• "DVD Logo" is a trademark of DVD Format/Logo Licensing Corporation registered in the US, Japan and other countries.
• Microsoft and Windows Media are either registered trademarks or trademarks of Microsoft Corporation in the United States and/
or other countries.
• Manufactured under license from Dolby Laboratories. Dolby and the double-D symbol are trademarks of Dolby Laboratories.
• "DTS" and "DTS 2.0 + Digital Out" are registered trademarks of Digital Theater Systems, Inc.
• iPod is a trademark of Apple Computer, inc., registered in the U.S. and other countries.
• "SIRIUS" and the SIRIUS dog logo are registered trademarks of SIRIUS Satellite Radio Inc.
• XM and its corresponding logos are registered trademarks of XM Satellite Radio Inc.
• "SAT Radio," the SAT Radio logo and all related marks are trademarks of SIRIUS Satellite Radio Inc., and XM Satellite Radio, Inc.
• Design and specifi cations are subject to change without notice.
1-6 (No.MA248)
1.1Safety Precautions
SECTION 1
PRECAUTIONS
!
!
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.
Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.
(No.MA248)1-7
1.2Preventing 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.
1.2.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(caption)
Anti-static wrist strap
1M
Conductive material
(conductive sheet) or iron plate
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
1.3Handling 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.
1.4Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the DVD pickup unit.
• Apply solder to the short land before the flexible wire is disconnected from the connector on the DVD pickup unit.
(If the flexible wire is disconnected without applying solder, the DVD pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land after connecting the flexible wire.
Flexible wire
1-8 (No.MA248)
CN101
Short-circuit points
Mechanism control board
1.5Important 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 CD,MD and DVD 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 defeated. 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 here in 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 LABELS
WARNING LABEL
CAUTION : Visible and Invisible
CLASS 1
LASER PRODUCT
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
(No.MA248)1-9
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-10 (No.MA248)
SECTION 3
DISASSEMBLY
3.1Main body section
3.1.1 Removing the front panel assembly
(See Fig.1)
Push the detach button in the lower left part of the front panel assembly and remove the front panel assembly.
3.1.2 Removing the bottom cover
(See Fig.1)
Reference:
Remove the front panel assembly as required.
(1) Release the two joints a, two joints b and joint c.
(2) Remove the bottom cover from the main body.
Caution:
Do not damage the main board when releasing the joints using
a screwdriver or a similar tool.
Front panel assembly
Detach button
Fig.1
b
Bottom cover
a
3.1.3 Removing the front chassis assembly
(See Fig.3)
• Remove the front panel assembly and bottom cover.
(1) From the both sides of the main body, remove the two
screws A attaching the front chassis assembly.
(2) Release the two joints d and two joints e.
a
b
c
Fig.2
d
A
d
Front chassis assembly
Fig.3
A
e
e
(No.MA248)1-11
3.1.4 Removing the side heat sink
(See Fig.4)
Reference:
Remove the front panel and front chassis assemblies as re-
quired.
From the left side of the main body, remove the two screws B and
three screws C attaching the side heat sink.
B
3.1.5 Removing the rear bracket
(See Fig.5)
• Remove the bottom cover.
(1) From the back side of the main body, remove the screws
D, screw E, tow screws F, three screws G and screw H attaching the rear bracket.
(2) Remove the rear bracket.
Reference:
The quantity of screws D differs by each model.
D
G
G
C
Fig.4
Cable holder
G
E
(For KD-DV4201 and KD-DV4202)
F
G
Side heat sink
Rear bracket
D
Rear bracket
D
G
H
D
G
1-12 (No.MA248)
E
F
Fig.5
D
H
3.1.6 Removing the main board
(See Figs.5 and 6)
• Remove the front panel assembly, bottom cover, front chassis
assembly and side heat sink.
Reference:
Remove the rear bracket as required.
(1) From the back side of the main body, remove the three
screws G attaching the main board. (See Fig.5.)
(2) From the bottom side of the main body, remove the three
screws J attaching the main board. (See Fig.6.)
(3) Disconnect the connector CN961
the DVD mechanism assembly and take out the main
board from the main body. (See Fig.6.)
3.1.7 Removing the DVD mechanism assembly
(See Fig.7)
• Remove the front panel assembly, bottom cover, front chassis
assembly, side heat sink and main board.
(1) From the inside of the top chassis, remove the three
screws K attaching the DVD mechanism assembly.
