JVC XVNA-70-BK, XVNA-77-SL Service manual
XA011200310
SERVICE MANUAL
DVD AUDIO/VIDEO PLAYER
XV-NA70BK,XV-NA77SL
Area Suffix (XV-NA70BK)
J -------------------------- U.S.A.
C --------------------- Canada
Area Suffix (XV-NA77SL)
J -------------------------- U.S.A.
C --------------------- Canada
B -------------------------- U.K.
E ------ Continental Europe
EN ------- Northern Europe
EV --------- Eastern Europe
TV DVD
STANDBY/ON
OPEN/
TV DVD
CLOSE
TV1 TV2 TV3
2
1
TV4 TV5 TV6
5
4
TV7 TV8 TV9
8
7
TV-/-- TV0 MUTING
010 +10
TITLE/
GROUP
U
N
E
CH
M
+
P
O
T
VOL VOL+
ENTER
C
CH
H
O
I
C
E
SELECTCLEAR
SLOW
-
3D
PHONIC
SUB TITLE
ANGLE
AUDIO
fs/Rate
REPEAT
DIMMER
3
6
9
TV/VIDEO
CANCELRETURN PAGE
M
C
S
N
O
NEXTPREVIOUS
SLOW+
VFPZOOM
PROGRESSIVE
SCAN
AMP
VOL
E
N
U
N
E
E
R
EE ---- Russian Federation
A -------------------- Australia
UF ---------------------- China
UJ ------------- U.S.A.Militaly
US ---------------- Singapore
UW ----- Brazil,Mexico,Peru
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.XA011
2003/10
SPECIFICATION
For U.S.A.
General Readable discs DVD AUDIO, DVD VIDEO, DVD-R (Video format), DVD-RW (Video format/VR
format), DVD-RAM (VR format), SVCD, Video CD, Audio CD (CD-DA), MP3/WMA
format, JPEG, CD-R/RW (CD-DA, SVCD, Video CD, MP3/WMA format, JPEG)
Video format REMOTE, 480i (Interlaced scan)/480p (Progressive scan) selectable
Other Power requirements AC 120 V ~ , 60 Hz
Power consumption 16 W (POWER ON), 2.0 W (STANDBY mode)
Mass 2.1 kg (4.7 lbs)
Dimensions (W × H × D) 435 mm × 45 mm × 270.5 mm
(17-3/16 inch × 2-13/16 inch × 10-11/16 inch)
Video outputs COMPONENT (pin jacks) Y Output: 1.0 Vp-p (75 Ω)
PB/PR Output: 0.7 Vp-p (75 Ω)
VIDEO OUT (pin jack) 1.0 Vp-p (75 Ω)
S-VIDEO OUT (S jack) Y Output: 1.0 Vp-p (75 Ω)
C Output: 286 mVp-p (75 Ω)
Horizontal resolution 500 lines or more
Audio outputs ANALOG OUT (pin jack) 2.0 Vrms (10 kΩ)
DIGITAL OUT (COAXIAL) 0.5 Vp-p (75 Ω termination)
DIGITAL OUT (OPTICAL) -21 dBm to -15 dBm (peak)
Audio characteristics Frequency response CD (sampling frequency 44.1 kHz):2 Hz to 20 kHz
DVD (sampling frequency 48 kHz):2 Hz to 22 kHz(4 Hz to 20 kHz for DTS and
Dolby Digital bitstream signals)
DVD (sampling frequency 96 kHz):2 Hz to 44 kHz
DVD (sampling frequency 192 kHz/176.4kHz):2 Hz to 88 kHz
Dynamic range 16 bit: More than 100 dB
20 bit/24 bit: More than 110 dB
Wow and flutter Unmeasurable (less than ± 0.002%)
Total harmonic distortion 16 bit: less than 0.0018%
20 bit/24 bit: less than 0.0012%
• Specificati ons and appearance are subject to change without prior notice.
• Manufactured under license from Dolby Laboratories. "Dolby," "MLP Lossless" and the double-D symbol are trademarks of Dolby
Laboratories.
• "DTS" and "DTS Digital Surround" are registered trademarks of Digital Theater Systems, Inc.
