JVC VSDT-2000 Service manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

VS-DT2000

Area suffix

J ----------------------------- U.S.A.
C -------------------------- Canada

VS-DT2000

STANDBY/ON

123

PLAY MODE

4

6

5

REPEAT

9

8

7

FM MODE

10

+

10

TREBLEBASS

SET

CANCEL

MD/AUX

SLEEPDIMMERDISPLAYFM/AM

CLOCK

OPEN/

COLOR

/TIMER

CLOSE

VOLUME

RM-SVSDT

2000J REMOTE CONTROL

Contents

Safety precautions
Preventing static electricity
Important for laser products
Importance administering point
on the safety
Disassembly method

COMPACT COMPONENT SYSTEM

CA-VSDT2000RSP-VSDT2000 SP-VSDT2000 SP-PW2000

1-2
1-3
1-4

1-5
1-7

Flow of functional operation
until TOC read
Error code
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs

1-20
1-21
1-22
1-22
1-23 35

COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.

No.21082

May. 2002

VS-DT2000

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 void the manufacturer`s 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 special 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 re-assembling.

5. Leakage currnet check (Electrical shock hazard testing)
After re-assembling 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.
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 meausre 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.).

0.15 F AC TYPE

1500 10W

Good earth ground

AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)

Place this
probe on
each exposed
metal part.

!

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 local voltage.

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.

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 identified by the " "
mark nearby are critical for safety.
(This regulation does not correspond to J and C version.)

1-2

VS-DT2000

Preventing static electricity

1. Grounding to prevent damage by 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.

2. About the earth processing for the destruction prevention 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.

2-1 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.

2-2 Ground yourself

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

(caption)
Anti-static wrist strap

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

1.
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

2.
source can easily destroy the laser diode.

4. 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.

Remove solder of the short land on the flexible wire 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 wire 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.

5. Attention when traverse unit is decomposed

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

Short land

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 CD
pickup may be destroyed by static electricity.)
In the assembly, be sure to remove solder from the short land after
connecting the flexible wire.

Flexible wire

CN601

CD servo board

1-3

VS-DT2000

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
laserradiation and is equipped with safety switches
whichprevent 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 öppnad

och spårren är urkopplad. Betrakta ej strålen.

VARO : Avattaessa ja suojalukitus ohitettaessa olet

alttiina näkymättömälle lasersäteilylle.Älä katso
säteeseen.

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 an adjustment or operation
check.

ADVARSEL : Usynlig laserstråling ved åbning , når

sikkerhedsafbrydere er ude af funktion. Undgå
udsættelse for stråling.

ADVARSEL : Usynlig laserstråling ved åpning,når

sikkerhetsbryteren er avslott. unngå utsettelse
for stråling.

1-4

Importance administering point on the safety

<Main body section>

F1901

VS-DT2000

Main board

F1902

F1903

Power amplifier board

Caution: For continued protection against risk of
fire, replace only with same type 1A/125V for F1901,
8A/125V for F1902, 3.15A/125V for F1903.
This symbolspecifies type of fast operating fuse.

Precaution: Pour eviter risques de feux, remplacez
le fusible de surete de F1901 comme le meme type
que 1A/125V, F1902 comme le meme type que
8A/125, et 3.15A/125V pour F1903.
Ce sont des fusibles suretes qui functionnes rapide.

1-5

VS-DT2000

<Speaker section>

F2901

Switch board

F2911

F2921

Power supply board

Caution: For continued protection against risk of
fire, replace only with same type 2A/125V for F2901,

1.6A/125V for F2911, 1.6A/125V for F2921.
This symbolspecifies type of fast operating fuse.

Precaution: Pour eviter risques de feux, remplacez
le fusible de surete de F2901 comme le meme type
que 2A/125V, F2911 comme le meme type que

1.6A/125, et 1.6A/125V pour F2921.
Ce sont des fusibles suretes qui functionnes rapide.

1-6

VS-DT2000

Disassembly method

<Main body section>

Removing the top lens (See Fig. 1.)

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

Removing the bottom panel

(See Figs. 2 and 3.)

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 upward direction.

A

Bottom panel

Top lens

A

Fig.1

Top panel

B

Fig.2

Removing the top panel (See Fig. 4.)

Remove the top lens.
Remove the bottom panel.

1.2.Slide the top panel toward the rear (direction of the
arrow), disengage it from the engagement sections
a of the front panel assembly and engagement
sections b of the bottom chassis.

C

Bottom panel

Fig.3

Top panel

bb

Remove the top panel in an upward direction.

Front panel assembly

Fig.4

a

1-7

VS-DT2000

Removing the CD mechanism
assembly (See Fig. 5.)

Remove the top lens.
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 five screws D, screw E and screw F
attaching the CD mechanism assembly.

3.

Disconnect the wire from connector CN801 on the
LED board.

4.

Remove the CD mechanism assembly in an
upward direction.

Removing the front panel assembly

(See Figs. 6 and 7.)

CN801

LED board

F

Main board

D

D

Claw c

Push button

Fig.5

CD mechanism
assembly

D

E

Bottom chassis

Remove the top lens.
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 G 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.

Wire holder

CN183

CN171

Claws d

Hole on
the bottom chassis

CN182

Fig.6

Tie band

CN106

Front panel assembly

Front panel assembly

Claws d

[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.

1-8

G

Fig.7

Removing the tuner board

(See Figs. 8 and 9.)

Remove the top lens.
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 H attaching the FM/AM antenna
terminals on the tuner board.

3.

Take out the tuner board from the bottom chassis.

Speaker board

CN102

Tuner board

Bottom chassis

Notch

Tie band

CN111

Fig.8

CN101

VS-DT2000

CD mechanism
assembly wire

Tie band

Main board

Removing the speaker board

(See Figs. 8 and 9.)

Remove the top lens.
Remove the bottom panel.
Remove the top panel.
Remove the CD mechanism assembly.

