JVC XV-S300BK User manual

SERVICE MANUAL
DVD VIDEO PLAYER
No.A0029
Apr. 2002
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
XV-S300BK / XV-S302SL
XV-S300BK/XV-S302SL
This service manual is printed on 100% recycled paper.
Contents
Safety precautions ------------------------ 1-2
Preventing static electricity ------------- 1-3
Precautions for service ------------------ 1-4
Important for laser products ------------ 1-5
Disassembly method --------------------- 1-6
Adjustment method ----------------------- 1-15
Attention when pick-up is exchanged - 1-19
Comfirm method of operation ---------- 1-20
Troubleshooting --------------------------- 1-21
Description of major ICs ----------------- 1-25
Each difference point
XV-S300BK
XV-S302SL
Black
Silver
Model Body color
OPEN/CLOSE
STANDBY/ON
STANDBY DOLBY
DVD/SUPER VCD/VCD/CD PLAYER
SKIP
PAUSEPLAYSTOP
D I G I T A L
OPEN/
CLOSE
STANDBY/ON
123
456
789
10 0 +10
PLAY
MODE
SUB TITLE AUDIO THEATER
POSITION
3D
PHONIC DIGEST ANGLE ZOOM
PREVIOUS
CLEAR SELECT STROBE
NEXT
RETURN
SLOW
-
SLOW
+
CANCEL
ENTER
RM-SXV001A
REMOTE CONTROL
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Area Suffix
B --------------------------- U.K.
E ----- Continental europe
EN ------ Northern europe
EV ------- Eastern Europe
EE -- Russian Federation

XV-S300BK/XV-S302SL
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 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 current check (Electrical shock hazard testing)
After reassembling the product, always perform an isolation check on the exposed metal parts of the product
(antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the
product is safe to operate without danger of electrical shock.
Do not use a line isolation transformer during this check.
Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage
current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return
path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).
Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more
sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor
between an exposed metal part and a known good earth ground.
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. 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.
When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer.
(Except the J and C version)

XV-S300BK/XV-S302SL
1-3
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.
1.1. 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.
1.1.1. Ground the workbench
1. 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.
1.1.2. Ground yourself
1. Use an anti-static wrist strap to release any static electricity built up in your body.
1.1.3. Handling the optical pickup
1. In order to maintain quality during transport and before installation, both sides of the laser diode on the
replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power
source can easily destroy the laser diode.
1.2. 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. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it
Conductive material
(conductive sheet) or iron plate
(caption)
Anti-static wrist strap

XV-S300BK/XV-S302SL
1-4
Precautions for service
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.
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.4" of "Disassembly
method" for details.
Short circuit
CN101
Servo control
board
Short circuit

XV-S300BK/XV-S302SL
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 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 and PRINT
!Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
CLASS 1
LASER PRODUCT
CAUTION: Invisible laser
radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE
TO BEAM. (e)
ADVARSEL: Usynlig laser-
stråling ved åbning, når
sikkerhedsafbrydere er ude
af funktion. Undgå udsæt-
telse for stråling (d)
VARNING: Osynlig laser-
strålning när denna del är
öppnad och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO: Avattaessa ja suo-
jalukitus ohitettaessa olet
alttiina näkymättömälle
lasersäteilylle. Älä katso
säteeseen. (f)

