JVC VS-DT7R Service Manual

SERVICE MANUAL

COMPACT COMPONENET SYSTEM

VS-DT7R

VS-DT7R

123

4

5

8

7

10

SET

MD/AUX

PTY

PTY

SEARCH

SELECT

DISPLAY

FM/AM

MODE

CLOCK
/TIMER

STANDBY/ON

PLAY MODE

6

REPEAT

9

FM MODE

10

+

TREBLEBASS

CANCEL

TA/NEWS

/INFO

SLEEPDIMMER

DISPLAYAHB PRO

OPEN/
CLOSE

VOLUME

COMPACT COMPONENT SYSTEM

CA-VSDT7RSP-VSDT6 SP-VSDT6

Area suffix

E
EN

Continental Europe

Northern Europe

COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.

No.21119

Jul. 2002

VS-DT7R

TABLE OF CONTENTS

1 Important safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Warning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.3 Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.4 Critical parts for safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.5 Preventing static electricity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.6 Handling the traverse unit (optical pickup) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.7 Attention when traverse unit is decomposed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.8 Important for laser products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.1 Main body section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.2 Front panel assembly section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.3 CD mechanism assembly section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3 Adjustment method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.1 Flow of functional operation until TOC read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.2 Maintenance of laser pickup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.3 Replacement of laser pickup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4 Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.1 MN101CP30AKJ (IC701) : System control microcomputer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.2 KIA78S06P (IC702) : Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.3 MN662790RSC (IC651) : Digital servo & Digital signal prossesor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.4 UPC78L05J-T (IC191) : Three terminal voltage regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.5 UPD780024AGKB62 (IC251) : Unit microcomputer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.6 LA4905 (IC301) : 2ch BTL power IC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.7 LB1641 (IC108) : DC motor driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.8 MN101CP35DKB (IC811) : FL driver microcomputer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.9 BA15218F (IC102) : Dual operational amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.10 AN22000A (IC601) : RF & Servo amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.11 LA1838 (IC1) : FM AM IF amplifier & Detector, FM MPX Decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.12 LA6575H (IC801) : Focus & Spindle & Feed & Tracking BTL driver . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.13 GP1FA550TZ (J3601) : Fiber optic transmitter/Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.14 LC72136N (IC2) : PLL frequency synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.15 LC72723 (IC3) : RDS decoder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.16 NJM4580D-D (IC101) : Dual operational amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.17 RPM6938-SV4 (IC801, IC802, IC812) : Remote control receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.18 LC75342M (IC501) : E. volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.19 XC62HR3502P (IC291) : Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

2

SECTION 1

Important safety precautions

1.1 Safety Precautions

(1) This design of this product contains special hardware and

many circuits and components specially for safety purposes.
For continued protection, no changes should be made to the
original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be
performed by qualified personnel only.

(2) Alterations of the design or circuitry of the product should

not be made. Any design alterations of the product should
not be made. Any design alterations or additions will vo id
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.

(3) Many electrical and mechanical parts in the products have

special safety-related characteristics. These characteris­tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by
using replacement components rated for higher voltage,
wattage, etc. Replacement parts which have these specia l
safety characteristics are identified in the Parts List of Service
Manual. Electrical components having such features are
identified by shading on the schematics and by ( )
on the Parts List in the Service Manual. The use of a sub­stitute replacement which does not have the same safety
characteristics as the recommended replacement parts
shown in the Parts List of Service Manual may create
shock, fire, or other hazards.

(4) The leads in the products are routed and dressed with ties,

clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassembling.

(5) Leakage shock hazard testing)

After reassembling the product, always perform an isolation
check on the exposed metal parts of the product (antenna
terminals, knobs, metal cabinet, screw heads, headphone
jack, control shafts, etc.) to be sure the product is safe to
operate without danger of electrical shock.
Do not use a line isolation transformer during this check.

• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particu­larly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage
current must not exceed 0.5mA AC (r.m.s.).

• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000 ohms per volt or more sen­sitivity in the following manner. Connect a 1,500 10W
resistor paralleled by a 0.15 F AC-type capacitor be­tween an exposed metal part and a known good earth
ground.

VS-DT7R

Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).

1.2 Warning

(1) This equipment has been designed and manufactured to

meet international safety standards.

(2) It is the legal responsibility of the repairer to ensure that

these safety standards are maintained.

(3) Repairs must be made in accordance with the relevant

safety standards.

(4) It is essential that safety critical components are replaced

by approved parts.

(5) If mains voltage selector is provided, check setting for lo-

cal voltage.

1.3 Caution
Burrs formed during molding may be left over on some

parts of the chassis.
Therefore, pay attention to such burrs in the case of pre­forming repair of this system.

1.4 Critical parts for safety

In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identi fied by the " " mark nearby are critical
for safety.
When replacing them, be sure to use the parts of the same type
and rating as specified by the manufacturer. (Except the JC version)

3

VS-DT7R

1.5 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.

1.5.1 Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser dio de) 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 pl ate 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.

(3) Handling the optical pickup

(1) In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement op-

tical pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)

(2) 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.

1.6 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 usin g nippers, etc. after rep lacing the optica l 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

1.7 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 w ithout 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.

