Jvc UX-QD70-S, UX-QD70-W Service Manual
MB496200512
SERVICE MANUAL
MICRO COMPONENT MD SYSTEM
UX-QD70S,UX-QD70W
Area suffix
UB ---------------------- Hong Kong
(SP-UXK30S)
(SP-UXK30W)
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
(CA-UXQD70S)
(CA-UXQD70W)
(SP-UXK30S)
(SP-UXK30W)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.MB496
2005/12
SPECIFICATION
MD/DVD receiver (CA-UXQD70S/CA-UXQD70W)
Amplifier Output power 20 W × 2 (10% THD/4 Ω)
Input terminals Analog AUX × 1
650 mV/47 kΩ: LEVEL1
260 mV/47 kΩ: LEVEL2
Digital Digital optical input × 1
-23 dBm to -15 dBm (Optical square terminal)
(Compatible with frequency of 32 kHz, 44.1 kHz and 48 kHz)
Output terminals Analog Speaker × 1, 20 W/4 Ω
Impedance 4 Ω - 16 Ω
Headphone (×1), 25 mW/32 Ω
Impedance 16 Ω - 1 kΩ
Digital DVD/CD optical output × 1
-23 dBm to -15 dBm (Optical square terminal)
Other AV COMPU LINK × 2 (Ø 3.5)
Tuner Frequency FM 87.50 MHz - 108.00 MHz
AM 531 kHz - 1 710 kHz (9 kHz spacing)
530 kHz - 1 710 kHz (10 kHz spacing)
DVD player Playable discs DVD VIDEO, DVD AUDIO, CD, VCD, SVCD,
CD-R/CDRW(CD, VCD, SVCD, MP3/WMA/JPEG format),
DVD-R(video format, MP3/WMA/JPEG format),
DVD-RW(video format, DVD VR format, MP3/WMA/JPEG format)
MD recorder Audio playing system MiniDisc digital audio system
Recording system Magneto-optical overwrite system
Reading system Non-contact, semiconductor laser pickup
Recording/Playback time
(when using an 80-minute MD)
Sampling frequency 44.1 kHz
Audio compression ATRAC (Adaptive TRansform
system Acoustic Coding)/ATRAC3 (MDLP)
Cassette deck Frequency response Normal (type l) 60 Hz - 14 000 Hz
General Power source AC 220 V , 50 Hz
Power consumption 55 W (at operation)
Dimensions 165 mm (W) × 200 mm (H) × 350 mm (D)
Mass (approx.) 5.1 kg
SP 80 minutes
LP2 160 minutes
LP4 320 minutes
Wow and flutter 0.15% (WRMS)
1.1 W (on standby)
1-2 (No.MB496)
Speaker (SP-UXK30S/SP-UXK30W)
System 3-way bass reflex type
Magnetically shielded type
Speakers Woofer 10 cm cone speaker × 1
Midrange 4 cm cone speaker × 1
Tweeter 1.5 cm dome speaker × 1
Power handling capacity 20 W
Impedance 4 Ω
Frequency range 56 Hz - 40 kHz
Sound pressure level 85 dB/W·m
Dimensions 135 mm (W) × 200.5 mm (H) × 213.5 mm (D)
Mass (approx.) 2.1 kg (1 unit)
Micro component MD system (UX-QD70S/UX-QD70W)
Dimensions 435 mm (W) × 200.5 mm (H) × 350 mm (D)
Mass (approx.) 9.3 kg
U.S. and foreign patents licensed from Dolby Laboratories.
Design and specification are subject to change without notice.
(No.MB496)1-3
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purposes. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be performed by qualified personnel only.
(2) Alterations of the design or circuitry of the product should
not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the 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 directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).
• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000Ω 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 ex-
posed 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 responsibility of the repairer to ensure that
these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant
safety standards.
(4) It is essential that safety critical components are replaced
by approved parts.
(5) If mains voltage selector is provided, check setting for local
voltage.
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.
1-4 (No.MB496)
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 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 palate
(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.
1.6 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.