XV-S300BK/XV-S302SL
1-6
Disassembly method
<Main body>
Removing the top cover (see Fig.1)
Removing the mechanism assembly
(see Fig.2,3)
Removing the servo control board (see Fig.4)
ATTENTION: Do not break the front panel tab
fitted to the top cover.
Remove the two screws Aattaching the top cover on
both sides of the body.
Remove the three screws Battaching the top cover
on the back of the body.
Remove the top cover from the body by lifting the
rear part of the top cover.
1.
2.
3.
Prior to performing the following procedure, remove
the top cover.
There is no need to remove the front panel assembly.
Remove the three screws Cattaching the mechanism
assembly on the bottom chassis.
Remove the two screws Dattaching the lug wire and
main board on the main board.
The servo control board is removed from the
connector CN961 and CN701 connected with the main
board respectively.
Remove the mechanism assembly by lifting the rear
part of the mechanism assembly.
*
*
1.
2.
3.
4.
Prior to performing the following procedure, remove
the top cover and mechanism assembly.
Disconnect the card wire from connector CN201 and
CN202 on the servo control board respectively.
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-circuited
of two places on the wire in part awith solder.
Please remove the solder two places of part aafter
connecting the wire with CN101 when reassembling.
Two places in hook bare removed, the servo control
board is lifted, and it is removed.
*
1.
2.
3.
A x 2
B
B
B
Fig.1
CN701 CN961
Servo control board
Main board
Mechanism
assembly
Fig.3
Hook b Hook b
Servo control
board
Fig.4
CN201
CN101
CN202
Part a
CC
C
CN702 CN703
Fig.2
Main board
Lug wire Mechanism assembly
D
D

XV-S300BK/XV-S302SL
1-7
Removing the rear panel (see Fig.5)
Removing the front panel assembly
(see Fig.6,7)
Removing the main board (see Fig.8)
*Prior to performing the following procedure, remove
the top cover.
1.Remove the eight screws Eattaching the rear panel
on the back of the body.
* Prior to performing the following procedure, remove
the top cover.
* There is no need to remove the mechanism assembly.
1.Remove the one screw Fattaching the front panel
assembly on the bottom chassis.
2.Disconnect the wire from CN702 and CN703 on the
main board respectively.
3.Hook cand dare removed respectively, and the front
panel assembly is removed.
* Prior to performing the following procedure, remove
the top cover, mechanism assembly and rear panel.
1.Disconnect the wire from CN702 and CN703 on the
main board respectively.
2.Remove the four screws Gattaching the main board
on the bottom chassis.
EE
Rear panel
Fig.5
F
Hook c
Hook d
Hook d
Front panel
assembly
Fig.6
Fig.7
CN702 CN703
Fig.8
G
G
G
G
Main board
CN702
CN703
Main board
Mechanism assembly

XV-S300BK/XV-S302SL
1-8
Remove the four screws Aattaching the clamper
assembly.
Move the clamper in the direction of the arrow to
release the two joints aon both sides.
1.
2.
<Loading assembly section>
Removing the clamper assembly
(See Fig.1)
Prior to performing the following procedure, remove
the clamper assembly.
Push bof the slide cam into the slot on the left side
of the loading base until it stops.
Draw out the tray toward the front.
1.
2.
Removing the tray (See Fig.2 and 3)
When reattaching, fit the clamper to
the two joints a.
ATTENTION:
Before reattaching the tray, slide the
part cof the slide cam to the right as
shown in Fig.3.
ATTENTION:
Joint a
Joint a
AA
A A
Fig.1
Fig.2
Fig.3
Push
b
Tray
Clamper base
Part c
Slide cam

XV-S300BK/XV-S302SL
1-9
Prior to performing the following procedure, remove
the clamper assembly and the tray.
Remove the four screws Battaching the traverse
mechanism assembly.
1.
Removing the traverse mechanism
assembly (See Fig.4 and 5)
Before reattaching the traverse
mechanism assembly, pass the card
wire extending from the spindle motor
board through the notch dof the
elevator.
ATTENTION:
Prior to performing the following procedure, remove
the clamper assembly, the tray and the traverse
mechanism assembly.
Extend each bar einside of the loading base
outward and detach the elevator shaft.
1.
Removing the elevator (See Fig.6 and 7)
When reattaching, first fit the two
shafts on the front of the elevator to
the slots fof the slide cam.
ATTENTION:
Fig.4
Fig.5
Fig.6Fig.7
BB
B
BB
B
Traverse mechanism
assembly
B
BB
Traverse mechanism assembly
Elevator
Notch d
Elevator
Elevator
Elevator
e
e
Loading base
Elevator
Shafts
Slide cam
Slots f