1.

Remove the tie bands 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 J 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. 8.)

Rear panel

Speaker terminal Digital out terminal

JH

Fig.9

FM antenna
terminal

AM antenna
terminal

H

1-9

VS-DT2000

Removing the main board

(See Figs. 10 and 11.)

Remove the top lens.
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 K, which retains the main
board, together with the wire holder.

5.

Remove the two screws L, screw L' and screw M
attaching the main board.

6.

Remove the two screws N attaching the main
board and then remove the rear panel.

L

M

Wire holder

Main board

CN191

CN194

CN181

Rear panel

CN192

Fig.10

Power transformer

Wire clamp

L

Power amplifier
board

L'K

Bottom chassis

Earth wire

N

7.

Take out the main board from the bottom chassis.

[Reference] Attaching the main board
When attaching the screw L', attach the earth
wire of the main board at the same time.
When attaching the screw K, 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.

Removing the power amplifier board

(See Fig. 12.)

Remove the top lens.
Remove the bottom panel.
Remove the top panel.
Remove the CD mechanism assembly.

1.2.Disconnect the wires from connectors CN192 and
CN193 on the power amplifier board.

Remove the two screws P attaching the fan motor.

[Reference]
It is not necessary to remove the wire from
the fan motor.

3.4.Remove the two screws Q attaching the power
amplifier board.

Main board

Power amplifier
board

CN192

CN193

Fig.11

Fig.12

Hook e

Hook e

Q

Q

Fan motor

Heat sink

P
P

Lift the power amplifier board, disengage the two
hooks e from the heat sink of the main board and
take out the power amplifier board.

1-10

Removing the power transformer

(See Fig. 13.)

Remove the top lens.
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 R and two washers
attaching the power transformer.

[Reference]
After connecting the wires, bundling them
using a wire clamp and tie band.

Main board

Treat the wire from the fan motor.

Tie band

CN194

CN181

Wire clamp

CN191

CN192

Power amplifier
board

Fig.13

VS-DT2000

Power transformer

Washers

R

Fan motor

Removing the fan motor

(See Figs. 13 and 14.)

Remove the top lens.
Remove the bottom panel.
Remove the top panel.
Remove the CD mechanism assembly.
Remove the front panel assembly.

1.2.Disconnect the wire from connector CN181 on the
main board.

From the right side of the main body, remove the
two screws P attaching the fan motor.

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

Fan motor

P

Bottom chassis

Fig.14

1-11

VS-DT2000

<Front panel assembly section>

Remove the top lens.
Remove the bottom panel.
Remove the top panel.
Remove the CD mechanism assembly.
Remove the front panel assembly.

Removing the switch board

(See Fig. 15.)

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

Removing the open/close board

(See Figs. 15 and 16.)

1.2.From the back side of the front panel assembly,
remove the two screws T attaching the door motor
assembly.

Remove the screw W attaching the open/close
board of the door motor assembly.

Removing the door motor (See Fig. 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.

Door motor assembly

T

Clutch assembly

Stop washer

Gear 2

Front panel assembly
(Back side)

Front panel assembly
(Back side)

Fig.15

Door motor

Washer

Fig.16

Rod gear assembly

S

Switch board

X

W

Open/Close
board

Door motor assembly

f

3.

Remove the two screws X attaching the door
motor.

Removing the front board

(See Figs. 17 to 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
direction of the arrow.

3.

While slightly widening sections g toward the front,
take out the moving panel assembly in the direction
of the arrow.

4.

Remove the two screws Y 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 assembly and remove the moving
base.

6.

Remove the screw Z and screw Z' attaching the
front board.

7.

Disengage the claws 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.19.)
When attaching the screw Z', attach the wire
at the same time.

Y

Z

Fig.17

Fig.18

Fig.19

Fig.20

g

Moving panel assembly

Moving base

Hole

i

Front board

Z'

Moving panel

Front base

Front base

hh

Card wire

Wire

1-12

VS-DT2000

<CD mechanism assembly section>

Removing the LED board (See Fig. 1.)

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.

Removing the CD mechanism

assembly (See Fig. 2.)

From the back side of the CD mechanism

1.
assembly, remove the three screws A attaching the
CD mechanism assembly on the top chassis.

Raise the protector in the direction of arrow and

2.
then remove the CD mechanism assembly.

Removing the CD servo board

(See Fig. 3.)

Claw a

A

LED board

Top chassis

Fig.1

CD mechanism assembly

[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, attach 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 disengage it from the projection c and then
from the engagement section d.

Protector

Flexible wire

Projection

Fig.2

Short land section b

CN612

CN601

CN611

c

Top chassis

Engagement section

CD servo board

B

A

d

[Caution] In the assembly, be sure to remove
solder from the short land section b
after connecting the flexible wire.

Fig.3

1-13

VS-DT2000

Removing the traverse mechanism

assembly (See Fig. 4.)

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
mechanism assembly.

3.

Disengage the claw e attaching the traverse
mechanism assembly and then take out the
traverse mechanism assembly.

Removing the pickup unit

(See Figs. 5 and 6.)

Remove the CD servo board.
Remove the traverse mechanism assembly.

Traverse mechanism
assembly

Claw e

Pickup unit

E

Fig.4

C

DD

Section f

CD servo board
bracket

1.

From the top side of the traverse mechanism
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.

E

Shaft

Traverse mechanism assembly

Fig.5

Shaft

Pickup unit

P.S. spring

G

F

Rack plate

Fig.6

1-14

VS-DT2000

Attaching the pickup unit

(See Figs. 7 and 8.)

[Reference]
Refer to the explanation of "Removing the
pickup unit" 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.

Section f

Groove g

Groove h

Fig.7

Section j

E

Removing the traverse mechanism
board (See Fig. 9.)

Remove the CD servo board.
Remove the traverse mechanism assembly.

1.

