JVC TH-M45 - Progressive Scan Home Theater... User manual

SERVICE MANUAL
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED No.MB033
2003/11
DVD DIGITAL CINEMA SYSTEM
MB033200310 TH-M45
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-39
Area suffix
B ------------------------------- U.K.
E ----------- Continental Europe
EN ------------ Northern Europe
XV-THM45 SP-PWM45
SP-THM45C SP-THM45F SP-THM45F SP-THM45S SP-THM45S

1-2 (No.MB033)
SPECIFICATION
Design and specifications are subject to change without notice.
Center unit
Audio section
Total Harmonic Distortion 0.02%
NOTE : This value is measured at System cord CONNECTOR for reference.
Audio input sensitivity/
Impedance (at 1 kHz) Analog input AUX IN 290 mV/47 kΩ
Digital input* DIGITAL IN (OPTICAL) -21 dBm to -15 dBm (660 nm ±30 nm)
*CorrespondingtoLinearPCM,DolbyDigital,andDTSDigitalSurround(withsamplingfrequency -32kHz,44.1kHz,48kHz)
Video section
Color System PAL
Horizontal Resolution 500 lines
Signal-to-Noise Ratio
(Composite signal when "RGB"
is selected)
64 dB
Video output level Composite 1.0 V(p-p)/75 Ω
S-video-Y 1.0 V(p-p)/75 Ω
S-video-C 0.286 V(p-p)/75 Ω
Tuner section
Tuning Range FM 87.5 MHz to 108.0 MHz
AM (MW) 522 kHz to 1629 kHz
General
Power Requirements AC 230 V, 50 Hz
Power Consumption 20 W (at operation), 1.6 W (in standby mode)
Dimensions (W ×H ×D) 400 mm ×85 mm ×386 mm
Mass 4.6 kg Subwoofer
Amplifier section
Front/Center/Surround 80 W per channel, RMS at 6 Ωat 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 150 W (at operation), 0 W (in standby mode)
Dimensions (W ×H ×D) 216 mm ×353 mm ×485 mm
Mass 12.0 kg Satellite Speakers
Front speakers (SP-THM45F)
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) 103 mm ×115 mm ×100 mm
Mass 0.64 kg
Surround speakers (SP-THM45S)
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) 103 mm ×115 mm ×100 mm
Mass 0.52 kg Center speaker
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) 103 mm ×115 mm ×100 mm
Mass 0.64 kg Accessories
Remote control (1), Batteries (2), FM antenna (1), AM (MW) loop antenna (1), Power cord (1), System cord (1)
Speaker codes
5 m For satellite (front left/right) and center speakers (3)
10 m For satellite speakers (surround left/right) (2) (The length of the above speaker cords are approximate.)

(No.MB033)1-3
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety 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)
0.15 F AC TYPE

1-4 (No.MB033)
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.MB033)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 DVD players.
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 DVD pickup unit.
• Apply solder to the short circuit points before the flexible wire is disconnected from the connector on the DVD pickup.
(If the flexible wire is disconnected without applying solder, the DVD 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
DVD pickup
DVD changer mechanism assembly
Short circuit points

1-6 (No.MB033)
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 compact disc 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 de
feated. 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 herein 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.

(No.MB033)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-8 (No.MB033)
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the metal cover
(See Figs.1 to 4)
(1) From the right and left 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 three
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 joints a using a longer screwdriver.
Fig.1
Fig.2
Fig.3
Fig.4
Metal cover
A
Metal cover
A
Metal cove
r
Rear panel
B
Metal cover
Claws aClaws a

(No.MB033)1-9
3.1.2 Removing the front panel assembly
(See Figs.5 and 6)
• Remove the metal cover.
(1) From the top side of the main body, disconnect the parallel
wires from the connectors (CN408, CN409) on the main
board. (See Fig.5.)
(2) Disconnect the card wires from the connectors (CN407,
CN412) on the main board. (See Fig.5.)
(3) Remove the screw Cattaching the earth wire to the main
board. (See Fig.5.)
(4) From the bottom side of the main body, remove the three
screws Dattaching the front panel assembly. (See Fig.6.)
(5) Release the two hooks band hook cfrom the both and bot-
tom sides of the main body, and remove the front panel as-
sembly in the direction of the arrow. (See Figs.5 and 6.)
Fig.5
Fig.6
CN407
CN412
CN409
CN408 Hook b
Hook b
Main board
C
Card wire
Earth
wire
Parallel wires
Front panel assembly
Card wire
Hook c
Front panel
assembly
D