XV-S300BK/XV-S302SL
1-10
Prior to performing the following procedure, remove
the clamper assembly, the tray, the traverse
mechanism assembly and the elevator.
Remove the belt from the pulley.
Remove the screw Cattaching the motor assembly.
Turn over the body and remove the screw D
attaching the motor assembly.
Release the two tabs gretaining the motor board.
1.
2.
3.
4.
Removing the motor assembly
(See Fig.8 and 9)
Fig.8
Fig.9
C
Motor assembly
Belt
Loading base
Motor assembly
D
Tabs g

XV-S300BK/XV-S302SL
1-11
Prior to performing the following procedure, remove
the clamper assembly, the tray, the traverse
mechanism assembly, the elevator and the motor
assembly.
Press the two tabs hinward and pull out the idle
gear.
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.
Slide the slide cam in the direction of the arrow to
release the two joints iand remove upward.
Remove the middle gear.
1.
2.
3.
4.
Removing the Idle gear / pulley gear /
middle gear / slide cam (See Fig.10 to 12)
Fig.11
Fig.12
Fig.10
Motor assembly
Pulley gear
Pulley gear bracket
Pulley gear bracket
EIdle gear
Idle gear
Pulley gear
Tads h
Pulley gear
Middle gear
Joint i Joint i
Slide cam
Slide cam
Middle gear
Loading base

XV-S300BK/XV-S302SL
1-12
Prior to performing the following procedure, remove
the feed motor assembly.
Remove the screw Gattaching the thrust spring.
1.
Removing the feed motor
(See Fig.13 to 15)
Unsolder the two soldering jon the spindle motor
board.
Remove the two screws Fattaching the feed motor
assembly.
1.
2.
Removing the feed motor assembly
(See Fig.13)
When reattaching the thrust spring,
make sure that the thrust spring
presses the feed gear (M) and the feed
gear (E) reasonably.
ATTENTION:
Remove the feed gear (M).
Pull out the feed gear (E) and the lead screw.
Remove the two screws Hattaching the feed motor.
2.
3.
4.
When reattaching, pass the two cables
extending from the feed motor through
the notch kof the feed holder as
shown in Fig.13.
ATTENTION:
<Traverse mechanism assembly section>
Fig.13
Fig.14
Fig.15
F
Soldering j
Notch k
F
Feed motor assembly
Spindle motor board
Spindle motor
Feed gear (M)
Thrust spring
G
Feed gear (E)
Lead screw
Feed motor
Feed holder
H
Pickup

XV-S300BK/XV-S302SL
1-13
Remove the screw Iattaching the T spring (S) and
the shaft holder. Remove also the plate.
1.
Removing the pickup (See Fig.16 and 17)
Remove the screw Kattaching the shaft holder.
Remove the shaft.
1.
2.
Removing the shaft holder / shaft
(See Fig.18)
When reattaching, make sure that the
T spring (S) presses the shaft.
ATTENTION:
Pull out the part lof the shaft upward. Move the part
min the direction of the arrow and detach from the
spindle base.
Disengage the joint nof the pickup and the shaft in
the direction of the arrow.
Pull out the shaft from the pickup.
Remove the two screws Jattaching the actuator.
Disengage the joint of the actuator and the lead
spring. Pull out the lead spring.
2.
3.
4.
5.
6.
The spring must be under the shaft when you
install pick-up.
Fig.16
Fig.17
Fig.18
T spring (S)
Plate
Joint n
Pickup
Part m
Shaft holder
Part l
I
Shaft
Shaft
Spring
Pick-up
Pickup
Lead spring
Actuator
JActuator
Lead spring
Shaft
Shaft holder
K