(No.MB496)1-5
1.7 Attention when pickup unit is removed
r
1.7.1 Attention when MD pickup unit is removed
*Please refer to "DISASSEMBLY" in the text.
(1) Apply solder to short land section before the flexible wire is disconnected from the connector CN310 on the MD servo control
board.
(If the flexible wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)
(2) In the assembly, be sure to remove solder from the short land section after connecting the flexible wire.
MD servo control board
MD servo control board
CN310
Short land section
Flexible wire
Pickup
(3) Apply solder to short land section before the flexible wire is disconnected from the connector on the pickup.
(If the flexible wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)
(4) In the assembly, be sure to remove solder from the short land section after connecting the flexible wire.
Pickup
Short land section
Flexible wire
1.7.2 Attention when DVD pickup unit is removed
*Please refer to "DISASSEMBLY" in the text.
(1) Apply solder to short land sections before the card wire is disconnected from the connector on the pickup.
(If the card wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)
(2) In the assembly, be sure to remove solder from the short land sections after connecting the card wire.
Short land sections
Pickup
Card wire
Connecto
1-6 (No.MB496)
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 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
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
CLASS 1
LASER PRODUCT
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
CAUTION : Visible and Invisible
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)
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)
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
(No.MB496)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-8 (No.MB496)
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the rear cover(B)
(See Figs.1 and 2)
(1) From the back side of the main body, remove the twelve
screws A attaching the rear cover(B). (See Fig.1.)
(2) From the bottom side of the main body, remove the three
screws B attaching the rear cover(B). (See Fig.2.)
(3) Remove the rear cover(B) from the main body.
A
Rear cover(B)
B
A AA
Fig.1
Rear cover(B)
Fig.2
(No.MB496)1-9
3.1.2 Removing the side panels (L)/(R)
(See Fig.3)
• Remove the rear cover(B).
(1) From the bottom side of the main body, remove the two
screws C attaching the side panels (L)/(R).
(2) Slide the side panels (L)/(R) in the direction of the arrow
and remove the side panels (L)/(R).
3.1.3 Removing the top cover assembly
(See Figs.4 and 5)
• Remove the rear cover(B) and side panels(L)/(R).
(1) From the left side of the main body, disconnect the card
wires from the connectors (CN703
board. (See Fig.4.)
(2) Remove the screw D attaching the top cover assembly.
(See Fig.4.)
(3) From the right side of the main body, disconnect the card
wire from the connector CN105
Fig.5.)
(4) Disconnect the wire from the connector CN108
board. (See Fig.5.)
(5) From the both sides of the main body, remove the two
screws E attaching the top cover assembly. (See Figs.4
and 5.)
(6) Release the joints a and remove the top cover assembly.
(See Figs.4 and 5.)
, CN709) on the micon
on the main board. (See
on the main
Side panel (R)
C
Side panel (L)
C
Fig.3
Top cover assembly
a
ED
Micon boardCN703 CN709
1-10 (No.MB496)
E
Fig.4
Top cover assembly
a
CN105
Main board
Fig.5
CN108
3.1.4 Removing the front panel assembly
(See Figs.6 to 8)
• Remove the rear cover(B), side panels(L)/(R) and top cover
assembly.
(1) From the left side of the main body, disconnect the card
wires from the connectors (CN702
board. (See Fig.6.)
(2) From the both sides and bottom sides of the main body, re-
lease the joints b and joint c. (See Figs.6 to 8.)
(3) Remove the front panel assembly in the direction of the ar-
row. (See Fig 8.)
, CN710) on the micon
Front panel assembly
CN702
CN710
Micon board
Front panel assembly
c
b
Fig.6
b
Fig.7
Front panel assembly
Fig.8
(No.MB496)1-11
3.1.5 Removing the fan motor
(See Figs.9 and 10)
• Remove the rear cover(B), side panels(L)/(R) and top cover
assembly.
(1) From the back side of the top cover assembly, remove the
screw F attaching the fan motor. (See Fig.9.)
(2) Take out the fan motor.
Reference:
When attaching the fan motor, pass the wire through the slot
d. (See Fig.10.)
