VOLUME

A

B

ZERO DETECT

SELECT SWITCH

ZERO
CROSS
DETECTOR

GNDVDD

- +

LOUDNESS
+
3BAND TONE
CONTROL
(BASS/MID/
TREBLE)

18 VDD OUT 1

17

DATA

GND

16

15

NonFadaer OUT 1

FRONT OUT 1

14

REAR OUT1

13

FADER IN 1

12

11

TONE OUT 1

10

VOL IN 1

9

SEL OUT 1

1-42 (No.49793)

DEFN OUT 2

IND 2

INC 2

INB 2

INA 2

DEFN IN 2

DEFP IN 2

AVDD

29

30

31

32

33

34

35

36

50K

50K

50K

50K

­+

VCC

+ -

51K

51K

- +

25.5K

REF

25.5K

+ -

30K 30K

+ -

- +

25.5K25.5K

51K

51K

-

+

50K

50K

50K

50K

8

DEFN OUT 1

IND 1

7

INC 1

6

5

INB 1

4

INA 1

3

DEFN IN 1

DEFP IN 1

2

1

REF

• Pin function

Pin No. Symbol Function

1 REF IC signal GND

2 DEFP IN 1 Ope amp positive input

3 DEFN IN 1 Ope amp negative input

4 INA 1 Input selector ch1 input terminal

5 INB 1 Input selector ch1 input terminal

6 INC 1 Input selector ch1 input terminal

7 IND 1 Input selector ch1 input terminal

8 DEFN OUT 1 Operation outoutterminal (-)

9 SEL OUT 1 Input selector output terminal

10 VOL IN 1 Volume 1 input terminal

11 TONE OUT 1 Tone output terminal

12 FADER IN 1 Volume 2 input terminal

13 REAR OUT1 Fader volume (rear) output terminal

14 FRONT OUT 1 Fader volume (front) output terminal

15 NonFadaer OUT 1 Non fader volume output terminal

16 GND GND

17 DATA Control data input terminal

18 VDDOUT 1 Connect to GND with capacitor

19 VDDOUT 2 Connect to GND with capacitor

20 CLOCK Serial data clock input terminal

21 VDD VDD for digital

22 NonFadaer OUT 2 Non fader volume output terminal

23 FRONT OUT 2 Fader volume (front) output terminal

24 REAR OUT2 Fader volume (rear) output terminal

25 FADER IN 2 Volume 2 input terminal

26 TONE OUT 2 Tone output terminal

27 VOL IN 2 Volume 1 input terminal

28 SEL OUT 2 Input selector output terminal

29 DEFN OUT 2 Ope amp output terminal (-)

30 IND 2 Input selector switch ch2 input terminal

31 INC 2 Input selector switch ch2 input terminal

32 INB 2 Input selector switch ch2 input terminal

33 INA 2 Input selector switch ch2 input terminal

34 DEFN IN 2 Ope amp negative input terminal

35 IEFP IN 2 Ope amp positive input terminal

36 VCC VCC for analog

(No.49793)1-43

4.11 LC75878W (IC601) : LCD driver

• Pin layout

100 ~ 76

1

75

• Block diagram

~

25

OSC

VLCD

VLCD0

VLCD1

VLCD2

VLCD3

VLCD4

VDD

VSS

26 ~ 50

P1

GENERAL

GENERATOR

CONTRAST

ADJUSTER

PORT

CLOCK

~

51

P4

COM1

COMMON

DRIVER

COM8

S75/COM9

S74/COM10

S73

SEGMENT DRIVER & LATCH

CONTROL

REGISTER

SHIFT REGISTER

CCB

INTERFACE

S1

DI

CL

• Pin function

INH

No. Symbol I/O Function

1~73 SEG1~SEG73 O Segment driver output pin.

74 SEG74 O Segment driver output pin.

75 SEG75 O Segment driver output pin.
76~83 COM8~COM1 O Common driver output pin.
84~87 P1~P4 O General-purpose output pin.