XV-S300BK/XV-S302SL
1-14
Remove the three screws Lattaching the spindle
motor on the bottom of the mechanism base.
1.
Removing the spindle motor assembly
(See Fig.19 to 21)
When reattaching, pass the card wire
extending from the spindle motor
board through the notch of the spindle
base.
ATTENTION:
Remove the three screws Mattaching the spindle
base.
2. Fig.19
Fig.20
Fig.21
Spindle motor assembly
Spindle base
L
MM
Spindle base
Mechanism base
L
L
Spindle motor

XV-S300BK/XV-S302SL
1-15
Adjustment method
(1) Initialization method
(2) Display of "Laser current value" and "Jitter value"
If microprocessor (IC401,IC402,IC451,IC504) 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 display, initialize finishes.
7)The power is turned OFF, and Unplug the power plug.
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.
"Laser current value" and "Jitter value" are displayed on the FL display by the undermentioned
method. Please refer to the failure diagnosis.
0 0 3 5 1 8 B 6
FL Display
Laser current value Jitter value
* The test mode is canceled when
the power is turned off.
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.
For Laser current value
Remote control "4" button --- Laser of CD
Remote control "5" button --- Laser of DVD
*Returns to a usual test mode by the
thing to push the "STOP" button of
remote controller.
OPEN/CLOSE
STANDBY/ON
STANDBY DOLBY
DVD/SUPER VCD/VCD/CD PLAYER
SKIP
PAUSEPLAYSTOP
D I G I T A L
POWER Button
DTS Display part
(Initialize complete)
FL Display
OPEN/CLOSE
Button(Test mode)
PLAY Button
(Test mode & display of jitter)
OPEN/
CLOSE
STANDBY/ON
123
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10 0 +10
PLAY
MODE
SUB TITLE AUDIO THEATER POSITION
3D
PHONIC DIGEST ANGLE ZOOM
PREVIOUS
CLEAR SELECT STROBE
NEXT
RETURN
SLOW
-
SLOW
+
CANCEL
ENTER
RM-SXV001A
REMOTE CONTROL
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3D PHONIC
Button (Initialize start)
5 Button
(Laser of DVD)
4 Button
(Laser of CD)
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 undermentioned value.
Laser current value of CD ------ 49 mA or less
Laser current value of DVD ---- 64 mA or less

XV-S300BK/XV-S302SL
1-16
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.
For Jitter value
* 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..)
< In the following cases, please adjustment >
OPEN/CLOSE
STANDBY/ON
STANDBY
DOLBY
DVD/SUPER VCD/VCD/CD PLAYER
SKIP
PAUSEPLAYSTOP
D I G I T A L
POWER Button
DTS Display part
(Initialize complete)
FL Display
OPEN/CLOSE
Button(Test mode)
PLAY Button
(Test mode & display of jitter)
OPEN/
CLOSE
STANDBY/ON
123
456
789
10 0 +10
PLAY
MODE
SUB TITLE AUDIO THEATER POSITION
3D
PHONIC DIGEST ANGLE ZOOM
PREVIOUS
CLEAR SELECT STROBE
NEXT
RETURN
SLOW
-
SLOW
+
CANCEL
ENTER
RM-SXV001A
REMOTE CONTROL
D
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M
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3D PHONIC
Button (Initialize start)
5 Button
(Laser of DVD)
4 Button
(Laser of CD)

XV-S300BK/XV-S302SL
1-17
XV-S40 CONTROL CONNECT
XV-S40
MAIN CONNECT
(3) Flap adjustment of the pick-up guide shaft
<Tool list for adjustment>
<Connection diagram>
* Stud (four pieces set)
Parts No. : JIGXVS40 (One is not used though there are four. )
* Assistance board and extension cord
EXTXVS40MK2CB-2 CONTROL CONNECT
EXTXVS40MK2CB-2 CONTROL CONNECT
EXTXVS40MK2CB-1 MAIN CONNECT
EXTXVS40MK2CB-1 MAIN CONNECT
Parts No. : EXTXVS40MK2CB
Parts No. : EXTXVS40CB
Parts No. : EXTXV521CB These parts are not used.
CN501 XV-521
CN706 XV-521
MAIN CONNECT
XV-521 CN502
CONT CONNECT
CN701 XV-521
MAIN CONNECT
CONT CONNECT
XV-521 CN601
MAIN CONNECT
XV-521 CN503
CONT CONNECT
XV-521 CN601
MAIN CONNECT
XV-521 CN503
CONT CONNECT
* Hex wrench for adjustment
Off-the-shelf (1.3mm)
* Test disc
VT-501 or VT-502
1
1
2
2
3
3
4
4
5
5
6
6
To CN701 of main board
To CN503 of servo control board To CN502 of servo control board
To CN961 of main board