4

1.8 Important for laser products

(1) CLASS 1 LASER PRODUCT
(2) DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

(3) CAUTION : There are no serviceable parts inside the

Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.

(4) CAUTION : The compact disc player uses invisible laser

radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are de feated.
It is dangerous to defeat the safety switches.

VARNING

Osynlig laserstrålning är denna del är öppnasd och spårren är
urkopplad. Betrakta ej strålen.

VARO

Avattaessa ja suojalulitus ohitettaessa olet alttiina näkymät­tömälle lasersateilylle. Älä katso säteeseen.

REPRODUCTION AND POSITION OF LABEL and PRINT

WARNING LABEL

VS-DT7R

(5) CAUTION : If safety switches malfunction, the laser is able

to function.

(6) CAUTION : Use of controls, adjustments or performance

of procedures other than those specified herein may result
in hazardous radiation exposure.

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

ADVARSEL

Usynlig laserstrling ved åbning, når sikkerhedsafbrydere er ude
af funktion. Undgå udsasttelse for stråling.

ADVARSEL

Usynlig laserstråling ved åpning, når sikkerhetsbryteren er avs­lott. unngå utsettelse for stråling.

5

VS-DT7R

SECTION 2

Disassembly method

2.1 Main body section

2.1.1 Removing the top lens [VS-DT9R only]
(See Figs.2-1)

From the top side of the main body, remove the four screws A
attaching the top lens.

2.1.2 Removing the bottom panel
(See Figs. 2-2 and 2-3.)

• Remove the top lens. [VS-DT9R only]

(1) From the rear side of the main body, remove the three

screws B attaching the bottom panel.

(2) From the bottom side of the main body, remove the two

screws C attaching the bottom panel.

(3) Remove the bottom panel in an upw ard direction.

Fig.2-1

2.1.3 Removing the top panel
(See Fig. 2-4.)

• Remove the top lens. [VS-DT9R only]

• Remove the bottom panel.

(1) Slide the top panel toward the rear (direction of the arrow)

and disengage it from the engagement sections a and b of
the bottom chassis.

(2) Remove the top panel in an upward direction.

Fig.2-2

Fig.2-3

Fig.2-4

6

2.1.4 Removing the CD mechanism assembly
(See Fig. 2-5.)

• Remove the top lens. [VS-DT9R only]

• Remove the bottom panel.

• Remove the top panel.

(1) From the top side of the main body, disengage the claw c

of the CD mechanism assembly and then remove the push
button.

(2) Remove the six screws D and screw E attaching the CD

mechanism assembly.

(3) Disconnect the wire from connector CN802 on the LED

board.

(4) Remove the CD mechanism assembly in an upward direc-

tion.

2.1.5 Removing the front panel assembly
(See Figs. 2-6 and 2-7.)

• Remove the top lens. [VS-DT9R only]

• Remove the bottom panel.

• Remove the top panel.

• Remove the CD mechanism assembly.

(1) Remove the tie band bundling the wires of the front panel

assembly.

(2) Disconnect the wires from connectors CN106 and CN182

on the main board.

(3) Disconnect the card wires from connectors CN171 and

CN183 on the main board.

(4) Remove the wire holder holding the card wire of the front

panel assembly.

(5) From the front side of the main body, remove the two

screws F attaching the front panel assembly.

(6) Disengage the claws d of the front panel assembly from

the bottom chassis and then remove the front panel as­sembly in the direction of arrow.

[Reference]

• Before attaching the front panel assembly, pass the card

wire of the front panel assembly through the hole on the
bottom chassis.

• After attaching the front panel assembly, bundling the

card wire and wires of the front panel assembly using a
wire holder and tie band.

VS-DT7R

Fig.2-5

Fig.2-6

Fig.2-7

7

VS-DT7R

2.1.6 Removing the tuner board
(See Figs. 2-8 and 2-9.)

• Remove the top lens. [VS-DT9R only]

• Remove the bottom panel.

• Remove the top panel.

• Remove the CD mechanism assembly.

(1) Disconnect the card wire from connector CN111 on the

main board.

(2) From the rear side of the main body, remove the two

screws G attaching the FM/AM antenna terminals on the
tuner board.

(3) Take out the tuner board from the bottom chassis. 3.

2.1.7 Removing the speaker board
(See Figs. 2-8 and 2-9.)

• Remove the top lens. [VS-DT9R only]

• Remove the bottom panel.

• Remove the top panel.

• Remove the CD mechanism assembly.

(1) Remove the tie band bundling the wires on the speaker

board.

(2) Disconnect the wires from connectors CN101 and CN102

on the speaker board.

(3) From the rear side of the main body, remove the three

screws H attaching the speaker/digital out terminals on the
speaker board.

(4) Take out the speaker board from the bottom chassis.

[Reference]

• After connecting the wires to the speaker board, bundle

them using a tie band.

• Insert the CD mechanism assembly wire into the notch on

the bottom chassis. (See Fig. 2-8.)

Fig.2-8

Fig.2-9

8

2.1.8 Removing the main board
(See Figs. 2-10 and 2-11.)

• Remove the top lens. [VS-DT9R only]

• Remove the bottom panel.

• Remove the top panel.

• Remove the CD mechanism assembly.

• Remove the front panel assembly.

• Remove the tuner board.

• Remove the speaker board.

