JVC VS-DT2000R User manual

VS-DT2000R
No.21078
May. 2002
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
SERVICE MANUAL
Contents
Safety precautions
Preventing static electricity
Important for laser products
Disassembly method
Flow of functional operation
until TOC read
1-2
1-4
1-5
1-6
1-19
1-20
Error code
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
VS-DT2000R
Area suffix
B ------------------------------- U.K.
E ----------- Continental Europe
EN ------------ Northern Europe
EV -------------- Eastern Europe
1-21
1-21
1-22 35
CA-VSDT2000RSP-VSDT2000 SP-VSDT2000
RM-SVSDT 2000R REMOTECONTROL
STANDBY/ON
PLAYMODE
REPEAT
FMMODE
TREBLEBASS
SET
CANCEL
SLEEPDIMMER
DISPLAY
DISPLAY
MODE
FM/AM
PTY
SEARCH PTY SELECT TA/NEWS /INFO
COLOR
CLOCK
/TIMER OPEN/ CLOSE
VOLUME
MD/AUX
123
6
9
10
10
7
45
8
+
COMPACTCOMPONENT SYSTEM
SP-PW2000
COMPACT COMPONENT SYSTEM

VS-DT2000R
1-2
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.).
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.
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE
!
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.)

VS-DT2000R
1-3
1. Service should be performed by qualified personnel only.
2. This equipment has been designed and manufactured to meet international safety standards.
3. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
4. Repairs must be made in accordance with the relevant safety standards.
5. It is essential that safety critical components are replaced by approved parts.
6. If mains voltage selector is provided, check setting for local voltage.
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.
2. Any unauthorised design alterations or additions will void the manufacturer's guarantee ; furthermore the
manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom.
3. Essential safety critical components are identified by ( ) on the Parts List and by shading on the
schematics, and must never be replaced by parts other than those listed in the manual. Please note
however that many electrical and mechanical parts in the product have special safety related
characteristics. These characteristics are often not evident from visual inspection. Parts other than
specified by the manufacturer may not have the same safety characteristics as the recommended
replacement parts shown in the Parts List of the Service Manual and 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.
!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.
(U.K only)

VS-DT2000R
1-4
Conductive material
(conductive sheet) or iron plate
(caption)
Anti-static wrist strap
Short land
CN601
CD servo board
Flexible wire
5. Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the CD pickup unit.
Apply solder to the short land before the flexible wire is disconnected
from the connector on the CD pickup unit.
(If the flexible wire is disconnected without applying solder, the 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.
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.
Preventing static electricity
1. Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players.
Be careful to use proper grounding in the area where repairs are being performed.
2. About the earth processing for the destruction prevention by static electricity
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.
2-1 Ground the workbench
2-2 Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
In order to maintain quality during transport and before installation, both sides of the laser diode on the
replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power
source can easily destroy the laser diode.
3. Handling the optical pickup
1.
2.
Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
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.
Handle the flexible wire carefully as it may break when subjected to strong force.
It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
4. Handling the traverse unit (optical pickup)
1.
2.
3.
4.

VS-DT2000R
1-5
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.
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.
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.
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.
REPRODUCTION AND POSITION OF LABELS
WARNING LABEL
CLASS 1
LASER PRODUCT
!
CAUTION
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
ADVARSEL: Usynlig laser-
stråling ved åbning, når
sikkerhedsafbrydere er ude
af funktion. Undgåudsæt-
telse for stråling. (d)
VARNING: Osynlig laser-
strålning när denna del är
öppnad och spärren är
urkopplad. Betrakta ej
strålen. (s)
CAUTION: Invisible laser
radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE
TO BEAM. (e)
VARO: Avattaessa ja
suojalukitus ohitettaessa
oleta lttiina näkymättö-
mälle lasersäteilylle.
Älä katso säteeseen. (f)
ADVARSEL: Usynlig laser- stråling ved åbning, når sikkerhedsafbrydere er ude af funktion. Undgåudsæt- telse for stråling. (d)
VARNING: Osynlig laser- strålning när denna del är öppnad och spärren är urkopplad. Betrakta ej strålen. (s)
CAUTION: Invisible laser radiation when open and
interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e)
VARO: Avattaessa ja suojalukitus ohitettaessa oleta lttiina näkymättö- mälle lasersäteilylle. Älä katso
säteeseen. (f)