3.1.6 Removing the tuner and tuner bracket
(See Figs.9 and 10)
• Remove the rear cover(B), side panels(L)/(R) and top cover
assembly.
(1) From the back side of the top cover assembly, remove the
two screws G attaching the tuner bracket. (See Fig.9.)
(2) From the inside of the top cover assembly, remove the
screw H attaching the tuner bracket. (See Fig.10.)
(3) Take out the tuner with the tuner bracket.
Fan motor
F
Tuner bracket
G
Fig.9
3.1.7 Removing the cassette mechanism assembly
(See Fig.10)
• Remove the rear cover(B), side panels(L)/(R) and top cover
assembly.
(1) From the inside of the top cover assembly, remove the four
screws J attaching the cassette mechanism assembly.
(2) Remove the cassette mechanism assembly.
Top cover assembly
Shield
J
J
H
JJ
1-12 (No.MB496)
Tuner
Tuner bracket
d
Cassette mechanism assembly
Fig.10
3.1.8 Removing the heat sink(B)
(See Fig.11)
• Remove the rear cover(B), side panels(L)/(R) and top cover
assembly.
(1) From the back side of the main body, remove the three
screws K and two screws M attaching the heat sink(B).
(2) Remove the heat sink(B) from the main body.
3.1.9 Removing the heat sink bracket
(See Figs.11 and 12)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly and heat sink(B).
(1) From the back side of the main body, remove the two
screws N attaching the heat sink bracket. (See Fig.11.)
(2) From the top side of main body, remove the screw P at-
taching the heat sink bracket to the regulator board.(See
Fig.12)
(3) Take out the heat sink(B) from the main body.
K
Heat sink bracket
Heat sink(B)
M
3.1.10 Removing the main board
(See Figs.12 and 13)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly and heat sink(B).
(1) From the forward side of the main board, disconnect the
card wire from the connector CN107
(2) From the right side of the main body, remove the four
screws Q attaching the main board. (See Fig.13.)
(3) Disconnect the connectors (CN101
CN110) on the main board toward this side. (See Fig.13.)
(4) From the forward side of the main board, disconnect the
wires from the connectors (CN109
Fig.13.)
. (See Fig.12.)
to CN103, CN106 and
and CN111). (See
CN107
CN103 CN102
Fig.11
Fig.12
CN 111
Main board
CN101
N
P
CN110
CN109
Main board
CN106
QQ
Fig.13
(No.MB496)1-13
3.1.11 Removing the regulator board
(See Fig.14)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly, heat sink(B) and main board.
(1) From the top side of the main body, disconnect the wire
from the connector CN902
(2) Disconnect the wire from the connector CN807
board.
(3) Remove the two screws R attaching the regulator board.
(4) Take out the regulator board from the main body.
Reference:
After reassembling, bundle the wire with the new tie band as
before.
3.1.12 Removing the trans board
(See Fig.15)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly, heat sink(B), main board and regulator board.
(1) Disconnect the wire from the connector CN903
board.
(2) Disconnect the power cord from the connector CN901
the trans board.
(3) Remove the three screws S attaching the power transform-
er and take out the trans board from the main body.
Reference:
After reassembling, bundle the wire with the new tie band as
before.
on the trans board.
on the joint
on the trans
on
CN902
Joint board
Trans board
CN903
CN807
S
R
Fig.14
CN901
R
Trans board
Regulator board
Video board
Power cord
3.1.13 Removing the jack board and video board
(See Fig.15)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly, heat sink(B), main board and regulator board.
(1) Remove the screw T attaching the jack board and take out
the jack board with the video board.
S T
Jack board
Fig.15
1-14 (No.MB496)
3.1.14 Removing the power transformer
(See Fig.16)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly, heat sink(B), main board, regulator board and trans
board.
(1) From the reverse side of the trans board, remove the sol-
ders from the sections e on the trans board.
(2) Remove the power transformer from the trans board.
3.1.15 Removing the joint board
(See Fig.17)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly, heat sink(B), main board, regulator board and trans
board.
(1) From the back side of the main body, remove the two
screws U attaching the joint board.
