JVC THS-3 Service manual
SERVICE MANUAL
DVD DIGITAL CINEMA SYSTEM
MB18720045
TH-S3
Area suffix
A ------------------------ Australia
B ------------------------------ U.K.
E ---------- Continental Europe
EN ----------- Northern Europe
EV ------------- Eastern Europe
SP-WS3
SP-THS3F
SP-THS3F
EE -------- Russian Federation
XV-THS3
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED
No.MB187
2004/5
SPECIFICATION
Center unit (XV-THS3)
Audio section Total Harmonic Distortion 0.02%
Digital input*1 OPTICAL DIGITAL IN: -21 dBm to -15 dBm (660 nm E30 nm)
Video section Video System PAL
Horizontal Resolution 500 lines
Signal-to-Noise Ratio 64 dB (Composite signal when "RGB" is selected)
Video output level Composite: 1.0 V(p-p)/75 W
S-video-Y: 1.0 V(p-p)/75 Ω
S-video-C: 0.3 V(p-p)/75 Ω
Component-Y: 1.0 V(p-p)/75 Ω
Component-PB/PR: 0.7 V(p-p)/75 Ω
Tuner section Tuning Range FM: 87.50 MHz to 108.00 MHz
AM: 522 kHz to 1 629 kHz
General Power Requirements AC 230 V , 50 Hz
Power Consumption 75 W (at operation), 1.0 W (in standby mode)
Dimensions (W × H × D) 360 mm × 65 mm × 370 mm
Mass 5.3 kg
*1 : Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48kHz)
Front speakers (SP-THS3F)
Type 1-Way Bass-Reflex Type
(Magnetically-shielded Type)
Speaker 8.0 cm cone M 1
Power Handling Capacity 52 W
Impedance 6 Ω
Frequency Range 85 Hz to 20 000 Hz
Sound Pressure Level 82 dB/W·m
Dimensions (W × H × D) 105 mm × 118 mm × 98 mm
Mass 0.60 kg each
Center speaker (SP-THS3F)
Type 1-Way Bass-Reflex Type
(Magnetically-shielded Type)
Speaker 8.0 cm cone M 1
Power Handling Capacity 52 W
Impedance 6 Ω
Frequency Range 85 Hz to 20 000 Hz
Sound Pressure Level 82 dB/W·m
Dimensions (W × H × D) 105 mm × 118 mm × 98 mm
Mass 0.65 kg
Surround speakers (SP-THS3F)
Type 1-Way Bass-Reflex Type
(Magnetically-shielded Type)
Speaker 8.0 cm cone M 1
Power Handling Capacity 52 W
Impedance 6 Ω
Frequency Range 85 Hz to 20 000 Hz
Sound Pressure Level 80 dB/W·m
Dimensions (W × H × D) 105 mm × 118 mm × 98 mm
Mass 0.55 kg each
Subwoofer (SP-WS3)
Type 1-Way Bass-Reflex Type
(Magnetically-shielded Type)
Speaker 16.0 cm cone M 1
Power Handling Capacity 52 W
Impedance 6 Ω
Frequency Range 40 Hz to 1 800 Hz
Sound Pressure Level 85 dB/W·m
Dimensions (W × H × D) 139 mm × 350 mm × 408 mm
Mass 4.0 kg
Designs & specifications are subject to change without notice.
1-2 (No.MB187)
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.
(No.MB187)1-3
1.5 Safety Precautions (U.K only)
(1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con-
tinued 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.
(2) Any unauthorised design alterations or additions will void the manufacturer's guarantee; furthermore the manufacturer cannot
accept responsibility for personal injury or property damage resulting therefrom.
(3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never
be replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts in
the product have special safety related characteristics. These characteristics are often not evident from visual inspection. Parts
other than specified by the manufacturer may not have the same safety characteristics as the recommended replacement parts
shown in the Parts List of the Service Manual and 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 re-assembling.
1.5.1 Warning
(1) Service should be performed by qualified personnel only.
(2) This equipment has been designed and manufactured to meet international safety standards.
(3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
(4) Repairs must be made in accordance with the relevant safety standards.
(5) It is essential that safety critical components are replaced by approved parts.
(6) If mains voltage selector is provided, check setting for local voltage.
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 (No.MB187)
1.6 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.
1.6.1 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.
1.7 Handling the traverse unit (optical pickup)
(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the
replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a
time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.8 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (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 sections after connecting the flexible wire.
Short land section
Connector
Pickup
Card wire
Traverse mechanism assembly
(No.MB187)1-5
1.9 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)
1-6 (No.MB187)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.MB187)1-7
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the metal cover
(See Figs.1 to 4)
(1) From the both sides of the main body, remove the four
screws A attaching the metal cover. (See Figs.1 and 2.)
