JVC TH-S33 User manual

SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.MB393
2005/5
DVD DIGITAL CINEMA SYSTEM
MB39320055
TH-S33,TH-S11
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
Area suffix
B ------------------------------ U.K.
E ---------- Continental Europe
EN ----------- Northern Europe
EV ------------- Eastern Europe
EE -------- Russian Federation
(SP-THS11F)(SP-THS11C) (SP-THS11S)
(SP-WS33)
(SP-WS11)
(XV-THS33,XV-THS11)
(SP-THS33F)
(SP-THS33C) (SP-THS33S)

1-2 (No.MB393)
SPECIFICATION
Center unit (XV-THS33/XV-THS11)
Front speakers (SP-THS33F)
Center speaker (SP-THS33C)
Surround speakers (SP-THS33S)
Audio section Front/Center/Surround 33 W per channel, RMS at 6 Ωat 1 kHz, with 10 % total harmonic distortion.
Subwoofer 40 W, RMS at 4 Ωat 100 Hz, with 10% total harmonic distortion.
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 Ω
S-video-Y:1.0 V(p-p)/75 Ω
S-video-C:0.3 V(p-p)/75 Ω
RGB: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 100 W (at operation)
1.3 W (in standby mode)
Dimensions (W ×H ×D) 360 mm ×65 mm ×370 mm
Mass 5.3 kg
Type 1-Way Bass-Reflex Type (Magnetically-shielded Type)
Speaker 5.5 cm cone ×1
Power Handling Capacity 35 W
Impedance 6 Ω
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 75 dB/W·m
Dimensions (W ×H ×D) 230 mm ×1 102 mm ×260 mm
Mass 3.2 kg each
Dimensions (W ×H ×D) 129 mm ×284 mm ×337 mm
Mass 3.0 kg
Type 1-Way Bass-Reflex Type (Magnetically-shielded Type)
Speaker 5.5 cm cone ×2
Power Handling Capacity 35 W
Impedance 6 Ω
Frequency Range 95 Hz to 20 000 Hz
Sound Pressure Level 81 dB/W·m
Dimensions (W ×H ×D) 220 mm ×84 mm ×88.5 mm
Mass 0.97 kg
Type 1-Way Bass-Reflex Type
Speaker 5.5 cm cone ×1
Power Handling Capacity 35 W
Impedance 6 Ω
Frequency Range 105 Hz to 20 000 Hz
Sound Pressure Level 75 dB/W·m
Dimensions (W ×H ×D) 83 mm ×131 mm ×93.5 mm
Mass 0.50 kg each

(No.MB393)1-3
Subwoofer (SP-WS33)
Front speakers (SP-THS11F)
Center speaker (SP-THS11C)
Surround speakers (SP-THS11S)
Subwoofer (SP-WS11)
Designs & specifications are subject to change without notice.
Type 1-Way Bass-Reflex Type
Speaker 16.0 cm cone M 1
Power Handling Capacity 40 W
Impedance 4 Ω
Frequency Range 30 Hz to 150 Hz
Sound Pressure Level 75 dB/W·m
Dimensions (W ×H ×D) 129 mm ×284 mm ×337 mm
Mass 3.3 kg
Type 1-Way Bass-Reflex Type (Magnetically-shielded Type)
Speaker 8.0 cm cone ×1
Power Handling Capacity 33 W
Impedance 6 Ω
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 84 dB/W·m
Dimensions (W ×H ×D) 92 mm ×101 mm ×95 mm
Mass 0.58 kg each
Type 1-Way Bass-Reflex Type (Magnetically-shielded Type)
Speaker 8.0 cm cone M 1
Power Handling Capacity 33 W
Impedance 6 Ω
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 85 dB/W·m
Dimensions (W ×H ×D) 92 mm ×101 mm ×95 mm
Mass 0.65 kg
Type 1-Way Bass-Reflex Type
Speaker 8.0 cm cone ×1
Power Handling Capacity 33 W
Impedance 6 Ω
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 82 dB/W·m
Dimensions (W ×H ×D) 92 mm ×101 mm ×95 mm
Mass 0.56 kg each
Type 1-Way Bass-Reflex Type
Speaker 15.0 cm cone ×1
Power Handling Capacity 40 W
Impedance 4 Ω
Frequency Range 40 Hz to 1 800 Hz
Sound Pressure Level 84 dB/W·m
Dimensions (W ×H ×D) 129 mm ×284 mm ×337 mm
Mass 3.0 kg

1-4 (No.MB393)
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. 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 per-
formed 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 characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice 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 charac-
teristics 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 reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna 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, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent 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, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W 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.).
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 pre-
forming 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)
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE

(No.MB393)1-5
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. Replace-
ment 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.