1-2 (No.XA011)
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of th is 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 dire ctly 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, 1,000Ω per volt or more sensitivity
in the following manner. Connect a 1,500Ω 10W resistor
paralleled by a 0.15µF 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.).
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
0.15 F AC TYPE
Place this
probe on
1500 10W
Good earth ground
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal resp onsibility 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 compone nts are replaced
by approved parts.
(5) If mains voltage selector is provided, check setting for local
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.
(This regulation dose not Except the J and C version)
each exposed
metal part.
(No.XA011)1-3
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 sh eet) 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.
(caption)
Anti-static wrist strap
1M
Conductive material
(conductive sheet) or iron palate
(3) Handling the optical pickup
• In order to maintain quality during transpo rt and before install ation, 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.
1-4 (No.XA011)
1.7 Importance administering point on the safety
B114
B204
CN861
B141
EP951
B702
B132
C981
R951
C980
RA1
B801
CN862
RA2
B306
B119
B106
B205
EP954
B110
C904
C905
P901
B407
FC901
FC902
C902
B701
B137
B506
B802
B210
C918
B401
Q951
B108
B111
L953
C963
C907
R901
C908
R910
D901
L901
D851
B213
X851
B112
B207
R904
R902
B402
D903
IC901
C913
R912
C914
R905
R906
R907
R903
D904
R915
PC901
B503
B113
B501
B214
C853
B301
B202
C861
D852
R854
B304
B121
C850
B105
B308
B505
B116
B115
B203
B107
B109
Q852
B303
B302
D956
C964
D957
D954
C967
B405
T901
C906
C950
C951
B221
B208
B206
B404
B403
D952
D951
R954
CP951
C955
C953
D960
B406
IC904
CN901
B305
D905
B504
B310
B309
B311
B120
B602
B502
EP953
B104
L954
L955
D955
C958
D953
CN902
B209
B122
CN651
B603
L952
C952
L951
B507
C959
C988
R664
C684
C683
B123
C680
C678
B129
B128 B127
B131
B601
CN904
J851
L851
C965
L852
C966
B312
R662 R663
B211
Q612
R665
C691
C693 C695
B130
B135
B138
C672
C674
C676
B126
S601
B125
CN903
S901
B134
B133
B313
B201
B307
J603
B140
Q611
C670
R691
R693
R692
C681
B212
R694
R658
B124
B139
R679
R680
R655
J601
B136
EP952
Full Fuse Replacement Marking
Graphic symbol mark
(This symbol means fast blow type fuse.)
should be read as follows ;
FUSE CAUTION
FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ONLY WITH SAME TYPE
AND RATING OF FUSES ;
F901 : 1.6 A / 125 V F901 : 1.6 A / 125 V
Marquage Pour Le Remplacement
Complet De Fusible
Le symbole graphique (Ce symbole signifie
fusible de type a fusion rapide.)
doit etre interprete comme suit ;
PRECAUTIONS SUR LES FUSIBLES
POUR UNE PROTECTION CONTINUE CONTRE
DES RISQUES D'INCENDIE, REMPLACER
SEULEMENT PAR UN FUSIBLE DU MEME TYPE ;
(No.XA011)1-5
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.
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.
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
REPRODUCTION AND POSITION OF LABEL and PRINT
WARNING LABEL and PRINT
ADVARSEL: Usynlig laser-
stråling ved åbning, når
sikkerhedsafbrydere er ude
af funktion. Undgå udsættelse for stråling (d)
laserl
ADVARSEL: Us
ä
r
str
åling ved åbning, n
sikkerhedsa
ynlig
laser-
af funktion. Undgå
fbrydere er ude
telse for stråling
VARO: Avattaessa
å
r
jalukitus ohitettaessa
ud
sæt-
alttiina näkymätt
ja suo-
(d)
lasersäteilylle. Ä
säteeseen. (f)
olet
ömälle
lä
katso
The inside of a chassis base
CAUTION: Invisible laser
radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE
TO BEAM. (e)
VARNING: Osynlig laserstrålning när denna del är
öppnad och spärren är
urkopplad. Betrakta ej
strålen. (s)
CAUTION:
radiatio
Invisible laser
n when open and
interlock failed or defeated.