(2) Remove the connector CN805
micon board toward this side.
(3) From the forward side of the joint board, disconnect the
card wires from the connectors (CN801
joint board.
(4) Take out the joint board from the main body.
on the joint board from the
to CN804) on the
e
Joint board
CN803
Fig.16
CN805
Trans board
Micon board
UU
CN802
CN801
Fig.17
(No.MB496)1-15
CN804
3.1.16 Removing the MD mechanism assembly
(See Figs.18 to 20)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly, front panel assembly, heat sink(B) and main board.
(1) From the both side of the main body, remove the four
screws V attaching the MD mechanism assembly. (See
Figs.18 and 19.)
(2) From the top of the main body, disconnect the card wire
from the connector CN803
(3) Take out the MD mechanism assembly from the main
body.
3.1.17 Removing the MD holder
(See Fig 20)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly, front panel assembly, heat sink(B), main board and
MD mechanism assembly.
(1) From the top side of the main body, remove the shield(MD).
(2) Remove the two screws W and screw X attaching the MD
holder to the micon board.
(3) Take out the MD holder from main body.
on the joint board. (See Fig.20)
MD mechanism assembly
V
Fig.18
MD mechanism assembly
MD holder
Shield(MD)
X
V
W
Fig.19
W
Fig.20
Micon board
CN803
Joint board
1-16 (No.MB496)
3.1.18 Removing the micon board
(See Fig.21)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly, front panel assembly, heat sink(B), main board, MD
mechanism assembly, MD holder and regulator board.
(1) Disconnect the wire from the connector CN903
board. (See Fig.21.)
(2) Disconnect the card wires from the connectors (CN705
) on the micon board. (See Fig.21.)
CN711
(3) Disconnect the micon board from the connector CN805
the joint board. (See Fig.21.)
(4) Take out the micon board from the main body.
3.1.19 Removing the CD mechanism bracket
(See Fig.22)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly, heat sink(B), heat sink bracket, main board, regulator
board, trans board and joint board.
(1) From the top side of the main body, disconnect the wires
from the connectors (CN705
board.
(2) Remove the four screws Y attaching the CD mechanism
bracket.
(3) Take out the CD mechanism bracket from the main body.
and CN711) on the micon
on the trans
and
on
Y
Micon board
Fig.21
CN705CN711
Y
Trans board
CN903CN705CN711 CN805
Micon board
Y
CD mechanism bracket
Fig.22
(No.MB496)1-17
3.1.20 Removing the DVD mechanism assembly
(See Fig.23)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly, heat sink(B), main board, regulator board, trans
board, CD mechanism bracket and joint board.
(1) From the top side of the main body, remove the screw Z at-
taching the DVD mechanism assembly.
(2) Take out the DVD mechanism assembly from the main
body.
Note:
When removing the DVD mechanism assembly, be careful not
to damage the lower board and parts.
3.1.21 Removing the LCD board
(See Fig.24)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly and front panel assembly.
(1) From the inside of the front panel assembly, remove the
three screws AA attaching the LCD board.
(2) Take out the LCD board from the front panel assembly.
Note:
When attaching the LCD board, be careful not to damage the
LCD panel.
AA
Z
DVD mechanism assembly
Fig.23
LCD board
1-18 (No.MB496)
Fig.24
3.1.22 Removing the key board
(See Fig.25)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly and front panel assembly.
(1) From the inside of the front panel assembly, remove the
five screws AB attaching the key board.
(2) Take out the key board from the front panel assembly.
Key board
AB
3.1.23 Removing the headphone board
(See Fig.26)
• Remove the rear cover(B), side panels(L)/(R), top cover as-
sembly, heat sink(B), main board, regulator board, trans
board, joint board, CD mechanism bracket and DVD mechanism assembly.
(1) From the top side of the main body, remove the screw AC
attaching the headphone board.
(2) Take out the headphone board from the main body.
Fig.25
AC
Headphone board
Fig.26
(No.MB496)1-19
3.2 DVD mechanism assembly
• Remove the DVD mechanism assembly from main body.
