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SERVICE MANUAL
9-INCH WIDE SCREEN MONITOR WITH DVD PLAYER
6
2005
MA167
KV-MRD900
Area suffix
J ------------- Northern America
E ------------- Southern Europe
EU ------------------------- Turkey
A ------------------------ Australia
UT ------------------------- Taiwan
U -------------------- Other Areas
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34
COPYRIGHT © 2005 Victor Company of Japan, Limited No.MA167
2005/6
SPECIFICATION
WIDESCREEN MONITOR
Screen 9 inch liquid crystal panel
Number of pixel 336 960 pixels(480 vertical × 234 horizontal × 3)
Drive method TFT (Thin Film Transistor) active matrix format
Cordless audio Infrared audio transmitter L-channel: 2.3 MHz
R-channel: 2.8 MHz
Effective listening angle: 30°
Effective range: 2 m
Color system NTSC/PAL
Input Video RCA pin × 2 circuits
1 V(p-p), 75
Audio RCA pin × 2 circuits
1.5 V(rms)
Output Video RCA pin × 1 circuit
1 V(p-p), 75
Audio RCA pin × 1 circuit
1.5 V(rms)
DIGITAL OUT Optical
DVD/CD PLAYER SECTION
Signal detection system Non-contact optical pickup (semiconductor laser)
Number of channels 2 channels (stereo)
Frequency response DVD, fs=48 kHz/96 kHz 16 Hz to 22 000 Hz
VCD, CD 16 Hz to 20 000 Hz
Dynamic range 93 dB
Signal-to-noise ratio 95 dB
Wow and flutter Less than measurable limit
MP3 (MPEG Audio Layer 3) Max. Bit Rate 320 kbps
WMA (Windows Media Audio) Max. Bit Rate 192 kbps
GENERAL
Power requirement Operating voltage DC 14.4 V (11 V to 16 V allowance)
Grounding system Negative ground
Allowable operating temperature 0°C to +40°C
Allowable storage temperature -20°C to +80°C
Dimensions (W × H × D) Installation size (approx.) 215 mm × 49 mm × 374 mm
Mass (approx.) 2.9 kg (excluding accessories)
CORDLESS HEADPHONES
Type Open-air type
Driver unit 30 mm Mylarcone dynamic speaker
Impedance 16
Frequency response 20 Hz to 20 000 Hz
Infrared wavelength 850 nm ± 50 nm
Power requirements DC 3 V (2.4 V to 3.3 V allowance) (R03/AAA battery × 2)
Mass (approx.) 170 g (except batteries)
Allowable operating temperature -30°C to +65°C
Design and specifications are subject to change without notice.
1-2 (No.MA167)
SECTION 1
PRECAUTIONS
1.1 Safety 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.MA167)1-3
1.2 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.
1.2.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD 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.
1.3 Handling the traverse unit (optical pickup)
(1) Before disconnecting the flexible wire from the connector CN101 on the mechanism control board, solder the short-circuit points
on the flexible wire.
Caution:
If you do not follow this instruction, the DVD pickup may be damaged.
(2) Disconnect the flexible wire from the connector CN101 on the mechanism control board.
(3) Remove the solders from the short-circuit points on the flexible wire after replacing the DVD pickup.
(4) Connect the flexible wire to the connector CN101 on the mechanism control board.
Flexible wire
CN101
Short-circuit points
Mechanism control board
1-4 (No.MA167)
1.4 Important for laser products
1.CLASS 1 LASER PRODUCT 5.CAUTION : If safety switches malfunction, the laser is able
2.DANGER : Invisible laser radiation when open and inter to function.
lock failed or defeated. Avoid direct exposure to beam. 6.CAUTION : Use of controls, adjustments or performance of
3.CAUTION : There are no serviceable parts inside the procedures other than those specified here in may result in
Laser Unit. Do not disassemble the Laser Unit. Replace hazardous radiation exposure.
the complete Laser Unit if it malfunctions.
4.CAUTION : The CD,MD and DVD player uses invisible Please use enough caution not to
!
laser radiation and is equipped with safety switches which see the beam directly or touch it
prevent emission of radiation when the drawer is open and in case of an adjustment or operation
the safety interlocks have failed or are defeated. It is check.
dangerous to defeat the safety switches.