VS-DT2000R
1-6
Fig.1
Fig.2
Fig.3
Fig.4
A
B
C
A
Top lens
Top panel
Bottom panel
Bottom panel
bb
Top panel
a
Front panel assembly
Disassembly method
<Main body section>
Removing the top lens (See Fig. 1.)
From the top side of the main body, remove the
four screws Aattaching the top lens.
Removing the bottom panel
(See Figs. 2 and 3.)
1.
2.
3.
From the rear side of the main body, remove the
three screws Battaching the bottom panel.
From the bottom side of the main body, remove the
two screws Cattaching the bottom panel.
Remove the bottom panel in an upward direction.
1.
2.
Slide the top panel toward the rear (direction of the
arrow), disengage it from the engagement sections
aof the front panel assembly and engagement
sections bof the bottom chassis.
Remove the top panel in an upward direction.
Removing the top panel (See Fig. 4.)
Remove the top lens.
Remove the bottom panel.

VS-DT2000R
1-7
Fig.5
Fig.6
Fig.7
CD mechanism
assembly
CN801
LED board
D
D
G
F
D
Claws d
CN171 CN182
Wire holder
Bottom chassis
Front panel assembly
Claws d
Main board
Tie band
CN183
CN106
Hole on
the bottom chassis Front panel assembly
Push button
Claw cE
[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.
Removing the CD mechanism
assembly (See Fig. 5.)
1.
2.
3.
4.
From the top side of the main body, disengage the
claw cof the CD mechanism assembly and then
remove the push button.
Remove the five screws D, screw Eand screw F
attaching the CD mechanism assembly.
Disconnect the wire from connector CN801 on the
LED board.
Remove the CD mechanism assembly in an
upward direction.
Removing the front panel assembly
(See Figs. 6 and 7.)
1.
2.
3.
4.
5.
6.
Remove the tie band bundling the wires of the front
panel assembly.
Disconnect the wires from connectors CN106 and
CN182 on the main board.
Disconnect the card wires from connectors CN171
and CN183 on the main board.
Remove the wire holder holding the card wire of
the front panel assembly.
From the front side of the main body, remove the
two screws Gattaching the front panel assembly.
Disengage the claws dof the front panel assembly
from the bottom chassis and then remove the front
panel assembly in the direction of arrow.
Remove the top lens.
Remove the bottom panel.
Remove the top panel.
Remove the top lens.
Remove the bottom panel.
Remove the top panel.
Remove the CD mechanism assembly.

VS-DT2000R
1-8
Fig.8
Fig.9
CN101
CN111
Tie band
Tie band
CN102
Speaker board
Tuner board
Rear panel
AM antenna
terminal
FM antenna
terminal
JH
H
Speaker terminal Digital out terminal
CD mechanism
assembly wire
Notch
Bottom chassis
Main board
Removing the tuner board
(See Figs. 8 and 9.)
1.
2.
3.
Disconnect the card wire from connector CN111 on
the main board.
From the rear side of the main body, remove the
two screws Hattaching the FM/AM antenna
terminals on the tuner board.
Take out the tuner board from the bottom chassis.
Removing the speaker board
(See Figs. 8 and 9.)
1.
2.
3.
4.
Remove the tie bands bundling the wires on the
speaker board.
Disconnect the wires from connectors CN101 and
CN102 on the speaker board.
From the rear side of the main body, remove the
three screws Jattaching the speaker/digital out
terminals on the speaker board.
Take out the speaker board from the bottom
chassis.
Remove the top lens.
Remove the bottom panel.
Remove the top panel.
Remove the CD mechanism assembly.
Remove the top lens.
Remove the bottom panel.
Remove the top panel.
Remove the CD mechanism assembly.
[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.)