1-6 (No.MB393)
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.
(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.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
Traverse mechanism assembly
DVD pickup

(No.MB393)1-7
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.
REPRODUCTION AND POSITION OF LABELS
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)
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)
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
CLASS 1
LASER PRODUCT
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)
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)
WARNING LABEL

1-8 (No.MB393)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MB393)1-9
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 Aattaching the metal cover. (See Figs.1 and 2.)
(2) From the back side of the main body, remove the five
screws Battaching 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 cov-
er, release the claws ausing 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 claws ausing the longer screwdriver. (See
Fig.4.)
Fig.1
Fig.2
Fig.3
Fig.4
A
Metal cover
A
Metal cover
B B
B
Metal cover
a
Metal cover
a

1-10 (No.MB393)
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 ar-
row 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 CN400 on the main board. (See
Fig.5.)
(4) Disconnect the card wire from the connector CN510 on the
HP terminal board. (See Fig.5.)
(5) From the bottom side of the main body, remove the three
screws Cattaching the front panel assembly. (See Fig.7.)
(6) From both sides and back side of the main body, remove
the front panel assembly in the direction of the arrow while
releasing the joints b. (See Fig.7.)
3.1.3 Removing the DVD mechanism assembly
(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
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 CN403 to CN405 on the main
board. (See Fig.8.)
(4) Remove the three screws Dattaching the DVD mechanism
assembly to the chassis base. (See Fig.8.)
3.1.4 Removing the HP terminal board
(See Fig.8)
• Remove the metal cover.
Reference:
Remove the front panel assembly as required. (See 3.1.2 "Re-
moving the front panel assembly".)
(1) From the top side of the main body, remove the screw Eat-
taching the HP terminal board to the chassis base.
(2) Disconnect the card wires from the connectors CN510 on
the HP terminal board. (See Fig.8.)
(3) 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 cof the chassis base be-
fore attaching the screw E.
Fig.5
Fig.6
Slide cam
DVD mechanism
assembly
Tray assembly
Front panel assembly
CN510
HP terminal board
CN400
Main board
DVD mechanism assembly
Front panel assembly
CD fitting assembly

(No.MB393)1-11
Fig.7
Fig.8
b b
C
Front panel assembly
HP terminal board
Chassis base
CN405
CN510
CN403
CN404
Card wires
DVD mechanism assembly
E
D
c

1-12 (No.MB393)
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 seven screws Fattaching the rear panel to the
main body.
(3) Release the joints d, and remove the rear panel from the
main body.
Fig.9
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 on the tuner assembly. (See
Fig.10.)
(2) From the back side of the main body, remove the two
screws Gattaching 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
(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 CN300 on the scart terminal board.
(See Fig.10.)
(2) From the back side of the main body, remove the two
screws Hattaching the scart terminal board to the rear pan-
el. (See Fig.11.)
(3) Take out the scart terminal board from the main body.
Fig.10
Fig.11
Rear panel
F
F
Strain relief
Power cord
d d
Scart terminal board Tuner assembly
CN300
CN1
Card wires
G
HG

(No.MB393)1-13
3.1.8 Removing the power amp.boards
(See Figs.12 and 13)
• Remove the metal cover and scart terminal board.
(1) From the top side of the main board, remove the three
screws Jattaching the heat sink. (See Fig.12.)
(2) Disconnect the wire from the connector CN100 on the main
board. (See Fig.8.)
(3) Disconnect the each power amp.boards connecters from
the connectors CN271, CN276, CN281 on the main board.
(See Fig.12.)
Reference:
When attaching the heat sink with power amp.boards,
confirm the connectors CN281, CN276 and CN271 al-
ready lock before attaching the screws J.
(4) Take out the heat sink with power amp.boards from the
main board. (See Fig.12.)
(5) Remove the two screws K, two screws Mand two screws
Nattaching the heat sink. (See Fig.13.)
(6) Remove the each power amp.boards from the heat sink.
Fig.12
Fig.13
Power amp. board
Heat sink
CN276
CN281
CN271
CN100 Main board
Heat sink
J
Heat sink
K
K
Power amp. board
(CEN & SW)
M
M
Power amp. board
(SL & SR)
N
N
Power amp. board
(FL & FR)