REPRODUCTION AND POSITION OF LABELS
WARNING LABEL
CAUTION : Visible and Invisible ADVARSEL : Synlig og usynlig VARNING : Synlig och VARO : Avattaessa ja suojalukitus
CLASS 1 laser radiation when open and
interlock failed or defeated.
laserstråling når maskinen er
åben eller interlocken fejeler.
osynling laserstrålning när
den öppnas och spärren är
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
LASER PRODUCT AVOID DIRECT EXPOSURE TO
BEAM. (e)
Undgå direkte eksponering til
stråling. (d)
urkopplad. Betrakta ej
strålen. (s)
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
(No.MA167)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
1-6 (No.MA167)
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the top cabinet assembly
(See Figs.1 and 2)
(1) From the bottom side of the main body, remove the six
screws A attaching the top cabinet assembly to the main
body. (See Fig1.)
A
(2) From the top side of the main body, push the open button
and open the monitor assembly. (See Fig.2.)
(3) Raise the monitor assembly in the direction of the arrow 2
while sliding the knob in the direction of the arrow 1 (the di-
rection of RELEASE indication). (See Fig.2.)
(4) Remove the top cabinet assembly in an upward direction.
A A
A
Fig.1
Monitor assembly
1
Knob Open button
2
Top cabinet assembly
Fig.2
(No.MA167)1-7
3.1.2 Removing the front cabinet assembly
(See Figs.3 and 4)
· Remove the top cabinet assembly.
(1) Release the lock of the connector CN511 on the front
board in an upward direction and disconnect the card wire.
(See Fig.3.)
(2) Remove the two screws B attaching the front cabinet as-
sembly. (See Fig.3.)
(3) From the bottom side of the main body, push the tabs a and
remove the front cabinet assembly in the direction of the ar-
row. (See Fig.4.)
B B
CN511 Front board
Lock
Front cabinet assembly
Fig.3
a a
Front cabinet assembly
Fig.4
1-8 (No.MA167)
3.1.3 Removing the DVD mechanism assembly
(See Figs.5 and 6)
· Remove the top cabinet assembly.
(1) From the top side of the main body, release the lock of the Mechanism control board
connector CN511 on the front board in an upward direction DVD shield top
and disconnect the card wire. (See Fig.5.) C
(2) Release the lock of the connector CN401 on the mecha-
nism control board and disconnect the card wire. (See
Fig.5.) b
Reference:
When connecting the card wires, pass them through the
sections b on the DVD shield top as before. (See Fig.5.) b
(3) Remove the three screws C and remove the DVD shield
top. (See Fig.5.)
(4) Remove the two screws C and take out the DVD mecha- C C
nism assembly. (See Fig.6.)
Lock CN401
Lock
Front board CN511
Fig.5
DVD mechanism assembly
C C
Fig.6
(No.MA167)1-9
3.1.4 Removing the LED boards (L)/(R)
(See Figs.7 and 8)
· Remove the top cabinet assembly.
(1) From the top side of the main body, remove the four screws
D attaching the LED boards (L)/(R). (See Fig.7.)
(2) Disconnect the card wires from the connectors (CN513, Main board
CN514) on the main board and take out the LED boards Main board
(L)/(R). (See Fig.7.) CN514
Reference:
CN513
· Remove the holders from the LED boards (L)/(R) as re-
quired. (See Fig.8.)
· When removing the holder, remove the solders from the sol-
dered sections c of the LED and remove the holder in the di-
rection of the arrow 2 while releasing the claws d in the
direction of the arrow 1. (See Fig.8.)
D D
LED board (R) LED board (L)
Fig.7
LED LED
Holder 2 2 Holder
LED board (R) LED board (L)
d d
1 1
1 1
c c
Fig.8
1-10 (No.MA167)
3.1.5 Removing the monitor assembly
(See Figs.9 and 10)
· Remove the top cabinet assembly.