From the back side of the traverse mechanism
assembly, disconnect the spindle motor wires and
feed motor wires that are soldered on the traverse
mechanism board.

2.

Remove the two screws H attaching the traverse
mechanism board.

Removing the feed motor (See Fig. 9.)

Rack prate

Fig.8

Traverse mechanism assembly

H

Spindle motor

Black

J

Feed motor

Red

Traverse
mechanism board

Red

H

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.9

1-15

VS-DT2000

Removing the CD switch board

(See Fig.10.)

Remove the CD mechanism assembly.

1.

From the top side of the CD mechanism assembly,
remove the screw K attaching the CD switch board.

2.

Lift the CD switch board slightly and then remove
the wire from connector CN101 on the CD switch
board.

Removing the loading motor assembly

(See Figs.3, 10 to 12.)

CD mechanism assembly Clamper base assembly

K

Remove the CD mechanism assembly.

1.

From the back side of the CD mechanism
assembly, disconnect the card wire from connector
CN612 on the CD servo board. (See Fig.3.)

2.

From the top side of the CD mechanism assembly,
remove 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 assembly 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 assembly and take out the loading motor
assembly.

CN101

M

CD switch board

L

Fig.10

Fig.11

CN103

L

M

Roller holder
assembly

CN104

Loading motor assembly

1-16

N

N

Belt

Fig.12

VS-DT2000

<Speaker section>

Removing the amplifier assembly

(See Figs. 1 and 2.)

1.2.From the rear side of the speaker main body,
remove the eleven screws A attaching the amplifier
assembly.

Remove the connectors from the speaker.

A

AA

Amplifier assembly

A

Fig.1

Removing the back panel (See Fig. 3.)

Remove the amplifier assembly.

1.2.Pull out the knob and remove it.

Remove the three screws B attaching the back
panel.

Connectors

Amplifier assembly

Fig.2

Knob

B

Back panel

Fig.3

1-17

VS-DT2000

Removing the pre-amplifier board

(See Fig. 4.)

Remove the amplifier assembly.
Remove the back panel.

1.

Remove the two screws C attaching the pre­amplifier board from the volume bracket.

2.

Disengage the tie band bundling the wires from the
power transformer.

3.

Disconnect the connector CN211 on the pre­amplifier board from the power supply board.

4.

Disconnect the wire from connector CN251 on the
pre-amplifier board.

Removing the power supply board

(See Fig. 5.)

Remove the amplifier assembly.
Remove the back panel.
Remove the pre-amplifier board.

1.

Remove the five screws D attaching the power
supply board.

2.

Remove the screw E attaching the power supply
board and wire holder.

Power supply board

D

CN281

E

Switch board

Volume bracket

C

CN211

Pre-amplifier
board

CN251

Tie band

Fig.4

D

Power supply
board

CN291

D

3.

Disconnect the wires from connectors CN281 and
CN291 on the power supply board.

Removing the switch board

(See Fig. 6.)

Remove the amplifier assembly.
Remove the back panel.
Remove the pre-amplifier board.
Remove the power supply board.

1.

Remove the three screws F attaching the AC
bracket.

2.

Disengage the tie band bundling the wires from the
power transformer.

3.

Disconnect the wire from connector CN299 on the
switch board.

Wire holder

Tie band

CN299

Switch board

F

F

Power transformer

Fig.5

Power
transformer

AC bracket

Fig.6

1-18

Removing the power transformer

(See Figs. 7 and 8.)

Remove the amplifier assembly.
Remove the back panel.
Remove the pre-amplifier board.
Remove the power supply board.

1.2.Remove the two screws G attaching the cord cover.

Remove the four screws H and four washers
attaching the power transformer.

VS-DT2000

Cord cover

G

Fig.7

Removing the LED board

(See Figs. 9 and 10.)

1.

From the top of the speaker main body, insert the
tip of a flat-blade screwdriver or a similar tool into
the gap between the speaker main body and the
ornament window (sections a) in order to lift the
ornament window little by little so that it is
separated from the speaker main body. Then,
remove the ornament window in the direction of the
arrow.

2.

From the back side of the ornament window,
remove the two screws J attaching the LED board.

3.

Disconnect the wire from connector CN061 on the
LED board.

Washers

Fig.8

Section a Section a

Ornament window

Fig.9

Ornament window (Back side)

H

Washer

Power
transformer

Washer

H

J

LED board

Fig.10

CN061

1-19

VS-DT2000

Flow of functional operation until TOC read

Power ON Play Key

Slider turns REST
SW ON.

Automatic tuning
of TE offset

Laser ON

Detection of disc

Automatic tuning of
Focus offset

Check Point

Confirm that the voltage at the pin3
of CN611 is "H"\"L"\"H".

Tracking error waveform at TOC reading

Pin 20 of
IC601(TEOUT)

Approx

1.8V

VREF

Disc states
to rotate

Approx.3sec

Tracking
servo
off states

Automatic measurement
of TE amplitude and
automatic tuning of
TE balance

Tracking
servo
on states

Disc to be
braked to stop

TOC reading
finishes

500mv/div
2ms/div

Fig.1

Automatic measurement of
Focus S-curve amplitude

Disc is rotated

Focus servo ON

(Tracking servo ON)

Automatic measurement of
Tracking error amplitude

Automatic tuning of
Tracking error balance

Automatic tuning of
Focus error balance

Confirm that the Focus error
S-curve signal at the pin 28 of
IC651 is approx.2Vp-p

Confirm that the signal from
pin 24 IC651(R808) is 0V as a
accelerated pulse during
approx.400ms.

Confirm the waveform of
the Tracking error signal
at the pin 20 of IC601 (R604)
(See Fig.1.)

1-20

Automatic tuning of
Focus error gain

Automatic tuning of
Tracking error gain

TOC reading

Play a disc

Confirm the eys-pattern
at the lead of TP1.

Error code

Error code indication

Error code is indicated on the FL display.

This unit is placed horizontally.

