JVC XV-M512SL Service Manual
A0037200210
XV-M512SL
SERVICE MANUAL
DVD VIDEO PLAYER
XV-M512SL
TABLE OF CONTENTS
1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Adjustment method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5 Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
No.A0037
2002/11
XV-M512SL
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 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 reassembling.
(5) Leakage shock hazard testing)
After reassembling the product, always perform an isolation
check on the exposed metal parts of the product (antenna
terminals, knobs, metal cabinet, screw heads, headphone
jack, control shafts, etc.) to be sure the product is safe to
operate without danger of electrical shock.
Do not use a line isolation transformer during this check.
• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage
current must not exceed 0.5mA AC (r.m.s.).
• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC
voltmeter having, 1,000 ohms per volt or more sensitivity in
the following manner. Connect a 1,500 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
SECTION 1
voltmeter.
Move the resistor connection to each exposed metal part,
particularly any exposed metal part having a return path to
the chassis, and measure the AC voltage across the
resistor. Now, reverse the plug in the AC outlet and repeat
each measurement. Voltage measured any must not
exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC
(r.m.s.).
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that
these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant
safety standards.
(4) It is essential that safety critical components are replaced
by approved parts.
(5) If mains voltage selector is provided, check setting for lo-
cal voltage.
1.3 Caution
Burrs formed during molding may be left over on some
parts of the chassis.
Therefore, pay attention to such burrs in the case of preforming repair of this system.
1.4 Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety.
When replacing them, be sure to use the parts of the same type
and rating as specified by the manufacturer. (Except the JC version)
2
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)
XV-M512SL
(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.
3
XV-M512SL
1.7 Precautions for Service
1.7.1 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) 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.
(5) 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.
1.7.2 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.
When you remove the traverse mechanism from the servo control substrate
The laser diode of pick-up might be destroyed by static electricity and set switch (S11) on the pick-up board on "SHORT" side, please
before removing the card wire from connector (CN10).
Moreover, please set switch (S11) on "OPEN" side after assembling and inserting the card wire in connector (CN10) without fail at
times.
When you remove the pick-up from the traverse mechanism
The laser diode of the pick-up might be destroyed by static electricity, and solder with part a, please before extracting a flexible wire
from connector (CN12).
Moreover, please remove solder in part a after inserting a flexible wire in connector (CN12).
4
1.8 Important for laser products
(1) CLASS 1 LASER PRODUCT
(2) DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
(3) CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
(4) CAUTION : The compact disc player uses invisible laser
radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are de feated.
It is dangerous to defeat the safety switches.
VARNING
Osynlig laserstrålning är denna del är öppnad och spårren är
urkopplad. Betrakta ej strålen.
VARO
Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.
XV-M512SL
(5) CAUTION : If safety switches malfunction, the laser is able
to function.
(6) CAUTION : Use of controls, adjustments or performance
of procedures other than those specified herein may result
in hazardous radiation exposure.
CAUTION
Please use enough caution not to see the beam directly
or touch it in case of anadjustment or operation check.
ADVARSEL
Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er
ude af funktion. Undgå udsasttelse for stråling.
ADVARSEL
Usynlig laserstråling ved åpning, når sikkerhetsbryteren er
avslott. unngå utsettelse for stråling.
5
XV-M512SL
SECTION 2
Disassembly method
2.1 Main body
2.1.1 Removing the top cover
(See Fig.1)
(1) Remove the two screws A attaching the top cover on the
back of the body.
(2) Remove the four screws B attaching the top cover on both
sides of the body.
(3) Pull the lower parts of the top cover sides and remove the
top cover in the direction of the arrow.
Fig.1
2.1.2 Removing the front panel assembly
(See Fig.2 to 5)
• Prior to performing the following procedure, remove the top cover.
(1) Disconnect the wire from connector CN971 and CN981 on the power supply board.
(2) Remove the screw C attaching the lug wire on the chassis base.
(3) Disconnect the card wire from connector CN703 on the system control board.
(4) Remove the three screws D attaching the front panel assembly on the bottom of the body.
(5) Release the joint a on the bottom and the two joints b on both sides of the body. Remove the front panel assembly toward the
front.
Fig.4
Fig.2
Fig.5
Fig.3
6
2.1.3 Removing the rear panel
(See Fig.6)
• Prior to performing the following procedure, remove the top
cover.
(1) Remove the eleven screws E attaching the rear panel on
the back of the body and detach the rear panel.
2.1.4 Removing the DVD changer mechanism assembly
(See Fig.7)
• Prior to performing the following procedure, remove the top
cover and front panel assembly.
(1) Disconnect the connector wire from connector CN961 on
the power supply board.
(2) Disconnect the card wire from connector CN601 on the
video board.
(3) Disconnect the card wires from connector CN701 and
CN702 on the system control board.
(4) Remove the four screws F attaching the DVD changer
mechanism assembly.