(1) Release the lock of the connector CN505 on the main Gear cover assembly
board and disconnect the card wire. (See Fig.9.) f
(2) Remove the two screws E and pull out the card wire from FFC bracket assembly F
the FFC bracket assembly. (See Fig.9.)
Reference:
When reassembling, pass the card wire through the FFC
bracket as before. (See Fig.9.)
(3) Remove the springs from the sections (e, f). (See Fig.9.)
(4) Remove the four screws F and take out the gear cover as-
sembly from the main body. (See Fig.9.) Springs
(5) Take out the gear 2 and gear 1 assembly. (See Fig.10.)
(6) Remove the five screws F and take out the monitor assem-
bly. (See Fig.10.)
F
e
E
CN505
E F
Lock
Main board
Fig.9
Gear 1 assembly Monitor assembly
Gear 2
F
F F
Fig.10
(No.MA167)1-11
3.1.6 Removing the arm chassis assembly
(See Figs.11 and 12)
· Remove the top cabinet, LED board (R) and monitor assembly.
(1) From the back side of the main body, remove the two Bottom cabinet 1 Arm chassis assembly
screws G attaching the arm chassis assembly to the bot-
tom cabinet 1. (See Fig.11.)
(2) From the top side of the main body, disconnect the parallel
wire from the connector CN508 on the main board. (See
Fig.12.)
(3) Remove the two screws H attaching the cord bracket. (See
Fig.12.)
(4) Remove the car cable from the wire holder. (See Fig.12.)
G
Reference:
When reassembling, fix the wires with the wire holder as Fig.11
before.
(5) Remove the two screws J and screw J' and take out the Arm chassis assembly
arm chassis assembly from the main body. (See Fig.12.) Main board
Reference: J H J
When attaching the screw J', attach the wire holder with it.
(See Fig.12.)
J'
CN508
Cord bracket
Wire holder H
Car cable
Fig.12
1-12 (No.MA167)
3.1.7 Removing the jack board
(See Fig.13)
· Remove the top cabinet, LED board (R), monitor assembly and
arm chassis assembly. Arm chassis assembly
From the back side of the arm chassis assembly, remove the two K
screws K attaching the jack board.
Jack board
Fig.13
3.1.8 Removing the main board
(See Fig.14)
· Remove the top cabinet, DVD mechanism assembly, LED
boards (L)/(R), monitor assembly and arm chassis assembly.
(1) Pull the door SW knob out of the main board while releas-
ing the claws g of the door SW knob. g g
Note: CN517
When releasing the claws g, take care not to break it. CN504 M Door SW knob
(2) Release the lock of the connector CN509 on the main Car cable
board in an upward direction and disconnect the card wire.
(3) Remove the four screws M and take out the main board
from the bottom cabinet 1.
M
Reference:
Disconnect the car cable from the connectors (CN504,
CN517) on the main board as required.
M
Lock
CN509
Bottom cabinet 1 M
Main board
Fig.14
(No.MA167)1-13
3.1.9 Removing the TFT board
(See Figs.15 to 17)
· Remove the top cabinet and monitor assemblies.
(1) From the front side of the monitor assembly, remove the h Rear panel h
front feet. (See Fig.15.)
(2) Remove the four screws N from the monitor assembly.
(See Fig.15.)
(3) From the back side of the monitor assembly, release the
joints h and remove the rear panel. (See Fig.16.)
(4) Remove the spacer fixing the card wire. (See Fig.17.)
Reference:
After connecting the card wire, fix it with the spacer as
before. (See Fig.17.)
(5) Release the lock of the connector CN1 on the TFT board
and disconnect the card wire. (See Fig.17.)
(6) Release the lock of the connector CN4 on the TFT board
and disconnect the flexible wire. (See Fig.17.)
(7) Remove the four screws P and take out the TFT board from
the monitor assembly. (See Fig.17.)
(8) From the forward side of the TFT board, disconnect the h h
wire from the connector CN3. (See Fig.17.)
Fig.16
3.1.10 Removing the monitor arm assembly
(See Figs.17 and 18) Monitor assembly
· Remove the top cabinet and monitor assemblies.
TFT board
(1) From the back side of the monitor assembly, remove the CN3 CN4
spacer fixing the card wire. (See Fig.17.) Lock
Reference:
After connecting the card wire, fix it with the spacer as
before. (See Fig.17.)