1-10 (No.MB033)
3.1.3 Removing the DVD changer mechanism assembly
(See Fig.7)
• Remove the metal cover.
• Remove the front panel assembly.
(1) From the top side of the main body, disconnect the card
wires from the connectors (CN405, CN415) on the main
board.
(2) Remove the four screws Eattaching the DVD changer
mechanism assembly to the chassis base.
(3) Take out the DVD changer mechanism assembly in an up-
ward direction.
Note:
When attaching the screw E, fit the hole of the DVD changer
mechanism assembly to the bosses don the chassis base.
Fig.7
3.1.4 Removing the rear panel
(See Fig.8)
• Remove the metal cover.
(1) From the back side of the main body, remove the screw F,
nine screws Gand three screws Hattaching the rear panel.
Fig.8
Main board
Boss d
Boss d
CN405
CN415
Bottom chassis
DVD changer mechanism
assembly
Card wires
E
E
E
FG
G
HH
HRear panel

(No.MB033)1-11
3.1.5 Removing the audio & digital input board
(See Figs.9 and 10)
• Remove the metal cover.
(1) From the top side of the main body, disconnect the card
wire from the connector CN401 on the audio & digital input
board. (See Fig.9.)
(2) Remove the screw Jattaching the audio & digital input
board. (See Fig.9.)
(3) From the back side of the main body, remove the screw K
and two screws Lattaching the audio & digital input board
to the rear panel. (See Fig.10.)
(4) Take out the audio & digital input board from the main
body.
3.1.6 Removing the tuner
(See Figs.9 and 10)
• Remove the metal cover.
(1) From the top side of the main body, disconnect the card
wire from the connector CN1 on the tuner. (See Fig.9.)
(2) From the back side of the main body, remove the two
screws Mattaching the tuner to the rear panel. (See
Fig.10.)
(3) Take out the tuner from the main body.
3.1.7 Removing the power supply board
(See Figs.9 and 10)
• Remove the metal cover.
(1) From the top side of the main body, disconnect the parallel
wires from the connectors (CN401 to CN404) on the main
board. (See Fig.9.)
(2) Remove the three screws Nattaching the power supply
board. (See Fig.9.)
(3) From the back side of the main body, remove the screw P
attaching the power supply board to the rear panel. (See
Fig.10.)
(4) Take out the power supply board from the main body.
Reference:
Remove the rear panel as required. (See Fig.8.)
Fig.9
Fig.10
CN401
CN402
CN1 CN403
CN404
Tuner
A
udio & Digital input board
Main board
N
J
Power supply board
Parallel wires
CN401
Card
wires
N
KL M P
Rear panel

1-12 (No.MB033)
3.1.8 Removing the main board
(See Figs.11 to 13)
• Remove the metal cover.
(1) From the top side of the main body, disconnect the card
wires from the connectors (CN405, CN407, CN410 to
CN412, CN415) on the main board (See Fig.11.)
(2) Disconnect the parallel wires from the connectors (CN401 to
CN404, CN408, CN409) on the main board. (See Fig.11.)
(3) Remove the screw Qattaching the audio & digital input
board. (See Fig.11.)
(4) From the back side of the main body, remove the five
screwsRand three screws Sattaching the rear panel. (See
Fig.12.)
(5) Take out the rear panel together the audio & digital input
board and tuner.
(6) From the top side of the main body, remove the screw T
and two screws Uattaching the main board to the chassis
base. (See Fig.13.)
Note:
When attaching the screw T, attach the earth wire of the front
panel assembly at the same time.
Fig.11
Fig.12
Fig.13
CN411
CN412
CN402
CN407
CN409
CN408
CN410 CN403
CN404
Tuner
Audio & Digital input board
Main board
Q
CN401 CN405
CN415
SS
S
R
Rear panel
Main board
T
U
U
Earth wire Front panel assembly
Bottom chassis