AVOID DIRECT EXPOSUR
TO BEAM. (e)
E
strålen. (s)
VARNING:
str
ålning när denna de
Osynlig
öppnad och sp
urkoppla
d. Betrakta ej
ärren är
VARO: Avattaessa ja suojalukitus ohitettaessa olet
alttiina näkymättömälle
lasersäteilylle. Älä katso
säteeseen. (f)
1-6 (No.XA011)
1.9 Precautions for Service
1.9.1 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.
1.9.2 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 periphera l 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) Please be sure to make the switch of a relay board into the "SHORT" side before drawing out a wire from the connector CN101
on a servo control board,
when taking out a mechanism assembly from a main body.
And please be sure to make a switch into the "OPEN" side after connecting a wire to CN101, when it mounts a mechanism as-
sembly in a main body.
(4) After removing the flexible wire from the connector (CN1
(5) 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.
), short-circuit the flexible wire by the metal clip.
The procedure for protecting a pickup
The switch on a relay board is
changed from "OPEN" to "SHORT."
Short circuit
A wire is extracted from the
connector CN101 on a servo control
board.
It solders to the short circuit part on a
flexible wire, and it is made to shortcircuit.
A flexible wire is extracted from the
connector CN1 on a relay board.
In case you assemble, please do all work conversely.
Short circuit
CN1
Relay board
(No.XA011)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-8 (No.XA011)
SECTION 3
TOP COVER
Push
DISASSEMBLY
There is a part different from the photograph according to the model and the destination thought explains this disassembly method by
using XV-NA77SL for europe.
3.1 Main body section
3.1.1 Removing the top cover (See Fig ure 1)
(1) Remove the two screws A attaching the top cover on both
sides of the main body.
(2) Remove the three screws B attaching the top cover on the
back of the main body.
(3) Raise the both sides and lower part of the rear of the top
cover, with opening them slightly in an outward direction.
And the top cover will be removed.
3.1.2 Removing the front panel assembly (See Figure 2, Figure 3, Figure 4)
• Prior to perfo rming the following procedure, remove the top
cover.
• There is no need to remove the mechanism assembly.
(1) Insert a kind of screwdriver in a hole located in the righ t
side of mechanism assembly, and push a lever until it cannot be inserted any further.
(2) And then, a tray will come out. Remove the tray in an upper
direction, with slightly opening the lower part of fitting in an
outward direction.
(3) Disconnect the card wire from connector CN861
on the power supply board.
(4) Hook a and b are removed respectively, and the front panel
assembly is removed.
, CN862
A x 2
Front panel assembly
TOP COVER
TOP COVER
B
Fig.1
B
B
CN861CN862
Fitting
Front panel assembly
Mechanism assembly
Tray
Push
Hole and lever
Fig.2
Front panel
assembly
Hook a
Power supply board
Fig.3
Hook a
Hook b
Hook b
Hook b
Fig.4
(No.XA011)1-9
3.1.3 Removing the mechanism assembly (See F igure 2, Figure 5, Figure 6)
OPENSHORT
• Prior to performing the followi ng procedure, remove the top
cover.
• There is no need to remove the front panel assembly.
(1) Insert a kind of screwdriver in a hole located in the right
side of mechanism assembly, and push a lever until it cannot be inserted any further. (See Figure 2)
(2) And then, a tray will come out. Remove the tray in an upper
direction, with slightly opening the lower part of fitting in an
outward direction. (See Figure 2)
(3) Remove the three screws C attaching the mechanism as-
sembly.
(4) The switch on a relay board is made into the “SHORT” side.
(5) Disconnect the card wire from connector CN101
on the
servo control and signal output terminal board.
(6) Remove the mechanism assembly by lifting the rear part of
the mechanism assembly.
ATTENTION:
Servo control and signal
output terminal board
Please be sure to make the switch on a relay board into a
“SHORT” side before disconnect a card wire from the connector CN101
on servo control and signal output terminal board.
Moreover, please be sure to make a switch into the “OPEN”
side after inserting a card wire in a connector CN101
at the
time of an assembly.
There is a possiblity of destroying the laser diode of a pick-up
unit with static electricity.
Mechanism assembly
C
CN101
Fig.5
Mechanism assemblySwitch
C
C
3.1.4 Removing the relay board (See Figure 7)
• Prior to performing the following procedure, remove the mechanism assembly.