(2) From the back side of the main body, remove the five
screws B attaching the metal cover. (See Fig.3.)
(3) Lift the rear section of the metal cover in the direction of the
arrow while extending the lower sections of the metal cover, release the claws a using a longer screwdriver from the
inside as required. (See Fig.4.)
Note:
Do not damage any parts and boards inside the main body
when releasing the joints a using the longer screwdriver. (See
Fig.4.)
Metal cover
Metal cover
A
Fig.1
Metal cover
A
Fig.2
B
B B
Fig.3
Metal cover
a
Fig.4
a
1-8 (No.MB187)
3.1.2 Removing the front panel assembly
(See Figs.5 to 7)
• Remove the metal cover.
(1) From the right side of the DVD mechanism assembly, push
the slide cam and pull the tray assembly out of the main
body in the direction of the arrow. (See Fig.5.)
(2) From the front side of the main body, remove the CD fitting
assembly from the tray assembly in the direction of the arrow and push in the tray assembly as before. (See Fig.6.)
(3) From the top side of the main body, disconnect the card
wire from the connector CN428
Fig.5.)
Reference:
When reassembling, connect the card wire to the connector CN428
the lower part of the holder board. (See Fig.5.)
(4) Disconnect the card wire from the connectors CN454
the HP terminal board. (See Fig.5.)
(5) From the bottom side of the main body, remove the three
screws C attaching the front panel assembly. (See Fig.7.)
(6) From the both and bottom sides of the main body, remove
the front panel assembly in the direction of the arrow while
releasing the engagement sections b and c. (See Fig.7.)
on the main board after passing it through
on the main board. (See
on
DVD mechanism assembly
Main board
DVD mechanism
assembly
Tray assembly
CN428
Holder board
HP terminal
board
CN454
Card wire
Front panel assembly
Front panel assembly
CD fitting assembly
b b
Slide cam
Fig.5
Fig.6
C
c
Front panel assembly
Fig.7
(No.MB187)1-9
3.1.3 Removing the DVD mechanism assembly
f
(See Figs.5,6 and 8)
• Remove the metal cover.
(1) From the right side of the DVD mechanism assembly, push
the slide cam and pull the tray assembly out of the main
body in the direction of the arrow. (See Fig.5.)
(2) From the front side of the main body, remove the CD fitting
assembly from the tray assembly in the direction of the arrow and push in the tray assembly as before. (See Fig.6.)
(3) From the top side of the main body, disconnect the card
wires from the connectors (CN422
board. (See Fig.8.)
(4) Disconnect the wire from the connector CN430
board. (See Fig.8.)
(5) Remove the three screws D attaching the DVD mechanism
assembly on the chassis base. (See Fig.8.)
Reference:
When attaching the DVD mechanism assembly, align the
holes of the chassis base to the projections d of the DVD
mechanism assembly. (See Fig.8.)
3.1.4 Removing the HP terminal board
(See Fig.8)
• Remove the metal cover and front panel assembly.
(1) From the top side of the main body, remove the screw E at-
taching the HP terminal board on the chassis base.
(2) Take out the HP terminal board from the main body.
Reference:
When attaching the HP terminal board, align the hole on the
HP terminal board to the projection e of the chassis base before attaching the screw E.
to CN426) on the main
on the main
CN423
CN425
Card
wires
CN422
Wire
CN430
D
d
D
D
DVD mechanism assembly
CN424
CN426
Card wires
Fig.8
Main board
HP terminal
board
Chassis
base
e
E
3.1.5 Removing the rear panel
(See Fig.9)
• Remove the metal cover.
(1) From the back side of the main body, remove the strain re-
lief attaching the power cord in the direction of the arrow.
(2) Remove the eight screws F and two screws F’ attaching
the rear panel. [B/E/EN/EV/EE version]
(3) Remove the eight screws F attaching the rear panel. [A
version]
(4) Release the engagement sections f and remove the rear
panel from the main body.
Power cord
f
Strain relief
Rear panel
Fig.9
F'
F
F
1-10 (No.MB187)
3.1.6 Removing the tuner assembly
(See Figs.10 and 11)
• Remove the metal cover.
(1) From the top side of the main body, disconnect the card
wire from the connector CN1
Fig.10.)
(2) From the back side of the main body, remove the screw G
attaching the tuner assembly to the rear panel. (See
Fig.11.)
(3) Take out the tuner assembly from the main body.
3.1.7 Removing the scart terminal board [B/E/EN/EV/EE
version]
(See Figs.10 and 11)
• Remove the metal cover.
