JVC KDAVX-2-E, KDAVX-2-EE Service manual
SERVICE MANUAL
DVD/CD RECEIVER
MA25420064
KD-AVX2J,KD-AVX2E,KD-AVX2EU,
KD-AVX2EE,KD-AVX2U,KD-AVX2UN,
KD-AVX2A
A
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
COPYRIGHT © 2006 Victor Company of Japan, Limited
No.MA254
2006/4
SPECIFICATION
AUDIO AMPLIFIER SECTION
Power Output Only the United States 20 W RMS
Signal to Noise Ratio Only the United States 80 dBA (reference: 1 W into 4
In countries other than the United States 70 dB
Maximum Power Output In other countries Front 50 W per channel
Rear 50 W per channel
Continuous Power Output
(RMS)
Load Impedance 4
Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.5 kHz, 6.3 kHz, 15 kHz
Level ±10 dB
Line-In Level/Impedance 1.5 V/20 k
Line-Out Level/Impedance Only the United States and Southern Europe 2.5 V/20 k
Output Impedance Only the United States and Southern Europe 1 k
Subwoofer-Out Level/
Impedance
Color System Only the United States NTSC
Video Input (composite) 1 Vp-p/75
Video Output (composite) 1 Vp-p/75 Ω
Other Terminals Only the United States and Europe 2nd AUDIO OUT, CD changer, Steering wheel remote input (OE RE-
Frequency Range FM Only the United States 87.5 MHz to 107.9 MHz (with channel interval set to 100 kHz or 200
FM Tuner Usable Sensitivity 11.3 dBf (1.0
AM Tuner ( In other countries ) Sensitivity 20
MW Tuner ( In Europe ) Sensitivity 20
LW Tuner ( In Europe ) Sensitivity 50
In other countries Front 20 W per channel into 4
total harmonic distortion.
Rear 20 W per channel into 4
total harmonic distortion.
Ω (4 Ω to 8 Ω allowance)
In other countries 2.5 V/20 k
Ω
In other countries 2.5 V/20 kΩ load (full scale)
Only the United States and Southern Europe 2.0 V/20 k
In other countries 2.5 V/20 k
In Europe PAL
In other countries NTSC/PAL
MOTE)
In other countries 2nd AUDIO OUT, CD changer
TUNER SECTION
kHz)
Only the United States 87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz)
In other countries 87.5 MHz to 108.0 MHz
AM Only the United States 530 kHz to 1 710 kHz (with channel interval set to 10 kHz)
Only the United States 531 kHz to 1 602 kHz (with channel interval set to 9 kHz)
In Europe (MW) 522 kHz to 1 620 kHz
In Europe (LW) 144 kHz to 279 kHz
In other countries 531 kHz to 1 602 kHz
50 dB Quieting Sensitivity 16.3 dBf (1.8
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 35 dB
Capture Ratio 1.5 dB
µV
Selectivity 35 dB
µV
Selectivity 35 dB
µV
× 4 Channels at 4 Ω and [< or =] 1% THD+N
Ω)
Ω, 40 Hz to 20 000 Hz at no more than 0.8%
Ω, 40 Hz to 20 000 Hz at no more than 0.8%
Ω load
Ω load (full scale)
Ω load (full scale)
Ω load (full scale)
Ω load (full scale)
Ω
µV/75 Ω)
µV/75 Ω)
1-2 (No.MA254)
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 16 Hz to 22 000 Hz
DVD fs=192 kHz 16 Hz to 88 000 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 Max. Bit Rate 320 kbps
WMA Max. Bit Rate 320 kbps
MONITOR SECTION
Screen 3.5-inch wide liquid crystal panel
Number of Pixels 224 640 pixels
Drive Method TFT (Thin Film Transistor) active matrix format
Color system Only the United States NTSC
In Europe PAL
In other countries NTSC/PAL
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0
Dimensions
(W
× H × D)
Mass (approx.) 1.9 kg (4.2 lbs) (excluding accessories)
Installation Size (approx.) 182 mm
Panel Size (approx.) 188 mm
°C to +40°C (32°F to 104°F)
× 52 mm × 160 mm (7-3/16" × 2-1/16" × 6-5/16")
× 58 mm × 12 mm (7-7/16" × 2-5/16" × 1/2")
Design and specifications are subject to change without notice.