88 VDD - Logic block power supply pin.

89 VLCD - LCD driver power supply pin.

90 VLCD0 O LCD driver bias 4/4 voltage (H-level) power pin.

91 VLCD1 I LCD driver bias 3/4 voltage (intermediate level) power pin.

92 VLCD2 I LCD driver bias 2/4 voltage (intermediate level) power pin.

93 VLCD3 I LCD driver bias 1/4 voltage (intermediate level) power pin.

94 VLCD4 I LCD driver bias 0/4 voltage (L-level) power pin.

95 VSS - Power supply pin to connect to ground.

96 OSC I/O Oscillator pin.

97 LCD RESET I Display off general-purpose output port "L" fixed input pin.

98 CE I Chip enable

99 CL I Synchronization clock

100 DI I Transfer data

CE

1-44 (No.49793)

4.12 NJM4565V-X (IC1572) : Dual ope amp

• Terminal layout & Pin function

1

8

A

2

+

-

7

B

3

+

-

4

4.13 NJU7241F25 (IC1651) : Regulator

• Pin Layout • Block Diagram

6

5

1

AOUTPUT

2

A-INPUT

3

A+INPUT

4

V

5

B+INPUT

6

B-INPUT

7

B OUTPUT

8

V

GND 1

VIN 2

VOUT 3

4.14 NJU7241F33 (IC1504) : Voltage regulator

PIN FUNCTION

1

2

3

5

4

1. GND

IN

2. V

3. VOUT

4. NC

5. STB

5 STB

4 NC

VIN 2

STB 5

GND 1

Short protect

3 VOUT

Vref

1 GND

(No.49793)1-45

4.15 TA2157FN-X (IC1601):RF amp

• Terminal layout

24 ~ 13

1 ~ 12

• Block diagram

13

14

15

16

17

18

19

20

21

10pF

40k30k

20k 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

1-46 (No.49793)

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.

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.49793)1-47

4.16 TC94A14FA (IC1621) : 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.

1-48 (No.49793)

Pin

Symbol I/O Descroption

No

17 TMAX O TMAX detection result output pin.

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.49793)1-49

4.17 TC94A20F-011 (IC1652) : DAC/SRAM built in type D-ROM decoder+ MP3 decoder

• Pin layout

48 33

49

32

• Block diagram

64

17

116

32 31 30 29 28

33

34

35

36

General output

37

38

39

DIT

port

2sets

Address calc.

27

Bus

Switch

register

C-Pointer

register

Y-Pointer

register

X-Pointer

25

26

DAC DAC

24

22 21

23

ALU

20 19 18 17

A2A1A0 A3

16

15

14

13

12

11

Audio I/F

10

40

41

Flag

42

43

Timer

44

control

45

46

47

48

Interrupt

DRAM I/F

General

inputbport

ERAM

2k word

*7

CROM

4k word

Y-RAM

4k word

X-RAM

4k word

SRAM I/F

1Mbit

SRAM

I/F

SubCode

register

X0 X1 X2

PRAM

Y0 Y1 Y2

256word

MX AX AYMY MZ

Program

PROM

VCO

control

4k*3

=12k word

MAC

Timing

generator

round & limit round & limit

decoder

Instruction

Microcom. I/F

9

8

7

6

5

4

3

2

1

1-50 (No.49793)

51

52

5049

53

5857565554

6059

6261

64

63

• Pin functions

Pin No Symbol I/O Functions

1 /RESET I Hard reset input H:normal L:reset
2 MiMD I Micon I/F mode select input
3 /MiCS I Micon I/F chip select input
4 /MiLP I Micon I/F latch palus input
5 MiDio I/O Micon I/F data input/output
6 /MiCK I Micon I/F clock input
7 MiACK O Micon I/F acknowledge output
8 VDDT - Power supply for digital (3.3V)

9 SDo O Data output
10 BCKo O Bit output
11 LRCKo O LR clock output
12 SDiO I Data input 0
13 BCKiA I Bit clock input A
14 LRCKiA I LR clock input A
15 SDiL I Data input terminal 1
16 BCKiB I Bit clock input terminal B
17 LRCKiB I LR clock input terminal B
18 VDD - Power supply for digital (2.5V)
19 STANBY I Standby mode control input H:STBY L:normal
20 VSS - GND for digital
21 VSSL - GND for DAC Lch
22 VRAL - Reference voltage for DAC Lch
23 LO O DAC Lch output