SOURCE PRESET VOL

COMPACT COMPONENT SYSTEM

This unit is placed vertically.

VS-DT2000

SOURCE PRESET VOL

SOURCE PRESET VOL

Error code contents

FL indication

SOURCE PRESET VOL

COMPACT COMPONENT SYSTEM

Phenomenon

CD INIT ERR.
CD EJECT ERR
CD MECHA ERR
CD LOAD ERR.

Mechanism initialize error
Eject error / DISC abnormal equipment
Chucking switch error
Load error

1-21

VS-DT2000

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.

Is the level of

RFOUT under

1.25V 0.22Vp-p?

YES

O.K

NO

Replace it.

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 "Removing the pickup unit" on the previous page)

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

Play a disc.

Check the eye-pattern at TP1.

Finish.

(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.

1-22

Description of major ICs

MN101C35DKB (IC811) : FL driver microcomputer

1. Terminal layout

100 76

1

75

VS-DT2000

25

26 50

2. Pin function

51

Pin No. Symbol I/O Function

1
2
3
4
5

6,7

8
9

10

11,12

13

14 23

24
25
26

27 30

31
32

33 38

39,40

41
42
43

44 46

47

48 60

61
62 64
65 99

100

NC
FLDATA
FLCLK
NC
FLCS
NC
B5V
OSC2
OSC1
GND
NC
GND
VREF
NC
FLRST
NCV70
REMCON_HO
NCV70
GND
NCV70
KEYLEDH
KEYLEDV
KEYDIMMER
NC
G1
G2 G14
G15

S1 S35

-VPP

-

Not connect

I/O

FL driver communication data input/output

I

FL driver communication clock input

-

Not connect

I

FL driver communication chip select input

-

Not connect

-

VDD(B5V)

O

8MHz main clock output

I

8MHz main clock input

-

Ground

-

Not connect

-

Ground

-

Reference voltage

-

Not connect

I

FL reset input

-

Not connect

O

Switching signal for receiver part of remote controller

-

Not connect

-

Ground

-

Not connect

-

Not use

-

Not use

-

Not use

-

Not connect

-

Not connect

O

Grid signal outputs

-

Not connect

-

Not connect

O

Segment signal outputs

-

VPP

BA15218F (IC102) : Dual operational amplifier

1. Terminal layout & Block diagram

OUT1

IN1-

IN1+

VEE

1

2

1

3

4

8

Vcc

7

OUT2

6

IN2-

2

5

IN2+

1-23

VS-DT2000

MN101C30AKJ1 (IC701) : System control microcomputer

1. Terminal layout

64 49

1

48

16

17 32

2. Pin function

33

Pin No. Symbol I/O Function

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

THERM
KEY1
KEY2
VERSION
GND
VREF+
VDD
OSC2
OSC1
VSS
XI
XO
GND
CDTX
CDRX
FLRST
FLDATA
FLCS
FLCLK
STBLEDH
RST
STBLEDV
FTU
TUDATA
TUST
TUCK
MPX
RDSCK
RDSI
REM
GND
SMUTE
AHB
VOLDI
VOLCE
VOLCL
LOMUTE
TREMCONT

H-V

I

Temperature detection, ON/OFF control of FAN_SW signal(pin 57)

I

Key switch input of the main body

I

Key switch input of the main body

I

Switching signal for destination

-

Ground

-

Reference voltage for A/D converter (Connect to VDD.)

-

Power supply for microcomputer

O

8MHz main clock output

I

8MHz main clock input

-

Ground for microcomputer

I

32.768kHz sub clock input

O

32.768kHz sub clock output

-

Ground

O

CD(FMU-F1) communication

I

CD(FMU-F1) communication

O

FL reset output

I/O

FL driver communication data input/output

O

FL driver communication chip select output

O

FL driver communication clock output

O

Standby LED for horizontal establishment (POWER_OFF/ON=H)

I

Microcomputer reset input

O

Standby LED for vertical establishment (POWER_OFF/ON=H)

O

Power supply for tuner

I/O

PLL input/output data (Connect to tuner.)

O

PLL strobe output (Connect to tuner.)

O

PLL clock output (Connect to tuner.)

I

Stereo detection (Connect to tuner.), STEREO=L

-

Not use

-

Not use

I

Remote controller input

-

Ground

O

Mute signal, MUTE=L

O

Bass boost, ON=L, POWER_OFF=L

O

Data output (Connect to VOLUME_IC.)

O

Enable output (Connect to VOLUME_IC.)

O

Clock output (Connect to VOLUME_IC.)

O

Line out mute signal, MUTE=L

I

Remote controller effective signal for horizontal establishment, L : effective state

-

Connect to ground

I

Detecting signal for horizontal or vertical establishment

1-24

VS-DT2000

Pin No. Symbol I/O

41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
50
60
61
62
63
64

CDRSI

BLCTL
PSAVE
FCD
POUT
TOPLED1
TOPLED2
STBDIM
DOOR1
DOOR2
+BCTL
BUP
FANSW
MT0
MT1
MTS
VREF­LOCK
SAFETYCD
SAFETY

-

-

-

O

-

-

O

­O
O
O

O

O
O
O
O

-

Function
Connect to ground
Connect to ground
Connect to ground
CD reset output (Connect to FMU-F1.)
Connect to ground
Not connect
Power save mode ON/OFF signal, SAVE=H
CD power supply ON/OFF, not use
Main power supply ON/OFF
LED color control (Software PWN output)
LED color control (Software PWN output)

I

Dimmer control for STBYLED_H/V

I

Moving panel position detecting signal, CLOSE=L

I

Moving panel position detecting signal, OPEN=L
Unnecessary power supply cut-off signal for outage, Outage=H

I

Outage detecting signal (Backup mode)
Fan motor ON/OFF signal
Panel open (Motor driver)
Panel close (Motor driver)
Panel action speed (Not use)
Reference voltage for A/D converter (Connect to VSS.)