(No.MB033)1-13
3.1.9 Removing the connect board
(See Fig.14)
• Remove the metal cover.
• Remove the front panel assembly.
(1) From the inside of the front panel assembly, disconnect the
card wire from the connector CN561 on the connect board.
(2) Remove the screw Vattaching the support board.
(3) Take out the connect board.
3.1.10 Removing the phone jack board
(See Fig.14)
• Remove the metal cover.
• Remove the front panel assembly.
(1) From the inside of the front panel assembly, remove the
two screws Wattaching the phone jack board.
(2) Take out the phone jack board. Fig.14
3.1.11 Removing the operation board
(See Fig.15)
• Remove the metal cover.
• Remove the front panel assembly.
• Remove the support board.
(1) Remove the two screws Xattaching the operation board.
(2) Take out the operation board together the Button(top).
Reference:
Remove the Button(top) from the front board as required.
3.1.12 Removing the front board
(See Figs.15 and 16)
• Remove the metal cover.
• Remove the front panel assembly.
• Remove the connect board.
• Remove the operation board.
(1) From the front side of the front panel assembly, pull out the
volume knob. (See Fig.16.)
(2) Remove the screw Yattaching the front board. (See
Fig.16.)
(3) From the inside of the front panel assembly, remove the
eight screws Zattaching the front board. (See Fig.15.)
(4) Take out the front board while releasing the claws ein the
direction of the arrow. (See Fig.15.)
Fig.15
Fig.16
CN561 Connect board
Card wire
Support board
Phone jack board
W
W
V
Operation board
Button(top)
Claws e
X
Z
ZZ
Front board
Front panel assembly
Volme knob
Y

1-14 (No.MB033)
3.1.13 Removing the illumination board
(See Figs.17 and 18)
(1) Open the door assembly of the front panel assembly and
remove the three screws AA attaching the door cover to
the door assembly. (See Fig.17.)
(2) Disconnect the card wire from the connector CN551 on the
illumination board. (See Fig.18.)
(3) Take out the illumination board from the door assembly.
Fig.17
Fig.18
AA
Door assembly
Front panel assembly
Door cover
Door assembly
Illumination board CN551
Card wire
Front panel assembly

(No.MB033)1-15
3.2 DVD changer mechanism assembly section
3.2.1 Removing the tray assemblies
(See Figs.1 to 5)
(1) Remove the two screws Afrom the top cover and release
the two joints aon the both sides of the DVD changer
mechanism assembly. (See Figs.1 and 2.)
(2) Remove the two rods from the top cover and remove the
top cover from the lifter assembly. (See Figs.1 and 2.)
(3) Remove the open det lever on the left side of the DVD
changer mechanism assembly. (See Fig.3.)
(4) From the right side of the DVD changer mechanism as-
sembly, draw out the tray assemblies toward the front while
pushing the part b of the side (R) assembly. (See Fig.4.)
Attention:
The tray can be locked if all tray assemblies are attached.
(5) From the topside of the DVD changer mechanism assem-
bly, move the stopper tabs c in the direction of the arrow
and release them. Pull out the tray assemblies from the
DVD changer mechanism assembly. (See Figs.4 and 5.)
Caution:
Remove the tray assembly from top tray 5 in order.
Attention:
When reattaching the tray assembly, or when removing the
disc remaining inside, refer to another section "3.2.15 Taking
out the disc in the play mode (See Fig.39 to 42)".
Fig.1
Fig.2
Fig.3
Fig.4
Fig.5
Top cover
Lifter assembly
Rods
A
a
a
A
aRods Top cove
r
Lifter assembly
a
Open det leve
r
b
Tray assembly
c
Side (R) assembly
c
Tray assembly