(2) Take out the DVD mechanism assembly from the top chas-
sis.
on the main board from
CN961
J
DVD mechanism assembly
K
J
J
Main board
Fig.6
K
K
Fig.7
Top chassis
(No.MA248)1-13
3.1.8 Removing the main sub board
(See Figs.8 to 10)
• Remove the front panel assembly, bottom cover, front chassis
assembly, side heat sink, main board and DVD mechanism assembly.
(1) From the top side of the DVD mechanism assembly, re-
move the two screws M attaching the dust cover. (See
Fig.8.)
(2) Remove the dust cover from the DVD mechanism assem-
bly. (See Fig.8.)
Reference:
When attaching the dust cover, align the joints f in the
holes of the dust cover before attaching the screws M.
(See Fig.8.)
(3) Release the lock of the connector CN962
board and disconnect the card wire. (See Fig.9.)
(4) Bend the joint g in the direction of the arrow. (See Fig.9.)
(5) Remove the two screws N attaching the main sub board
and remove the main sub board from the DVD mechanism
assembly. (See Fig.9.)
Reference:
• When attaching the main sub board, align the joints h in the
holes of the main sub board before attaching the screws N.
(See Fig.9.)
• When the resolution of DVD mechanism assembly is done
sequentially, remove the two screws P attaching the support
bracket. (See Fig.10.)
• Remove the card wire from the connector CN401
quired. (See Fig.10.)
on the main sub
as re-
DVD mechanism assembly
Dust cover
Fig.8
DVD mechanism assembly
CN962
h
M
Lock
f
M
f
g
N
P
h
Main sub board
Fig.9
Support bracket
CN401
Fig.10
1-14 (No.MA248)
3.1.9 Removing the switch board
(See Figs. 11 to 13)
• Remove the front panel assembly.
(1) From the back side of the front panel assembly, remove the
four screws Q attaching the rear cover. (See Fig.11.)
(2) Release the joints j attaching the rear cover to the front
panel assembly. (See Fig.12.)
(3) Release the joint k and take out the switch board while lift-
ing the switch board from the front panel assembly little by
little. (See Fig.13.)
Reference:
Remove the volume knob from the front side of the front panel
assembly at the same time.
Note:
Do not lose the compression springs when removing the
switch board. (See Fig.13.)
Q
Q
Rear cover
Q
Fig.11
Joints j
Joints jJoints j
Fig.12
Switch board
Joint
Fig.13
Joints j
Front panel assembly
k
(No.MA248)1-15
3.2DVD mechanism assembly
3.2.1 Removing the mechanism control board
(See Fig.1)
Caution:
Before disconnecting the flexible wire extending from the DVD
pickup, solder the short-circuit point on the flexible wire using
a grounding soldering iron. If you do not follow this instruction,
the DVD pickup may be damaged.
(1) Turn over the body, and solder the short-circuit points on
the flexible wire extending from the DVD pickup.
(2) Disconnect the flexible wire from connector CN101
mechanism control board.
(3) Disconnect the card wire from connector CN201
mechanism control board.
(4) Disconnect the flexible wire from connector CN202
mechanism control board.
(5) Unsolder two soldered points a on the mechanism control
board and remove the wire extending from the feed motor.
(6) Remove the screw A attaching the lug wire.
(7) Remove the two screws B and screw C attaching the
mechanism control board.
Caution:
• As the flexible wire to be connected to CN101
attach it to the mechanism control board using a double
tape.
• After reassembling, unsolder the short-circuit points.
on the
on the
on the
, make sure to
Flexible wire
Double tape
CN101
B
Short-circuit points
A
Lug wire
B
CN201
Feed motor
a
C
CN202
Mechanism control board
Fig.1
1-16 (No.MA248)
3.2.2 Removing the top cover
(See Fig.2)
(1) Remove the two screws D attaching the top cover on the
back of the body.
(2) Remove the top cover upward.
Reference:
When reassembling, set part b of the top cover under the
bending part c of the chassis frame.
3.2.3 Removing the mechanism section
(See Fig.2 to 4)
• Remove the top cover.
(1) From the bottom of the body, remove the screw E attaching
the lug wire. (See Fig.2.)
(2) Remove the two screws F attaching the right and left stop-
pers on the front side. (See Fig.2.)
(3) Remove the two floating springs on the bottom of the body.
(See Fig.3.)
(4) Move the mechanism section upward and remove from the
chassis frame.