(1) From the top side of the main body, disconnect the card
wire from the connector CN340
(See Fig.10.)
(2) From the back side of the main body, remove the two
screws H attaching the scart terminal board to the rear panel. (See Fig.11.)
(3) Take out the scart terminal board from the main body.
on the tuner assembly. (See
on the scart terminal board.
Scart terminal board
Rear panel
CN340
Fig.10
CN1
Tuner assembly
Card wires
H
Fig.11
G
(No.MB187)1-11
3.1.8 Removing the main board
(See Figs.12 and 13)
• Remove the metal cover.
(1) From the top side of the main body, disconnect the card
wires from the connectors (CN341, CN422 to CN428) on
the main board. [B/E/EN/EV/EE version] (See Fig.12.)
(2) From the top side of the main body, disconnect the card
wires from the connectors (CN422
board. [A version] (See Fig.12.)
(3) Disconnect the wires from the connectors (CN190
CN901) on the main board. (See Fig.12.)
Reference:
After connecting the wires to the connectors (CN190
), fix the wires with the wire holder. (See Fig.12.)
CN901
(4) Disconnect the power cord and wire from the connectors
(CN950
(5) Remove the three screws J and screw J’ attaching the
main board on the chassis base. (See Fig.12.)
Reference:
(6) From the back side of the main body, remove the six
screws K attaching the main board to the rear panel. (See
Fig.13.)
(7) Release the engagement sections g and remove the rear
panel together with the scart terminal board and tuner assembly. (See Fig.13.)
(8) Take out the main board from the main body.
Reference:
When attaching the main board, align the hole on the main
board to the projections h of the chassis base before attaching
the screws J and J’. (See Fig.12.)
, CN953) on the transformer board. (See Fig.12.)
When attaching the screw J’, attach the wire holder with
it. (See Fig.12.)
to CN428) on the main
, CN430,
Transformer board
,
J
CN426
CN950
Wires
Wire holder
h
CN953
Power cord
CN424
Rear panel
CN430
CN901
J'
CN341
Fig.12
Main board
CN190
CN422
J
CN428
Card wires
J
CN425
CN423
Card wires
h
Chassis
base
Card wire
CN427
g g
Fig.13
K
1-12 (No.MB187)
3.1.9 Removing the heat sink
(See Fig.14)
• Remove the metal cover and main board.
From the reverse side of the main board, remove the four
screws L attaching the heat sink.
3.1.10 Removing the transformer board
(See Fig.15)
• Remove the metal cover.
(1) From the top side of the main body, disconnect the wires
from the connectors (CN952
board.
(2) Disconnect the power cord from the connector CN950 on
the transformer board.
(3) Remove the wire holders bundling the wires.
Reference:
After attaching the transformer board, bundle the wires
with the wire holders as before.
(4) Remove the two screws M and screw M’ attaching the
transformer board.
Reference:
When attaching the screw M’, attach the shield with it as
before.
(5) Release the holder using a pliers and take out the trans-
former board from the main body.
, CN953) on the transformer
Main board
Transformer board
Pliers, etc.
Holder
M
Wire
CN953
CN952
CN950
Fig.14
Wire holders
Power cord
M'
Fig.15
Heat sink
L
Wires
Shield
Transformer board
(No.MB187)1-13
3.1.11 Removing the power transformer
r
(See Fig.16)
• Remove the metal cover.
(1) From the top side of the main body, remove the tie bands
and wire holders bundling the wires.
(2) Disconnect the wire from the connector CN952
transformer board.
(3) Disconnect the wire from the connector CN901
board.
Reference:
After connecting the wires to the connector, bundle the
wires with the wire holders and new tie bands as before.
(4) Remove the four screws N and take out the power trans-
former from the main body.
3.1.12 Removing the fan motor
(See Figs.16 and 17)
• Remove the metal cover.
(1) From the top side of the main body, remove the wire hold-
ers bundling the wires. (See Fig.16.)
(2) Disconnect the wire from the connector CN190
board. (See Fig.16.)
(3) From the right side of the main body, remove the two
screws P and take out the fan motor from the chassis
base. (See Fig.17.)
Reference:
After connecting the wire to the connector CN190
wires with the wire holders as before. (See Fig.16.)
on the
on the main
on the main
, bundle the
Fan
Tie bands
Wire holders
N
Wire
N
Wires
CN901
Transformer board
CN952
Fig.16
Fan motor
Power transforme
N
CN190
N
Main board
P
Chassis base
Fig.17
1-14 (No.MB187)
3.1.13 Removing the front board and LED illuminate board
(See Figs.18 to 20)
• Remove the metal cover and front panel assembly.