1-16 (No.MB033)
3.2.2 Removing the DVD servo board
(See Figs.6 and 7)
• Prior to performing the following procedures, remove the tray
assemblies.
(1) From the topside of the DVD changer mechanism assem-
bly, solder the short-circuit points don the DVD pick up.
(See Fig.6.)
Caution:
Solder the short-circuit points don the DVD pickup be-
fore disconnecting the flexible wire extending from the
DVD pickup. If you do not follow this instruction, the DVD
pickup may be damaged.
(2) From the right side of the DVD changer mechanism as-
sembly, disconnect the card wires from the connectors
(CN103, CN201) and the wires from the connectors
(CN104, CN205) and the flexible wire from the connector
CN101 on the DVD servo board. (See Fig.7.)
(3) Remove the screw Battaching the bracket to the DVD
changer mechanism assembly. (See Fig.7.)
(4) Release the two sections eof the bracket from the DVD
changer mechanism assembly and remove the DVD servo
board with the bracket. (See Fig.7.)
(5) Remove the two screws Cattaching the DVD servo board
to the bracket. (See Fig.7.)
(6) Release the three sections fof the bracket and remove the
DVD servo board. (See Fig.7.)
Caution:
Unsolder the solders from the short-circuit points dafter reas-
sembling.
Fig.6
Fig.7
3.2.3 Removing the switch board
(See Fig.8)
(1) From the bottom side of the DVD changer mechanism as-
sembly, disconnect the wires from connectors CN104 and
CN105 on the DVD servo board.
(2) Remove the screw Dattaching the switch board to the DVD
changer mechanism assembly.
(3) Release the wires from the slots g of the switch board.
Caution:
When reassembling, let the wires through the slots g of the
switch board.
Reference:
When connecting the wires to the connectors on the DVD ser-
vo board, fix the wires with spacer.
Fig.8
DVD pickup
DVD changer mechanism assembly
Short circuit points d
DVD changer mechanism assembly
DVD servo board
Card wireBracket
Card wire
Wires Flexible wire
C
B
f
C
e
f
CN103 CN101
CN104 CN105
CN201
DVD servo board
CN104 CN105 Wires Spacer
Switch board DDVD changer
mechanism assembly
gg

(No.MB033)1-17
3.2.4 Removing the motor board
(See Figs.9 and 10)
(1) From the top side of the DVD chnager mechanism assem-
bly, remove the two belts from the motor pulleys. (See
Fig.9.)
Caution:
Take care not to attach grease on the belt.
(2) Remove the four screws Eattaching the motors to the
chassis assembly. (See Fig.9.)
(3) From the bottom side of the DVD changer mechanism as-
sembly, remove the two screws F. (See Fig.10.)
(4) Disconnect the connector CN2 on the motor board from the
tray switch board and remove the motor board. (See
Fig.10.)
(5) Disconnect the card wire from the connector CN1 on the
motor board. (See Fig.10.)
Caution:
• When connecting the card wire, let the card wire through the
slots h of the motor board. (See Fig.10.)
• When reattaching the motor, turn the side where the label
should be put to the front side. (See Fig.10.)
Reference:
• You need not to remove the tray assemblies, and in such
case, move it.
• After connecting the motor board, attach the spacer on the
motor board. (See Fig.10.)
3.2.5 Removing the motor
(See Fig. 10)
• Prior to performing the following procedures, remove the motor
board.
(1) From the reverse side of the motor board, unsolder the four
soldered sections ion the motor board.
(2) From the forward side of the motor board, remove the mo-
tors.
Fig.9
Fig.10
Motor Motor
Motor pulleys Chassis assembly
BeltBelt
E
E
F
h
CN2
Card wire
Motors
Soldered sections i
CN1
F
Motor board
DVD changer mechanism assembly
Spacer
Labels
Motors
Motor board

1-18 (No.MB033)
3.2.6 Removing the DVD traverse mechanism assembly
(See Figs.6 and 11)
• Prior to performing the following procedures, remove the tray
assemblies.
(1) From the topside of the DVD changer mechanism assem-
bly, solder the short-circuit points don the DVD pick up.
(See Fig.6.)
Caution:
Solder the short-circuit points don the DVD pickup be-
fore disconnecting the flexible wire extending from the
DVD pickup. If you do not follow this instruction, the DVD
pickup may be damaged.
(2) From the bottom side of the DVD changer mechanism as-
sembly, disconnect the flexible wire from the connector
CN101 on the DVD servo board. (See Fig.11.)
(3) Disconnect the card wire from the connector CN201 on the
DVD servo board. (See Fig.11.)
(4) Remove the three screws Gattaching the DVD traverse
mechanism assembly. (See Fig.11.)
(5) Take out the DVD traverse mechanism assembly from the
DVD changer mechanism assembly.
Caution:
Unsolder the solders from the short-circuit points dafter reas-
sembling.
Reference:
When connecting the each wire to the connectors on the DVD
servo board, fix the each wire with spacers.
Fig.11
Spacers
Flexible wire Card wire
CN101
CN201
G
G
DVD changer mechanism assembly
DVD traverse mechanism assembly
DVD servo board