1-14 (No.MB393)
3.1.9 Removing the main board
(See Figs.14 and 15)
• Remove the metal cover, scart terminal board and heat sink
with power amp. boards.
(1) From the top side of the main body, disconnect the card
wires from the connectors CN400, CN401 and CN403 to
CN405, on the main board. (See Fig.14.)
(2) Disconnect the wires from the connectors CN102, CN950
on the main board. (See Fig.14.)
Reference:
After connecting the wires, fix the wires with the wire
clamp.
(3) Remove the two screws Pattaching the main board to the
chassis base. (See Fig.14.)
(4) From the back side of the main body, remove the two
screws Qattaching the main board to the rear panel. (See
Fig.15.)
(5) Take out the main board from the main body.
Fig.14
Fig.15
3.1.10 Removing the transformer board
(See Fig.16)
• Remove the metal cover.
(1) From the top side of the main body, disconnect the wires
from the connectors CN950, CN952 on the transformer
board.
(2) Disconnect the wires from the connectors CN101 on the
main board.
(3) Remove the three screws Rattaching the transformer
board.
(4) Take out the transformer board from the main body.
Fig.16
CN950 CN401
CN102 CN400
CN405
CN403
CN404
Wire clamp
P
P
Rear panel Q
Power cord
Transformer board
CN950
CN952
CN101
R
R

(No.MB393)1-15
3.1.11 Removing the power transformer
(See Fig.17)
• Remove the metal cover.
(1) From the top side of the main body, remove the tie bands
and wire clamp bundling the wires.
(2) Disconnect the wire from the connector CN952 on the
transformer board.
(3) Disconnect the wire from the connector CN102 on the main
board.
Reference:
After connecting the wires to the connectors, bundle the
wires with the wire clamps and new tie bands as before.
(4) Remove the four screws Sand take out the power trans-
former from the main body.
Fig.17
3.1.12 Removing the front board
(See Figs.18 and 19)
• 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 Tattaching the front board. (See Fig.19.)
(3) Take out the front board from the front panel assembly.
Fig.18
Fig.19
Transformer board Main board
Tie
bands
Power transformer
CN952 CN102
Wire clamp
S
S
S
Front panel assembly
Volume knob
Front board Front panel assembly
T

1-16 (No.MB393)
3.2 DVD mechanism section
• Remove the DVD mechanism assembly from the main body.
3.2.1 Removing the traverse mechanism assembly
(See Fig.1)
From the bottom side of the DVD mechanism assembly, remove
the four screws Aattaching the traverse mechanism assembly
and take out the traverse mechanism assembly with the DVD
module board.
Fig.1
AA
DVD module board
Traverse mechanism assembly
DVD mechanism assembly

(No.MB393)1-17
3.2.2 Removing the DVD module board
(See Figs.2 and 3)
• Remove the traverse mechanism assembly.
(1) From the side of the traverse mechanism assembly, solder
the short land sections aon the DVD pickup. (See Fig.2.)
(2) From the bottom side of the traverse mechanism assem-
bly, release the lock of the connector CN101 on the DVD
module board in the direction of the arrow and disconnect
the card wire. (See Fig.3.)
Caution:
• Solder the short land sections aon the DVD pickup be-
fore disconnecting the card wire from the connector
CN101 on the DVD module board. If the card wire is
disconnected without attaching solder, the DVD pick-
up may be destroyed by static electricity. (See Figs.2
and 3.)
• When attaching the DVD module board, be sure to re-
move solders from the short land sections aafter con-
necting the card wire to the connector CN101 on the
DVD module board. (See Figs.2 and 3.)
(3) Disconnect the card wire from the connector CN201 on the
DVD module board. (See Fig.3.)
(4) Remove the two screws Battaching the DVD module
board. (See Fig.3.)
(5) Remove the DVD module board from the engagement sec-
tion bin an upward and remove the engagement section c
in the direction of the arrow. (See Fig.3.)
Fig.2
Fig.3
Traverse mechanism assembly
DVD pickup
a
Card wire
CN101 CN201
Card wire
b
c
B
B
DVD module board
Traverse mechanism assembly