• It is easy for removing the front panel assembly to remove the
mechanism assembly though the mechanism assembly can
be removed even in the state that the front panel assembly
adheres.
XV-M512SL
Fig.6
Fig.7
7
XV-M512SL
2.1.5 Removing the power supply board
(See Fig.8 and 9)
• Prior to performing the following procedure, remove the top
cover.
(1) Disconnect the wire from connector CN971 and CN981 on
the power supply board (The wire is extending from the
front panel assembly).
(2) Disconnect the connector wire from connector CN961 on
the power supply board (The wire is extending from the
DVD changer mechanism assembly).
(3) Disconnect the wire from connector CN951 and CN952 on
the power supply board (The wire is extending from the
system control board).
(4) Remove the screw E attaching the AC jack on the rear
panel.
(5) Remove the two screws G attaching the power supply
board and detach the power supply board.
Fig.8
Fig.9
8
2.1.6 Removing the video board
(See Fig.10 and 11)
• Prior to performing the following procedure, remove the top
cover.
(1) Disconnect the card wire from connector CN601 on the
video board (The card wire is extending from the DVD
changer mechanism assembly).
(2) Disconnect the wire from connector CN704 on the system
control board (The wire is extending from the video board).
(3) Remove the three screws E attaching the video board on
the rear panel. Pull out the video board from the rear panel.
XV-M512SL
Fig.10
2.1.7 Removing the system control board
(See Fig.12 and 13)
• Prior to performing the following procedure, remove the top
cover.
• The system control board can be removed even if the video
board is attached.
(1) Disconnect the card wire from connector CN703 on the
system control board (The card wire is extending from the
front panel assembly).
(2) Disconnect the card wire from connector CN701 and
CN702 on the audio board (The card wires are extending
from the DVD changer mechanism assembly).
(3) Disconnect the wire from connector CN704 on the system
control board (The wire is extending from the video board).
(4) Disconnect the wire from connector CN951 and CN952 on
the power supply board (The wire is extending from the
system control board).
(5) Remove the screw H attaching the system control board.
(6) Remove the four screws E attaching the system control
board on the rear panel. Pull out the system control board
toward the front.
Fig.11
Fig.12
Fig.13
9
XV-M512SL
2.2 Front panel assembly
• Prior to performing the following procedure, remove the top
cover and the front panel assembly.
2.2.1 Removing the front board
(See Fig.14 and 15)
(1) Remove the two screws I on the back of the front panel
assembly and remove the bracket from the front panel assembly.
(2) Remove the seven screws J attaching the front board.
If necessary, unsolder FW803 and disconnect the wire.
2.2.2 Removing the MIC jack board
(See Fig.14 and 16)
(1) Remove the two screws I on the back of the front panel
assembly and remove the bracket from the front panel assembly.
(2) Remove the four screws K on the back of the front panel
assembly.
Fig.14
Fig.15
10
Fig.16
2.3 Ejecting the DVD
(See Fig.17 and 18)
2.3.1 When the DVD is set or the traverse mechanism is up.
note:
The DVD tray can not be ejected when the traverse mechanism is up.
2.3.2 Bringing down the traverse mechanism as shown in
the Fig.17 and 18
(1) The motor pulley and the belt can be seen on the front side
of the changer. Turn the motor pulley clockwise until the
belt stops.
(2) Pull the tray lock lever on the left side of the changer and
draw the DVD tray.
(3) Draw the DVD tray 1 to 3 as above.
XV-M512SL
Fig.17
Fig.18
11
XV-M512SL
3.1 DVD Changer Mechanism Section
3.1.1 Removing the DVD mechanism board
(See Fig.1)
(1) Remove the DVD changer mechanism assembly.
(2) From bottom side the DVD changer mechanism assem-
bly, remove the one screw A retaining the DVD servo control board.
(3) Disconnect the card wire from the connector CN101 on the
DVD servo control board.
(4) Disengage the one engagement a and two engagements
b, remove the DVD servo control board.
ATTENTION:
The laser diode of pick-up might be destroyed by static electricity and set switch (S11) on the pick-up board on “SHORT”
side, please before removing the card wire from connector
(CN101).
Moreover, please set switch (S11) on “OPEN” side after assembling and inserting the card wire in connector (CN101)
without fail at times.
SECTION 3
Mechanism
3.1.2 Removing the DVD tray assembly
(See Fig.2 to 4)
(1) Remove the screw B retaining the Disc stopper (See
Fig.3).
(2) Remove the three screws C retaining the T.bracket (See
Fig.3).
(3) From the clamper base section c, remove both of the edg-
es fixing the rod (See Fig.2 and 3).
(4) Remove the screw D retaining the clamper assembly
(See Fig.3).
(5) From the left side face of the chassis assembly, remove
the one screw E retaining both of the return spring and
lock lever (See Fig. 4).
(6) By removing the pawl at the section d fixing the return
spring, dismount the return spring (See Fig.4).
(7) Remove the three lock levers (See Fig.4).