(Refer the Disassembly method)
3.2.1 Removing the DVD cover
(See fig.1 and 2)
(1) Remove the two screws A attaching the DVD cover from
top side of DVD mechanism assembly. (See fig.1)
(2) Remove the card wire from the connector CN4
assembly. (See fig.1)
(3) Remove the DVD cover.
Caution:
The spring which presses down a card wire is attached to the
DVD cover. Please do not let me lose a spring.
on the LED
A
CN4
A
DVD cover
DVD cover
Fig.1
Spring
Fig.2
LED assembly
1-20 (No.MB496)
3.2.2 Removing the tray assembly
(See fig.3 and 4)
• Remove the DVD cover.
(1) From the right-hand side of a DVD mechanism assembly,
a slide cam is pushed and a tray assembly is pulled out in
the direction of an arrow. (See fig.3)
(2) Remove the two screws B attaching the tray assembly
form the upper surface of a DVD mechanism assembly.
(See fig.4)
(3) Bushing of a tray assembly is removed from the projection
part a of a DVD mechanism, and a tray assembly is removed. (See fig.4)
Tray assembly DVD mechanism assembly
Slide cam
Fig.3
Projection part a
B
Projection part a
Fig.4
Tray assembly
(No.MB496)1-21
3.2.3 Removing the LED assembly
(See fig. 5)
• Remove the DVD cover and tray assembly.
(1) From the upper surface of a tray assembly, the double-sid-
ed tape which has attached the LED assembly is removed,
and a LED board is removed.
3.2.4 Removing the traverse mechanism assembly
(See fig.6)
• Remove the DVD cover.
(1) Remove the four screws C attaching the traverse mecha-
nism assembly form bottom surface of the DVD mechanism.
(2) Remove the traverse mechanism and DVD servo board to-
gether.
Tray assembly
Fig.5
Traverse mechanism assembly
LED assemblyDouble face tape
DVD servo board
1-22 (No.MB496)
CC
Fig.6
3.2.5 Removing the DVD servo board
(See fig.7 and 8)
• Remove the DVD cover and traverse mechanism.
(1) The short land section b of a pickup is soldered. (See fig.7)
Caution:
• Please solder to the short land section b of a pickup
before removing a card wire from the connector
of a DVD servo board.
CN101
If a card wire is removed without soldering, a pickup
may be destroyed by static electricity. (See fig.7 and 8)
• At the time of DVD servo board attachment, please remove the solder of the short land section b of a pickup
after attaching a card wire in a connector CN101
fig.7 and 8)
(2) The lock of connector CN101
moved in the direction of an arrow, and a card wire is removed. (See fig.8)
(3) Remove the two screws D attaching the DVD servo board
from bottom surface of traverse mechanism assembly.
(See fig.8)
(4) Remove the card wire from connector CN201
board. (See fig.8)
(5) A DVD servo board is raised from the connection part c,
and it removes in the direction of an arrow from hook d.
(See fig.8)
of a DVD servo board is re-
of DVD servo
. (See
b
Traverse mechanism assembly
Card wire
D
DVD pickup
Fig.7
CN101 CN201
Card wire
c
d
DVD servo board
D
Traverse mechanism assembly
Fig.8
(No.MB496)1-23
3.2.6 Removing the pickup
(See fig.7 to 11)
• Remove the DVD cover and traverse mechanism assembly.
(1) The short land section b of a pickup is soldered. (See fig.7)
Caution:
• Please solder to the short land section b of a pickup
before removing a card wire from the connector of
pickup.
If a card wire is removed without soldering, a pickup
may be destroyed by static electricity. (See fig.7 and 9)
• At the time of pickup attachment, please remove the
solder of the short land section b of a pickup. (See fig.7
and 9)
(2) Remove the card wire from connector of pickup. (See fig.9)
(3) From the upper surface of traverse mechanism, remove
the one screw E attaching the feed bracket from part e.