(1) Remove the four screws D attaching the relay board.
(2) Disconnect the card wire from connector CN2
, CN3 on the
relay board respectively.
(3) Disconnect the flexible wire from connector CN1
on the re-
lay board from pick-up unit.
ATTENTION:
At this time, please extract the wire after short-circuited
of two places on the wire in part c with solder. Please remove the solder two places of part c after connecting the
wire with CN1
when reassembling.
There is a possibility of destroying the laser diode of a
pick-up unit with static electricity.
CN2
CN3
CN1
SHORT OPEN
D
OPEN
Relay board
Fig.6
Part c
D
1-10 (No.XA011)
Relay board
DD
Fig.7
3.1.5 Removin g the rear panel (See Figure 8, Figure 9)
• Prior to perfo rming the following procedure, remove the top
cover.
(1) Remove the eleven screws E attaching the rear panel.
(2) Disconnect the power cord from connector P901
power supply board
(3) Remove tie band.
on the
Rear panel
E
E
Fig.8
E
F FCN101
CN601 CN901,CN902
Servo control and signal
output terminal board
3.1.6 Removin g the servo control and signal output terminal board. (See Figure 9)
• Prior to perfo rming the following procedure, remove the top
cover/rear panel.
(1) Remove the two screws F attaching the servo control and
signal output terminal board.
(2) Disconnect the card wire from connector CN101
CN601 on the servo control and signal output terminal
board.
(3) Disconnect the flat wire from connector CN901
CN903 on the power supply board.
, CN501,
, CN902,
CN501
G CN861CN862
G
CN904
Fig.9
G
P901
CN903
CN651
Power supply board
3.1.7 Removing the power supply board. (See Figure 9)
• Prior to perfo rming the following procedure, remove the top
cover/rear panel.
(1) Remove the three screws G attaching the power supply
board.
(2) Disconnect the wire from connector CN901
, CN904, CN651, CN861, CN862 on the power sup-
CN903
ply board.
(3) Disconnect the socket wire from socket P901 on the power
supply board.
, CN902,
(No.XA011)1-11
3.2 Loading mechanism assembly
3.2.1 Removing the tray (See Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6)
(1) Push a of the slide ca m on the ho le in the right side of the
loading base by using a driver until it stops. (See Figure 1.)
(2) The tray comes out. Pull the tray in a front direction until it
stops.
(3) Remove the two screws A attaching the slide bracket. (See
Figure 2.)
(4) Tilt the tray in a directi on of the arrow around the point in
the left rear part of the tray. (See Figure 3.)
(5) The rail of the tray is removed from b of the loading base.
Then, remove the tray upward. (See Figure 4.)
Attaching the tray:
Engage c of the loading base to the projection of the tray while
tilting the tray to the left. Turn the tray in a direction of the arrow, and attach the slide bracket. (See Figure 5.)
Note:
Prior to the procedure above, move the slide cam in a direction
of the arrow so that d of the slide cam can be inserted in e of
the tray. (See Figure 6.)
Tray
The point in the left rear part
Tray
Fig.3
Push
Slide cam part a
Slide bracket
A
Fig.1
Fig.2
A
Loading base
Tray
Loading base part b
Rail of the tray
Fig.4
Projection of the tray
Loading base part c
Fig.5
Par t e
1-12 (No.XA011)
Par t d
Slide cam
Fig.6
3.2.2 Removing the traverse mech anism assembly (See Figure 7)
Shaft
Reverse the loading mechanism assembly. Remove the four
screws B attaching the traverse mechanism assembly. Remove
the traverse mechanism assembly upward.
Loading mechanism
B
assembly
B
3.2.3 Removing the elevator (See Figure 8 and Figure 9)
• Prior to the following proced ure, remove the traverse mechanism assembly.
(1) Remove the two arms of the el evator from the two parts f
by moving the arms in a direction of the arrow.
(2) Pull out the elevator in a rear direction.
Attaching the elevator:
Engage the two holes g to the two shafts on the front part of
the elevator. And then, attach the elevator.