VS-DT2000R
1-9
Fig.10
Fig.11
Fig.12
Wire clamp
Wire holder
Earth wire
Main board
CN191
CN194
CN192
CN181 Power amplifier
board
L
M
L'K
Main board
Q
Power amplifier
board
Heat sink
Fan motor
CN192
CN193
Hook e
Hook e
Rear panel N
QP
P
Power transformer
L
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.
[Reference]
It is not necessary to remove the wire from
the fan motor.
Removing the main board
(See Figs. 10 and 11.)
1.
2.
3.
4.
5.
6.
7.
Disconnect the wire from connector CN192 on the
power amplifier board.
Disengage the wire clamp bundling the wire of the
power transformer.
Disconnect the wires from connectors CN181,
CN191 and CN194 on the main board.
Remove the screw K, which retains the main
board, together with the wire holder.
Remove the two screws L, screw L' and screw M
attaching the main board.
Remove the two screws Nattaching the main
board and then remove the rear panel.
Take out the main board from the bottom chassis.
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.
Removing the power amplifier board
(See Fig. 12.)
1.
2.
Disconnect the wires from connectors CN192 and
CN193 on the power amplifier board.
Remove the two screws Pattaching the fan motor.
Remove the top lens.
Remove the bottom panel.
Remove the top panel.
Remove the CD mechanism assembly.
3.
4.
Remove the two screws Qattaching the power
amplifier board.
Lift the power amplifier board, disengage the two
hooks efrom the heat sink of the main board and
take out the power amplifier board.

VS-DT2000R
1-10
Tie band
Fig.13
Fig.14
P
Fan motor
Bottom chassis
Wire clamp
Main board
Treat the wire from the fan motor.
Power amplifier
board
Power transformer
CN191
CN194
CN192
CN181
Fan motor
R
Washers
Removing the power transformer
(See Fig. 13.)
1.
2.
3.
4.
Disengage the wire clamp and tie band bundling
the wires of the power transformer.
Disconnect the wire from connector CN192 on the
power amplifier board.
Disconnect the wires from connectors CN191 and
CN194 on the main board.
Remove the two screws Rand two washers
attaching the power transformer.
Removing the fan motor
(See Figs. 13 and 14.)
1.
2.
Disconnect the wire from connector CN181 on the
main board.
From the right side of the main body, remove the
two screws Pattaching the fan motor.
Remove the top lens.
Remove the bottom panel.
Remove the top panel.
Remove the CD mechanism assembly.
[Reference]
After connecting the wires, bundling them
using a wire clamp and tie band.
Remove the top lens.
Remove the bottom panel.
Remove the top panel.
Remove the CD mechanism assembly.
Remove the front panel assembly.
[Reference]
After mounting the fan motor, treat the wire
from the fan motor as shown in fig. 13.

VS-DT2000R
1-11
Fig.15
Fig.16
Fig.17
Fig.18
Fig.19
Fig.20
X
Door motor
Stop washer
Washer
Open/Close
board
Gear 2
Switch board
Door motor assembly
Front panel assembly
(Back side)
Clutch assembly
Y
Z
W
T
S
Front panel assembly
(Back side) Rod gear assembly
f
Front base
Moving panel assembly
g
hh
Moving base
Hole
Front board
i
Card wire
Moving panel
Door motor assembly
Front base
Z'
Wire
<Front panel assembly section>
Removing the switch board
(See Fig. 15.)
From the back side of the front panel assembly,
remove the four screws Sattaching the switch
board.
Remove the top lens.
Remove the bottom panel.
Remove the top panel.
Remove the CD mechanism assembly.
Remove the front panel assembly.
Removing the front board
(See Figs. 17 to 20.)
1.
2.
From the back side of the front panel assembly,
remove the two screws Tattaching the door motor
assembly.
Remove the screw Wattaching the open/close
board of the door motor assembly.
Removing the open/close board
(See Figs. 15 and 16.)
1.
2.
3.
Remove the stop washers attaching the clutch
assembly and gear 2.
Remove the clutch assembly, washer and Gear 2.
Remove the two screws Xattaching the door
motor.
Removing the door motor (See Fig. 16.)
Remove the door motor assembly.
1.
2.
3.
4.
5.
6.
7.
While widening section fof the front base in the
direction of the arrow, remove the rod gear
assembly.
Slide the moving panel assembly all the way in the
direction of the arrow.
While slightly widening sections gtoward the front,
take out the moving panel assembly in the direction
of the arrow.
Remove the two screws Yattaching the moving
base of the moving panel assembly.
Disengage the engagement sections hon the
inside of the moving base and at the inside of the
moving panel assembly and remove the moving
base.
Remove the screw Zand screw Z' attaching the
front board.
Disengage the claws iof 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.

