JVC XV-C3SL User manual

SERVICE MANUAL
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD. No.A0032
2002/08
XV-C3SL
DVD VIDEO PLAYER
A0032200207 XV-C3SL

XV-C3SL
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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 Important for laser products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.8 Precautions for Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Main body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Loading assembly section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Traverse mechanism assembly section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4 Adjustment method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Initialization method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2 Display of "Laser current value" and "Jitter value" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3 Flap adjustment of the pick-up guide shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.4 Attention when pick-up is exchanged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.5 Confirm method of operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.6 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.7 Check points for each error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5 Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.1 74VHC00MTC-X (IC455,IC503) : 2-input nand gate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.2 74VHC74MTC-X (IC454) : ZIVA Wait . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.3 AN8703FH-V (IC101) : Frontend processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.4 BA5983FM-X (IC201) : 4CH Driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.5 CY24203SC-X (IC571) : MPEG / Audio clock generator with VCXO . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.6 BA6664FM-X (IC251) : 3Phase Motor Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.7 74VHCT08ASJ-X (IC704) : 2-input AND gate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.8 K3N5V1000FJ004 (IC402) :P2 ROM of 1,048,576word x 16 bit / 2,097,152 word x 8 bit. . . . . . . . . . . 32
5.9 K4S641632F-TC75 (IC504) :CMOS SDRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.10 MN101C35DLD (IC701) : System controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.11 MN102L62GLH1 (IC401) : Unit CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.12 MN103S28EGA (IC301) : Super optical disc controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.13 MM1565AF-X (IC951) : 500mA Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.14 MN35505-X (IC703) : DAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.15 S-93C66AFJ-X (IC451) : EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.16 STR-G6551-F8 (IC901) : Switch regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.17 MM1566BF-X(IC601):Video signal controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.18 SI-3033LSA-X(IC952):DC Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.19 ZIVA-4.1-PB0 (IC501) : Back end - Digital decoder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

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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 void
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 characteris-
tics 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 sub-
stitute 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, particu-
larly 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 ohm 10W resistor
paralleled by a 0.15 µF 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 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 pre-
forming 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 identified by the " " mark nearby are critical for safe-
ty.
When replacing them, be sure to use the parts of the same type
and rating as specified by the manufacturer. (Except the JC version)

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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 diode) in devices such as DVD players.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can
easily destroy the laser diode.
1.6 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 using nippers, etc. after replacing the optical pickup. For specific details, refer to the
replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too
long a time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4)I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

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1.7 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.
(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.
REPRODUCTION AND POSITION OF LABEL and PRINT
WARNING LABEL
CAUTION
Please use enough caution not to see the beam directly
or touch it in case of anadjustment or operation check.
VARNING
Osynlig laserstrålning är denna del är öppnasd och spårren är
urkopplad. Betrakta ej strålen.
VARO
Avattaessa ja suojalulitus ohitettaessa olet alttiina näkymät-
tömälle lasersateilylle. Älä katso säteeseen.
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.

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1.8 Precautions for Service
1.8.1 Handling of Traverse Unit and Laser Pickup
(1) Do not touch any peripheral element of the pickup or the actuator.
(2) The traverse unit and the pickup are precision devices and therefore must not be subjected to strong shock.
(3) Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the internal power supply of the tester.)
(4) To replace the traverse unit, pull out the metal short pin for protection from charging.
(5) When replacing the pickup, after mounting a new pickup, remove the solder on the short land which is provided at the center
of the flexible wire to open the circuit.
(6) Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block.
Do not change the setting of these half-fixed resistors for laser power adjustment.
1.8.2 Destruction of Traverse Unit and Laser Pickup by Static Electricity
Laser diodes are easily destroyed by static electricity charged on clothing
or the human body. Before repairing peripheral elements of the traverse unit or pickup, be sure to take the following electrostatic
protection:
(1) Wear an antistatic wrist wrap.
(2) With a conductive sheet or a steel plate on the workbench on which the traverse unit or the pick up is to be repaired, ground
the sheet or the plate.
(3) After removing the flexible wire from the connector (CN101), short-circuit the flexible wire by the metal clip.
(4) Short-circuit the laser diode by soldering the land which is provided at the center of the flexible wire for the pickup.
After completing the repair, remove the solder to open the circuit.
Please refer to "Fig.6" of "Disassembly method" for details.