Elevator
B
Elevator
Traverse mechanism
assembly
Fig.7
g
Shaft
Shaft
Fig.9
B
Slide cam
g
Par t f
Par t f
Fig.8
(No.XA011)1-13
3.2.4 Removing the loading mo tor (See Figure 10 and Figure 11)
• Prior to the following procedu re, remove the tray, the traverse
mechanism assembly, and the elevator.
(1) Remove the belt from the pulley.
(2) Remove two screws C attaching the loading motor.
(3) Remove two solders h on the switch board.
Pulley
Belt
㧯
Fig.10
Loading base
Pulley
㧯
Slide cam
Switch board
Loading motor
Part h
Fig.11
1-14 (No.XA011)
3.3 Traverse mechanism assembly
3.3.1 Removin g the pickup (See Figure 12, Figure 13, and Fig ure 14)
• Prior to the following proced ure, remove the traverse mechanism assembly.
(1) Remove one screw D attaching the plate.
(2) Remove the plate and the leaf spring.
(3) Lift i of the shaft 1, and pull out the shaft 1 from j.
(4) Remove k of the pickup from the shaft 2.
Attaching the pickup:
(1) Engage k of the pickup to the shaft 2.
Note:
As Figure 14 shows, the spring must come under the
shaft 2.
(2) Insert the shaft 1 in j, and attach the shaft 1 to i.
(3) Attach the leaf sp ring, and then atta ch the plate. Fi x the
leaf spring and the plate by using the screw D.
Pick-up
Plate
D
Leaf spring
Fig.12
Par t j
Shaft 1
Par t k
Par t i
Shaft 2
Fig.13
Spring
Shaft 2
Fig.14
(No.XA011)1-15
SECTION 4
ADJUSTMENT
4.1 Test mode setting method
(1) Unplug the power plug.
(2) Insert power plug into outlet while pressing both "PLAY" key and "STOP" key of the main body.
(3) The FL display shows "∗0", and the main body turns to test mode. "∗" means the destination, and "0" means parameter adjust-
ment status.
(4) To release test mode, press "POWER" key of the main body.
NOTE:
Each pressing of "CHOICE" key of the remote controller in test mode changes the mode as follows.
0 --------------------------------------
_ _ ---------------------
---------------------
Becames test mode
Version of firmware
Device key index
FL Display becames all lighting
CHECK ---------------------------------
EXPERT -------------------------------
4.2 Method of displaying version of firmware
(1) Set the main body at test mode.
(2) Press "CHOICE" key of the remote controller once. Then, versio n number and alphabe tical letter of the system controller and
the back end are displayed in the FL display as follows:
Check mode
Not used
FL Display (Example)
System controller
15_02_5F
4.3 Initialization method
Please initialize according to the following procedures in the following case:
• Just after you upgrade the firmware.
• After you confirm the symptoms that a customer points out. First Initialize, and then confirm whether the symptoms are improved or
not.
• After servicing, befo re returning the main body to a customer. (Initialized main body should be returned to a customer.)
(1) Set the main body at test mode.
(2) Press "PAUSE" key of the main body.
(3) When initialization is completed, the FL display changes from "∗0" to "∗00".
(The left "0" of "00" is not always "0". It shows parameter adjustment status.)
Back end
OPEN/
CLOSE
TV1 TV2 TV3
2
1
TV4 TV5 TV6
5
4
TV7 TV8 TV9
8
7
TV-/-- TV0 MUTING
010 +10
U
N
E
CH
M
+
P
O
T
VOL VO L+
ENTER
C
CH
H
O
I
C
E
SELECTCLEAR
-
SLOW
3D
PHONIC
SUB TITLE
ANGLE
REPEAT
1-16 (No.XA011)
GROUP
AUDIO
fs/Rate
DIMMER
STANDBY/ON
TV DVD
TITLE/
TV DVD
TV/VIDEO
CANCELRETURN PAGE
N
O
NEXTPREVIOUS
SLOW+
PROGRESSIVE
3
6
9
M
E
N
U
N
E
E
R
C
S
VFPZOOM
SCAN
AMP
VOL
CHOICE key
(switch of mode)
POWER key
PLAY key
(for test mode)
STOP key
(for test mode)
FL Display
PAUSE key
(for initialize)
4.4 All-initialization method
Please perform all-initialization according to the following procedures in the following case:
• Just after you exchange the pick-up.