(1) Disconnect the wire from connector CN192 on the power

amplifier board.

(2) Disengage the wire clamp bundling the wire of the power

transformer.

(3) Disconnect the wires from connectors CN181, CN191 and

CN194 on the main board.

(4) Remove the screw J, which retains the main board, to-

gether with the wire holder.

(5) Remove the three screws K and screw K' attaching the

main board.

(6) Remove the two screws L attaching the main board and

then remove the rear panel.

(7) Take out the main board from the bottom chassis.

[Reference]Attaching the main board

• When attaching the screw K', attach the earth wire of th e

main board at the same time.

• When attaching the screw J, also attach the wire holder

together with it.

• After connecting the wires to the connectors CN192 and

CN193 on the power amplifier board, bundle them using
wire holder.

2.1.9 Removing the power amplifier board
(See Fig. 2-12.)

• Remove the top lens. [VS-DT9R only]

• Remove the bottom panel.

• Remove the top panel.

• Remove the CD mechanism assembly.

(1) Disconnect the wires from connectors CN192 and CN193

on the power amplifier board.

(2) Remove the two screws M attaching the fan motor.

[Reference]

• It is not necessary to remove the wire from the fan
motor.

(3) Remove the two screws N attaching the power amplifier

board.

(4) Lift the power amplifier board, disengage the hook e from

the heat sink of the main board and take out the power am­plifier board.

VS-DT7R

Fig.2-10

Fig.2-11

Fig.2-12

9

VS-DT7R

2.1.10 Removing the power transformer
(See Fig. 2-13.)

• Remove the top lens. [VS-DT9R only]

• Remove the bottom panel.

• Remove the top panel.

• Remove the CD mechanism assembly.

(1) Disengage the wire clamp and tie band bundling the wires

of the power transformer.

(2) Disconnect the wire from connector CN192 on the power

amplifier board.

(3) Disconnect the wires from connectors CN191 and CN194

on the main board.

(4) Remove the two screws P attaching the power transform-

er.

[Reference]

• After connecting the wires, bundling them using a wire

clamp and tie band.

2.1.11 Removing the fan motor
(See Figs. 2-13 and 2-14.)

• Remove the top lens. [VS-DT9R only]

• Remove the bottom panel.

• Remove the top panel.

• Remove the CD mechanism assembly.

• Remove the front panel assembly.

(1) Disconnect the wire from connector CN181 on the main

board.

(2) From the right side of the main body, remove the two

screws M attaching the fan motor.

[Reference]
After mounting the fan motor, treat the wire from the fan
motor as shown in fig. 2-13.

Fig.2-13

Fig.2-14

10

2.2 Front panel assembly section

• Remove the top lens. [VS-DT9R only]

• Remove the bottom panel.

• Remove the top panel.

• Remove the CD mechanism assembly.

• Remove the front panel assembly.

2.2.1 Removing the front switch board
(See Fig. 2-15.)

From the back side of the front panel assembly, remove the four
screws Q attaching the front switch board.

2.2.2 Removing the door switch board
(See Figs. 2-15 and 2-16.)

(1) From the back side of the front panel assembly, remove

the two screws R attaching the door motor assembly.

(2) Remove the screw S attaching the door switch board o f

the door motor assembly.

2.2.3 Removing the door motor
(See Fig. 2-16.)

• Remove the door motor assembly.

(1) Remove the stop washers attaching the clutch assembly

and gear 2.
(2) Remove the clutch assembly, washer and Gear 2.
(3) Remove the two screws T attaching the door motor.

2.2.4 Removing the front board
(See Figs. 2-17 to 2-20.)

(1) While widening section f of the front base in the direction

of the arrow, remove the rod gear assembly.

(2) Slide the moving panel assembly all the way in the direc-

tion of the arrow.

(3) While slightly widening section g toward the front, take out

the moving panel assembly in the direction of the arrow.

(4) Remove the two screws W attaching the moving base of

the moving panel assembly.

(5) Disengage the engagement sections h on the inside of the

moving base and at the inside of the moving panel assem-

bly and remove the moving base.
(6) Remove the two screws X attaching the front board.
(7) Disengage the claw i of the moving panel and remove the

front board.

[Reference]

• Before attaching the moving base, pass the card wire of

the front board through the hole on the moving base. (See
Fig.2-19.)

VS-DT7R

Fig.2-15

Fig.2-16

Fig.2-17

Fig.2-18

Fig.2-19

Fig.2-20

11

VS-DT7R

2.3 CD mechanism assembly section

2.3.1 Removing the LED board
(See Fig. 2-21.)

From the top side of the CD mechanism assembly, disengage
the claw a of the top chassis attaching the LED board and then
remove the LED board.

2.3.2 Removing the CD mechanism assembly
(See Fig. 2-22.)

(1) From the back side of the CD mechanism assembly, re-

move the three screws A attaching the CD mechanism as­sembly on the top chassis.

(2) Raise the protector in the direction of arrow and then re-

move the CD mechanism assembly.

Fig.2-21

2.3.3 Removing the CD servo board
(See Fig. 2-23.)

[Caution]

• Be sure to solder the short land section b on the flexible

wire before disconnecting the flexible wire from connec­tor CN601 on the CD servo board.
If the flexible wire is disconnected without attaching sol­der, the pickup unit may be destroyed by static electricity.

