JVC TH-S5 User manual

SERVICE MANUAL
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED No.MB180
2004/4
DVD DIGITAL CINEMA SYSTEM
MB18020044
TH-S5, TH-S51
TABLE OF CONTENTS
1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29
Area suffix
B ------------------------------- U.K.
TH-S51
Area suffix
B ------------------------------- U.K.
E ----------- Continental Europe
EN ------------ Northern Europe
EV -------------- Eastern Europe
TH-S5
TH-S5 TH-S51

1-2 (No.MB180)
SPECIFICATION
Center unit (XV-THS5/XV-THS51)
*1 : This value is measured at System cord CONNECTOR for reference.
*2 : Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz)
Subwoofer (SP-PWS5/SP-PWS51)
Satellite Speakers
Designs & specifications are subject to change without notice.
Audio section Total Harmonic Distortion 0.02%*1
Digital input*2 DIGITAL IN (OPTICAL):-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 Ω
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
RGB:0.7 V(p-p)/75 Ω
Tuner section Tuning Range FM:87.50 MHz to 108.00 MHz
AM (MW):522 kHz to 1 629 kHz
General Power Requirements AC 230 V , 50 Hz
Power Consumption 18 W (at operation)
2.0 W (in standby mode)
Dimensions (W ×H ×D) 435 mm ×57 mm ×319 mm
Mass 3.0 kg
Amplifier section Front/Center/Surround 80 W per channel, RMS at 6 Ω(Center/Surround)/120 W per channel, RMS at 4 Ω
(Front) at 1 kHz, with 10 % total harmonic distortion.
Subwoofer 120 W, RMS at 4 Ωat 100 Hz, with 10 % total harmonic distortion.
Speaker section Speaker unit 16 cm Bass-reflex, Magnetically Shielded
Frequency Range 30 Hz to 200 Hz
General Power Requirements AC 230 V , 50 Hz
Power Consumption 110 W (at operation)
0 W (in standby mode)
Dimensions (W ×H ×D) 170 mm ×412 mm ×444 mm
Mass 12.0 kg
Front speakers (SP-THS5F) Speakers Woofer:8.0 cm
Tweeter:1.5 cm Bass-reflex, Magnetically Shielded
Power Handling Capacity 120 W
Impedance 4 Ω
Frequency Range 90 Hz to 20 kHz
Dimensions (W ×H ×D) 106 mm ×139.5 mm ×102 mm
Mass 0.67 kg
Surround speakers (SP-THS5S) Speakers 8.0 cm
Bass-reflex, Magnetically Shielded
Power Handling Capacity 80 W
Impedance 6 Ω
Frequency Range 90 Hz to 20 kHz
Dimensions (W ×H ×D) 106 mm ×119.5 mm ×102 mm
Mass 0.51 kg
Center Speaker (SP-THS5C) Speakers Woofer:8.0 cm
Tweeter:1.5 cm Bass-reflex, Magnetically Shielded
Power Handling Capacity 80 W
Impedance 6 Ω
Frequency Range 90 Hz to 20 kHz
Dimensions (W ×H ×D) 137.5 mm ×105 mm ×108 mm
Mass 0.67 kg

(No.MB180)1-3
SECTION 1
PRECAUTIONS
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

1-4 (No.MB180)
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.

(No.MB180)1-5
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
Pickup
Short land section c

1-6 (No.MB180)
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

(No.MB180)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-8 (No.MB180)
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the top cover
(See Figs.1 to 3)
(1) From the both sides of the main body, remove the four
screws Aattaching the top cover. (See Figs.1 and 2)
(2) From the back side of the main body, remove the three
screws Battaching the top cover. (See Fig.3)
(3) Lift the rear section of the top cover upward while extend-
ing the lower sections of the top cover. (See Fig.3)
Fig.1
Fig.2
Fig.3
A
Top cover
ATop cover
BTop cover

(No.MB180)1-9
3.1.2 Removing the front panel assembly
(See Figs.4 and 5)
• Prior to performing the following procedures, remove the top
cover.
(1) From the top side of the main body, disconnect the parallel
wires from the connectors CN451 and CN452 on the main
board. (See Fig.4)
(2) Remove the screw Cattaching the earth wire to the main
board. (See Fig.4)
Reference:
When attaching the screw C, attach the earth wire with
it. (See Fig.4)
(3) From the bottom side of the main body, remove the four
screws Dattaching the front panel assembly. (See Fig.5)
(4) Remove the front panel assembly in the direction of the ar-
row while releasing the joint a. (See Fig.5)
Fig.4
Fig.5
3.1.3 Removing the rear panel
(See Fig.6)
• Prior to performing the following procedures, remove the top
cover.
(1) From the back side of the main body, remove the four
screws E, screw Fand ten screws Gattaching the rear
panel.
Fig.6
C
CN452
Earth wire
Front panel assembly
CN451
Main board
DD
Joint a
Front panel assembly
E
G
Rear panel
FG