(2) Release the lock of the connector CN1 on the TFT board
and disconnect the card wire. (See Fig.17.)
Reference:
It is not necessary for the TFT board to be removed.
(3) From the bottom side of the monitor assembly, remove the
four screws Q and remove the monitor arm assembly. (See
P
Fig.18.)
Front foot Front foot
CN1
Lock Spacer P
Monitor assembly
Fig.17
Monitor assembly
Q Q
Monitor arm assembly
N N
Front foot Front foot Fig.18
Fig.15
1-14 (No.MA167)
3.1.11 Removing the LCD module
(See Figs.19 to 21)
· Remove the top cabinet assembly, monitor assembly, TFT
board and monitor arm assembly. TFT chassis
(1) From the back side of the monitor assembly, remove the
R R
eight screws R and remove the TFT chassis. (See Fig.19.)
(2) Remove the sections j and take out the TFT shield 1 with
the TFT shade. (See Fig.20.)
(3) Release the claws k in the direction of the arrow and take
out the LCD module from the front panel. (See Fig.21.)
Note:
When releasing the claws k, take care not to break them. (See
Fig.21.)
R R
Monitor assembly
Fig.19
TFT shield 1
j j
j TFT shade j
Fig.20
k LCD module k
k Front panel k
Fig.21
(No.MA167)1-15
3.1.12 Removing the front board
(See Fig.22)
· Remove the top cabinet and front cabinet assemblies.
From the inside of the front cabinet assembly, remove the four Front board
screws S and remove the front board.
S Front cabinet assembly S
Fig.22
1-16 (No.MA167)
3.2 DVD mechanism assembly
3.2.1 Removing the mechanism control board
(See Fig.1)
Caution:
Before disconnecting the flexible wire extending from the DVD Lug wire
pickup, solder the short-circuit point on the flexible wire using Flexible wire
Feed motor
a grounding soldering iron. If you do not follow this instruction,
Double tape
A B
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. a
(2) Disconnect the flexible wire from connector CN101 on the
mechanism control board.
(3) Disconnect the card wire from connector CN201 on the
mechanism control board.
(4) Disconnect the flexible wire from connector CN202 on the
mechanism control board.
CN101
(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. C
(7) Remove the two screws B and screw C attaching the B
mechanism control board.
Caution:
· As the flexible wire to be connected to CN101, make sure to
attach it to the mechanism control board using a double
tape. Short-circuit points
· After reassembling, unsolder the short-circuit points. CN201 CN202
Mechanism control board
Fig.1
(No.MA167)1-17
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 Floating spring
chassis frame. Fig.3
The three damper springs come off from the dampers.
(See Fig.4.) Mechanism section
Caution:
· When reassembling, reattach the damper spring to the
damper respectively and insert the three shafts on the bot-
tom of the mechanism to the dampers.
· Before inserting the shaft to the dampers, apply IPA to the
hole of damper.
D Damper SP.(F)
(Silver) Damper SP.(R)
Top cover (Red)
D
Damper (R)
(Purple)
Damper (F)
b
Stopper (Black)
Damper SP.(F)
(Silver) Damper (F) Chassis frame
(Black)
Fig.4
F c
E
Stopper
F
Lug wire
Fig.2
1-18 (No.MA167)
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- Clamper2 spring
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: Chassis base assembly
When reattaching, temporarily hook the end of the clamper
spring as shown in the figure to make the work easy. (See Fig.6
Fig.8.)
Clamper spring
Clamper unit
g
Clamper spring
d
Chassis base assembly
f Fig.7
e
Clamper2 spring
Chassis base assembly
Fig.5
(No.MA167)1-19
Clamper unit
Clamper spring
Fig.8
Clamper unit
g
Notch
Fig.9
1-20 (No.MA167)
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
G
Front unit
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.)
h
Mechanism control board Fig.11
Double tape
H
Switch board
Front unit G
j
i
Double tape
CN202
Flexible wire
Fig.10
h
Fig.12
(No.MA167)1-21
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 assem-
bly.