(1) From the back side of the CD mechanism assembly, at-

tach solder to the short land section b of the flexible wire
that is connected to the connector CN601 of the CD servo
board.

(2) Disconnect the flexible wire from connector CN601 on the

CD servo board.

(3) Disconnect the card wires from connectors CN611 and

CN612 on the CD servo board.
(4) Remove the two screws B attaching the CD servo board.
(5) Lift the front edge of the CD servo board slightly and dis-

engage it from the projection c and then from the engage-

ment section d.

[Caution]

• In the assembly, be sure to remove solder from the short

land section b after connecting the flexible wire.

Fig.2-22

Fig.2-23

12

2.3.4 Removing the traverse mechanism assembly
(See Fig. 2-24.)

• Remove the CD servo board.

(1) Remove the two screws C attaching the CD servo board

bracket.

(2) Remove the two screws D attaching the traverse mecha-

nism assembly.

(3) Disengage the claw e attaching the traverse mechanism

assembly and then take out the traverse mechanism as­sembly.

2.3.5 Removing the pickup unit
(See Figs. 2-25 and 2-26.)

• Remove the CD servo board.

• Remove the traverse mechanism assembly.

(1) From the top side of the traverse mechanism
(1) assembly, remove the two screws E attaching the

shaft.

(2) From the traverse mechanism assembly, disengage the

section f of the pickup unit and then remove the pickup unit

with the shaft.
(3) Pull the shaft out of the pickup unit.
(4) Remove the screw F attaching the rack plate from the

pickup unit.
(5) Remove the screw G attaching the P.S. spring from the

pickup unit.

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Fig.2-24

Fig.2-25

Fig.2-26

13

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2.3.6 Attaching the pickup unit
(See Figs. 2-27 and 2-28.)

[Reference]
Refer to the explanation of "Remov ing the pickup u nit" on
the preceding page.

(1) Attach the P.S. spring and rack plate to the pickup unit.
(2) Insert the shaft into the pickup unit.
(3) Engage the section f of the pickup unit with the traverse

mechanism assembly first, and set the both ends of the
shaft in the grooves g and h.

(4) After making sure that the section j of the rack plate is

meshed correctly with the middle gear, attach the shaft us­ing the two screws E.

Fig.2-27

2.3.7 Removing the traverse mechanism board
(See Fig.2-29 .)

• Remove the CD servo board.

• Remove the traverse mechanism assembly.

(1) From the back side of the traverse mechanism assembly,

disconnect the feed motor wires that are soldered on the
traverse mechanism board.

(2) Remove the two screws H attaching the traverse mecha-

nism board.

2.3.8 Removing the feed motor
(See Fig. 2-29.)

• Remove the CD servo board.

• Remove the traverse mechanism assembly.

(1) From the back side of the traverse mechanism assembly,

disconnect the feed motor wires that are soldered on the
traverse mechanism board.

(2) Remove the two screws J attaching the feed motor.

Fig.2-28

Fig.2-29

14

2.3.9 Removing the switch board
(See Fig.2-30.)

• Remove the CD mechanism assembly.

(1) From the top side of the CD mechanism assembly, re-

move the screw K attaching the switch board.

(2) Lift the switch board slightly and then remove the wire from

connector CN101 on the switch board.

2.3.10 Removing the loading motor assembly
(See Figs.2-23, 2-30 to 2-32.)

• Remove the CD mechanism assembly.

(1) From the back side of the CD mechanism assembly, dis-

connect the card wire from connector CN612 on the CD
servo board. (See Fig.2-23.)

(2) From the top side of the CD mechanism assembly, re-

move the two screws L attaching the clamper base as­sembly.

(3) Disconnect the wire from connector CN101 on the switch

board while lifting the clamper base assembly slightly and
remove the clamper base assembly.

(4) Remove the three screws M attaching the roller holder as-

sembly and take out the roller holder assembly.

(5) Disconnect the wires from connectors CN103 and CN104

on the loading motor assembly.
(6) Remove the belt of the loading motor assembly.
(7) Remove the two screws N attaching the loading motor as-

sembly and take out the loading motor assembly.

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Fig.2-30

Fig.2-31

Fig.2-32

15

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Adjustment method

3.1 Flow of functional operation until TOC read

SECTION 3

16

3.2 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 below.

(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 la-

ser 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.

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3.3 Replacement of laser pickup

17

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SECTION 4

Description of major ICs

4.1 MN101CP30AKJ (IC701) : System control microcomputer

4.1.1 Terminal layout

4.1.2 Pin function

Pin No. Symbol I/O Function

1 THERM I Temperature detection, ON/OFF control of FAN_SW signal(pin 57)
2 KEY1 I Key switch input of the main body
3 KEY2 I Key switch input of the main body
4 VERSION I Switching signal for destination
5 GND - Ground
6 VREF+ - Refer ence voltage for A/D converter (Connect to VDD.)
7 VDD - Power supply for microcomputer
8 OSC2 O 8MHz main clock output