(See fig.9)
(4) A trust spring is removed from hook f and a trust spring is
removed in the direction of an arrow. (See fig.9)
(5) From the g section of a traverse mechanism assembly, the
guide shaft of a DVD pickup is moved in the direction of an
arrow, and it removes from the h section. (See fig.10)
(6) From the j section of a traverse mechanism assembly, a
pickup is removed and a pickup is removed together with a
shaft. (See fig.10)
(7) Remove the tow screws F attaching the lock arm and lock
arm spring. (See fig.10)
(8) Remove the shaft from pickup. (See fig.11)
g
Guide chaft
DVD pickup
Traverse mechanism assembly
Rod spring
h
j
Fig.10
DVD pickup
Feed bracket
E
Trust spring
e
Card wire
f
Trust spring
Connector
Lock arm
Guide shaft
F
Lock arm spring
Fig.11
DVD pickup
1-24 (No.MB496)
Fig.9
3.2.7 Attaching the pickup
(See fig.9 to 12)
• Refer the "Removing the pickup".
(1) Attach the guide shaft, lock arm and lock arm spring to
DVD pickup. (See fig.11)
(2) A pickup is united with the j section of a traverse mecha-
nism assembly, and the both ends of a pickup shaft are attached in the g section and the h section. (See fig.10)
Reference:
When attaching a guide shaft in the h section, it puts into
the bottom of a rod spring.
(3) Attach the trust spring and feed bracket. (See fig.9)
(4) The solder of the short land section b of a pickup is re-
moved after attaching a card wire in the connector of a
pickup. (See fig.7)
(5) A screw shaft gear is turned in the direction 1 of an arrow,
and until full movement of the pickup is made to carry out
in the direction 2 of an arrow. (See fig.12)
3.2.8 Removing the feed motor
(See fig.9 and 13)
• Remove the DVD cover and traverse mechanism assembly.
(1) Remove the one screw E attaching the feed bracket is re-
moved from the upper surface of a traverse mechanism assembly, and a feed bracket is removed from the e section.
(See fig.9)
(2) A trust spring is removed from hook f and a trust spring is
removed in the direction of an arrow. (See fig.13)
(3) Remove the yellow wire and white wire from soldered sec-
tion k of spindle motor board. (See fig.13)
Reference:
Attaching the feed motor, the wire through the part m of
spindle base. (See fig.13)
(4) The screw shaft shift to direction of the arrow.
(5) Remove the one screw G attaching the feed motor from
side surface of traverse mechanism assembly. (See fig.13)
(6) Remove the feed motor. (See fig.13)
Screw shaft gear
DVD pickup
Fig.12
G
Rod spring
Screw shaft
Wire
m
k
Spindle moter board
Traverse mechanism assembly
Fig.13
(No.MB496)1-25
3.2.9 Removing the spindle motor board
(See fig.13 and 14)
• Remove the DVD cover, traverse mechanism assembly and
DVD servo board.
(1) Remove the yellow wire and white wire from soldered sec-
tion k of spindle motor board. (See fig.13)
(2) Remove the three screws H attaching the feed motor
board. (See fig.14)
Reference:
• When attach the spindle motor board, card wire through the
part n of the traverse mechanism assembly. (See fig.14)
• When attach the screw H, apply grew. (See fig.14)
Traverse mechanism assembly
n
H
3.2.10 Removing the switch board
(See fig.15)
(1) Remove the wire attaching the soldered section of switch
board on part p of switch board from bottom surface of
DVD mechanism.
(2) Remove the one screw J attaching the switch board.
(3) A switch board is raised pushing the hook of a DVD mech-
anism assembly in the direction of an arrow, and it removes
from the r section.
Reference:
Wire hook to part s after switch board attach to DVD mechanism.
3.2.11 Removing the motor
(See fig.15 and 16)
• DVD cover and tray assembly.
(1) Remove the wire attach to part p of switch board from bot-
tom surface of DVD mechanism assembly. (See fig.15)
(2) Remove the belt of motor pulley from top surface of DVD
mechanism. (See fig.16)
Caution:
Be careful not to make grease adhere to a belt.