Fig.1
Fig.3
12
Fig.2
Fig.4
(8) Check whether the lifter unit stopper has been caught into
the hole at the section e of DVD tray assembly as shown
in Fig.5.
(9) Make sure that the driver unit elevator is positioned as
shown in Fig.6 from to the second or fifth hole on the left
side face of the DVD Traverse mechanism assembly.
Caution:
In case the driver unit elevator is not at above position,
set the elevator to the position as shown in Fig.7 by
manually turning the pulley gear as shown in Fig.8.
(10) Manually turn the motor pulley in the clockwise direction
until the lifter unit stopper is lowered from the section e of
DVD tray assembly (See Fig.8).
(11) Pull out all of the three stages of DVD tray assembly in the
arrow direction f until these stages stop (See Fig.6).
(12) At the position where the DVD tray assembly has stopped,
pull out the DVD tray assembly while pressing the two
pawls g and g' on the back side of DVD tray assembly
(See Fig.9). In this case, it is easy to pull out the assembly
when it is pulled out first from the stage DVD tray assembly.
XV-M512SL
Fig.7
Fig.5
Fig.8
Fig.9
Fig.6
13
XV-M512SL
3.1.3 Removing the DVD mechanism assembly
(See Fig.10)
(1) While turning the cams R1 and R2 assembly in the arrow
direction h, align the shaft i of the DVD mechanism assembly to the position shown in Fig.10.
(2) Remove the four screw F retaining the DVD mechanism
assembly.
3.1.4 Removing the DVD traverse mechanism assembly
(See Fig.11 and 12)
(1) For dismounting only the DVD mechanism without remov-
ing the DVD mechanism assembly, align the shaft j of the
DVD mechanism assembly to the position shown Fig.11
while turning the cam R1 and R2 assembly in the arrow direction k.
(2) Remove the two screws G raising the DVD mechanism
assembly.
(3) Remove the DVD traverse mechanism assembly in the ar-
row direction I from the lifter unit (See Fig.12)
Fig.10
Fig.12
14
Fig.11
3.1.5 Removing the mechanism control board
(See Fig.14, 15)
(1) Absorb the four soldered positions m of the right and left
motors with a soldering absorber (See Fig.14).
(2) Remove the two screws H retaining the mechanism con-
trol board (See Fig.14).
(3) Remove the two screws I retaining the tray select switch
board (See Fig.15).
3.1.6 Removing the cam unit
(See Fig.15 to 18)
(1) Remove the DVD mechanism assembly.
(2) While turning the cam gear L, align the pawl n position of
the drive unit to the notch position (Fig.15) on the cam
gear L.
(3) Pull out the drive unit and cylinder gear (See Fig.17).
(4) While turning the cam gear L, align the pawl o position of
the select lever to the notch position (Fig.18) on the cam
gear L.
(5) Remove the four screws J retaining the cam unit (cam
gear L and cams R1/R2 assembly)(See Fig.18).
XV-M512SL
Fig.16
Fig.14
Fig.15
Fig.17
Fig.18
15
XV-M512SL
3.1.7 Removing the actuator motor and belt
(See Fig.19 to 22)
(1) Remove the two screws K retaining the gear bracket (See
Fig.19).
(2) While pressing the pawl p fixing the gear bracket in the ar-
row direction, remove the gear bracket (See Fig.19).
(3) From the notch q section on the chassis assembly fixing
the edge of gear bracket, remove and take out the gear
bracket (See Fig.20).
(4) Remove the belts respectively from the right and left actu-
ator motor pulleys and pulley gears (See Fig.19).
(5) After turning over the chassis assembly, remove the actu-
ator motor while spreading the four pawls r fixing the right
and left actuator motors in the arrow direction (See Fig.
21).
Note:
When the chassis assembly is turned over under the conditions wherein the gear bracket and belt have been removed,
then the pulley gear as well as the gear, etc. constituting the
gear unit can possibly be separated to pieces. In such a case,
assemble these parts by referring to the assembly and configuration diagram in Fig.22.
Fig.20
Fig.19
Fig.21
16
Fig.22
3.1.8 Removing the cams R1/R2 assembly and cam gear L
(See Fig.23)
(1) Remove the slit washer fixing the cams R1 and R2 assem-
bly.
(2) By removing the two pawls s fixing the cam R1, separate
R2 from R1.
(3) Remove the slit washer fixing the cam gear L.
(4) Pull out the cam gear L from the C.G. base assembly.
3.1.9 Removing the C.G. base assembly
(See Fig.23 and 24)
Remove the three screws L retaining the C.G. base assembly.
Caution:
To reassemble the cylinder gear, etc.with the cam unit (cam
gear and cams R1/R2 assembly), gear unit and drive unit,
align the position of the pawl n on the drive unit to that of the
notch on the cam gear L. Then, make sure that the gear unit
is engaged by turning the cam gear L (See Fig. 24).
XV-M512SL
Fig.23
Fig.24
17
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