The three damper springs come off from the dampers.
(See Fig.4.)
Caution:
• When reassembling, reattach the damper spring to the
damper respectively and insert the three shafts on the bottom of the mechanism to the dampers.
• Before inserting the shaft to the dampers, apply IPA to the
hole of damper.
Floating spring
Fig.3
Mechanism section
Stopper
F
Top cover
Stopper
F
D
D
b
c
E
Lug wire
Damper SP.(F)
(Silver)
Damper (F)
(Black)
Damper SP.(F)
(Silver)
Damper (F)
(Black)
Fig.4
Damper SP.(R)
(Red)
Damper (R)
(Purple)
Chassis frame
Fig.2
(No.MA248)1-17
3.2.4 Removing the clamper unit
(See Fig.5 to 7)
• Remove the top cover and the mechanism section.
(1) Remove the clamper2 spring on the bottom of the mecha-
nism section. (See Figs.5.and 6.)
(2) Release the part d of the clamper spring from the bending
part of the chassis base assembly. (See Fig.7.)
(3) Move the clamper unit in the direction of the arrow and turn.
Release the two joints e and f, then remove the clamper
unit upward. (See Fig.6.)
3.2.5 Reattaching the clamper unit
(See Fig.5 to 9)
(1) Attach the clamper spring to the clamper unit. (See Fig.8.)
(2) Move the clamper unit to set the side joints e and f to each
boss of the chassis base assembly. Make sure that part g
is inserted to the notch of the chassis base assembly. (See
Figs.5 and 9.)
(3) Move the part d of the clamper spring to the outside of the
bending part of the chassis base assembly. (See Fig.7.)
(4) Attach the clamper2 spring to the chassis base assembly.
(See Figs.5 and 6.)
Caution:
When reattaching, temporarily hook the end of the clamper
spring as shown in the figure to make the work easy. (See
Fig.8.)
Clamper unit
Clamper2 spring
Chassis base assembly
Fig.6
Clamper spring
Clamper spring
f
Clamper2 spring
Chassis base assembly
g
d
Chassis base assembly
Fig.7
e
Fig.5
1-18 (No.MA248)
Clamper unit
Clamper unit
Clamper spring
Fig.8
Fig.9
g
Notch
(No.MA248)1-19
3.2.6 Removing the front unit
(See Fig.10 to 12)
• Remove the top cover and the mechanism section.
(1) Disconnect the flexible wire from connector CN202 on the
mechanism control board at the bottom of the body. (See
Fig.10.)
(2) Remove the screw G attaching the front unit on the top of
the body. (See Fig.11.)
(3) Move the front unit toward the front to release joint h, and
release two joints i and j on the right side of the chassis
base assembly. Then remove the front unit upward. (See
Figs.11 and 12.)
(4) Remove the two screws H attaching the switch board. (See
Fig.12.)
Reference:
You can remove the switch board only without removing the
front unit.
Caution:
When reassembling, attach the flexible wire extending from
the switch board using the double tape. (See Figs.10 and 12.)
Mechanism control board
G
Front unit
h
Fig.11
CN202
Double tape
Fig.10
Flexible wire
Double tape
j
i
H
Switch board
Front unit
G
1-20 (No.MA248)
h
Fig.12
3.2.7 Removing the loading arm assembly
(See Fig.13 , 14)
• Remove the top cover, the mechanism section and the front
unit.
(1) From the top of the body, move the loading arm assembly
from the front side upward, and release the bosses from
the right and left joints k and m of the chassis base assembly.
(2) Release the boss from notch n of the connect arm on the
right side of the body, and release the boss from notch p of
the slide cam assembly on the left side.
m
Loading arm assembly
Side cam
assembly
p
m
k
Fig.13
Loading arm assembly
k
n
n
Connect arm
Fig.14
(No.MA248)1-21
3.2.8 Removing the rod (L)(R)/roller assembly
(See Fig.15 and 16)
• Remove the top cover, the mechanism section, the front unit
and the loading arm assembly.
(1) Release the rod (L) and (R) from the joints q at the bottom
of the loading arm assembly (See Fig.15.)
(2) Remove the roller assembly from the loading arm assem-
bly. (See Fig.16.)
(3) Remove the two collars and washer from the roller assem-
bly. (See Fig.16.)
Caution:
After attaching the loading arm assembly to the roller assembly, attach the rod (L) and (R). Attach the rods to the right and
left collars of the roller. (See Fig.15.)