(No.MA254)1-3
1.1 Safety 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.
1-4 (No.MA254)
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 laser products.
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) 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.
1.4 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land before the flexible wire is disconnected from the connector on the pickup unit.
(If the flexible wire is disconnected without applying solder, the 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
CN101
Short-circuit points
Mechanism control board
(No.MA254)1-5
1.5 Important for laser products
!
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The 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)
1-6 (No.MA254)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.MA254)1-7
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the panel assembly
(See Fig.1)
(1) Push the button(detach) in the lower right part of the panel
assembly.
(2) Remove the panel assembly.
3.1.2 Removing the side heat sink
(See Fig.2)
Reference:
Remove the panel assembly as required.
(1) From the left side of the main body, remove the two screws
A and two screws B attaching the side heat sink.
(2) Remove the side heat sink from the main body.
Panel assembly
Button(detach)
Fig.1
A
B
Side heat sink
Fig.2
1-8 (No.MA254)
3.1.3 Removing the top chassis assembly
(See Figs.3 to 6)
• Remove the panel assembly and side heat sink.
(1) From the top side of the main body, remove the two screws
C attaching the top chassis assembly. (See Fig.3.)
(2) From the both sides of the main body, remove the two
screws D attaching the top chassis assembly. (See Figs.4
and 5.)
(3) From the back side of the main body, remove the four
screws E attaching the top chassis assembly. (See Fig.6.)
(4) Lift the top chassis assembly in the direction of the arrow.
(See Fig.6.)
(5) Take out the top chassis assembly from the main body.
Bottom chassis assembly
C
C
Top chassis assembly
Fig.3
Top chassis assembly
Bottom chassis assembly
Fig.4
Top chassis assembly
Bottom chassis assembly
Fig.5
D
D
Top chassis assembly
Fig.6
E
(No.MA254)1-9
3.1.4 Removing the front chassis assembly
(See Fig.7 and 8)
• Remove the panel assembly, side heat sink and top chassis
assembly.
(1) From the both sides of the top chassis assembly, remove
the two screws E attaching the front chassis assembly.
(See Fig.7 and 8.)
(2) Remove the front chassis assembly from the top chassis
assembly.
Top chassis assembly
Fig.7
F
Front chassis assembly
3.1.5 Removing the DVD mechanism assembly
(See Figs.9)
• Remove the panel assembly, side heat sink and top chassis
assembly.
Reference:
Remove the front chassis assembly as required.
(1) From the inside of the top chassis assembly, remove the
three screws G attaching the DVD mechanism assembly
and take out the DVD mechanism assembly.
(2) From the side of the DVD mechanism assembly, remove
the double-stick tape fixing the insulator.
(3) Remove the insulator from the top chassis assembly.
Front chassis assembly
F
Double stick tape
G
Top chassis assembly
Fig.8
G
1-10 (No.MA254)
G
DVD mechanism assembly
Fig.9
Top chassis assembly
3.1.6 Removing the connection control board
(See Fig.10)
• Remove the panel assembly, side heat sink, top chassis as-
sembly and DVD mechanism assembly.
(1) From the top side of the DVD mechanism assembly, re-
lease the lock of the connector CN965
control board and disconnect the card wire.
(2) Remove the two screws H attaching the connection control
board on the DVD mechanism assembly and remove the
connection control board.
on the connection
Connection control board
HH
CN965
DVD mechanism assembly
Fig.10
(No.MA254)1-11
3.1.7 Removing the rear bracket
(See Fig.11 to 13)
• Remove the panel assembly, side heat sink and top chassis
assembly.
(1) Remove the screw J, screw J', two screws K and screw M
attaching the rear bracket. (See Fig. 11.)