1-10 (No.MB180)
3.1.4 Removing the DSP board
(See Figs.7 and 8)
• Prior to performing the following procedures, remove the top
cover.
(1) From the back side of the main body, remove the screw F
and three screws Hattaching the DSP board to the rear
panel. (See Fig.7)
(2) From the top side of the main body, remove the screw Jat-
taching the DSP board to the main body. (See Fig.8)
(3) Take out the DSP board, and disconnect the card wires
from the connectors CN441 and CN442 on the DSP board.
(See Fig.8)
3.1.5 Removing the tuner
(See Figs.7 and 9)
• Prior to performing the following procedures, remove the top
cover and DSP board.
(1) From the back side of the main body, remove the two
screws Kattaching the tuner to the rear panel. (See Fig.7)
(2) From the top side of the main body, disconnect the card
wire from the connector CN410 on the main board. (See
Fig.9)
(3) Take out the tuner from the main body.
3.1.6 Removing the DVD mechanism assembly
(See Fig.9)
• Prior to performing the following procedures, remove top cover
and DSP board.
(1) From the top side of the main body, disconnect the card
wires from the connectors CN401 to CN403, CN408 and
CN409 on the main board.
(2) Remove the three screws Lattaching the DVD mechanism
assembly on the main body.
(3) Take out the DVD mechanism assembly to the upward di-
rection.
Note:
When attaching the DVD mechanism assembly, connect the
card wires to the connectors at first.
Fig.7
Fig.8
Fig.9
F
H
K
J
CN441 CN442
DSP board
M

(No.MB180)1-11
3.1.7 Removing the power board
(See Figs.10 and 11)
• Prior to performing the following procedures, remove the top
cover.
(1) From the back side of the main body, remove the screw M
attaching the power board to the rear panel. (See Fig.10)
(2) From the top side of the main body, disconnect the parallel
wires from the connectors CN404 to CN407 on the main
board. (See Fig.11)
(3) Remove the three screws Nattaching the power board.
(See Fig.11)
(4) Take out the power board from the main body.
Reference:
Remove the rear panel as required. (See "3.1.3 Removing the
rear panel")
Fig.10
Fig.11
3.1.8 Removing the main board
(See Fig.12)
• Prior to performing the following procedures, remove the top
cover, rear panel, DSP board and tuner.
(1) From the top side of the main body, disconnect the card
wires from the connectors CN401 to CN403, CN408,
CN409, CN451 and CN452 on the main board.
(2) Disconnect the parallel wires from the connectors CN404
to CN407 on the main board.
(3) From the top side of the main body, remove the three
screws Pattaching the main board on the main body.
(4) Take out the main board from the main body.
Fig.12
Tuner
L L
L
CN410
CN402CN409
CN403CN401
Main board
CN408
DVD mechanism assembly
CN404 CN406
CN405 CN407
Main board
Power board
N
P
CN404 CN452 CN451
CN406
CN405
CN407
CN401
CN409 CN402
CN403
Main board
PCN408

1-12 (No.MB180)
3.2 Front panel assembly section
• Prior to performing the following procedures, remove the top
cover and front panel assembly.
3.2.1 Removing the FL board
(See Fig.1)
(1) From the inside of the front panel assembly, remove the
screw Aattaching the FL board.
(2) Take out the FL board from the front panel assembly.
Reference:
• When attaching the FL board, align the section a of the front
panel assembly to the right side of the FL board.
• After attaching the FL board, passing the card wire through
the Hook b.Fig.1
3.2.2 Removing the SW board
(See Figs.2 to 3)
(1) From the front side of the front panel assembly, remove the
volume jog from the front panel assembly forward.
(2) From the inside of the front panel assembly, release the
seven claws cattaching the front cover.
(3) Remove the front cover to the direction of the arrow.
(4) Remove the three screws Battaching the SW board, and
take out the SW board.
Fig.2
Fig.3
AHooks b
FL board Section a
Volume jog Front assembly
B
Claws c
SW board Front cover

