JVC XV-S56BK User manual

SERVICE MANUAL
DVD VIDEO PLAYER
No.A0019
Oct. 2001
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
XV-S56BK / XV-S57SL
XV-S56BK/XV-S57SL
Area Suffix (XV-S57SL)
B --------------------------- U.K.
E ----- Continental europe
EN ------ Northern europe
Area Suffix (XV-S56BK)
E ----- Continental europe
EN ------ Northern europe
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
Troubleshooting -------------------------- 1-18
Description of major ICs ---------------- 1-22
Model
XV-S56BK
XV-S57SL
Body color
Black
Silver
Each difference point

XV-S56BK/XV-S57SL
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 current 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 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-S56BK/XV-S57SL
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. 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.
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.
1.2. Ground yourself
1. Use an anti-static wrist strap to release any static electricity built up in your body.
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.
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 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-S56BK/XV-S57SL
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. 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. Pick-up's laser diode might be destroyed by static electricity, and put up solder to "Soldering part A",
please before extracting the card wire from connector (CN101).
4. Moreover, please remove solder from "Soldering part A" after inserting the card wire in connector (CN101)
at assembly.
Servo control
board
Soldering part A
Please refer to "Fig.4" of "Disassembly
method" for details.
Short circuit

XV-S56BK/XV-S57SL
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)
2
VIDEO OUT
COMP.Y/C
AV
VIDEO OUT
AC IN
DIGITAL OUT
VIDEO
RIGHT
S-VIDEO
PCM / STREAM
COAXIALOPTICAL
AV COMPU LINK
LEFT
FRONT
REAR
RIGHT LEFTSUBWOOFER
CENTER
AUDIO OUT

XV-S56BK/XV-S57SL
1-6
CN701 CN961 Servo control
board
Main board
Mechanism
assembly
Fig.3
A x 2
B
CCC
B
B
Fig.1
D
D
G
G
D
CN703
CN711 CN702
Fig.2
Lug wire
Fastener
Disassembly method
<Main body>
Removing the top cover (see Fig.1)
Removing the mechanism assembly
(see Fig.2,3)
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.Remove the top cover from the body by lifting the
rear part of the top cover.
Removing the surround audio board
(see Fig.1,2)
* Prior to performing the following procedure, remove
the top cover.
1.Remove the three screws Cattaching the surround
audio board on the rear panel.
2.Disconnect the card wire from CN711 on the surround
audio board.
3.The surround audio board is remove while picking
up the point of the fastener in two places.
ATTENTION: Do not break the front panel tab
fitted to the top cover.
* Prior to performing the following procedure, remove
the top cover.
* There is no need to remove the front panel assembly.
1.Remove the three screws Dattaching the mechanism
assembly on the bottom chassis.
2.Remove the two screws Gattaching the lug wire with
main board.
3.The servo control board is removed from the connector
CN961 and CN701 connected with the main board
respectively.
4.Remove the mechanism assembly by lifting the rear part
of the mechanism assembly.

XV-S56BK/XV-S57SL
1-7
Removing the rear panel (see Fig.5)
Removing the front panel assembly
(see Fig.6,7)
Removing the main board (see Fig.7)
*Prior to performing the following procedure, remove
the top cover.
1.Remove the three screws Cand nine screws E
attaching the rear panel on the back of the body.
* Prior to performing the following procedure, remove
the top cover, mechanism assembly, surround audio
board 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.
E
C
EE
Rear panel
Fig.5
F
Hook c
Hook d
Hook d
Front panel
assembly
Fig.6
* 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.
Hook b Hook b
Servo control
board
Fig.4
Removing the servo control board
(see Fig.4)
* Prior to performing the following procedure, remove
the top cover and mechanism assembly.
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-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.
3.Two places in hook bare removed, the servo control
board is lifted, and it is removed.
CN703
CN702
Fig.7
GG
GG

XV-S56BK/XV-S57SL
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-S56BK/XV-S57SL
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-S56BK/XV-S57SL
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-S56BK/XV-S57SL
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-S56BK/XV-S57SL
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-S56BK/XV-S57SL
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-S56BK/XV-S57SL
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-S56BK/XV-S57SL
1-15
Adjustment method
(1) Initialization method
(2) Display of "Laser current value" and "Jitter value"
If microprocessor (IC401,IC402,IC403) 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 key 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)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 4 0 3 9 7 8
FL Display
Laser current value Jitter value
* The test mode is canceled when
the power is turned off.
The laser current value becomes 40mA 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 key to remote control without turning on the disk.
If the laser current value is 64mA or less, it is roughly good. There is a possibility to which pick-up is
deteriorated, and exchange pick-up, please when there are 65mA or more laser current value.
For Laser current value
Remote control "4" key --- Laser of CD
Remote control "5" key --- Laser of DVD
*Returns to a usual test mode by the
thing to push the stop button of
remote control.
3D PHONIC
Button (Initialize start)
POWER Button
DTS Display part
(Initialize complete)
FL Display
OPEN/CLOSE
Button(Test mode)
PLAY Button
(Test mode & display of jitter)
5 Button
(Laser of DVD)
4 Button
(Laser of CD)