I

Detection signal for panel action load

I

Detecting signal for CD abnormal voltage

I

Detecting signal for abnormal voltage

KIA78S06P (IC702) : Regulator

1. Terminal layout 3. Block diagram

123

2. Pin function

Pin No.

1
2
3

Output
Common
Input

Function

Z1

Q14

Q16

Q1

R9

R10

R11

Q2

Q7

Q4

R1

Q3

Q6

R2

Q8

R3

UPC78L05J (IC191, IC261) : Three terminal voltage regulator

1. Terminal layout

1 : OUTPUT
2 : GND
3 : INPUT

123

2. Circuit diagram

R13

Q10

R14

R15

D1

Q15

R16

Q11

R1

Q1

R17

Q5

Q4

Q8

R4

R2

Q6

R5

C1

Q2

R3

C1

Q9

Q3

R9

R6

Q13

Q5

R4

Q9

Q7

Q10

D2

R19

R18

R11

Q12

Q11

Q12

R12

R7

R8

Q14

R10

Q13

R7

R5

R6

INPUT

OUTPUT

GND

3

INPUT

2

OUTPUT

1

COMMON

1-25

VS-DT2000

MN662790RSC (IC651) : Digital servo & Digital signal prossesor

1. Terminal layout

20 1

21

80

40

41 60

2. Pin function

61

Pin No. Symbol I/O Function

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

BCLK
LRCK
SRDATA
DVDD1
DVSS1
TX
MCLK
MDATA
MLD
SENSE
FLOCK
TLOCK
BLKCK
SQCK
SUBQ
/DMUTE
STAT
DSP_RST
SMCK
CSEL
TEST2
TVD
PC
ECM
ECS
VDETMON
TRD
FOD
VREF
FBAL
TBAL
FE
TE
RF ENV
TEST3
OFT
TRCRS
/RFDET
BDO
LDON

O

Bit clock output for SRDATA

O

LR signal separation output

O

Serial data output

-

Power supply for digital circuit

-

GND for digital circuit

O

Digital audio ineterface output

I

Micro computer command clock signal input

I

Micro computer command data input

I

Micro computer command load signal input (L:Load)

-

Not use

-

Not use

-

Not use

O

Sub code block signal output

I

External clock input for sub code Q register input

O

Sub code Qdata output

I

Muting input (H:Mute)

O

Status signal input

I

Reset signal input (L:Reset)

-

Not use

I

Connect to DVDD1 (H fix)

-

Not use

O

Traverse drive output

-

Not use

O

Spindle motor drive signal (Enforced mode output)

O

Spindle motor drive signal (Servo error signal output)

-

Not use

O

Tracking drive output

O

Focus drive output

I

Reference voltage for D/A output block

O

Focus balance adjust signal output

O

Tracking balance adjust signal output

I

Focus error signal input (Analog input)

I

Tracking error signal input (Analog input)

I

RF envelope signal input (analog input)

I

Connect to GND

I

Off track signal input (H:Off track)

I

Track crosssignal input

I

RF detect signal input (L:Detect)

I

Drop out signal input (H:Drop out)

-

Not use

1-26

Pin No. Symbol I/O Function

41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80

PLLF2
DSLBDA
WVEL
ARF
IREF
DRF
DSLF
PLLF
VCOF
AVDD2
AVSS2
EFM
DSLB
VCOF2
SUBC
SBCK
VSS
X1
X2
VDD
BYTCK
LD
GAIN
IPFLAG
FLAG
CLVS
CRC
DEMPH
RESY
IOSEL
/TEST
AVDD1
OUTL
AVSS1
OUTR
DQSY
Vcc5V
PSEL
MSEL
SSEL

-

Not use

-

Not use

-

Not use

I

RF signal input

I

Referrence current input

I

Bias pin for DSL

I/O

Loop filter pin for DSL

I/O

Loop filter pin for PLL

I/O

Loop filter pin for VCO

-

Power supply for analog circuit

-

GND for analog circuit

-

Not use

O

DSL balance output

I/O

Loop filter pin for Digtal servo VCO

-

Not use

-

Not use

-

GND for crystal oscillation circuit

I

Input for crystal oscillation circuit (f=16.9344MHz)

O

Output for crystal oscillation circuit (f=16.9344MHz)

-

Power supply for crystal oscillation circuit

-

Not use

O

Laser ON signal output (H : ON)

O

Gain control output (H : CD-RW)

-

Not use

O

Flag signal output

-

Not use

-

Not use

-

Not use

-

Not use

I

Mode select pin , Connect to DVDD1 (H fix)

I

Test pin ,Connect to DVDD1 (H fix)

-

Power supply for analog circuit

O

L-channel audio output

-

GND for analog circuit

O

R-channel audio output

-

Not use

-

Connect to power supply

I

IOSEL=H , Test pin , Connect to GND ( L fix)

I

IOSEL=H , SMCK output , Frequency select pin

I

IOSEL=H , SMCK output , SUBQ output mode select pin

VS-DT2000

LB1641 (IC108) : DC motor driver

1. Terminal layout

1

2 3 4 5 6 7 8 9 10

P1

VZ

IN1

GND

OUT1

IN2

VCC1

VCC2P2OUT2

2. Pin function

Input Output

IN1 IN2 OUT1 OUT2

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

Mode

Brake0 0 0 0
Clockwise
Counterclockwise
Brake

1-27

VS-DT2000

UPD780024AGKB62 (IC251) : Unit microcomputer

1. Terminal layout

64 49

1

48

16

17 32

2. Pin function

33

Pin No. Symbol I/O Function

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

P50/A8
P59/A9

MCS

MRDY

CDINDEX

CDEMP
CDTNO

CDCOPY

VSSO

VDDO

P30
P31
P32

/DRMUTE

SUBQ

P35/SO31

SQCK

KCMND

M STAT

KCLK

RXDO

TXDO

P25/SCKO

VDD1
AVSS

VDTLV

P16/ANI6

PCHK
P14/ANI4
P13/ANI3
P12/ANI2

/REST

SW1

AVREF

AVDD

/RESET

XT2
XT1

IC

X2

-

Connect to ground

-

Not use

O

Synchronous/asynchronous output

I

Ready signal input

-

Not use

-

Not use

-

Not use

-

Not use

-

Ground terminal

-

Power supply terminal

-

Not use

-

Not use

-

Not use

O

Mute signal output

I

Sub code Q data input

-

Not use

O

Clock output for sub code Q register

I

Command signal input

O

CD control status output

I

CD control command clock input

I

Command input

O

Status output

-

Connect to ground

-

Power supply terminal

-

Ground terminal

I

Sensitivity adjustment for vibrating detection

-

Not use

I

Voltage monitor (for safety)