• Just after you exchange the spindle motor.
• Just after you exchange the traverse mechanism base.
NOTE:
Please perform all-initialization when you exchange the parts above and also when you remove the parts above.
• Just after the flap adjustment of the pick-up guide shaft
(1) Set the main body at test mode.
(2) Press and hold "BACKWARD SKIP" key of the main body for more than 2 seconds.
(3) When all-initialization is completed, the FL display changes from "∗0" to "∗33".
NOTE:
After all-initialization, be sure to perform optimization adjustment of Front End parameter.
4.5 Optimizat ion adjustment of Front End parameter
Adjustment to optimize Front End parameter must be performed in each mechanism assembly of this model for high-speed starting.
Please perform optimization according to the following procedures just after all-initialization is completed and when FL display shows
anything except "∗0" (For example when FL display shows "∗1", "∗2", and "∗3") at test mode.
(1) Press "POWER" key of the main body to turn the main body on (not to set the main body at test mode).
(2) Insert the test disc VT-501 or commercial dual-layer DVD software.
(3) Remove the disc when the FL display changes from "READING" to disc information.
(4) Perform the same procedures as in (2) and (3) above by using the test disc CTS-1000 or commercial CD-DA softw are.
(5) Set the main body at test mode, and check that the FL display shows "∗0".
NOTE:
Status of this adjustment can be judged by the number displayed at test mode as follows:
DVD adjustment CD adjustment FL display at test mode
Adjusted Adjusted ∗0
Not adjusted Adjusted ∗1
Adjusted Not adjusted ∗2
Not adjusted Not adjusted ∗3
NOTE:
As for a disc used for adjustment,
• Disc should be mounted. ("Mounting" means to display "READING" after the disc is inserted and then display the disc information.) Disc need not be played.
• If you do not have test disc either VT-501 (DVD) or CTS-1 000 (CD-DA), use a commercial disc (for DVD, dual-layer software) after seeing and checking that the disc is neither curved nor foreseen that it may shake at the time of playback.
If you use a disc with bad features, starting time may be slow or disc may not be read.
TV DVD
STANDBY/ON
OPEN/
TV DVD
CLOSE
TV1 TV2 TV3
2
1
3
TV4 TV5 TV6
5
4
TV7 TV8 TV9
8
7
TV-/-- TV0 MUTING
010 +10
TITLE/
GROUP
U
N
E
CH
M
+
P
O
T
VOL VO L+
ENTER
C
CH
H
O
I
C
E
SELECTCLEAR
-
SLOW
3D
PHONIC
SUB TITLE
ANGLE
AUDIO
fs/Rate
REPEAT
DIMMER
TV/VIDEO
CANCELRETURN PAGE
S
N
O
NEXTPREVIOUS
SLOW+
PROGRESSIVE
SCAN
AMP
6
9
M
E
N
U
N
E
E
R
C
VFPZOOM
VOL
POWER key
FL Display
STOP key
(for test mode)
BACKWARD SKIP key
(for all-initialize : It pushes 2 seconds or more.)
PLAY key
(for test mode)
(No.XA011)1-17
4.6 Display of current value of laser
(1) Set the main body at test mode.
(2) Press "CHOICE" key of the remote controller four times. Then, FL display is displayed "CHECK".
(3) The laser current value can be switched between th e value of CD and that of DVD by pressing the following key of the re mote
controller.
FL Display (Example)
00002530
The number shown in the FL display shows mA of current value of laser.
The first two numbers ("25" in "2530") shows current value of laser at the time of adjustment after the latest all-initialization, 25mA
in this example.
The last two numbers ("30" in "2530") shows the present current value of laser, 30mA in this example.
The first two numbers ("25" in "2530") usually shows current value of laser at the time of shipment, so you can see how the product has been deteriorated by comparing the first two numbers ("25" in "2530") and the last two numbers ("30" in "2530").
CD:
The laser current value of 49 mA or less is normal.
The laser current value of over 50 mA is not normal. Laser diode of the pickup has been deteriorated.
DVD:
The laser current value of 64 mA or less is normal.
The laser current value of over 65 mA is not normal. Laser diode of the pickup has been deteriorated.