When reattaching the rod (L) and (R) to the loading arm assembly, engage each joint as shown in Fig.15. As joints q of
the rod (L), let the rod through q before reattaching it.
Collar
Collar
Rod(R)Rod(L)
q
q
q
Collar
Rod(L)
Rod(R)
q
Loading arm assembly
Fig.15
Roller assembly
Loading arm assembly
q
Rod(L)
q
Collar
Washer
Rod(R)
1-22 (No.MA248)
Fig.16
3.2.9 Removing the DVD pickup assembly
(See Fig.17 to 19)
• Remove the mechanism control board.
(1) From the bottom of the body, turn the feed gear in the di-
rection of the arrow to move the DVD pickup outwards.
(See Fig.17.)
(2) Remove the screw J attaching the thrust spring. (See
Fig.17.)
(3) Remove the DVD pickup assembly upward on the L.S.gear
side and release from sub shaft at joint r. Move the lead
screw of the DVD pickup assembly in the direction of the
arrow to release from joint s. (See Fig.18.)
Caution:
• When releasing the lead screw at joint s, the L.S.collar
comes off at the end of the lead screw. When reassembling, reattach the L.S.collar to the lead screw and
engage joint s. (See Fig.18.)
• When reattaching the L.S.collar, reattach it to the point
s of the lead screw, and to the rod (M). Make sure that
the L.S.collar is set on the rod (M) spring. (See Fig.18.)
(4) Remove the screw K attaching the rack spring/ rack plate
on the DVD pickup. (See Fig.19.)
(5) Pull out the lead screw. (See Fig.19.)
Caution:
Perform adjustment after replacing the pickup.
DVD Pickup assembly
DVD Pickup assembly
Feed gear
J
Thrust spring
Fig.17
s
L.S.collar
Rod(M)
Lead screw
Sub shaft
L.S.collar
r
L.S.gear
Fig.18
K
Rack spring
Lead screw
Rack plate
DVD Pickup
Fig.19
(No.MA248)1-23
3.2.10 Removing the spindle motor
r
(See Fig.20)
• Remove the mechanism control board.
Remove the two screws L attaching the spindle motor on the
bottom of the body.
Caution:
Perform adjustment when reattaching the spindle motor.
3.2.11 Removing the feed motor assembly
(See Fig.21 and 22)
• Remove the mechanism control board.
(1) Remove the feed TRI. spring on the bottom of the body.
(See Fig.21.)
(2) Remove the two screws M attaching the feed motor as-
sembly. (See Fig.21.)
(3) Remove the slit washer from the motor H. assembly and
pull out the worm wheel. (See Fig.22.)
Remove the two screws N attaching the feed motor. (See
Fig.22.)
Spindle motor
Feed TRI. spring
L
Fig.20
M
Feed motor assembly
1-24 (No.MA248)
Fig.21
Slit washer
Worm wheel
Feed moto
N
Motor H. assembly
Fig.22
SECTION 4
ADJUSTMENT
4.1Test instruments required for adjustment
(1) Digital oscilloscope (100MHz)
(2) Jitter meter
(3) Digital tester
(4) Electric voltmeter
(5) Tracking offset meter
(6) Test Disc : VT501 or VT502
(7) Extension studs : STDV001-3P
(8) Extension cable : EXTDV002-30P
4.3Connection method
Connection procedure
(1) Attach the front chassis assembly to the main board.
(2) Connect the front panel assembly to the main board.
(3) Attach the heat sink and rear bracket to the main board.
(4) Attach the extension studs to the DVD mechanism assembly.
(5) Connect the DVD mechanism assembly and the main board with a extension cable.
4.2Standard measuring conditions
Power supply voltageDC14.4V(11 to 16V)
Load impedance4Ω(2 Speakers connection)
Line Output20KΩ
Caution:
Be sure to attach the heat sink and rear bracket onto the power
amplifier IC and regulator IC respectively, before supply the
power. If voltage is applied without attaching these parts, the
power amplifier IC and regulator IC will be destroyed by heat.
Extension cable
EXTDV002-30P
Heat sink
Rear bracket
Main board
Extension stud
STDV001-3P
Extension studs
STDV001-3P
(No.MA248)1-25
After replacing the pickup, set the unit in the service mode to display a jitter value on the LCD. Confirm that the jitter value measured
with a jitter meter is within 12% of the jitter value displayed on the LCD. If it is within 12%, then adjustment is not necessary. Please
note that a jitter value displayed on the LCD is hex data. Refer to the corresponding decimal notation value using the Jitter Conversion
Table and confirm it with the measured value.