VS-DT2000R
1-12
Fig.1
Fig.2
Fig.3
LED board
Top chassis
Claw a
Engagement section d
Short land section b
CN611
CN601
Top chassis
CD mechanism assembly
CN612
Projection cB
A
A
CD servo board
Flexible wire
Protector
<CD mechanism assembly section>
Removing the LED board (See Fig. 1.)
From the top side of the CD mechanism assembly,
disengage the claw aof the top chassis attaching
the LED board and then remove the LED board.
[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.
Removing the CD mechanism
assembly (See Fig. 2.)
From the back side of the CD mechanism
assembly, remove the three screws Aattaching the
CD mechanism assembly on the top chassis.
Raise the protector in the direction of arrow and
then remove the CD mechanism assembly.
Removing the CD servo board
(See Fig. 3.)
[Caution] In the assembly, be sure to remove
solder from the short land section b
after connecting the flexible wire.
1.
2.
3.
4.
5.
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.
Disconnect the flexible wire from connector CN601
on the CD servo board.
Disconnect the card wires from connectors CN611
and CN612 on the CD servo board.
Remove the two screws Battaching the CD servo
board.
Lift the front edge of the CD servo board slightly
and disengage it from the projection cand then
from the engagement section d.
1.
2.

VS-DT2000R
1-13
Fig.4
Fig.5
Fig.6
Claw e
Traverse mechanism
assembly
Section f
C
DD
Shaft
Pickup unit
Pickup unit
Traverse mechanism assembly
Rack plate
P.S. spring
G
F
E
E
CD servo board
bracket
Shaft
Removing the traverse mechanism
assembly (See Fig. 4.)
1.
2.
3.
Remove the CD servo board.
Remove the two screws Cattaching the CD servo
board bracket.
Remove the two screws Dattaching the traverse
mechanism assembly.
Disengage the claw eattaching the traverse
mechanism assembly and then take out the
traverse mechanism assembly.
Removing the pickup unit
(See Figs. 5 and 6.)
1.
2.
3.
4.
5.
Remove the CD servo board.
Remove the traverse mechanism assembly.
From the top side of the traverse mechanism
assembly, remove the two screws Eattaching the
shaft.
From the traverse mechanism assembly, disengage
the section fof the pickup unit and then remove the
pickup unit with the shaft.
Pull the shaft out of the pickup unit.
Remove the screw Fattaching the rack plate from
the pickup unit.
Remove the screw Gattaching the P.S. spring from
the pickup unit.

VS-DT2000R
1-14
Fig.7
Fig.8
Fig.9
Section f
Groove g
Groove h
Traverse mechanism assembly
Spindle motor
Feed motor
Red
Red
Black Traverse
mechanism board
H
J
H
Section j
Rack prate
E
Attaching the pickup unit
(See Figs. 7 and 8.)
1.
2.
3.
4.
Attach the P.S. spring and rack plate to the pickup
unit.
Insert the shaft into the pickup unit.
Engage the section fof the pickup unit with the
traverse mechanism assembly first, and set the
both ends of the shaft in the grooves gand h.
After making sure that the section jof the rack plate
is meshed correctly with the middle gear, attach the
shaft using the two screws E.
[Reference]
Refer to the explanation of "Removing the
pickup unit" on the preceding page.
Removing the traverse mechanism
board (See Fig. 9.)
1.
2.
Remove the CD servo board.
Remove the traverse mechanism assembly.
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.
Remove the two screws Hattaching the traverse
mechanism board.
Removing the feed motor (See Fig. 9.)
1.
2.
Remove the CD servo board.
Remove the traverse mechanism assembly.
From the back side of the traverse mechanism
assembly, disconnect the feed motor wires that are
soldered on the traverse mechanism board.
Remove the two screws Jattaching the feed motor.

VS-DT2000R
1-15
Fig.10
Fig.11
Fig.12
CD mechanism assembly Clamper base assembly
Roller holder
assembly
Belt
Loading motor assembly
CN103 CN104
CD switch board
CN101
K
N
L
M
M
N
L
Removing the CD switch board
(See Fig.10.)
1.
2.
Remove the CD mechanism assembly.
From the top side of the CD mechanism assembly,
remove the screw Kattaching the CD switch board.
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.)
1.
2.
3.
4.
5.
6.
7.
Remove the CD mechanism assembly.
From the back side of the CD mechanism
assembly, disconnect the card wire from connector
CN612 on the CD servo board. (See Fig.3.)
From the top side of the CD mechanism assembly,
remove the two screws Lattaching the clamper
base assembly.
Disconnect the wire from connector CN101 on the
switch board while lifting the clamper base
assembly slightly and remove the clamper base
assembly.
Remove the three screws Mattaching the roller
holder assembly and take out the roller holder
assembly.
Disconnect the wires from connectors CN103 and
CN104 on the loading motor assembly.
Remove the belt of the loading motor assembly.
Remove the two screws Nattaching the loading
motor assembly and take out the loading motor
assembly.