XV-S56BK/XV-S57SL
1-16
FL display FL display
Conversion
value(%)
Conversion
value(%)
Jitter value
3818
3828
3838
3848
3858
3868
3878
3888
3898
38A8
38b8
38c8
38d8
38E8
38F8
3918
3928
3938
3948
3958
3968
3978
3988
4.7
4.8
4.9
5.1
5.2
5.3
5.4
5.5
5.7
5.8
5.9
6.0
6.1
6.3
6.4
6.6
6.7
6.9
7.0
7.1
7.2
7.3
7.5
3B18
3B28
3B38
3B48
3B58
3B68
3B78
3B88
3B98
3BA8
3BB8
3BC8
3BD8
3BE8
3BF8
3C18
3C28
3C38
3C48
3C58
3C68
3C78
3C88
10.5
10.6
10.7
10.8
10.9
11.1
11.2
11.3
11.4
11.5
11.7
11.8
11.9
12.0
12.1
12.4
12.5
12.7
12.7
12.9
13.0
13.1
13.2
3998
39A8
39B8
39C8
39D8
39E8
39F8
3A18
3A28
3A38
3A48
3A58
3A68
3A78
3A88
3A98
3AA8
3AB8
3AC8
3AD8
3AE8
3AF8
7.6
7.7
7.8
7.9
8.1
8.2
8.3
8.5
8.7
8.8
8.9
9.0
9.1
9.3
9.4
9.5
9.6
9.7
9.9
10.0
10.1
10.2
3C98
3CA8
3CB8
3CC8
3CD8
3CE8
3CF8
3D18
3D28
3D38
3D48
3D58
3D68
3D78
3D88
3D98
3DA8
3DB8
3DC8
3DD8
3DE8
3DF8
13.3
13.5
13.6
13.7
13.8
13.9
14.1
14.3
14.4
14.5
14.7
14.8
14.9
15.0
15.1
15.3
15.4
15.5
15.6
15.7
15.9
16.0
FL display FL display
Conversion
value(%)
Conversion
value(%)
The jitter value is displayed on the FL display referring to the previous page.
The jitter value is displayed by the hexadecimal number and refer to the conversion table of following,please.
If the indication value is 11% or less, it can be judged by this simple checking method that the signal
read precision of the set is satisfactory.
Please do "Flap adjustment of the pick-up guide shaft" when you replace the pick-up and the spindle
motor when there are 11% or more jitter value.
Before using the TEST disc VT-501, careful check it if there is neither damage nor dirt on the read surface.
For Jitter value
3D PHONIC
Button (Initialize start)
POWER Button
DTS Display part
(Initialize complete)
FL Display
OPEN/CLOSE
Button(Test mode)
PLAY Button
(Test mode & display of jitter)
5 Button
(Laser of DVD)
4 Button
(Laser of CD)

XV-S56BK/XV-S57SL
1-17
Mechanism assembly
Servo control board Hook
Shaft
Mechanism assembly
Stud
Stud
Servo control board
Assistance
board
Assistance
board
Extension
cord
Main board
XV-S40 CONTROL CONNECT
Assistance board
(Connect to servo control board)
Assistance board
(Connect to main board)
Extension
cord
XV-S40
MAIN CONNECT
(3) Flap adjustment of the pick-up guide shaft
<Tool list for adjustment>
Stud (four pieces set)
Parts No. : JIGXVS40
Extension cord set (two cord and two board)
Parts No. : EXTXVS40CB
Hex wrench for adjustment
Off-the-shelf (1.3mm)
Test disc
VT-501 or VT-502
Stud
One is not used though it is one
set which consists of four units.
<Adjustment preparation> (There is a somewhat different part in the photograph and the actual thing.)
<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 And, the board is inclined in the
direction of the arrow on figure as much as possible.
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 minimum 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.