1-18 (No.MB393)
3.2.3 Removing the DVD pickup
(See Figs.2,4 to 6)
• Remove the traverse mechanism assembly.
(1) From the side of the traverse mechanism assembly, solder
the short land sections aon the DVD pickup. (See Fig.2.)
(2) Release the lock of the connector on the DVD pickup in the
direction of the arrow and disconnect the card wire. (See
Fig.4.)
Caution:
• Solder the short land sections aon the DVD pickup be-
fore disconnecting the card wire from the connector on
the DVD pickup. If the card wire is disconnected with-
out attaching solder, the DVD pickup may be de-
stroyed by static electricity. (See Figs.2 and 4.)
• When attaching the DVD pickup, be sure to remove
solders from the short land sections aafter connecting
the card wire to the connector on the DVD pickup.
(See Figs.2 and 4.)
(3) Remove the screw Cand remove the feed bracket from the
sections d. (See Fig.4.)
(4) Release the claw eof the thrust spring in the direction of
the arrow and remove the thrust spring. (See Fig.4.)
(5) Remove the guide shaft of the DVD pickup from the section
fon the traverse mechanism assembly and remove the
guide shaft from the section gwhile moving it in the direc-
tion of the arrow. (See Fig.5.)
(6) Remove the DVD pickup from the section hof the traverse
mechanism assembly and take out the DVD pickup with
the guide shaft. (See fig.5.)
(7) From the bottom side of the DVD pickup, remove the two
screws Dattaching the rack arm and rack arm spring. (See
Fig.6.)
(8) Pull the guide shaft out of the DVD pickup. (See Fig.6.)
Fig.4
Fig.5
Fig.6
Thrust spring
e
Thrust spring
DVD pickup
Connector
Feed bracket
Card wire
C
Traverse mechanism assembly
DVD pickup
Guide shaft
f
g
h
Torsion spring
DVD pickup
Rack arm
Rack arm spring
D
Guide shaft

(No.MB393)1-19
3.2.4 Attaching the DVD pickup
(See Figs.2,4 to 7)
• See "3.2.3 Removing the DVD pickup".
(1) Attach the guide shaft, rack arm and rack arm spring to the
DVD pickup. (See Fig.6.)
(2) Align the DVD pickup to the section hof the traverse mech-
anism assembly first, and set the both ends of the guide
shaft of the DVD pickup in the sections fand gof the
traverse mechanism assembly. (See Fig.5.)
Reference:
When attaching the guide shaft to the section g, attach it
under the rod spring. (See Fig.5.)
(3) Attach the feed bracket and thrust spring. (See Fig.4.)
(4) Remove solders from the short land sections aafter con-
necting the card wire to the connector on the DVD pickup.
(See Figs.2 and 4.)
(5) Turn the screw shaft gear in the direction of the arrow 1 to
move the DVD pickup fully in the direction of the arrow 2.
(See Fig.7.)
Fig.7
1
22
Screw shaft gear
DVD pickup

1-20 (No.MB393)
3.2.5 Removing the feed motor
(See Figs.4,8 and 9)
• Remove the traverse mechanism assembly.
(1) From the top side of the traverse mechanism assembly, re-
move the screw Cand remove the feed bracket from the
sections d. (See Fig.4.)
(2) Release the claw eof the thrust spring in the direction of
the arrow and remove the thrust spring. (See Fig.4.)
(3) Remove the wires from the soldered section jon the spin-
dle motor board. (See Fig.8.)
Reference:
• When attaching the feed motor, pass the wire through
the section kon the traverse mechanism assembly.
(See Fig.8.)
• Pass the wire through the lower section of the rod
spring. (See Fig.8.)
(4) Remove the screw shaft in the direction of the arrow. (See
Fig.8.)
(5) From the side of the traverse mechanism assembly, re-
move the screw Eattaching the feed motor. (See Fig.8.)
(6) Take out the feed motor from the traverse mechanism as-
sembly.
3.2.6 Removing the spindle motor board
(See Figs.8 and 9)
• Remove the traverse mechanism assembly and DVD module
board.
(1) From the top side of the traverse mechanism assembly, re-
move the wires from the soldered section jon the spindle
motor board. (See Fig.8.)
(2) From the bottom side of the traverse mechanism assem-
bly, remove the three screws Fattaching the spindle motor
board. (See Fig.9.)
Reference:
• When attaching the spindle motor board, pass the wire
through the section mon the traverse mechanism assembly.
(See Fig.9.)
• After attaching the screws F, apply bond as before.
Fig.8
Fig.9
Spindle motor board
Screw shaft Wires
k
j
Traverse mechanism assembly
Rod spring
E
Traverse mechanism assembly
F
m
F
Spindle motor
board