24,25 VDAL,VDAR - Power supply for DAC Lch/Power supply for DAC Rch (2.5V)

26 RO O DAC Rch output
27 VRAR - Reference voltage for DAC Rch
28 VSSR - GND for DAC R ch
29 TESTP I Test terminal H:test mode L:normal
30 TXO O SPDIF output

31~34 Po0~Po3 O General purpose output 0 ~ 3

35 VDDT - Power supply for digital (3.3V)

36~38 Po4~Po6 O General purpose output 4 ~ 6

39 REQ O REC terminal
40 VSS - GND for digital
41 IRO I/O External interrupt input
42 VDDM - Internal 1Mbit SRAM power supply (2.5V)

43,44 Fi0,Fi1 I Flug input 0,1

45 VSSM - GND for internal 1Mbit SRAM

46,47 Pi0,Pi1 I General ourpose input 01

48 VSS - GND for digital

49,50 Pi2,Pi3 I General purpose input 23

51 Pi4/CLCL I General purpose input 4/SUBQ I/F clock inputoutput
52 VDD - Power supply for digital (2.5V)
53 Pi5/DATA I General purpose input 5/SUBQ I/F data input
54 TSTiN/SFSY I Test terminal/SUBQ I/F flame sync input
55 Fi2/SBSY I Flug input 2/SUBQ I/F block sync input
56 VSSP - GND for VCO
57 Pdo O PLL phase error detection signal output
58 Vcoi I VCO control voltage input
59 VDDP - Power supply for VCO (2.5V)
60 CKo/CKi I/O External clock input/Clock output terminal
61 VDDX - Power supply for X'tal oscillator (2.5V)

62,63 Xi,Xo I,O Oscillator connection terminal for input/output

64 VSSX - GND for oscillator

(No.49793)1-51

4.18 UPD784217AGC208 (IC962) : Main micon

• Pin Layout

100 ~ 76

1

~

25

26 ~ 50

• Pin functions

Pin No Symbol I/O Function

1NC-Not use
2NC-Not use
3NC-Not use
4NC-Not use
5NC-Not use
6NC-Not use
7 DIM_OUT O DIMMER pulse control output
8 ILLUM1 O POWER ON:H,FLAT PANEL:L

9VDD-5V
10 X2 ­11 X1 ­12 VSS - GND
13 XT2 ­14 XT1 ­15 RESET I Reset detection teaminal
16 CD_P.REQ I CD mechanical switch 1 detection signal input
17 BUS_NT I J-BUS int
18 PS2 I POWER SAVE2. Operating together with BACKUP.H input:STOP
19 H.REMOCON I Pulse signal for CRUISE input(only in 330R)
20 RDS_SCK I RDS clock input
21 RDS_ DA I RDS data input
22 REMOCON I Remocon input(111R:READY)
23 AVDD - 5V
24 AVREF0 - 5V
25 TEMP I Temperature detection input
26 KEY0 I Key input 0
27 KEY1 I Key input 1
28 KEY2 I Key input 2
29 LEVEL I Level meter input
30 MRC I MRC output voltage detection
31 SQ I S.QUALITY level input
32 SM I S.METER level input
33 AVSS - GND
34 NC - Not use
35 DOT_CNT O Dot matrix contrast adjustment analog output
36 AVREF - 5V
37 BUS_SI I J-BUS data input
38 BUS_SO O J-BUS data output
39 BUS_SCK I/O J-BUS clock input and output
40 NC - Not use

75

~

51

1-52 (No.49793)