(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
k n
Fig.13
Loading arm assembly
Side cam
assembly
p
m
k
n
Connect arm
Fig.14
1-22 (No.MA167)
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. Collar Collar
(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- Rod(R) Rod(L)
bly. (See Fig.16.)
Caution:
After attaching the loading arm assembly to the roller assem-
bly, 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 as-
sembly, engage each joint as shown in Fig.15. As joints q of
the rod (L), let the rod through q before reattaching it.
q q
q q
Rod(R) Rod(L)
q q
Loading arm assembly
Fig.15
Collar
Washer
Roller assembly
Rod(R)
Collar
Rod(L)
Loading arm assembly
Fig.16
(No.MA167)1-23
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- Feed gear
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 J
comes off at the end of the lead screw. When reas-
sembling, 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 Thrust spring
DVD Pickup assembly
on the DVD pickup. (See Fig.19.)
(5) Pull out the lead screw. (See Fig.19.) Fig.17
Caution:
Perform adjustment after replacing the pickup. s
L.S.collar
DVD Pickup assembly Rod(M)
Lead screw
Sub shaft
r
L.S.gear
Fig.18
K
Rack spring
Lead screw
Rack plate
L.S.collar
DVD Pickup
Fig.19
1-24 (No.MA167)
3.2.10 Removing the spindle motor
(See Fig.20)
· Remove the mechanism control board.
Remove the two screws L attaching the spindle motor on the Spindle motor
bottom of the body.
Caution:
Perform adjustment when reattaching the spindle motor.
L
Fig.20
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.) Feed TRI. spring
M
(2) Remove the two screws M attaching the feed motor as- Feed motor assembly
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.)
Fig.21
Slit washer
Worm wheel
Feed motor
N Motor H. assembly
Fig.22
(No.MA167)1-25
SECTION 4
ADJUSTMENT
4.1 Test instruments required for adjustment 4.2 Standard measuring conditions
(1) Digital oscilloscope (100MHz)
Power supply voltage DC14.4V(11V to 16V)
(2) Jitter meter
(3) Frequency counter Load impedance 4 (2 Speakers connection)
(4) Digital tester Line output 20k
(5) Electric voltmeter
(6) Tracking offset meter
(7) Test Disc : VT501 or VT502
4.3 Adjustment method for jitter
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.
If the measured jitter value is outside the 12% tolerance range, perform the following adjustments.
4.3.1 Adjustment procedure
(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 screws in the cycle of abca.)
(3) After completing the adjustment, secure the screws with screw lock paint.
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
1-26 (No.MA167)
4.4 Jitter 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.
Indicated Jitter value Indicated Jitter value Indicated Jitter value Indicated Jitter value
on the LCD (%) on the LCD (%) on the LCD (%) on the LCD (%)
EF56 4.7 E972 7.6 E38E 10.5 DDAA 13.4
EF22 4.8 E93E 7.7 E35A 10.6 DD76 13.5
EEEE 4.9 E90A 7.8 E326 10.7 DD42 13.6
EEBA 5.0 E8D6 7.9 E2F2 10.8 DD0E 13.7
EE86 5.1 E8A2 8.0 E2BE 10.9 DCDA 13.8
EE52 5.2 E86E 8.1 E28A 11.0 DCA6 13.9
EE1E 5.3 E83A 8.2 E256 11.1 DC72 14.0
EDEA 5.4 E806 8.3 E222 11.2 DC3E 14.1
EDB6 5.5 E7D2 8.4 E1EE 11.3 DC0A 14.2
ED82 5.6 E79E 8.5 E1BA 11.4 DBD6 14.3