VS-DT2000R
1-16
Fig.1
Fig.2
Fig.3
Connectors
Amplifier assembly
Amplifier assembly
A
A
AA
Knob
Back panel
B
<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 Aattaching the amplifier
assembly.
Remove the connectors from the speaker.
1.
2.
Pull out the knob and remove it.
Remove the three screws Battaching the back
panel.
Removing the back panel (See Fig. 3.)
Remove the amplifier assembly.

VS-DT2000R
1-17
Fig.4
Volume bracket
CN211
CN251
Tie band
Tie band
CN299
Pre-amplifier
board
C
Fig.5
Fig.6
Power supply
board
Power transformer
Switch board
CN281 CN291
Wire holder
D
D
D
E
Switch board
AC bracket
Power
transformer
F
F
Power supply board
Removing the pre-amplifier board
(See Fig. 4.)
1.
2.
3.
4.
Remove the two screws C attaching the pre-
amplifier board from the volume bracket.
Disengage the tie band bundling the wires from the
power transformer.
Disconnect the connector CN211 on the pre-
amplifier board from the power supply board.
Disconnect the wire from connector CN251 on the
pre-amplifier board.
Remove the amplifier assembly.
Remove the back panel.
Removing the power supply board
(See Fig. 5.)
1.
2.
3.
Remove the five screws Dattaching the power
supply board.
Remove the screw Eattaching the power supply
board and wire holder.
Disconnect the wires from connectors CN281 and
CN291 on the power supply board.
Remove the amplifier assembly.
Remove the back panel.
Remove the pre-amplifier board.
Removing the switch board
(See Fig. 6.)
1.
2.
3.
Remove the three screws Fattaching the AC
bracket.
Disengage the tie band bundling the wires from the
power transformer.
Disconnect the wire from connector CN299 on the
switch board.
Remove the amplifier assembly.
Remove the back panel.
Remove the pre-amplifier board.
Remove the power supply board.

VS-DT2000R
1-18
Fig.7
Fig.8
Fig.9
LED board
CN061
J
Fig.10
Ornament window (Back side)
Ornament window
Section aSection a
Power
transformer
Cord cover
H
G
H
Washers
Washer
Washer
Removing the power transformer
(See Figs. 7 and 8.)
1.
2.
Remove the two screws Gattaching the cord cover.
Remove the four screws Hand four washers
attaching the power transformer.
Remove the amplifier assembly.
Remove the back panel.
Remove the pre-amplifier board.
Remove the power supply board.
Removing the LED board
(See Figs. 9 and 10.)
1.
2.
3.
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.
From the back side of the ornament window,
remove the two screws Jattaching the LED board.
Disconnect the wire from connector CN061 on the
LED board.

VS-DT2000R
1-19
Flow of functional operation until TOC read
Slider turns REST
SW ON.
Automatic tuning
of TE offset
Laser ON
Detection of disc
Automatic measurement of
Focus S-curve amplitude
Automatic tuning of
Focus offset
Disc is rotated
Focus servo ON
(Tracking servo ON)
Automatic tuning of
Tracking error balance
Automatic measurement of
Tracking error amplitude
Automatic tuning of
Focus error balance
Disc to be
braked to stop
Tracking
servo
on states
Tracking
servo
off states
Disc states
to rotate TOC reading
finishes
Automatic measurement
of TE amplitude and
automatic tuning of
TE balance
500mv/div
2ms/div Fig.1
Approx.3sec
Pin 20 of
IC601(TEOUT)
Approx
1.8V
VREF
Tracking error waveform at TOC reading
Power ON Play Key
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.)
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.
Confirm that the voltage at the pin3
of CN611 is "H"\"L"\"H".
Check Point

VS-DT2000R
1-20
SOURCE PRESET VOL
COMPACT COMPONENT SYSTEM
Error code
COMPACT COMPONENT SYSTEM
SOURCE PRESET VOL
Error code indication
Error code is indicated on the FL display.
Error code contents
SOURCE PRESET VOL
FL indication
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
Phenomenon
SOURCE PRESET VOL
This unit is placed horizontally.
This unit is placed vertically.