-

Connect to ground

-

Connect to ground

-

Connect to ground

I

Rest switch input

I

Mechanism switch (Photo sensor)

-

Reference voltage for analog circuit

-

Power supply terminal for analog circuit

I

CD control reset input

-

Not use

-

Connect to power supply

-

Connect to ground

-

Connect to external crystal oscillator

1-28

Pin No. Symbol I/O Function

41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64

X1
VSS1
FLAG
BLKCK
/RFDET
EQx2
EQx4
P71/TIO1
FWD
REW
IREFx4
P75/BUZ
/RESET
S TAT
/DMUTE
/P.ON
MLD
M DATA
MCLK
P43/AD3
P44/AD4
P45/AD5
/SW2
/SW3

-

Connect to external crystal oscillator

-

Ground terminal

I

Flag signal input

I

Sub code block clock signal input

I

RF signal amplitude detecting signal input

I

Equalizer select signal input

I

Equalizer select signal input

-

Not use

O

Loading (EJECT) output

O

Loading (LOAD) output

O

Switching signal for IREF current (4x mode : L)

-

Not use

O

Reset signal output (L: reset)

I

Status signal input

O

Muting output

O

Power ON/OFF switching signal output

O

Microcomputer command load signal output

O

Microcomputer command data output

O

Microcomputer command clock signal output

-

Not use

-

Not use

-

Not use

I

Mechanism switch (Loading switch)

I

Mechanism switch (Chucking completion)

LA4905 (IC301) : 2ch BTL power IC

1. Terminal layput 2. Block diagram

CVL

C

SWB VL VL

8

9 15 14 12 13 16 7 5 6 18 19 17 22

SW

123

VH

11

drive

SW

GND

Amplifier
output
stage

+OUT1 +OUT2 NC-OUT1 -OUT 2PG1 PG2

AB D

VS-DT2000

C

D

H.L.S. :

C
B
A

Ripple

filter

Higher
Level signal
selector

Nonlinear/output stage

Input
amplifier

CH 1

BEEP
amplifier

Power supply/ground

shorting protection circuit

Overvoltage/thermal

VH

H.L.S.

Switching regulator
block

10

Standby

SW

ST-BY RF PREGND IN 1 IN 2 ON-TIMEBEEP

NJM4580D-D (IC101,IC211,IC212,IC213) : Dual operational amplifier

1. Terminal layout & Block diagram

8 7 6 5

B

A

1 2 3 4

1. A OUTPUT

2. A -INPUT

3. A +INPUT

-

4. V

5. B +INPUT

6. B -INPUT

7. B OUTPUT
+

8. V

protection circuit

CH 2

Input
amplifier

Nonlinear amplifier/output

stage

Pop noise

prevention

circuit

ON MUTE

muting circuit

2314322021

1-29

VS-DT2000

AN22000A (IC601) : RF & Servo amplifier

1. Terminal layout 2. Block diagram

3TOUT

CEA

9 10 15 22 23 21 20 19 18 2 1

14

OFTR 3TENV

13

12

BDO

11

8

AGC

7

6

5

4

NRFDET

RF_EQ

10
11
12
13
14
15
16

1
2
3
4
5
6
7
8
9

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

OFTR

COFTR

BDO

CBDO

ARF

C.AGC

RF IN

RF OUT

RFN

FEN

FEOUT/RFDET

SUBT SUBT

BCA

GCA

BCA

GCA

TEN

BCA

GCA

AMPAMPAMP

VDET

TEBPFTEOUT

VDET

BCA

GCA

AMP

PDLD

3

VCC

16

GND

FBAL

25

26

TBAL

GCTRL

24

3. Pin function

A C B D PDE PDF VREF

Pin No. Symbol Function

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

PD
LD
VCC
RFN
RF OUT
RF IN
C.AGC
ARF
CEA
3TOUT
CBDO
BDO
COFTR
OFTR
/RFDET
GND
VREF
VDET
TEBPF
TEOUT
TEN
FEN
FEOUT
GCTRL
FBAL
TBAL
PDE
PDF
D
B
C
A

APC Amp. Input terminal
APC Amp.Output terminal
Power supply terminal
RF addition Amp.Reversing input terminal
RF addition Amp.Output terminal
AGC input terminal
Terminal of connection of capacity of AGC loop filter.
AGC output terminal
Capacity connection terminal for HPF-Amp.
3TENV output terminal
Capacity connection terminal for RF shade side envelope detection
BDO output terminal
Capacity connection terminal for RF discernment side envelope detection
OFTR output terminal
RFDET output terminal (Negative logic)
Earth terminal
VREF output terminal (Not use)
VDET output terminal (Not use)
VDET input terminal
TE Amp. output terminal
TE Amp. reversing input terminal
FE Amp. reversing input terminal
FE Amp. output terminal
Terminal GCTL & APC
FBAL control terminal
TBAL control terminal
Tracking signal input terminal 1
Tracking signal input terminal 2
Focus signal input terminal 4
Focus signal input terminal 2
Focus signal input terminal 3
Focus signal input terminal 1

2729303132

28

17

1-30

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

1. Terminal layout & Block diagram

VS-DT2000

30

ALC

BUFF

FM

S-METER

FM IF

1

29

AM

OSC

S-CLRVE

PM

DET

2

SD

COMP

27

28

REG

AM

MIXFMRF.AMP

AM IF DET

AM/FM

IF-BUFF

4

3

26

AGC

AM

S-METER

GND

25

24

TUNING

DRIVE

5

STEREO

DRIVE

6

7

22

23

VCC

89

P-DET

384KHz

21

DECODER

ANIT-BIRDIE

VCO

10

2. Pin function
Pin No. Symbol I/O Function

This is an input terminal of FM IF signal.