Fix the screws "a", "b" and "c" with screw lock paint.
If the measured jitter value is outside the 12% tolerance range, perform the following adjustments.
c
b
a
Jitter value adjustment procedure (Pickup horizontal level adjustment relative to the DVD recording surface)
(For the adjustment tool use a 3 mm wrench and not a screwdriver, this procedure will make the adjustment easier.
3 mm wrench
(1) Set the unit to the service mode and display a jitter value (hex data) on the LCD.
(2) Turn each of the screws a, b and c, by a half-turn per step, in the direction that reduces the jitter value in order to minimize it.
(Do not turn a screw more than a half turn at a time, but adjust the screw in the cycle of same level turn by pair of b+c→ pair of
a+b.)
(3) After completing the adjustment, secure the screws with screw lock paint.
1-26 (No.MA248)
4.4Jitter value conversion table
Load the test DVD and set the unit to the service mode. A jitter value converted to the hex value is displayed on the LCD.
Refer to the corresponding decimal notation value shown in the following Jitter Conversion Table.
The adjustment is OK if the jitter value measured with a jitter meter is within 12% of the jitter value displayed on the LCD.
If the measured jitter value is outside the 12% tolerance range, adjust it to minimize the difference between the measured
value and the displayed value.
Keep this state more than 2 seconds while
continuing pressing the [SEL] button, [SOURCE]
button and [STANDBY/ON ATTENUATOR]
button sequentially.
The unit enters the service mode.
"INIT ALL" isInitialize all data to the factory setting
indicated on the LCD.
Press the [SEL] key
:The system control EEPROM is
initialized entirely.
"VERSION" is Microcomputer version display
indicated on the LCD.
Press the [SEL] key
S-XXX-YY System control CPU
version/ROM correction version
DVD-XXXXDVD version
*Exchanging it operate each indication with the
[DISC UP] button and [DISC DOWN] button.
"AREA/RGN" is Destination area/region display
indicated on the LCD.
Press the [SEL] key
STS-X XX System control destination
DVD-X XX DVD unit destination
DVDRGN X DVD unit region
*Exchanging it operate each indication with the
[DISC UP] button and [DISC DOWN] button.
"VIDEO" is Setting of NTSC or PAL
indicated on the LCD.
Press the [SEL] key
"NTSC" or "PAL" are indicated on the LCD.
*Exchanging it operate each indication with the
[DISC UP] button and [DISC DOWN] button.
Note:
There is the model that is not equipped with
this mode by a version.
"CLR ERR" is Clear loading/ejection error history
indicated on the LCD.
Press the [SEL] key
:The error history stored in the EEPROM is
cleared.
"CD ERROR" isRead loading and ejection error history
indicated on the LCD.
Press the [SEL] key
: The error history saved in the system control
is read and displayed.
TOT-xxxx : Total error count.
Total error count
(A figure between 0 and 9999 is
displayed. 10000 or more is also
displayed as 9999.)
Enyyzzzz: Latest three error code.
Detailed error code
Error code
Counter
0nyyzzzz: First five error code
Detailed error code
Error code
Counter
*Exchanging it operate each indication with the
Error code (1 byte)
[DISC UP] button and [DISC DOWN] button.
First byte[01] Eject error
AB
[02] Loading error
1-28 (No.MA248)
AB
"DVD-TEMP" is
indicated on the LCD.
Detailed error code (2 bytes)
First byteHigher 4 bits Route NO. (Process of error occurrence)
Lower 4 bits Error type
. . . .
Refer to charts 1.1 and 1.2.
. . . .
*Displayed with loading/ejection error only.
[1] Time out
[2] Switch status error
[3] Swinging error
Second bytebit7
. . . .
Disc type (0: 12 cm. 1: 8 cm)
bit6,5
bit4
bit3
bit2
bit1 SW 1 status
bit0 RESET SW status
. . . .
. . . .
. . . .
. . . .
. . . .
. . . .
Fixed at 0
SW 1 status
SW 2 status
SW 3 status
(Example) When a switch status error occurs during loading route 3 and
the switch status is L/L/H/H/H (00111B = 07H), the error code
and detailed error code become: [09 3207].