(1) From the front side of the front panel assembly, pull out the
volume knob in the direction of the arrow. (See Fig.18.)
(2) From the inside of the front panel assembly, remove the six
screws Q attaching the front board. (See Fig.19.)
(3) Take out the front board from the front panel assembly.
Reference:
When attaching the front board, align the projections i of
the front panel assembly to the holes of the front board.
(See Fig.19.)
(4) From the forward side of the front board, disconnect the
LED illuminate board from the connector CN451
front board. (See Fig.20.)
on the
Volume knob
Q
Front panel assembly
Fig.18
Front panel assembly
Front board
Q
i
LED illuminate board
CN451
Q
i
Fig.19
Front board
Fig.20
(No.MB187)1-15
3.2 DVD mechanism section
• Remove the DVD mechanism assembly from the main body.
(See "3.1.3 Removing the DVD mechanism assembly".)
3.2.1 Removing the tray assembly
(See Figs.1 to 3)
(1) From the right side of the DVD mechanism assembly, push
the slide cam and pull the tray assembly out of the DVD
mechanism assembly in the direction of the arrow. (See
Fig.1.)
(2) From the top side of the DVD mechanism assembly, re-
move the two screws A attaching the leaf spring to the
bushing and remove the leaf spring. (See Fig.2.)
(3) Remove the bushing of the tray assembly from the projec-
tion a on the DVD mechanism assembly and move the tray
assembly in the direction of the arrow. (See Fig.3.)
(4) Remove the claw b of the tray assembly from the DVD
mechanism assembly and take out the tray assembly. (See
Fig.3.)
Tray assembly
Slide cam
Leaf spring
DVD mechanism assembly
Fig.1
Bushing
A
DVD mechanism assembly
Fig.2
Projection a
Claw b
DVD mechanism assembly
Fig.3
Bushing
Tray assembly
1-16 (No.MB187)
3.2.2 Removing the traverse mechanism assembly
(See Figs.4)
From the bottom side of the DVD mechanism assembly, remove
the three screws B and screw B’ attaching the traverse mechanism assembly and take out the DVD traverse mechanism assembly with the DVD servo board.
Reference:
When attaching the screw B’, attach the washer with it.
B'
Washer
DVD mechanism assembly
B'
3.2.3 Removing the DVD servo board
(See Figs.5 and 6)
• Remove the traverse mechanism assembly.
(1) From the side of the traverse mechanism assembly, solder
the short land sections c on the pickup. (See Fig.5.)
(2) From the bottom side of the traverse mechanism assem-
bly, release the lock of the connector CN101
servo board in the direction of the arrow 1 and disconnect
the card wire. (See Fig.6.)
Caution:
• Solder the short land sections c on the pickup before
disconnecting the card wire from the connector CN101
on the DVD servo board. If the card wire is disconnected without attaching solder, the pickup may be destroyed by static electricity. (See Figs.5 and 6.)
• When attaching the DVD servo board, be sure to remove solders from the short land sections c after connecting the card wire to the connector CN101
DVD servo board. (See Figs.5 and 6.)
(3) Disconnect the card wire from the connector CN201
DVD servo board. (See Fig.6.)
(4) Remove the two screws C attaching the DVD servo board.
(See Fig.6.)
(5) Remove the DVD servo board from the engagement sec-
tion d in an upward and remove the engagement section f
in the direction 3 while removing the engagement section e
in the direction of the arrow 2. (See Fig.6.)
on the DVD
on the
on the
B
DVD servo board
Traverse mechanism assembly
Fig.4
Short land section c
Traverse mechanism assembly
Fig.5
CN101
Card wire
d
C
1
2
1
Card wire
3
B
Pickup
CN201
C
f
e
DVD servo board
Traverse mechanism assembly
Fig.6
(No.MB187)1-17
3.2.4 Removing the pickup
(See Figs.5,7 to 9)
• Remove the traverse mechanism assembly.
(1) From the side of the traverse mechanism assembly, solder
the short land sections c on the pickup. (See Fig.5.)
(2) Release the lock of the connector on the pickup in the di-
rection of the arrow and disconnect the card wire. (See
Fig.7.)
Caution:
• Solder the short land sections c on the pickup before
disconnecting the card wire from the connector on the
pickup. If the card wire is disconnected without attaching solder, the pickup may be destroyed by static electricity. (See Figs.5 and 7.)
• When attaching the pickup, be sure to remove solders
from the short land sections c after connecting the
card wire to the connector on the pickup. (See Figs.5
and 7.)
(3) Remove the screw D attaching the plate and thrust spring.