Pin No Symbol I/O Function

41 LCD_DA O Data output to LCD driver
42 LCD_SCK O Clock output to LCD driver
43 LCD-CE1 O Chip enable output 1 to LCD driver
44 BUZZER O Buzzer output
45 12C_DAI I 12C communication data input
46 12C_DAO O 12C communication data output
47 12C-CLK O 12C communication clock output
48 BUS-I/O O J-BUSI/O signal terminal
49 TMO O Tray motor negative signal output terminal
50 TM1 O Tray motor positive signal output terminal
51 DMO O Motor control signal output in door down
52 DM1 O Motor control signal output in door up
53 ST I Stereo signal input L:Stereo
54 NC - Not use
55 AFCK O AF check output AF check:L
56 C_SW1 I Chameleon machanical switch 1 detection signal input
57 C_SW2 I Chameleon machanical switch 2 detection signal input
58 C_SW3 I Chameleon machanical switch 3 detection signal input
59 C_SW4 I Chameleon machanical switch 4 detection signal input
60 C_SW5 I Chameleon machanical switch 5 detection signal input
61 VOL1 I Rotary volume signal 1 input
62 VOL2 I Rotary volume signal 2 input
63 SEEK/STP O Auto seek/stop selection output SEEK:L STOP:H
64 NC - Not use
65 FM/AM - FM/AM selection output FM:H AM:L
66 PLL_CE O IC control CE output
67 PLL_DO O IC control data output
68 PLL_CLK O IC control clock output
69 PLL_DI I IC control data input
70 TEL_MUTE I Telephone mute detection input
71 NC - Not use
72 VSS - GND
73 DIM_IN I Dimmer detection input L:dimmer ON
74 PS1 I Power save 1 Operating together with ACC.Power save :L Operating :H
75 POWER O Power ON/OFF selection output Power ON:H
76 CD_ON O CD power supply control signal output CD:H
77 MUTE O Mute output MUTEON:L
78 CD_RESET O Subwoofer cut off frequency control output 1
79 CD_MUTE O Subwoofer cut off frequency control output 2
80 NC - Not use
81 VDD - 5V
82 VOL_DA O data output terminal
83 VOL_CLK O clock signal output terminal
84 CF-SEL O FM band filter selection signal output
85 NC O Not use
86 LCD_RST O Reset signal output to LCD driver

87~93 NC - Not use

94 TEST - GND

95~100 NC - Not use

(No.49793)1-53

4.19 UPD784225GK-629 (IC1501) : CPU

• Pin layout

60 ~ 41

61

40

~

80

1 ~ 20

~

21

• Pin function

Pin No. Symbol I/O Function

1 TEMP IN I Temp. detection input terminal

2,3 - - No use

4 AVSS - GND

5 ADCONT O Output H level during power on. During stop mode:L

6---

7 AVREF1 - 3.3V

8 EPROMDI I EEPROM data input terminal

9 EPROMDO O EEPROM data output terminal. Output H level during input

10 EPROMCK I/O EEPROM clock signal input/output terminal

11 LCD CE O Chip enable output for LCD driver

12 LCD DA O Data output for LCD driver

13 LCD CK O Clock output for LCD driver

14 BUS I/O O JVC BUS input/output control terminal (negative)

15 BUS I/O O JVC BUS input/output control terminal

16 BUS SI I JVC BUS data input terminal

17 BUS SO O JVC BUS data output terminal

18 BUS SCK I/O JVC BUS clock input/output terminal

19 BUSOUT O JVC BUS BUSOUT output terminal

20 CD ON O Power supply (3.3V) control for CD

21 CD REQ O CD mechanism power supply on request signal output terminal

22 CD MUTE O CD mute signal output terminal

23 - - -

24 DSP RESET O CD DSP reset signal output terminal

25 CCE O CD DSP chip enable output terminal

26 BUCK O CD DSP data clock output terminal

27 BUS3 I/O CD DSP data 3 input/output terminal

28 BUS2 I/O CD DSP data 2 input/output terminal

29 BUS1 I/O CD DSP data 1 input/output terminal

30 BUS0 I/O CD DSP data 0 input/output terminal

31 2X PLAY O RF frequency response select output of 2x speed playback

32 RW SEL O CD-RW select output terminal (RW:L)

33 VSS1 - GND

34 LD O Loading signal output terminal (L:loading, H:eject)

35 LD/FE O Loading/Feed select signal output terminal (H:LD, L:FE)

36 MP3 DI I CD MP3 data input terminal

37 MP3 DO O CD MP3 data output terminal

38 MP3 CK O Clock signal output terminal for CD MP3 data

1-54 (No.49793)