(No.MB180)1-13
3.3 DVD mechanism section
• Remove the DVD mechanism assembly from the main body.
(See "3.1.6 Removing the DVD mechanism assembly".)
3.3.1 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 Aattaching 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 aon the DVD mechanism assembly and move the tray
assembly in the direction of the arrow. (See Fig.3.)
(4) Remove the claw bof the tray assembly from the DVD
mechanism assembly and take out the tray assembly. (See
Fig.3.)
Fig.1
Fig.2
Fig.3
Tray assembly DVD mechanism assembly
Slide cam
Bushing
Leaf spring
A
DVD mechanism assembly
Bushing
Claw b
Projection a
Tray assembly
DVD mechanism assembly

1-14 (No.MB180)
3.3.2 Removing the traverse mechanism assembly
(See Figs.4)
(1) From the bottom side of the DVD mechanism assembly, re-
move the four screws Battaching the traverse mechanism
assembly and take out the DVD traverse mechanism as-
sembly with the DVD servo board.
Fig.4
3.3.3 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 con the pickup. (See Fig.5.)
(2) From the bottom side of the traverse mechanism assem-
bly, release the lock of the connector CN101 on the DVD
servo board in the direction of the arrow 1 and disconnect
the card wire. (See Fig.6.)
Caution:
• Solder the short land sections con the pickup before
disconnecting the card wire from the connector CN101
on the DVD servo board. If the card wire is disconnect-
ed without attaching solder, the pickup may be de-
stroyed by static electricity. (See Figs.5 and 6.)
• When attaching the DVD servo board, be sure to re-
move solders from the short land sections cafter con-
necting the card wire to the connector CN101 on the
DVD servo board. (See Figs.5 and 6.)
(3) Disconnect the card wire from the connector CN201 on the
DVD servo board. (See Fig.6.)
(4) Remove the two screws Cattaching the DVD servo board.
(See Fig.6.)
(5) Remove the DVD servo board from the engagement sec-
tion din 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.)
Fig.5
Fig.6
DVD mechanism assembly
Traverse mechanism assembly
DVD servo board
BB
Traverse mechanism assembly
Pickup
Short land section c
Card wire Card wire
DVD servo board
Traverse mechanism assembly
CN101
CN201
11
23
C
C
f
e
d

(No.MB180)1-15
3.3.4 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 con 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 con the pickup before
disconnecting the card wire from the connector on the
pickup. If the card wire is disconnected without attach-
ing solder, the pickup may be destroyed by static elec-
tricity. (See Figs.5 and 7.)
• When attaching the pickup, be sure to remove solders
from the short land sections cafter connecting the
card wire to the connector on the pickup. (See Figs.5
and 7.)
(3) Remove the screw Dattaching the plate and thrust spring.
(See Fig.7.)
(4) Remove the engagement section gattaching 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 hon the
traverse mechanism assembly and remove the shaft from
the section iwhile moving it in the direction of the arrow.
(See Fig.8.)
(6) Remove the pickup from the section jof 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
Eattaching the SW actuator and LEAD spring. (See Fig.9.)
(8) Pull the shaft out of the pickup. (See Fig.9.)
Fig.7
Fig.8
Fig.9
Thrust spring
Pickup
Connector
Plate
Card wire
Feed holder
D
g
Shaft
Pickup
Traverse mechanism assembly
h
i
j
Pickup
SW actuator
LEAD spring
E
Shaft

1-16 (No.MB180)
3.3.5 Attaching the pickup
(See Figs.5,7 to 10)
• See "3.3.4 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 jof the traverse mechanism
assembly first, and set the both ends of the shaft of the
pickup in the sections gand iof 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 cafter 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.)
Fig.10
3.3.6 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 Dattaching the plate and thrust spring.
(See Fig.7.)
(2) Remove the engagement section gattaching 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 kon the spin-
dle motor board. (See Fig.11.)
Reference:
When attaching the feed motor, pass the wire through
the section mon 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 Fattaching 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.)
Fig.11
Fig.12
Feed gear M
Pickup
1
2
Spindle motor board
Spindle base
Feed holder
Feed gear E
Feed gear M
Feed motor
Lead screw
Wires
F
F
m
k
Feed holder
G