9 OSC1 I 8MHz main clock input
10 VSS - Ground for microcomputer
11 XI I 32.768kHz sub clock input
12 XO O 32.768kHz sub clock output
13 GND - Ground
14 CDTX O CD(FMU-F1) communication
15 CDRX I CD(FMU-F1) communication
16 FLRST O FL reset output
17 FLDATA I/O FL driver communication data input/output
18 FLCS O FL driver communication chip select output
19 FLCLK O FL driver communication clock output
20 STBLEDH O Standby LED for horizontal establishment (POWER_OFF/ON=H)
21 RST I Microcomputer reset input
22 STBLEDV O Standby LED for vertical establishment (POWER_OFF/ON=H)
23 FTU O Power supply for tuner
24 TUDATA I/O PLL input/output data (Connect to tuner.)
25 TUST O PLL strobe output (Connect to tuner.)
26 TUCK O PLL clock output (Conn ect to tu ne r. )
27 MPX I Stereo detection (Connect to tuner.), STEREO=L
28 RDSCK I RDS clock input (Connect to tuner.)
29 RDSI I RDS data input (Connect to tuner.)
30 REM I Remote controller input
31 GND - Ground
32 SMUTE O Mute signal, MUTE=L
33 AHB O Bass boost, ON=L, POWER_OFF=L
34 VOLDI O Data output (Connect to VOLUME_IC.)
35 VOLCE O Enable output (Connect to VOLUME_IC.)
36 VOLCL O Clock output (Connect to VOLUME_IC.)

18

37 LOMUTE O Line out mute signal, MUTE=L
38 TREMCONT I Remote controller effective signal for horizontal establishment, L : effective state
39 - Not connect
40 H-V I Detecting signal for horizontal or vertical establishment
41 - Not connect
42 - Not connect
43 - Not connect
44 CDRSI O CD reset output (Connect to FMU-F1.)
45 - Not connect
46 BLCTL - Not connect
47 PSAVE O Power save mode ON/OFF signal, SAVE=H
48 FCD - CD power supply ON/OFF, not use
49 POUT O Main power supply ON/OFF
50 TOPLED1 O LED color control (Software PWN outp ut)
51 TOPLED2 O LED color control (Software PWN outp ut)
52 STBDIM I Dimmer control for STBYLED_H/V
53 DOOR1 I Movin g panel position detecting signal, CLOSE=L
54 DOOR2 I Movin g panel position detecting signal, OPEN=L
55 +BCTL O Unnecessary power supply cut-off signal for outage, Outage=H
56 BUP I Outage dete cting signal (Backup mode)
57 FANSW O Fan motor ON/OFF signal
58 MT0 O Panel open (Motor driver)
59 MT1 O Panel close (Motor driver)
60 MTS O Panel action speed (Not use)
61 VREF- - Reference voltage for A/D converter (Connect to VSS.)
62 LOCK I Detection signal for panel action load
63 SAFETYCD I Detecting signal for CD abnormal voltage
64 SAFETY I Detecting signal for abnormal voltage

4.2 KIA78S06P (IC702) : Regulator

4.2.1 Terminal layout

4.2.2 Pin function

Pin No. Function

1 Output
2 Common
3 Input

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4.2.3 Block diagram

19

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4.3 MN662790RSC (IC651) : Digital servo & Digital signal prossesor

4.3.1 Terminal layout

4.3.2 Pin function

Pin No. Symbol I/O Function

1 BCLK O Bit clock output for SRDATA

2 LRCK O LR signal separation output

3 SRDATA O Serial data output

4 DVDD1 - Power supply for digital circuit

5 DVSS1 - GND for digital circuit

6 TX O Digital audio ineterface output

7 MCLK I Micro computer command clock signal input

8 MDATA I Micro computer command data input

9 MLD I Micro computer command load signal input (L:Load)
10 SENSE - N ot use
11 FLOCK - Not use
12 TLOCK - Not use
13 BLKCK O Sub code block signal output
14 SQCK I External clock input for sub code Q register input
15 SUBQ O Sub code Qdata output
16 /DMUTE I Muting input (H:Mute)
17 STAT O Status signal input
18 DSP_RST I Reset signal input (L:Reset)
19 SMCK - Not use
20 CSEL I Connect to DVDD1 (H fix)
21 TEST2 - Not use
22 TVD O Traverse drive output
23 PC - Not use
24 ECM O Spindle motor drive signal (Enforced mode output)
25 ECS O Spindle motor drive signal (Servo error signal output)
26 VDETMON - Not use
27 TRD O Tracking drive output
28 FOD O Focus drive output
29 VREF I Reference voltage for D/A output block
30 FBAL O Focus balance adjust signal output
31 TBAL O Tracking balance adjust signal output
32 FE I Focus error signal input (Analog input)
33 TE I Tracking error signal input (Analog input)
34 RF ENV I RF envelope signal input (analog input)
35 TEST3 I Connect to GND
36 OFT I Off track signal input (H:Off track)
37 TRCRS I Track crosssignal input
38 /RFDET I RF detect signal input (L:Detect)
39 BDO I Drop out signal input (H:Drop out)