*Transition in the center loading (Similar to 12cm in the side loading)
Chart 1.2 8cm Disc switch status transition
Press the [SEL] key
Thermistor's temperature data readout
: Data in the temperature sensor in the DVD unit
is read every 5 seconds and displayed in hex numbers.
"SYS-TEMP" is
indicated on the LCD.
"CHK MODE" is
indicated on the LCD.
"RUNNING" is
indicated on the LCD.
"MEMCHECK" is
indicated on the LCD.
"INIT" is
indicated on the LCD.
Press the [SEL] key
Press the [SEL] key
Press the [SEL] key
Press the [SEL] key
Press the [SEL] key
Thermistor's temperature data readout
: Data in the temperature sensor in the system control
is read every 5 seconds and displayed in hex numbers.
DVD unit check mode
(See section "DVD unit check mode" for details.)
Running mode: For use in running tests.
Memory check
: The remaining data capacity of the disc is
displayed on the LCD.
Initialize user set data
: The system control EEPROM is initialized except
for the loading/ejection error history.
(No.MA248)1-29
4.6DVD unit check mode
Change LCD indication with a [FF ] button and a [REW ] button.
Check item list
No.A/D keyDVD unit operationIndication contents
1[1]Start at normal speedNORMPLAY
2[2]Tracking off on the outermost position of CDEF-BAL
3[3]Tracking off on the innermost position of CDEF-BAL
4[4]CD_LD lights and laser current is displayedCDLD ON
5[5]DVD_LD lights and laser current is displayedDVDLD ON
6[6]DVD x1 jitter measuring modeDVDx1JIT
7[DISP]Indication of EEPROM contents ROM DATA
8[SOURCE]Initialization of EEPROM contentsROMCLEAR
9[SEL]Indication of temperatureTEMP
10[MODE]Search & jitter measurement to an appointedDVD JIT
11[BAND]Setting of MONITOR terminalMONITOR
12 [DISC UP
13 [DISC DW
Example of
LCD indication
(After start, it is measured JITTER on theCUR Laser current value
internal position)JIT Jitter value
(for use in mechanism measurement)CUR Laser current value
position of DVDPLC(Position measured with
]
DVDx1 double speed startPLAY
(After start, it is measured JITTER on theCUR Laser current value
internal position)JIT Jitter value
]
Disc stopped & LD-OFFSTOP
* * * *
* * * *
OUTTROFFFor EF phase error
INNTROFFFor EF phase error
CUR Laser current value
* * * *
JIT Jitter value
* * * *
CUR Laser current value
* * * *
JIT Jitter value
* * * *
* * * *
JIT Jitter value
* * * *
ADDREEPROM address
DATAEEPROM contents
TEMPTemperature
* * * *
* * * *
* * * *
* * * *
JIT VT-501 jitter value)
* * * *
M1
* * * *
M2
* * * *
* * * *
* * * *
Note In the case of the jitter measurement: Begin a service mode after insert a disc.
1-30 (No.MA248)
.
.
Press key [1] of No.1 before an item in which the No.2 or 3 key is pressed.
.
Press key [1] of No.1 or key [12] of No.12 before an item in which the No.10 key is pressed and confirm
the indication of jitter value on the LCD.
.
No.6 starts only a DVD1 layer disc. Even other discs start DVD1 layer.
.
When No.1 and No.12 are pushed after jitter indication, a focus jump is executed. (only DVD2 layer)
.
Stop a disc before OPEN, CLOSE by all means.(OPEN and CLOSE are not executed in a disc turn.)
.
The check mode can be exited either by pressing the [POWER] key or by resetting the unit.
5.1Feed section
SECTION 5
TROUBLESHOOTING
Is 4V present at both
sides of the feed motor?
Is the voltage output at
pin 17 and pin 18 of IC201?
Is the voltage input at pin
22 of IC201?
Is the voltage output at
pin 82 of IC301?
Is the power supply
present at pin 6
of IC301?
Check the connections
of D3.3V power supply.
5.2Focus section
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Check the feed motor.
Check the connections
between the feed motor
and IC201.
Is the power supply
present at pin 19
and pin 28 of IC201?
Check the connections
of M8V power supply.
Check the connections
between IC201 and
IC301.
Check IC301.
NO
YES
Is the power supply
present at pin 10
of IC201?
Check the connections
of M5V power supply.
YES
Check IC201.
NO
Is the voltage input at pin
3 of IC201?