(3) Remove the two screws K attaching the motor to DVD
mechanism assembly, remove the motor from bottom surface of DVD mechanism assembly. (See fig.16)
Reference:
Wire hook to part s after motor attached DVD mechanism.
(See fig.15)
Spindle motor
board
Switch board
p
H
wire
J
r
s
DVD mechanism assembly
DVD mechanism assembly
Motor Pulley
Fig.14
q
Tray assembly
Fig.15
J
Belt
1-26 (No.MB496)
K
Fig.16
3.3 MD mechanism assembly
• Remove the MD mechanism assembly from main body.
(Refer to "Removing the MD mechanism assembly" of main unit.)
3.3.1 Removing he MD servo control board
(See fig.1 and 2)
(1) Remove the card wire from connector CN408
control board, and then remove the flexible wire from connector CN407
(2) Remove the wire of head assembly from soldered section
a of MD servo control board. (See fig.1)
(3) Remove the two screws A attaching the MD servo control
board. (See fig.1)
(4) Shift the MD servo control board to direction the arrow,
then remove the MD servo control board from fixing point
b. (See fig.1)
(5) Solder the short land section of the pickup. (See fig.2)
(6) Remove the flexible wire from connector CN310
side of MD servo control board, and then remove the MD
servo control board. (See fig.2)
Caution:
• Please solder to the short land section of a pickup before re-
moving a flexible wire from the connector of a MD servo control board. If a card wire is removed without soldering, a
pickup may be destroyed by static electricity. (See fig.2)
• At the time of MD servo control board attachment, please re-
move the solder of the short land section of a pickup after attaching a flexible wire in a connector CN310
. (See fig.1)
on MD servo
on bottom
. (See fig.2)
AA
Soldered
section a
CN408
CN407
Fixing part b Fixing part b
MD servo control board
Fig.1
MD servo control board
CN310
Pickup
Short land section
Fig.2
(No.MB496)1-27
3.3.2 Removing the mecha cover
(See fig.3)
(1) Remove the four screws B attaching the mecha cover.
(2) Remove the hook from fixing part c of the internal loading
assembly.
(3) Shift the mecha cover to front side, and then remove to up-
per direction.
3.3.3 Removing the head lifter
(See fig.4 to 6)
(1) Remove the spring from hook d of main body. (See fig.4)
Reference:
• Spring can be removed in the state where it was attached, to head lifter.
• Spring is removed from head lifter if needed.
(2) Shift the head lifter to direction the arrow, and then discon-
nect the fixing part e. (See fig.5)
(3) Remove the spring from the head lifter, and then remove
the head lifter. (See fig.6)
Fixing part c
Hook
Fixing part c
Head lifter
B
Mecha cover
B
Fig.3
Spring
Fixing part e
Head lifter
Hook d
Fig.4
Spring
Fixing part e
Fig.5
1-28 (No.MB496)
Head lifter
Spring
Fig.6
3.3.4 Removing the head assembly
(See fig.7 and 8)
• Remove the MD servo control board.
(1) Remove the wire from head assembly to fixed bottom part
of pickup. (See fig.7)
(2) Remove the screw C attaching the head assembly. (See
fig.8)
Caution:
When you attach a head assembly, please fix the wire from a
head assembly to a pickup. When fix a wire, please attach a
pickup by most inside of position. And confirm the pickup
pushed rest switch. (See fig.7)
Rest switch
Pickup
Wire
Fig.7
Head assembly
C
Fig.8
(No.MB496)1-29
3.3.5 Removing the loading assembly and traverse mechanism assembly
(See fig.9 and 10)
• Remove the MD servo control board, mecha cover, head lifter
and head assembly.
(1) Remove the three screws D attaching the loading assem-
bly from upper side of main body. (See fig.9)
(2) Shift the loading assembly to front side, and then discon-
nect the fixing part f of traverse mechanism assembly.
(See fig.9)
(3) Remove the loading assembly to upper side, and then re-
move the traverse mechanism from the single flame. (See
fig.10)
D
D
Loading assembly
Fixing part f
D
Fig.9
Loading assembly
Traverse mechanism assembly
1-30 (No.MB496)
Single frame
Fig.10
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