To return to test mode, press "STOP" key of the main body.
Remote controller "4" key --- Laser of CD
Remote controller "5" key --- Laser of DVD
4.7 Flap adjustment of the pick-up guide sh aft
Please perform flap adjustment of the pick-up guide shaft in the following case:
• Just after you exchange the pick-up.
• Just after you exchange the spindle motor.
• Just after you exchange the traverse mechanism base.
NOTE:
Please perform flap adjustment of the pick-up guide shaft when you exchange the parts above and also when you remove the
parts above.
• When the reading accuracy of the signal is bad (There is a block noise in the screen, Scree n stops i n the outer circumference of a
disc, etc.)
1 key (automatic adjustment)
5 key (laser of DVD)
TV DVD
STANDBY/ON
OPEN/
TV DVD
CLOSE
TV1 TV2 TV3
2
1
3
TV4 TV5 TV6
5
4
6
TV7 TV8 TV9
8
7
TV-/-- TV0 MUTING
010 +10
TITLE/
GROUP
U
N
E
CH
M
+
P
O
T
VOL VO L+
ENTER
C
CH
H
O
I
C
E
SELECTCLEAR
SLOW
-
3D
PHONIC
SUB TITLE
ANGLE
AUDIO
fs/Rate
REPEAT
DIMMER
6 key
9
(display of jitter value)
TV/VIDEO
CANCELRETURN PAGE
M
E
N
U
4 key (laser of CD)
N
E
E
R
C
S
N
O
NEXTPREVIOUS
SLOW+
VFPZOOM
CHOICE key
PROGRESSIVE
SCAN
(switch of mode)
AMP
VOL
POWER key
STOP key
(for test mode)
FL Display
PLAY key
(for test mode)
1-18 (No.XA011)
4.7.1 Tool for adjustment
OPEN SHORT
*Stud: One set (four studs), Part number: JIGXVS40 (Note: One of the four studs is not used here.)
4.7.2 Preparation for adjustment
(1) See the disassembly procedure , and remove the Mechanism assembly from the main body.
(2) Remove the relay board attached to the mech anism assembly.
(If you disconnect the wires connected to the Relay board, connect them again.)
(3) Attach the three studs to the Mechanism asse mbly.
(4) Put the Mechanism assembly in the center of the main body, and connect the 50 pin wire from the connector CN4
Relay board to the connector CN101
on the Servo control & signal output terminal board.
on the
Stud
Stud
Mechanism
assembly
Mechanism assembly
CN4
CN101
Relay board
Stud
OPEN SHORT
OPEN SHORT
CN4
Switch
Relay board
Servo control &
signal output
terminal board
4.7.3 Adjustment
(1) Set the unit to test mode.
(2) Press the "CHOICE" key of the remote controller four times, and the FL display is displayed "CHECK".
(3) Insert a test disc (VT-501), and press the numeric key "1" of the remote controller for automatic adjustment.
(4) After a few seconds, press the numeric key "6" of the remote controller. Then, the FL display displays a jitter value.
(5) Turn the adjustment screws on the underside of the traverse mechanism with phillips screw driver until the maximum jitter value
is displayed on the FL display. (In this model, a bigger jitter value means a better result.)
FL Display (Example)
Jitter value
0 8 1 0 _ 3 6 3 3
NOTE:
During operation, the switch on the Relay board should be switched to "OPEN".
Reference values to judge whether the jitter is allowable or not are displayed, instead of actual jitter values.
POINT:
Screw a
Screw b
Turn the adjustment screws a and b to the same angle in the
right direction. And turn the adjustment screws a and b to the
same angle in the left direction. Then, turn the screws a and b
in either the right or the left direction to increase the number of
jitter. Don't turn the adjustment screw c.
Screw c
(No.XA011)1-19
4.8 Upgrading of firmware
A
The latest firmware for upgrading is updated in "Optical disc CSG" page in JS-net.
At the time of service, compare the version of the product and the latest version, and upgrade the old version into the latest version.
(1) Press "POWER" key of the main body to turn the main body on
(2) Insert the upgrade disc.
(3) When FL display of the main body changes from "READING" to "UPGRADE", press "cursor UP" key () of the remote controller.