XV-S56BK/XV-S57SL
1-18
FE OFF ON
TE
OFF ON
FE
LO LI
OK !
Y
Y
A
N
N
N
N
Y
Y
N
N
Y
N
Y
Y
A
Y
Y
Y
N
N
N
Two layers of DVD only.
Is the inter-layer jump OK?
(8) Inter-layer
jump error
Has the disc information
been collected?
Stop will result
(7) Address read
error
Is playback
possible?
Troubleshooting
Servo volume
Press OPEN
/CLOSE key
Confirmation of tray drive circuit
and circuit in surrounding
See "(2) Disk detection, distinction error"
in "Check points for individual errors"
Is tray
operation
correct?
Is the traverse moving
along the innermost
perimeter for SW detection?
"NO DISC" message appears
immediately after vertical
movement of the pick-up lens
The state that DISC does not rotate continues for
several seconds, and becomes NO DISC or an
error display afterwards.
The rotation of DISC becomes high-speed and
abnormal, and becomes NO DISC or an error
display afterwards.
Is focus retraction OK?
Even when it retracts
correctly, if it is out of focus
and makes repeated retries
with a clicking sound, it is
in error.
Is tracking retraction OK?
If TE waveform reappears
or fails to converge after the
TE retraction, it is in error.
Is the spindle servo
locked correctly?
Is the RF OUT waveform
locked correctly?
See "(6) Spindle CLV error"
in "Check points for
individual errors"
See "(5) Tracking ON error"
in "Check points for
individual errors"
See "(4) Focus ON error"
in "Check points for
individual errors"
See "(1) Spindle startup error"
in "Check points for individual errors"
See "(3) Traverse movement error"
in "Check points for individual errors"
Check (9),(10),(11), and
(12) items in "Check points
for individual errors"

XV-S56BK/XV-S57SL
1-19
Check points for each error
(1) Spindle start error
1.Defective spindle motor
*Are there several ohms resistance between each pin of CN201 "5-6","6-7","5-7"?
(The power supply is turned off and measured.)
*Is the sign wave of about 100mVp-p in the voltage had from each terminal?
[ CN201"9"(H1-),"10"(H1+),"11"(H2-),"12"(H2+),"13"(H3-),"14"(H3+) ]
2.Defective spindle motor driver (IC251)
*Has motor drive voltage of a sine wave or a rectangular wave gone out to each terminal(SM1~3)
of CN201"5,6,7" and IC251"2,4,7"?
*Is FG pulse output from the terminal of IC251"24"(FG) according to the rotation of the motor?
*Is it "L(about 0.9V)" while terminal of IC251"15"(VH) is rotating the motor?
3.Has the control signal come from servo IC or the microcomputer?
*Is it "L" while the terminal of IC251"18"(SBRK) is operating?
Is it "H" while the terminal of IC251"23"(/SPMUTE) is operating?
*Is the control signal input to the terminal of IC251"22"(EC)?
(changes from VHALF voltage while the motor is working.)
*Is the VHALF voltage input to the terminal of IC251"21"(ECR)?
4.Is the FG signal input to the servo IC?
*Is FG pulse input to the terminal of IC201"53"(FG) according to the rotation of the motor?
* Laser is defective.
* Front End Processor is defective (IC101).
* APC circuit is defective. --- Q101,Q102.
* Pattern is defective. --- Lines for CN101 - All patterns which relate to pick-up and patterns between IC101
* Servo IC is defective (IC201).
* IC101 --- For signal from IC101 to IC201, is signal output from IC101 "20" (ASOUT) and
IC101 "41"(RFENV) and IC101 "22" (FEOUT)?
(2) Disc Detection, Distinction error (no disc, no RFENV)

XV-S56BK/XV-S57SL
1-20
(4) Focus ON NG
* Is FE output ? --- Pattern, IC101
* Is FODRV signal sent ? (R279) --- Pattern, IC201 "5"
* Is driving voltage sent ?
IC271 "13", "14" --- If NG, pattern, driver, mechanical unit .
* Mechanical unit is defective.
(5) Tracking ON NG
* When the tracking loop cannot be drawn in, TE shape of waves does not settle.
* Mechanical unit is defective.
Because the self adjustment cannot be normally adjusted, the thing which cannot be normally
drawn in is thought.
* Periphery of driver (IC271)
Constant or IC it self is defective.
* Servo IC (IC201)
When improperly adjusted due to defective IC.
(6) Spindle CLV NG
* IC101 -- "35"(RF OUT), "30"(ARF-), "31(ARF+).
* Does not the input or the output of driver's spindle signal do the grip?
* Has the tracking been turned on?
* Spindle motor and driver is defective.
* Additionally, "IC101 and IC201" and "Mechanism is defective(jitter)", etc. are thought.
* Besides, the undermentioned cause is thought though specific of the cause is difficult because various
factors are thought.
Mechanism is defective. (jitter)
IC201, IC301, IC401.
The disc is dirty or the wound has adhered.
(7) Address read NG
(8) Between layers jump NG (double-layer disc only)
Mechanism defective
Defect of driver's IC(IC271)
Defect of servo control IC(IC201)
(3) Traverse movement NG
1.Defective traverse driver
*Has the voltage come between terminal of CN101 "1" and "2" ?
2.Defective BTL driver (IC271)
*Has the motor drive voltage gone out to IC271"17" or "18"?
3.Has the control signal come from servo IC or the microcomputer?
*Is it "H" while the terminal of IC271"9"(STBY1) ?
*TRSDRV Is the signal input? (IC201 "51")
4.TRVSW is the signal input from microcomputer? (IC401 "50")