(See Fig.7.)
(4) Remove the engagement section g attaching the plate to
the feed holder and remove the plate with the thrust spring.
(See Fig.7.)
(5) Remove the shaft of the pickup from the section h on the
traverse mechanism assembly and remove the shaft from
the section i while moving it in the direction of the arrow.
(See Fig.8.)
(6) Remove the pickup from the section j of the traverse mech-
anism assembly and take out the pickup with the shaft.
(See fig.8.)
(7) From the bottom side of the pickup, remove the two screws
E attaching the SW actuator and LEAD spring. (See Fig.9.)
(8) Pull the shaft out of the pickup. (See Fig.9.)
Plate
D
Feed holder
h
Shaft
Thrust spring
g
Card wire
Connector
Pickup
Fig.7
Traverse mechanism assembly
i
Pickup
Shaft
j
Fig.8
Pickup
SW actuator
LEAD spring
E
Fig.9
1-18 (No.MB187)
3.2.5 Attaching the pickup
(See Figs.5,7 to 10)
• See "3.2.4 Removing the pickup".
(1) Attach the shaft, SW actuator and LEAD spring to the pick-
up. (See Fig.9.)
(2) Align the pickup to the section j of the traverse mechanism
assembly first, and set the both ends of the shaft of the
pickup in the sections g and i of the traverse mechanism
assembly. (See Fig.8.)
(3) Attach the plate and thrust spring. (See Fig.7.)
(4) Remove solders from the short land sections c after con-
necting the card wire to the connector on the pickup. (See
Figs.5 and 7.)
(5) Turn the feed gear M in the direction of the arrow 1 to move
the pickup in the direction of the arrow 2. (See Fig.10.)
3.2.6 Removing the feed motor
(See Figs.7,11 and 12)
• Remove the traverse mechanism assembly.
(1) From the top side of the traverse mechanism assembly, re-
move the screw D attaching the plate and thrust spring.
(See Fig.7.)
(2) Remove the engagement section g attaching the plate to
the feed holder and remove the plate with the thrust spring.
(See Fig.7.)
(3) Remove the wires from the soldered section k on the spin-
dle motor board. (See Fig.11.)
Reference:
When attaching the feed motor, pass the wire through
the section m on the spindle base. (See Fig.11.)
(4) Remove the feed holder, feed motor, lead screw, feed gear
E and feed gear M at the same time after removing the two
screws F attaching the feed holder. (See Fig.11.)
(5) From the side of the feed holder, remove the two screws G
attaching the feed motor. (See Fig.12.)
Feed gear M
1
Feed gear M
Feed gear E
F
F
Feed holder
2
Fig.10
Feed motor
Spindle base
Spindle motor board
Fig.11
Pickup
Lead screw
Wires
Feed holder
m
k
G
Fig.12
(No.MB187)1-19
3.2.7 Removing the spindle motor board
(See Figs.11 and 13)
• Remove the traverse mechanism assembly and DVD servo
board.
(1) From the top side of the traverse mechanism assembly, re-
move the wires from the soldered section k on the spindle
motor board. (See Fig.11.)
(2) From the bottom side of the traverse mechanism assem-
bly, remove the three screws H attaching the spindle motor
board. (See Fig.13.)
3.2.8 Removing the switch board
(See Fig.14.)
(1) From the bottom side of the DVD mechanism assembly, re-
move the wires from the soldered section n on the switch
board.
(2) Lift the switch board while pressing the claw p of the DVD
mechanism assembly in the direction of the arrow and remove it from the section q.
Reference:
• Put the wires on the section r after attaching the switch
board to the DVD mechanism assembly.
• Fix the claw p on the DVD mechanism assembly with bonds
after attaching the switch board.
3.2.9 Removing the motor
(See Figs.14 and 15)
• Remove the tray assembly.
(1) From the bottom side of the DVD mechanism assembly, re-
move the wires from the soldered section n on the switch
board. (See.Fig.14.)
(2) From the top side of the DVD mechanism assembly, re-
move the belt from the motor pulley. (See Fig.15.)
Note:
Take care not to attach grease on the belt.
(3) Remove the two screws J attaching the motor to the DVD
mechanism assembly and take out the motor from the bottom side of the DVD mechanism assembly. (See Fig.15.)
Reference:
Put the wires on the section r after attaching the motor to the
DVD mechanism assembly. (See Fig.14.)
H
Switch board
Soldered
section n
q
r
DVD mechanism assembly
Traverse mechanism assembly
Fig.13
Wires
Claw p
DVD mechanism assembly
Fig.14
1-20 (No.MB187)
J
Fig.15
Belt
Motor pulley
Loading...