20

40 LDON - Not use
41 PLLF2 - Not use
42 DSLBDA - Not use
43 WVEL - Not use
44 ARF I RF signal input
45 IREF I Referrence current input
46 DRF I Bias pin for DSL
47 DSLF I/O Loop filter pin for DSL
48 PLLF I/O Loop filter pin for PLL
49 VCOF I/O Loop filter pin for VCO
50 AVDD2 - Power supply for analog circuit
51 AVSS2 - GND for analog circuit
52 EFM - Not use
53 DSLB O DSL balance output
54 VCOF2 I/O Loop filter pin for Digtal servo VCO
55 SUBC - Not use
56 SBCK - Not use
57 VSS - GND for crysta l oscillation circuit
58 X1 I Input for crystal oscillation circuit (f=16.9344MHz)
59 X2 O Output for crystal oscillation circuit (f=16.9344MHz)
60 VDD - Power supply for crystal oscillation circuit
61 BYTCK - Not use
62 LD O Laser ON signal output (H : ON)
63 GAIN O Gain control output (H : CD-RW)
64 IPFLAG - Not use
65 FLAG O Flag signal output
66 CLVS - Not use
67 CRC - Not use
68 DEMPH - No t use
69 RESY - Not use
70 IOSEL I Mode select pin , Connect to DVDD1 (H fix)
71 /TEST I Test pin ,Connect to DVDD1 (H fix)
72 AVDD1 - Power supply for analog circuit
73 OUTL O L-channel audio output
74 AVSS1 - GND for analog circuit
75 OUTR O R-channel audio output
76 DQSY - Not use
77 Vcc5V - Connect to power supply
78 PSEL I I OSEL=H , Test pin , Connect to GND ( L fix)
79 MSEL I IOSEL= H , SMCK output , Frequen cy select pin
80 SSEL I I OSEL=H , SMCK output , SUBQ output mode select pin

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21

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4.4 UPC78L05J-T (IC191) : Three terminal voltage regulator

4.4.1 Terminal layout 4.4.2 Circuit diagram

4.5 UPD780024AGKB62 (IC251) : Unit microcomputer

4.5.1 Terminal layout

4.5.2 Pin function

Pin No. Symbol I/O Function

1 P50/A8 - Connect to ground

2P59/A9 -Not use

3 MCS O Synchronous/asynchronous output

4 MRDY I Ready signal input

5 CDINDEX - Not use

6 CDEMP - Not use

7 CDTNO - Not use

8 CDCOPY - Not use

9 VSSO - Ground terminal
10 VDDO - Power supply terminal
11 P30 - Not use
12 P31 - Not use
13 P32 - Not use
14 /DRMUTE O Mute signal output
15 SUBQ I Sub code Q data input
16 P35/SO31 - Not use
17 SQCK O Clock output for sub code Q register
18 KCMND I Command signal input
19 MSTAT O CD control status output
20 KCLK I CD control command clock input
21 RXDO I Command input
22 TXDO O Status output
23 P25/SCKO - Connect to ground
24 VDD1 - Power supply terminal
25 AVSS - Ground terminal
26 VDTLV I Sensitivity adjustment for vibrating detection
27 P16/ANI6 - Not use

22

28 PCHK I Voltage monitor (for safety)
29 P14/ANI4 - Connect to ground
30 P13/ANI3 - Connect to ground
31 P12/ANI2 - Connect to ground
32 /REST I Rest switch input
33 SW1 I Mechanism switch (Photo sensor)
34 AVREF - Reference voltage for analog circuit
35 AVDD - Power supply terminal for analog circuit
36 /RESET I CD control reset input
37 XT2 - Not use
38 XT1 - Connect to power supply
39 IC - Connect to ground
40 X2 - Connect to external crystal oscillator
41 X1 - Connect to external crystal oscillator
42 VSS1 - Ground terminal
43 FLAG I Flag signal input
44 BLKCK I Sub code block clock signal input
45 /RFDET I RF signal amplitude detecting signal input
46 EQx2 I Equalizer select signal input
47 EQx4 I Equalizer select signal input
48 P71/TIO1 - Not use
49 FWD O Loading (EJECT) output
50 REW O Loading (LOAD) output
51 IREFx4 O Switching signa l for IREF current (4x mode : L)
52 P75/BUZ - Not use
53 /RESET O Reset signal output (L: reset)
54 STAT I Status signal input
55 /DMUTE O Muting output
56 /P.ON O Power ON/OFF switching signal output
57 MLD O Microcomputer command load signal output
58 MDATA O Microcomputer command data output
59 MCLK O Microcomputer command clock signal output
60 P43/AD3 - Not use
61 P44/AD4 - Not use
62 P45/AD5 - Not use
63 /SW2 I Mechanism switch (Loading switch)
64 /SW3 I Mechanism switch (Chucking completion)

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23

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4.6 LA4905 (IC301) : 2ch BTL power IC

4.6.1 Terminal layput

4.6.2 Block diagram

4.7 LB1641 (IC108) : DC motor driver

4.7.1 Terminal layout 4.7.2 Pin function

Input Output

IN1 IN2 OUT1 OUT2

0000Brake
1 0 1 0 Clockwise
0 1 0 1 Counterclockwise
1100Brake

Mode

24

4.8 MN101CP35DKB (IC811) : FL driver microcomputer

4.8.1 Terminal layout

4.8.2 Pin function

Pin No. Symbol I/O Function

1 NC - Not connect
2 FLDATA I/O FL driver communication data input/output
3 FLCLK I FL driver communication clock input
4 NC - Not connect
5 FLCS I FL driver communication chip select input