(4) The entire screen becomes blue, and upgrading starts.
(5) The tray opens automatically. Remove the upgrade disc.
(6) The screen returns to the normal screen. Then, press "POWER" key of th e main body. When the stan d-by indicator is lighted,
upgrading is completed.
(7) Set the main body at test mode, and perfo rm initialization. Then, confirm the version of the firmware.
Firmware upgrade Disc ... press UP
fter inserting the up-grade disc
TV DVD
STANDBY/ON
OPEN/
TV DVD
CLOSE
TV1 TV2 TV3
1
TV4 TV5 TV6
4
TV7 TV8 TV9
7
TV-/-- TV0 MUTING
U
N
E
CH
M
+
P
O
T
VOL VO L+
ENTER
C
CH
H
O
I
C
E
-
SLOW
3D
PHONIC
SUB TITLE
ANGLE
REPEAT
UP key
2
3
(for firmware upgrade)
5
6
8
9
010 +10
TITLE/
TV/VIDEO
GROUP
CANCELRETURN PAGE
M
E
N
U
N
E
E
R
C
S
N
O
NEXTPREVIOUS
SELECTCLEAR
SLOW+
VFPZOOM
CHOICE key
PROGRESSIVE
SCAN
AUDIO
(switch of mode)
fs/Rate
AMP
VOL
DIMMER
POWER key
Upgrade application initializing...
While upgrading (blue screen)
OPEN/CLOSE key
FL Display
NO DISC
When up-grade is completed
PLAY key
(for test mode)
STOP key
(for test mode)
PAUSE key
(for initialize)
1-20 (No.XA011)
4.9 Attention when pick-up is exchanged
(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 instal led 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.
ATTENTION:
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.
(5) The pick-up is installed in the traverse mechani sm.
(6) A flexible wire is conne cted with connector CN101
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 re-
moved.
on the
Switch actuator
Lead spring
Pick-up spring
Flexible wire
Electrostatic breakdown
protection circuit
Pick-up
Flexible wire
Connector
Short land
part "a"
ATTENTION :
Please remove solder in two places in part "a" after
connecting a flexible wire with connector CN1 on the
relayl 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.
Cutting part
Electrostatic breakdown
protection circuit
Short land
part "a"
CN1
Relay board
(No.XA011)1-21
4.10 Confirm method of operation Please confirm the operation of the undermentioned item after doing the repair and the upgrade of the firmware.
Initialize Refer to the initialization method.
All-initialize Refer to the All-initialization method.
Parameter adjustment status Set the main body at test mode, and check that the FL display shows "∗0".
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.
1-22 (No.XA011)
5.1 Servo volume
Press OPEN
/CLOSE key
SECTION 5
TROUBLESHOOTING
Is tray
operation
Confirmation of tray drive circuit
N
and circuit in surrounding
correct?
Y
Is the traverse moving
along the innermost
N
perimeter for SW detection?
Y
"NO DISC" message appears
Y
immediately after vertical
movement of the pick-up lens
N
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.
N
Is focus retraction OK?
FE
OFF
Even when it retracts
correctly, if it is out of focus
and makes repeated retries
with a clicking sound, it is
in error.
ON
See "(4) Focus ON error"
N
in "Check points for
individual errors"
Y
Is tracking retraction OK?
See "(3) Traverse movement error"
in "Check points for individual errors"
See "(2) Disk detection, distinction error"
in "Check points for individual errors"
Y
See "(1) Spindle startup error"
in "Check points for individual errors"
Is the inter-layer jump OK?
FE
LO LI
A
Two layers of DVD only.
N
(8) Inter-layer
jump error
Y
TE
OFF
If TE waveform reappears
or fails to converge after the
TE retraction, it is in error.
ON
Y
Is the spindle servo
locked correctly?
Is the RF OUT waveform
locked correctly?
Y
A
See "(5) Tracking ON error"
N
in "Check points for
individual errors"
See "(6) Spindle CLV error"
N
in "Check points for
individual errors"
Fig.1
Has the disc information
been collected?
Stop will result
Y
Is playback
N
possible?
Y
OK !
N
(7) Address read
error
Check (9),(10),(11), and
(12) items in "Check points
for individual errors"
(No.XA011)1-23
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