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SECTION 2
Disassembly method
2.1 Main body
There is a part different from the photograph according to the
model and the destination though explains this disassembly
method by using XV-C3SL for Europe.
2.1.1 Removing the top cover
(see Fig.1)
(1) Remove the two screws Aattaching the top cover on both
sides of the body.
(2) Remove the three screws Battaching the top cover on the
back of the body.
(3) The slide is done backward and a top cover is removed.
Fig.1
2.1.2 Removing the front panel assembly and bracket
(see Fig.2,3)
• Prior to performing the following procedure, remove the top cover.
(1) Disconnect the flat wire from connector CN704,JT702,
JT703 on the main board.
(2) Four places in hook a and b are removed, the front panel as-
sembly is slide to forward and it is removed.
(3) Remove the two screws Cattaching the bracket.
Fig.2
Fig.3

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2.1.3 Removing the mechanism assembly
(see Fig.4,5)
• Prior to performing the following procedure, remove the top
cover, front panel assembly and bracket.
(1) Remove the three screws Dattaching the mechanism as-
sembly.
(2) The servo control board is removed from the connector
CN961 and CN701 connected with the main board re-
spectively.
Fig.4
Fig.5
2.1.4 Removing the servo control board
(see Fig.6)
• Prior to performing the following procedure, remove the top
cover, front panel assembly, bracket and mechanism assem-
bly.
(1) Disconnect the card wire from connector CN201 and
CN202 on the servo control board respectively.
(2) Disconnect the flexible wire from connector CN101 on the
servo control board from pick-up
ATTENTION:
At this time, please extract the wire after short-cir-
cuited of two places on the wire in part c withsolder.
Please remove the solder two places of part c after
connecting the wire with CN101 when reassem-
bling.
(3) Two places in hook dare removed, the servo control
board is lifted, and it is removed. Fig.6

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2.1.5 Removing the rear panel and audio output board
(see Fig.7)
• Prior to performing the following procedure, remove the top
cover.
(1) Remove the nine screws Eattaching the rear panel.
(2) Disconnect the card wire from connector CN706 on the
audio output board.
(3) Remove the one screw Fattaching the audio output board.
(4) Disconnect the power cord from socket P901 on the main
board.
Fig.7
2.1.6 Removing the main board
(see Fig.8)
• Prior to performing the following procedure, remove the top
cover, front panel assembly, bracket, mechanism assembly,
rear panel and audio output board.
(1) Remove the four screws Gattaching the main board.
Fig.8

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SECTION 3
MECHANISM
3.1 Loading assembly section
3.1.1 Removing the clamper assembly
(See Fig.1)
(1) Remove the four screws Aattaching the clamper assembly.
(2) Move the clamper in the direction of the arrow to release
the two joints a on both sides.
ATTENTION:
When reattaching, fit the clamper to the two joints a.
Fig.1
3.1.2 Removing the tray
(See Fig2. and 3)
• Prior to performing the following procedure, remove the
clamper assembly.
(1) Push b of the slide cam into the slot on the left side of the
loading base until it stops.
(2) Draw out the tray toward the front.
ATTENTION:
Before reattaching the tray, slide the part c of the slide
cam to the right as shown in Fig.2.
Fig.2
Fig.3

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3.1.3 Removing the traverse mechanism assembly
(See Fig.4 and 5)
• Prior to performing the following procedure, remove the
clamper assembly and the tray.
(1) Remove the four screws Battaching the traverse mechanism
assembly.
ATTENTION:
Before reattaching the traverse mechanism assembly,
pass the card wire extending from the spindle motor
board through the notch d of the elevator. Fig.4
Fig.5
3.1.4 Removing the elevator
(See Fig.6)
• Prior to performing the following procedure, remove the
clamper assembly, the tray and the traverse mechanism as-
sembly.
(1) Extend each bar einside of the loading base
outward and detach the elevator shaft.
ATTENTION:
When reattaching, first fit the two shafts on the
front of the elevator to the slots f of the slide cam.
Fig.6