6,7 NC - Not connect

8 B5V - VDD(B5V)
9 OSC2 O 8MHz main clock output

10 OSC1 I 8MHz main clock input

11,12 GND - Ground

13 NC - Not connect

14~23 GND - Ground

24 VREF - Re fere nce voltage
25 NC - Not connect
26 FLRST I FL reset input

27~30 NCV70 - Not connect

31 REMCON_HO O Switching signal for receiver part of remote controller
32 NCV70 - Not connect

33~38 GND - Ground

39,40 NCV70 - Not connect

41 KEYLEDH - Not use
42 KEYLEDV - Not use
43 KEYDIMMER - Not use

44~46 NC - Not connect

47 G1 - Not connect

48~60 G2 G14 O Grid signal outputs

61 G15 - Not connect
62~64 - Not connect
65~99 S1 S35 O Segment signal outputs

100 -VPP - VPP

4.9 BA15218F (IC102) : Dual operational amplifier

4.9.1 Terminal layout & Block diagram

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25

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4.10 AN22000A (IC601) : RF & Servo amplifier

4.10.1 Terminal layou t

4.10.3 Pin function

Pin No. Symbol Function

1 PD APC Amp. Input terminal
2 LD APC Amp.Output terminal
3 VCC Power supply terminal
4 RFN RF addition Amp.Reversing input termi nal
5 RF OUT RF addition Amp.Output terminal
6 RF IN AGC input terminal
7 C.AGC Terminal of connection of capacity of AGC loop filter.
8 ARF AGC output terminal

9 CEA Capacity connection terminal for HPF-Amp.
10 3TOUT 3TENV output terminal
11 CBDO Capacity connection terminal for RF shade side envelope detection
12 BDO BDO output te rminal
13 COFTR Capacity connection terminal for RF discernment side envelope detection
14 OFTR OFTR output terminal
15 /RFDET RFDET output terminal (Negative logic)
16 GND Earth terminal
17 VREF VREF output terminal (Not use)
18 VDET VDET output terminal (Not use)

19 TEBPF VDET input terminal
20 TEOUT TE Amp. output terminal
21 TEN TE Amp. reversing input terminal
22 FEN FE Amp. reversing input terminal
23 FEOUT FE Amp. output terminal
24 GCTRL Terminal GCTL & APC
25 FBAL FBAL control terminal
26 TBAL TBAL control terminal
27 PDE Tracking signal input terminal 1
28 PDF Tracking signal input terminal 2
29 D Focus signal input terminal 4
30 B Focus signal input terminal 2
31 C Focus signal input terminal 3
32 A Focus signal input terminal 1

4.10.2 Block diagram

26

4.11 LA1838 (IC1) : FM AM IF amplifier & Detector, FM MPX Decoder

4.11.1 Terminal layout

4.11.2 Pin function

Pin No. Symbol I/O Function

1 FM IN I This is an input terminal of FM IF signal.
2 AM MIX O This is an out put terminal for AM mixer.
3 FM IF I Bypass of FM IF
4 AM IF I Input of AM IF Signal.
5 GND - This is the device ground terminal.
6 TUNED O When the set is tunning,this terminal becomes "L".
7 STEREO O Stereo indicator output. Stereo "L", Mono: "H"
8 VCC - This is the power supply terminal.

9 FM DET - F M de tect transformer.
10 AM SD - This is a terminal of AM ceramic filter.
11 FM VSM O Adjust FM SD sensitivity.
12 AM VSM O Adjust AM SD sensitivity.
13 MUTE/IFOUT I/O When the signal of IF REQ of IC121(LC72131) appear, the signal of FM/AM IF output.

Muting control input.
14 FM/AM I Change over the FM/AM input. "H" :FM, "L" : AM
15 MONO/ST O Stereo : "H", Mono: "L"
16 LOUT O Left channel signal output.
17 ROUT O Right channel signal output.
18 LIN I Input terminal of the Left channel post AMP.
19 RIN I Input terminal of the Right channel post AMP.
20 RO O Mpx Right channel signal output.
21 LO O Mpx Left channel signal output.
22 MPX IN I Mpx input terminal
23 FM OUT O FM detection output.
24 AM DET O AM detection output.
25 AM AGC I This is an AGC voltage input terminal for AM.
26 AFC - This is an output terminal of voltage for FM-AFC.
27 AM RF I AM RF signal input.
28 REG O Register value between pin 26 and pin28 besides the frequency width of the input signal.
29 AM OSC - This is a terminal of AM Local oscillatio n circuit.
30 OSC BUFFER O AM Local oscillation Signal output.