ED4E 5.7 E76A 8.6 E186 11.5 DBA2 14.4
ED1A 5.8 E736 8.7 E152 11.6 DB6E 14.5
ECE6 5.9 E702 8.8 E11E 11.7 DB3A 14.6
ECB2 6.0 E6CE 8.9 E0EA 11.8 DB06 14.7
EC7E 6.1 E69A 9.0 E0B6 11.9 DAD2 14.8
EC4A 6.2 E666 9.1 E082 12.0 DA9E 14.9
EC16 6.3 E632 9.2 E04E 12.1 DA6A 15.0
EBE2 6.4 E5FE 9.3 E01A 12.2 DA36 15.1
EBAE 6.5 E5CA 9.4 DFE6 12.3 DA02 15.2
EB7A 6.6 E596 9.5 DFB2 12.4 D9CE 15.3
EB46 6.7 E562 9.6 DF7E 12.5 D99A 15.4
EB12 6.8 E52E 9.7 DF4A 12.6 D966 15.5
EADE 6.9 E4FA 9.8 DF16 12.7 D932 15.6
EAAA 7.0 E4C6 9.9 DEE2 12.8 D8FE 15.7
EA76 7.1 E492 10.0 DEAE 12.9 D8CA 15.8
EA42 7.2 E45E 10.1 DE7A 13.0 D896 15.9
EA0E 7.3 E42A 10.2 DE46 13.1 D862 16.0
E9DA 7.4 E3F6 10.3 DE12 13.2
E9A6 7.5 E3C2 10.4 DDDE 13.3
Calculation
Indicated on the LCD Jitter value (%)
E9A6 7.5
(No.MA167)1-27
4.5 Service mode
4.5.1 Standard input/output conditions
Power supply voltage: DC14.4V (11V to 16V)
Line output: 20k
4.5.2 Service mode setting procedure
(The DVD does not need to be loaded before starting the following procedure.)
1. As the state that pushed a [STANDBY/ON] button on the main unit more than 3 seconds,
press a [RESET] button.
[STANDBY/ON] button
[RESET] button
2. Immediately, press the [MENU] key on the remote controller.
[MENU] key
3. Service menu is indicated on the monitor.
Service Mode Menu
> INITIALIZE ALL
INFORMATION
LCD SETTING
RUNNING MODE
CHECK MODE
TEMPERATURE
READ ERROR
CLEAR ERROR
INITIALIZE
MEMORY CHECK
MENU : NEXT UP/DW : ENT
Select a service mode menu with a [MENU] key on the remote controller and decide it with the [ ] or [ ] keys
on the remote controller.
1-28 (No.MA167)
4.5.3 Operation procedures
INITIALIZE ALL : All data are initialized by a state in factory shipment.
Service Mode Menu INITIALIZE ALL In clear, "NOW EXECUTING" is displayed.
> INITIALIZE ALL After clear completion, a screen returns to normal indication
INFORMATION after "OK XX" indication was displayed for 3 seconds.
LCD SETTING NOW EXECUTING
RUNNING MODE When other operation was done in clear, service mode menu
CHECK MODE is canceled immediately and returns to normal indication.
TEMPERATURE OK XX
READ ERROR Initialize data
CLEAR ERROR
INITIALIZE All EEPROM data except factory shipment value of system
MEMORY CHECK micon
MENU : NEXT UP/DW : ENT DVD unit EEPROM data except a permanent domain
Exchanging it operate a menu Learning information
of a service mode with a [MENU]
key on the remote controller.
Operate choice and execution of INFORMATION : Area/Region indication/Version indication
a menu with the [ ] or [ ] keys
INFORMATION
on the remote controller. KV-MRD900
NTSC Current color system
REGION X
JC Region number
SYS VER XXXX XX
DVD VER XXXX Area suffix
System micon version and ROM correction version
DVD version
MODE : BACK
Press the [MODE] key and a screen returns to service menu.
LCD adjustment mode
LCD SETTING NTSC LCD SETTING NTSC Current system
> COM AMPLITUDE > PHASE
COM DC CONTRAST
DAC OUT Indication TINT
RGB AMPLITUDE COLOR
BRIGHT reshuffling PICTURE
GAMMA1 INPUT MODE/SW
GAMMA2 NTSC/PAL CHANGE
SUB-BRIGHT R SETTING DISP ON/OFF
SUB-BRIGHT B
MENU : NEXT UP/DW : ENT MENU : NEXT UP/DW : ENT
MODE : EEPROM WRITE MODE : EEPROM WRITE
See "LCD adjustment" for details.
Press the [MODE] key.
LCD SETTING NTSC
EEPROM WRITE
NOW EXECUTING