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3.1.5 Removing the motor assembly
(See Fig.7 and 8)
• Prior to performing the following procedure, remove the
clamper assembly, the tray.the traverse mechanism assembly
and the elevator.
(1) Remove the belt from the pulley.
(2) Remove the screw C attaching the motor assembly.
(3) Turn over the body and remove the screw D attaching the
motor assembly.
(4) Release the two tabs gretaining the motor board.
Fig.7
Fig.8

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3.1.6 Removing the Idle gear/pully gear/
middle gear/slitecam
(See Fig.9 to 11)
• Prior to performing the followong procedure,remove
the clamper assembly,the tray,the traverse mechanism
assembly,the elevator and the motor assembly.
(1) Press the two tabs h inward and pull out idle gear.
(2) Remove the screw Eattaching the pulley gear bracket.
Slide the pulley gear bracket in the direction of the
arrow and pull out the pulley gear.
(3) Slide the side cam in the direction of the arrow to
release the two joints iand remove upward.
(4) Remove the middle gear.
Fig.9
Fig.10
Fig.11

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3.2 Traverse mechanism assembly section
3.2.1 Removing the feed motor assembly
(See Fig.12)
(1) Unsolder the two soldering j on the spindle motor board.
(2) Remove the four screws Fattaching the feed motoras-
sembly.
Fig.12
3.2.2 Removing the feed motor
(See Fig.12 to 14)
• Prior to performing the following procedure, remove the feed
motor assembly.
(1) Remove the screw G attaching the thrust spring.
ATTENTION:
When reattaching the thrust spring, make sure that
the thrust spring presses the feed gear (M) and the
feed gear (E) reasonably.
(2) Remove the feed gear (M).
(3) Pull out the feed gear (E) and the lead screw.
(4) Remove the two screws Hattaching the feed motor.
ATTENTION:
When reattaching, pass the two cables extending
from the feed motor through the notch k of the feed
holder as shown in Fig12.
Fig.13
Fig.14

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3.2.3 Removing the pickup
(See Fig.16 and 18)
(1) Remove the screw I attaching the T spring (S) and the
shaft holder. Remove also the plate.
ATTENTION:
When reattaching,make sure that the T spring (S)
presses the shaft.
(2) Pull out the part l of the shaft upward. Move the part m in
the direction of the arrow and detach from the spindle
base.
(3) Disengage the joint n of the pickup and the shaft in the di-
rection of the arrow.
(4) Pull out the shaft from the pickup.
(5) Remove the two screws J attaching the actuator.
(6) Disengage the joint of the actuator and the lead spring.
Pull out the lead spring.
Fig.15
The spring must be under the shaft when you
install pick-up.
Fig.16
Fig.17
3.2.4 Removing the shaft holder / shaft
(See Fig.18)
(1) Remove the screw Kattaching the shaft holder.
(2) Remove the shaft.
Fig.18

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3.2.5 Removing the spindle motor assembly
(See Fig.19 to 21)
(1) Remove the three screws L attaching the spindle motor on
the bottom of the mechanism base.
ATTENTION:
When reattaching, pass the card wire extending from
the spindle motor board through the notch of the spin-
dle base.
(2) Remove the three screws M attaching the spindle base.
Fig.19
Fig.20
Fig.21