VS-DT7R

27

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4.12 LA6575H (IC801) : Focus & Spindle & Feed & Tracking BTL driver

4.12.1 Terminal layout 4.12.2 Block diagram

4.12.3 Pin function

Pin No. Symbol Function Pin No. Symbol Function

1 VCC2 Power supply for CH3/CH4/CH5 15 VIN2 Not use
2 VO5- Loading output (-) 16 VIN2G Spindle drive input
3 VO5+ Loading output (+) 17 VIN3 Not use
4 VO4+ Tracking output (+) 18 VIN3G Focus drive input
5 VO4- Tracking output (-) 19 REG-IN Connect to power supply
6 VO3+ Focus output (+) 20 REG-OUT Not use
7 VO3- Focus output (-) 21 VREF-IN Reference voltage input terminal
8 VO2+ Spindle output (+) 22 VCCS Signal system power

9 VO2- Spindle output (-) 23 VIN4G Tracking drive input
10 VO1+ Traverse output (+) 24 VIN4 Not use
11 VO1- Traverse output (-) 25 MUTE Mute for CH1/CH2/CH3/CH4
12 VCC1 Power supply for CH1/CH2 26 S-GND Signal system ground
13 VIN1 Not use 27 FWD Loading input (EJECT)
14 VIN1G Traverse drive input 28 REW Loading input (LOAD)

4.13 GP1FA550TZ (J3601) : Fiber optic transmitter/Receiver

4.13.1 Terminal layout 4.13.2 Block diagram

28

4.14 LC72136N (IC2) : PLL frequency synthesizer

4.14.1 Terminal layout 4.14.2 Block diagram

4.14.3 Pin function

Pin No. Symbol I/O Function

1 XOUT I X'tal oscillator connect (75kHz)
2 FM O LOW:FM mode
3 CE I Chip enable, When data output/input for 4pin(input) and 6pin(output): H
4 DI I Input for receive the serial data from controller
5 CK I Sync signal input use
6 DO O Data output for Controller, Output port
7 ST/MONO O "Low": MW mode
8 AM/FM O Open state after the pow er on reset

9 LW I/O Input/output port
10 MW I/O Input/output port
11 SDIN I/O Data input/output
12 FM/AM IF I IF counter signal input
13 IF REQ O IF signal output
14 - Not use
15 AMOSC I AM Local OSC signal output
16 FMOSC I FM Local OSC signal input
17 VDD - Power supply(VDD=4.5-5.5V), When power ON:Reset circuit move
18 PD O PLL charge pump output(H: Local OSC frequency Height than Reference

frequency. L: Low Agreement: Height impedance)
19 LPFIN I Input for active low pass filter of PLL
20 LPFOUT O Output for active low pass filter of PLL
21 VSS - Connected to GND
22 XIN I X'tal oscillator connect (75KHz)

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29

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4.15 LC72723 (IC3) : RDS decoder

4.15.1 Terminal layou t

4.15.2 Block diagram

4.15.3

4.15.4 Pin function

Pin No. Symbol I/O Function

1 VREF O Reference voltage output (Vdda/2)
2 MPX I Base band (multiplex) signal input
3 VDDA - Analog system power supply (+5V)
4 VSSA - Analog system ground
5 FLOUT O Subcarrier output (filter output)
6 CIN I Subcarrier input (comparator input)
7 TEST I Test input
8 XOUT O Crystal element output (4.332MHz)

9 XIN I Crystal element input (or external referen c e signal input)
10 GND - Digital system ground
11 VDDD - Digital system power supply (+5V)
12 MODE I Readout mode setting (0:master, 1:slave)
13 RST I RDS ID and RAM reset (Active high logic)
14 RDDA O RDS data output
15 RDCL I/O RDS clock output (master mode)/RDS clock input (slave mode)

RDS-ID/READY

16

O RDS ID/ready output (Active low)

30

4.16 NJM4580D-D (IC101) : Dual operational amplifier

4.16.1 Terminal layout & Block diagram

4.17 RPM6938-SV4 (IC801, IC802, IC812) : Remote control receiver

4.17.1 Block diagram

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4.18 LC75342M (IC501) : E. volume

4.18.1 Terminal layout

4.18.3 Pin function

Pin No. Symbol Function Pin No. Symbol Function

1 DATA Serial data and clock input for IC

control

2 CE Chip enable 19 L3 Input signal connections
3 VSS Connect to GND 20 L4 Input signal connections
4 TEST Electric volume connection for test 21 LSELO Input selector output
5 ROUT Volume control and equalizer input 22 LIN Volume control and equalizer input
6 RBASS2 Connection for resistor and capacitor
7 RBASS1
8 RTRE Connection for capacitor that from

9 RIN Volume control and equalizer input 26 LOUT Volume control and equalizer input
10 RSELO Input selector output 27 NC Not use
11 R4 Input signal connections 28 VREF Connection to the 0.5X VDD voltage
12 R3 Input signal connections
13 R2 Input signal connections, not use
14 R1 Input signal connections 29 VDD Power supply
15 NC Not use 30 CLOCK Serial data and clock input for IC
16 NC Not use

that from the bass band filter

the treble band filter

4.18.2 Block diagram

17 L1 Inp ut signal connections
18 L2 Inp ut signal connections, not use

23 LTRE Connection for capacitor that from

the treble band filter

24 LBASS1 Connection for resistor and capacitor
25 LBASS2 that from the bass band filter

generator circuit used as the analog
signal ground

control

31

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4.19 XC62HR3502P (IC291) : Regulator

4.19.1 Terminal layou t

4.19.3 Pin function

Pin No. Symbol Function

1 VSS GND
2 Vin Power supply inpu t
3 ON/OFF ON/OFF control
4(NC) Not use
5 Vout Regulator output

4.19.2 Block diagram

32

< MEMO >

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VICTOR COMPANY OF JAPAN, LIMITED

AUDIO & COMUNICATION BUSINESS DIVISION
PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.21119)

200207