1
2
3
4
5
6
7
8

9
10
11
12
13

14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

FM IN
AM MIX
FM IF
AM IF
GND
TUNED
STEREO
VCC
FM DET
AM SD
FM VSM
AM VSM
MUTE/IFOUT

FM/AM
MONO/ST
LOUT
ROUT
LIN
RIN
RO
LO
MPX IN
FM OUT
AM DET
AM AGC
AFC
AM RF
REG
AM OSC
OSC BUFFER

I

This is an out put terminal for AM mixer.

O

Bypass of FM IF

I

Input of AM IF Signal.

I

This is the device ground terminal.

­When the set is tunning,this terminal becomes "L".

O

Stereo indicator output. Stereo "L", Mono: "H"

O

This is the power supply terminal.

­FM detect transformer.

­This is a terminal of AM ceramic filter.

­Adjust FM SD sensitivity.

O

Adjust AM SD sensitivity.

O

When the signal of IF REQ of IC121(LC72131) appear, the signal of FM/AM IF output.

I/O

Muting control input.
Change over the FM/AM input. "H" :FM, "L" : AM

I

Stereo : "H", Mono: "L"

O

Left channel signal output.

O

Right channel signal output.

O

Input terminal of the Left channel post AMP.

I

Input terminal of the Right channel post AMP.

I

Mpx Right channel signal output.

O

Mpx Left channel signal output.

O

Mpx input terminal

I

FM detection output.

O

AM detection output.

O

This is an AGC voltage input terminal for AM.

I

This is an output terminal of voltage for FM-AFC.

­AM RF signal input.

I

Register value between pin 26 and pin28 besides the frequency width of the input signal.

O

This is a terminal of AM Local oscillation circuit.

­AM Local oscillation Signal output.

O

20

STEREO

5N
SW

FF

38k

11

18

19

MUTE

FF
19k

/

2

12 13

FF
19k

17 16

/LS

14

PILOT

DET

15

1-31

VS-DT2000

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

1. Terminal layout 2. Block diagram

1
2
3
4
5
6
7

FR

8

9
10
11
12
13
14

28
27
26
25
24
23
22

FR

21
20
19
18
17
16
15

REV

FWD

28 27 26 25 24 23 22 FR 21 20 19 18 17 16 15

Input

MUTE is as follows:
High: Output ON
Low : Output OFF

Thermal
shutdown

Output
control

CH5 CH4

CH5

POWER

1234567 FR 8 9 1011121314

VO5-

VCC2

3. Pin function
Pin No. Symbol Function

1
2
3
4
5
6
7
8
9

10
11
12
13
14

VCC2
VO5­VO5+
VO4+
VO4­VO3+
VO3­VO2+
VO2­VO1+
VO1­VCC1
VIN1
VIN1G

Power supply for CH3/CH4/CH5
Loading output (-)
Loading output (+)
Tracking output (+)
Tracking output (-)
Focus output (+)
Focus output (-)
Spindle output (+)
Spindle output (-)
Traverse output (+)
Traverse output (-)
Power supply for CH1/CH2
Not use
Traverse drive input

S-GND

MUTE

MUTE

Level

shift

VO5+

VO4+

VIN4

VIN4G

22k 11k

VO4-

Signal

system

power

Level

shift

CH3

VO3+

VCCS

VO3-

VREF-IN

REG-OUT

5VREG
(External PNP_Tr)

Level

shift

CH2

VO2-

VO2+

Pin No. Symbol Function

15
16
17
18
19
20
21
22
23
24
25
26
27
28

VIN2
VIN2G
VIN3
VIN3G
REG-IN
REG-OUT
VREF-IN
VCCS
VIN4G
VIN4
MUTE
S-GND
FWD
REW

Not use
Spindle drive input
Not use
Focus drive input
Connect to power supply
Not use
Reference voltage input terminal
Signal system power
Tracking drive input
Not use
Mute for CH1/CH2/CH3/CH4
Signal system ground
Loading input (EJECT)
Loading input (LOAD)

REG-IN

VIN3G

22k

Level

shift

CH1

VO1-

VO1+

VIN3

11k

22k

11k

CH1- 4

POWER

VCC1

22k

VIN2G

VIN2

11k

VIN1

VIN1G

GP1FA550TZ (J3601) : Fiber optic transmitter/Receiver

1. Terminal layout 2. Block diagram

LED

Drive

IC

VIN
VCC
GND

1-32

LC72136N (IC2) : PLL frequency synthesizer

1. Terminal layout

2. Block diagram

VS-DT2000

FM

CE

DI

CK

DO

LW

MW

SDIN

1
2
3
4
5
6
7
8
9
10
11

22
21
20
19
18
17
16
15
14
13
12

XIN
VSS
LPFOUT
LPFIN
PD
VDD
FMOSC
AMOSC

IF REQ
FM/AMIF

16

17

22

15

21

1

1/2

3

4
5
6

C2B

I/F

Power

on

Reset

Reference

Swallow Counter

1/16,1/17 4bit

Programmable

Data Shift Register & Latch

721113

XOUT

ST/MONO

AM/FM

3. Pin function
Pin No. Symbol I/O Function

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18

XOUT
FM
CE
DI
CK
DO
ST/MONO
AM/FM
LW
MW
SDIN
FM/AM IF
IF REQ

AMOSC
FMOSC
VDD
PD

I

X'tal oscillator connect (75kHz)