XV-S300BK/XV-S302SL
1-18
<Adjustment preparation>
<Adjustment>
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.
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.
Adjustment screw a Adjustment screw b
Adjustment
screw c
<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.
Mechanism
assembly
Stud Stud
Servo control board
Assistance
board
Assistance
board
Extension
cord
Extension
cord
Main board
Shaft & hook Servo control board
Assistance
board
Assistance
board
Assistance
board
Extension
cord
Extension
cord
Shaft & hook

XV-S300BK/XV-S302SL
1-19
Attention when pick-up is exchanged
CN101
Switch actuator
Lead spring
Pick-up
Pick-up spring
Flexible wire
Short land
part "a"
Flexible wire
Connector
Short land
part "a"
Electrostatic breakdown
protection circuit
Servo control
board
Electrostatic breakdown
protection circuit
Cutting part
1.Flexible wire, pick-up spring, switch actuator,
and lead spring are removed from an old pick-up
(broken the one).
< Guide >
Flexible wire, pick-up spring and switch actuator,
lead spring are removed without each decomposing
while assembled.
2.The above-mentioned parts are installed in a new
pick-up (non-defective article).
3.A flexible wire is inserted in the connector which has
taken side with the pick-up, and solder is put up to short
land part "a" two places on a flexible wire.
4.The electrostatic breakdown protection circuit attached
to the pick-up is cut.
Please cut the electrostatic breakdown protection circuit
attached to the pick-up after solder is put up to two places
on a flexible wire short land part "a" of the insertion of a
flexible wire this time in the connector without fail.
The procedure might be mistaken and if solder has not
surely adhered to two places on a flexible wire short land
part "a", the laser diode in the pick-up be destroyed again.
< ATTENTION >
Please remove solder in two places in part "a" after
connecting a flexible wire with connector CN101 on
the servo control board without fail this time.
When the procedure is mistaken, the laser diode in
the pick-up might be destroyed.
Please remove solder in two places in part "a" surely.
< ATTENTION >
5.The pick-up is installed in the traverse mechanism.
6.A flexible wire is connected with connector CN101 on the
servo control board by installing the traverse mechanism
in the loading mechanism.
7.Solder in two places on a flexible wire in part "a" is
removed.

XV-S300BK/XV-S302SL
1-20
Confirm method of operation
Please confirm the operation of the undermentioned item after doing the repair and
the upgrade of the firmware.
The EEPROM is initialized.
Refer to the initialization method.
Opening picture check (Power ON)
It should be display "JVC"
Muting working
The noise must not be had to the performance beginning when you
push "PLAY" button or at ON/STANDBY.
FL Display
The mark and the logo, etc. displayed by each operation must be displayed correctly.
FL Display should light correctly without any unevenness.
All Function button
All function buttons should worked correctly with moderate click feeling.
Open and close movement of tray
When press OPEN/CLOSE button the tray should move smoothly without any noise.
Remote controller unit working
Check the correctly operation in use of remote controller unit.
Reading of TOC
Be not long in the malfunction.
Search
Both forward-searches and backward-searches should be able to be done.
Do not stop be searching or after the search.
Skip
Both forward-skip and backward-skip should be able to be done.
Do not stop be after the skip.
Playback
Do not find abnormality etc. of tone quality and the picture quality.
Most outside TITLE playback check
Play VT-501 TITLE 59 CHAPTER 1 , check normal playback.