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SECTION 4
Adjustment method
4.1 Initialization method
If microprocessor (IC401,IC402,IC451) or pick-up is replaces, initialize the
DVD player in the following matter
(1) Take out the disc and close the tray.
(2) Unplug the power plug.
(3) Insert power plug into outlet while pressing both "PLAY" button and "OPEN/CLOSE" button.
(4) FL Display indicate "TEST * * #" , * * :Version, #" :Region code
(5) Press "3D-PHONIC" button of remote controller. and EEPROM initialize start.
(6) When indicate "DTS" on the FL display, initialize finishes.
(7) The power is turned OFF, and Unplug the power plug.
4.2 Display of "Laser current value" and "Jitter value"
"Laser current value" and "Jitter value" are displayed on the FL display by the undermentioned
method. Please refer to the failure diagnosis.
(1) Take out the disc and close the tray.
(2) Unplug the power plug.
(3) Insert power plug into outlet while pressing both "PLAY" button and "OPEN/CLOSE" button.
(4) FL Display indicate "TEST * * #" , * * :Version, #" ::Region code
(5) Press the "OPEN/CLOSE" button to move the tray outward.
Put the test disc (VT-501) on the tray and press "OPEN/CLOSE" button.
The tray should move inward (Note:Don't push to close the tray directly by hand etc.)
(6) Press the "PLAY" button.
(7) After a few seconds, the laser current value and the jitter value is displayed on the FL indicator as follows.
Fig.1
4.2.1 For Laser current value
The laser current value becomes 35mA for the above-mentioned.
Becomes a test mode by doing above-mentioned procedure 1) - 4). Afterwards, the laser current value can
be switched by pushing the button to remote controller without turning on the disk.
It can be judged it is simply good if the displayed current value of the laser is smaller than that of the undermentioned value.
Moreover, there must be a deteriorated possibility and the pick-up must exchange the pick-up more than the undermen-
tioned value. Laser current value of CD ------ 49 mA or less
Laser current value of DVD ---- 64 mA or less
Fig.2
Remote control "4" button --- Laser of CD *Returns to a usual test mode by the
Remote control "5" button --- Laser of DVD thing to push the "STOP" button of
remote controller.

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4.2.2 For Jitter value
The jitter value is displayed on the FL display referring to the previous page.
The jitter value is displayed by the hexadecimal number.
In the following cases, please "Flap adjustment of the pick-up guide shaft" referring to the following page.
Before using the TEST disc VT-501, careful check it if there is neither damage nor dirt on the read surface.
Returns to a usual test mode by the thing to push the "STOP" button ot remote controller.
< In the following cases, please adjustment >
•When you exchange the pick-up
•When you exchange the spindle motor
•When the reading accuracy of the signal is bad (There is a block noise in the screen etc..)
Fig.3

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4.3 Flap adjustment of the pick-up guide shaft
4.3.1 Tool list for adjustment
•Hex wrench for adjustment
Off-the-shelf (1.3mm)
•Test disc
VT-501 or VT-502
•Stud (four pieces set)
Parts No. : JIGXVS40 (One is not used though there are four. )
Fig.4
•Assistance board and extension cord
Fig.5
4.3.2 Connection diagram
Fig.6

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4.3.3 Adjustment preparation
(1) The mechanism assembly is made in the state from the main body from which is detached referring to the disassembly method.
(2) Three studs are installed in the mechanism assembly respectively.
(3) The servo control board is removed from the mechanism assembly, and puts into the state set up as shown in figure. (Each
wire connected by the servo control board this time leaves the connection maintained.)
Between shaft and hook of mechanism assembly of figure Board is put.
(4) The extension cord is inserted in the connector of the assistance board respectively.
The main board is connected with the servo control board as shown in figure.
Fig.7 Fig.8
4.3.4 Adjustment
(1) Puts into the state to display the jitter value on the FL display referring to "Display of the jitter value".
(2) The adjustment screw under the traverse mechanism is turned with hex wrench, and matches so that the jitter value displayed
on the FL display may become "maximum" value.
Fig.9
<POINT>
(1) Turns in the forward or the opposite direction,and
makes to the position where the jitter value is good the
half rotation of adjustment screw a and b(180 degrees)
respectively.
(2) Afterwards, adjustment screw b and c are turned in the
same way, and makes to the best position.
<ATTENTION>
(1) Values to judge whether the jitter is allowable or not is
displayed, instead of actual jitter values.
The displayed values are expressed in hexadecimal
numbers.
(2) As this value is bigger, the jitter is more allowable in this
model.