O

LOW:FM mode

I

Chip enable, When data output/input for 4pin(input) and 6pin(output): H

I

Input for receive the serial data from controller

I

Sync signal input use

O

Data output for Controller, Output port

O

"Low": MW mode

O

Open state after the power on reset

I/O

Input/output port

I/O

Input/output port

I/O

Data input/output

I

IF counter signal input

O

IF signal output

-

Not use

I

AM Local OSC signal output

I

FM Local OSC signal input

-

Power supply(VDD=4.5-5.5V), When power ON:Reset circuit move

O

PLL charge pump output(H: Local OSC frequency Height than Reference

frequency. L: Low Agreement: Height impedance)
19
20
21
22

LPFIN
LPFOUT
VSS
XIN

I

Input for active low pass filter of PLL

O

Output for active low pass filter of PLL

-

Connected to GND

I

X'tal oscillator connect (75KHz)

Driver

12bit

Drivers

8

Phase

Detector

Charge Pump

Unlock

Detector

Universal

Counter

18
19
20

12

1-33

VS-DT2000

LC75342M (IC501) : E. volume

1. Terminal layout

1

DATA

2

CE

3

VSS

4

TEST

5

ROUT

6

RBASS2

7

RBASS1

8

RTRE

9

RIN

10

RSELO

11

R4

12

R3

13

R2

14

R1

15

NS

3. Pin function

Pin No.

Symbol Function

1

DATA

2
3
4
5
6
7
8

9
10
11
12
13
14
15
16

CE

VSS

TEST

ROUT
RBASS2
RBASS1

RTRE

RIN

RSELO

R4
R3
R2

R1
NC
NC

2. Block diagram

RSELO RIN RTRE RBASS1 RBASS2 ROUT

30
29
28
27
26
25
24
23
22
21
20
19
18
17
16

CLOCK
VDD
VREF
NC
LOUT
LBASS2
LBASS1
LTRE
LIN
LSELO
L4
L3
L2
L1
NC

NC
NC

11

R4

12

R3

13

R2

14

R1

15
16
17

L1

18

L2

19

L3

20

L4

10

Serial data and clock input for IC
control
Chip enable
Connect to GND
Electric volume connection for test
Volume control and equalizer input
Connection for resistor and capacitor
that from the bass band filter
Connection for capacitor that from
the treble band filter
Volume control and equalizer input
Input selector output
Input signal connections
Input signal connections
Input signal connections, not use
Input signal connections
Not use
Not use

9 8 7 6 5

CONTROL

CIRCUIT

LOGIC

CIRCUIT

CONTROL

CIRCUIT

Pin No.

17
18
19
20
21
22
23

Symbol Function

L1
L2
L3
L4

LSELO

LIN

LTRE

LVref

CCB

INTERFACE

RVref

LOUTLBASS2LBASS1LTRELINLSELO

Input signal connections
Input signal connections, not use
Input signal connections
Input signal connections
Input selector output
Volume control and equalizer input
Connection for capacitor that from

the treble band filter
24
25
26
27
28

LBASS1
LBASS2

LOUT

VREF

Connection for resistor and capacitor

that from the bass band filter

Volume control and equalizer input

NC

Not use

Connection to the 0.5X VDD voltage

generator circuit used as the analog

signal ground
29
30

VDD

CLOCK

Power supply

Serial data and clock input for IC

control

4

TEST

3

VSS

2

CE

DATA

1

CLOCK

30

VDD

29

VREF

28

NC

27

262524232221

XC62HR3502P (IC291) : Regulator

1. Terminal layout 3. Pin function2. Block diagram

Vout (NC)

1

23

Vss Vin

1-34

45

ON/OFF

ON/OFF

Vin

2

3

Current limit

Output
control

Voltage

reference

5

1

Vout

GND

Pin No.

1V
2Vin

Symbol Function

SS

GND

Power supply input

3 ON/OFF ON/OFF control
4

(NC)

Not use

5 Vout Regulator output

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

1. Block diagram

I/V
conversion

PD

magnetic shield

AMP

BPF

for
trimming circuit

AGC

Detector

Vcc

Comp

22k
ohm

VDD

OUT

GND

STK411-290E (IC221) : Power amplifier

1. Terminal layout

122

2. Block diagram

+VH

LIN

-LIN

NF1

17

18

19

20

TR1 TR2

C1

R2

TR3

TR5

R3

TR4

D6

R4

TR9

TR7

R8

R9

C5

TR11 TR23

TR12

TR10

TR24

TR22

TR6

C2

TR8

R5

R6

R7

D1

R19

C6

TR21

TR20

TR19

R18

R14

R16

R17

D7

R15

R16

TR14 TR13

C3

TR16

TR17

R13

R12

TR15

TR31

D31

D32

TR32

R31

Comparator

Comparator

D33

D35

D34

D36

VS-DT2000

1

+VH

3

NC

+VL comp

5

+VL

4

GND

2

SUB

-VL

7

-VL comp

6

R51

12 13

-VH

-VH

-VH

1511141016

LOUT

CH1-V

ROUT

CH2-V

TC74HCU04AP (IC251) : Inverter

1. Terminal layout & Block diagram 2. Truth table

11A
21Y
32A
42Y
53A
63Y
7

(TOP VIEW)

14
13
12
11
10
9
8GND

VCC
6A
6Y
5A
5Y
4A
4Y

INPUT INPUT

A

L

H

R32

22

21

9

-VL

RIN

-RIN

-VH

8

Y
H

L

1-35

VS-DT2000

VICTOR COMPANY OF JAPAN, LIMITED

AUDIO & COMMUNICATION BUSINESS DIVISION
PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,maebashi-city,371-8543,Japan

No.21082

200205