Reference:
When attaching the screw J', attach the wire holder with
it as before.
(2) Remove the screw N attaching the wire holder. (See
Fig.11.)
(3) Release the lock of the connector (CN301
, CN871, CN931) on the main board in an upward
CN861
direction. (See Fig.12.)
(4) Remove the car cable from the rear bracket. (See Fig.12.)
Note:
When attaching the car cable, do not touch the cable to
X31, IC31, TU1 and IC701 then pushing down all the cable to main board side by wire clamp. (See Fig.13.)
(5) Take out the rear bracket from the bottom chassis assem-
bly.
3.1.8 Removing the main board
(See Figs.12)
• Remove the panel assembly, side heat sink, top chassis as-
sembly and rear bracket.
(1) Release the lock of the connector CN962
board in an upward direction and disconnect the flexible
wire.
(2) Release the lock of the connector (CN881
disconnect the card wire.
(3) Remove the two screws P attaching the main board to the
bottom chassis assembly.
(4) Take out the main board from the bottom chassis assem-
bly.
, CN311, CN361,
on the main
, CN891) and
CN881
P
CN931
CN871
N
J
CN891
M
KJ'
Fig.11
Bottom chassis assembly
CN962
P
CN361
CN311
Rear bracketWire holder
Main board
CN301
CN861
IC701
TU1
X31
IC31
Main board
Fig.12
Wire clamp
Wire clamp
Fig.13
1-12 (No.MA254)
3.1.9 Removing the front door mechanism assembly
r
(See Fig.14)
• Remove the front panel assembly, side heat sink, top chassis
assembly main board and rear bracket.
(1) From the top side of the bottom chassis assembly, remove
the screw Q attaching the FPC guide to the bottom chassis.
(2) Remove the five screws R attaching the front door mecha-
nism assembly to the bottom chassis.
Reference:
When attaching the screws Q and R, apply a locking
agent them.
(3) Take out the front door mechanism assembly from the bot-
tom chassis.
Front door mechanism assembly
Bottom chassis
R
3.1.10 Removing the panel A control board and panel panel B control board
(See Figs.15 and 16)
• Remove the panel assembly.
(1) From the back side of the panel assembly, remove the six
screws S attaching the rear cover to the panel assembly.
(See Fig.15.)
(2) From the inside of the rear cover, release the lock of the
connector CN583
nect the card wire. (See Fig.16.)
(3) Remove the three screws T attaching the panel B control
board and take out the panel B control board from the rear
cover. (See Fig.16.)
Note:
Do not lose the compression spring when taking out the panel
A control board. (See Fig.16.)
on the panel A control board and discon-
S
FPC guide
R
Q
Fig.14
Rear cove
S
Fig.15
Panel A control board
CN583
Rear cover
Fig.16
Panel B control board
T
(No.MA254)1-13
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
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
1-14 (No.MA254)
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.MA254)1-15
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
1-16 (No.MA254)
Clamper unit
Clamper unit
Clamper spring
Fig.8
Fig.9
g
Notch
(No.MA254)1-17
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
1-18 (No.MA254)
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.MA254)1-19
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)
1-20 (No.MA254)
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.MA254)1-21
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
1-22 (No.MA254)
Fig.21
Slit washer
Worm wheel
Feed moto
N
Motor H. assembly
Fig.22
SECTION 4
ADJUSTMENT
4.1 Test 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 : EXTDV001-20P ×2
4.3 Connection method
Connection procedure
(1) Attach the front chassis assembly to the main board.
(2) Attach the heat sink and rear bracket to the main board.
(3) Attach the extension studs to the DVD mechanism assembly.
(4) Connect the DVD mechanism assembly and the main board with a extension cable.
STDV001-3P
4.2 Standard measuring conditions
Power supply voltage DC14.4V(11 to 16V)
Load impedance 4 Ω (2 Speakers connection)
Line Output 20K Ω
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.
EXTDV001-20P
EXTDV001-20P
STDV001-3P
STDV001-3P
(No.MA254)1-23
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