(No.MB180)1-17
3.3.7 Removing the spindle motor board
(See Figs.11 and 13)
• Remove the traverse mechanism assembly.
• Remove the DVD servo board.
(1) From the top side of the traverse mechanism assembly, re-
move the wires from the soldered section kon the spindle
motor board. (See Fig.11.)
(2) From the bottom side of the traverse mechanism assem-
bly, remove the three screws Hattaching the spindle motor
board. (See Fig.13.)
Fig.13
3.3.8 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 non the switch
board.
(2) Lift the switch board while pressing the claw pof the DVD
mechanism assembly in the direction of the arrow and re-
move it from the section q.
Reference:
• Put the wires on the section rafter attaching the switch
board to the DVD mechanism assembly.
• Fix the claw pon the DVD mechanism assembly with bonds
after attaching the switch board.
3.3.9 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 non 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 Jattaching the motor to the DVD
mechanism assembly and take out the motor from the bot-
tom side of the DVD mechanism assembly. (See Fig.15.)
Reference:
Put the wires on the section rafter attaching the motor to the
DVD mechanism assembly. (See Fig.14.)
Fig.14
Fig.15
Traverse mechanism assembly
H
Switch board
Wires
Soldered
section n
Claw p
q
r
DVD mechanism assembly
DVD mechanism assembly
J
Belt
Motor pulley

1-18 (No.MB180)
3.4 Speaker section
3.4.1 Removing the amplifier assembly
(See Figs.1 to 3)
(1) From the back side of the speaker main body, remove two
screws Aattaching the amplifier assembly. (See Fig.1)
(2) From the bottom side of the speaker main body, remove
the eight screws Battaching amplifier assembly. (See
Fig.2)
(3) From the left side of the speaker main body, move the am-
plifier assembly backward and disconnect the wire from the
connector CN274 on the mother board. (See Fig.3)
Reference:
After connecting the wire to the connector CN274 on the moth-
er board, bundle the wire by the wire clamp. (See Fig.3)
Fig.1
Fig.2
Fig.3
Amplifier
assembly
A
B
Speaker main body B
Wire clampMother board
CN274
Amplifier assembly Speaker main body

(No.MB180)1-19
3.4.2 Removing the rear panel
(See Figs.4 and 5)
• Prior to performing the following procedures, remove the am-
plifier assembly.
(1) From the back side of the amplifier assembly, remove the
four screws C, two screws Dand screw Eattaching the rear
panel. (See Fig.4)
(2) From the top side of the amplifier assembly, take out the
rear panel with fan motor, and disconnect the wire from the
connector CN371 on the mother board. (See Fig.5)
3.4.3 Removing the fan motor
(See Figs.4 and 5)
• Prior to performing the following procedures, remove the am-
plifier assembly.
(1) From the back side of the rear panel, remove the two
screws Fattaching the fan motor. (See Fig.4)
(2) From the top side of the amplifier assembly, take out the
fan motor and disconnect the wire from the connector
CN371 on the mother board. (See Fig.5)
Fig.4
Fig.5
Rear panel
F
C
E
CD
Mothe
r
board
CN371
Fan motor

1-20 (No.MB180)
3.4.4 Removing the heat sink BKT (See Figs.6 and 7)
• Prior to performing the following procedures, remove the am-
plifier assembly and rear panel.
(1) From the left side of the amplifier assembly, remove the
wires from the wire clamp on the heat sink BKT. (See Fig.6)
(2) From the left side of the amplifier assembly, remove the
four screws Gattaching the heat sink BKT. (See Fig.7)
(3) Take out the two heat sink BKT.
Reference:
After attaching the heat sink BKT, bundle the wire by the wire
clamp. (See Fig.6)
Fig.6
Fig.7
3.4.5 Removing the mother board
(See Figs.8 and 9)
• Prior to performing the following procedures, remove the am-
plifier assembly, rear panel and heat sink BKT.
(1) From the top side of the amplifier assembly, remove the
two screws Hattaching the mother board. (See Fig.8)
(2) From the left side of the amplifier assembly, disconnect the
wires from the connectors CN102 and CN151 on the moth-
er board. (See Fig.9)
(3) Disconnect the power cord from the connector CN101 on
the mother board, and take out the power cord. (See Fig.9)
(4) Disconnect the mother board from the connector CN271,
CN272 and CN273 on the amp. board, and take out the
mother board assembly from the amplifier assembly. (See
Fig.9) Fig.8
Fig.9
Heat sink BKT Wire
Amplifer assembly
Wire clamp
Wire
Mother board
G G
Mother board
Mother board
H H
CN151
CN273
CN102
Mother board
CN101
CN272 CN271
Power cord
Amplifier assembly
Wires