NO
Is the voltage output at
pin 148 of IC301?
NO
Is the power supply
present at pin 6
of IC301?
NO
Check the connections
of D3.3V power supply.
YES
YES
YES
Is the power supply
present at pin 19
and pin 28 of IC201?
Check the connections
of M8V power supply.
Check the connections
between IC201 and
IC301.
Check IC301.
NO
YES
Is the power supply
present at pin 10
of IC201?
Check the connections
of M5V power supply.
YES
Check IC201.
NO
(No.MA248)1-31
5.3Spindle section
Is the disk rotated?
NO
Is the voltage output at
pin 20,pin22 and pin 22
of IC251?
NO
Is the voltage input at pin
17 of IC251?
NO
Is the voltage output at
pin 76 of IC301?
NO
Is the power supply
present at pin 6
of IC301?
NO
YES
Does the RF signal appear
at pin 111 of IC301?
YES
Check the spindle motor
and its wiring.
YES
Is the power supply
present at pin 14
of IC251?
Check the connections
of D5V power supply.
Check the connections
YES
between IC201 and
IC301.
YES
Check IC301.
NO
YES
Is the RF waveform at
pin 111 of IC301 distorted?
Check the circuits in
the vicinity of IC301
or the pickup.
YES
Is the power supply
present at pin 15
and pin 25 of IC501?
Check the connections
of M8V power supply.
NO
NONO
YES
Proceed to the Tracking
section.
YES
Check IC501.
Check the connections
of D3.3V power supply.
5.4Tracking section
Is the voltage input at pin
6 of IC201?
NO
Is the voltage output at
pin 147 of IC301?
NO
Is the power supply
present at pin 6
of IC301?
NO
Check the connections
of D3.3V power supply.
YES
Is the power supply
present at pin 19
and pin 28 of IC201?
Check the connections
of M8V power supply.
Check the connections
YES
between IC201 and
IC301.
YES
Check IC301.
NO
YES
Is the power supply
present at pin 10
of IC201?
Check the connections
of M5V power supply.
YES
Check IC201.
NO
1-32 (No.MA248)
5.5Signal processing section
Is the sound output from
both channels (L, R)?
NO
No sound from either
channel.
NO
Compare the L-ch and
R-ch to locate the
defective point.
5.6Maintenance of laser pickup
(1) Cleaning the pick up lens
Before you replace the pick up, please try to clean the lens
with a alcohol soaked cotton swab.
(2) Life of the laser diode
When the life of the laser diode has expired, the following
symptoms will appear.
• The level of RF output (EFM output: amplitude of eye
pattern) will be low.
YES
Normal
YES
Is 9V present at pin 32
of IC161?
Is 9V present at pin 10
of IC901?
Check IC901 and its
peripheral circuits.
NO
NO
Is the audio signal
(including sampling
YES
output components)
output to pins 1 and 7 of
IC411 during playback?
NO
Check IC411 and its
peripheral circuits.
Check the connections
YES
between pin 32 of IC161
and pin 10 of IC901.
5.7Replacement of laser pickup
Turn off the power switch and disconnect the
power cord.
Replace the pickup with a normal one. (Refer
to "Removing the pickup unit" on the previous page.)
Is the audio signal output
YES
at pin 15 and pin 18 of
IC161 during playback?
Check IC161 and its
peripheral circuits.
Check the power
amplifier IC301.
NO
YES
Is RF output
1.3 0.4Vp-p?
NO
Replace it.
YES
OK
(3) Semi-fixed resistor on the APC PC board
The semi-fixed resistor on the APC printed circuit board
which is attached to the pickup is used to adjust the laser
power.Since this adjustment should be performed to match
the characteristics of the whole optical block, do not touch
the semi-fixed resistor.
If the laser power is lower than the specified value, the laser diode is almost worn out, and the laser pickup should
be replaced. If the semi-fixed resistor is adjusted while the
pickup is functioning normally, the laser pickup may be
damaged due to excessive current.
Plug the power cord in and turn the power on.
At this time, check that the laser emits for about
seconds and the objective lens moves up and down.
Note: Do not observe the laser beam directly.
Victor Company of Japan, Limited
Mobile Entertainment Business Group Mobile Entertainment Category 10-1,1chome,Ohwatari-machi,Maebashi-city,Gumma-ken, 371-8543,Japan
(No.MA248)
Printed in Japan
VPT
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