Pin No. Symbol I/O Function

39 MP3 RESET O CD MP3 reset signal output terminal

40 MP3 STB O CD MP3 standby signal output terminal (H:Standby)

41~43 - - -

44 DAC ML O DAC mode control latch output terminal

45 DAC MC O DAC mode control BCK output terminal

46 DAC MD O DAC mode control data output terminal

47 DAC CS O DAC chip select output terminal

48~51 - - No use

52 DISC SEL I 8cm disc correspondence mode select terminal (correspondence:L)

53 DAC SEL I DAC select mode input terminal

54 - - -

55 TEST MODE I LCD/AD key/Remocon invalid select mode input terminal L:invalid

56 MP3 SEL I MP3 select mode input terminal

57 8V DET I CD mechanism power supply detection terminal (L:8V on)

58 REST I CD mechanism rest switch input terminal

59 SW2 I CD mechanism SW2 input terminal

60 RESET I Reset signal input terminal

61 SW1 I CD mechanism SW1 input terminal

62 B.DET I Backup power supply detection input terminal (H:Stop mode)

63 P.DET I Main power off detection input terminal (H:HALT mode)

64 BUS INT I JVC BUS communication start interrupt input terminal

65 MP3 REQ I CD MP3 request signal input terminal

66 - - -

67 VSS0 - GND

68 VDD1 - 3.3V

69 X2 O Oscillator (6MHz)

70 X1 I Oscillator (6MHz)

71 VPP - GND

72 XT2 O Open

73 XT1 I GND

74 VDD0 - 3.3V

75 AVDD - Connect to ADCONT (Power supply for A/D convertor)

76 IOP I Pickup IOP measurement input terminal

77 KEY0 I Key input 0 (8bit A/D input) terminal

78 KEY1 I Key input 1 (8bit A/D input) terminal

79 KEY2 I Key input 2 (8bit A/D input) terminal

80 KET3 I Key input 3 (8bit A/D input) terminal

(No.49793)1-55

4.20 PCM1716E-X (IC1571) : D/A converter

O

• Pin layout

28 15

114

• Block diagram

BCK

LBCK

DATA

ML/llS
MC/DM1
MD/DM0

CS/WO

MODE

MUTE

RST

Serial

Input

I/F

Mode

Control

I/F

8X Oversampling

Digital Filter

with

Function Controller

SCK

BPZ-Cont

Crystal OSC

XTI XTO CLKO Vcc1 VccAGND1 DGND

• Pin function

Pin

Symbol I/O Function

No.

1 LRCK I LRCK clock input

2 DATA I Serial audio data input

3 BCK I Bit clock input for serial audio data

4 CLKO O Buffered output of system clock

5 XTI I Oscillator input / External clock input

6 XTO O Oscillator output

7 DGND - Digital ground

8 VDD - Digital power +5V

9 VDD2R - Analog power +5V

10 AGND2R - Analog ground

11 EXTR O Rch common pin of analog output amp

12 NC - Non connection

13 VOUTR O Rch analog voltage output of audio signal

14 AGND1 - Analog ground

15 Vcc1 - Analog power +5V

Mult-level

Delta-Sigma

Modulator

Pin

No.

Vcc2L

DAC

DAC

Power Supply

Symbol I/O Function

AGND2L

Open drain

Vcc2R

AGND2R

Low-pass

Filter

Low-pass

Filter

VoutL

EXTL

VoutR

EXTR

ZER

16 VOUTL O Lch analog voltage output of audio signal

17 NC - Non connection

18 EXTL O Lch common pin of analog output amp

19 AGND2L - Analog ground

20 Vcc2L - Analog power +5V

21 ZERO O Zero data flag

22 RST I Reset

23 CS/IWO I Chip select / Input format selection

24 MODE I Mode control select

25 MUTE I Mute control

26 MD/DM0 I Mode control, Data /

De-emphasis selection 1

27 MC/DM1 I Mode control, BCK /

De-emphasis selection 2

28 ML/IIS I Mode control, WDCK /

Input format selection

1-56 (No.49793)

(No.49793)1-57

VICTOR COMPANY OF JAPAN, LIMITED

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

(No.49793)

Printed in Japan

WPC