(No.MB033)1-19
3.2.7 Removing the DVD pickup
(See Figs.12 to 14)
• Prior to performing the following procedures, remove the tray
assemblies and DVD traverse mechanism assembly.
(1) From topside of the DVD traverse mechanism assembly,
disconnect the flexible wire from the connector on the DVD
pickup. (See Fig.12.)
(2) Turn the screw shaft gear in the direction of the arrow 1 to
move the DVD pickup in the direction of the arrow 2. (See
Fig.12.)
(3) Remove the screw Hattaching the gear holder. (See
Fig.12.)
(4) Remove the screw Jattaching the SS adj. spring. (See
Fig.12.)
(5) Move the DVD pickup in the direction of the arrow and re-
move the screw shaft from the section jon the screw shaft
holder. (See Fig.13.)
(6) Remove the section kof the DVD pickup from the guide
shaft. (See Fig.13.)
(7) Remove the two screws Kattaching the rack arm to the
DVD pickup. (See Fig.14.)
(8) Pull the screw shaft from the DVD pickup in the direction of
the arrow. (See Fig.14.)
3.2.8 Attaching the DVD pickup
(See Figs.12 to 14)
(1) Attach the screw shaft to the DVD pickup and attach the
rack arm with the screws K. (See Fig.14.)
Reference:
After attaching the screw shaft to the DVD pickup, attach
the screw shaft collar to the screw shaft. (See Fig.14.)
(2) Attach the section kof the DVD pickup to the guide shaft
first and attach the screw shaft to the section jon the screw
shaft holder. (See Fig.14.)
(3) Attach the SS adj. spring and gear holder with the screws
Hand J. (See Fig.12.)
(4) Turn the screw shaft gear to move the DVD pickup toward
the left. (See Fig.12.)
(5) Connect the flexible wire to the connector on the DVD pick-
up. (See Fig.12.)
Fig.12
Fig.13
Fig.14
SS adj. spring
Screw shaft
gear
Gear holder DVD pickup
Connector
JH
DVD traverse mechanism assembly
Flexible wire
2
1
DVD pickup Guide shaft
Screw shaft Screw shaft holder
k
j
Screw shaft colla
r
Screw shaft
DVD pickup
Rack arm
K

1-20 (No.MB033)
3.2.9 Removing the spindle motor board
(See Figs.15 and 16)
• Prior to performing the following procedures, remove the tray
assemblies and DVD traverse mechanism assembly.
(1) From the topside of the DVD traverse mechanism assem-
bly, remove the four screws Lattaching the DVD traverse
mechanism assembly to the DVD traverse mechanism
base. (See Fig.15.)
(2) Remove the wires from the solered section mon the spin-
dle motor board. (See Fig.15.)
(3) Remove the screw Mattaching the spindle motor board.
(See Fig.15.)
(4) From the bottom side of the DVD traverse mechanism as-
sembly, remove the three screws Nattaching the spindle
motor board. (See Fig.16.)
Reference:
When attaching the spindle motor board, let the card wire
through the hole n on the motor base. (See Fig.15.) Fig.15
Fig.16
3.2.10 Removing the feed moter
(See Figs.17 and 18)
• Prior to performing the following procedures, remove the tray
assemblies, DVD traverse mechanism assembly, DVD pickup
and spindle motor board.
• Remove the wires of the feed motor as required.
(1) Remove the middle gear in the direction of the arrow. (See
Fig.17.)
(2) Remove the screw Pand screw Qattaching the motor
base.
(3) Remove the screw Rattaching the feed motor to the motor
base. (See Fig.18.)
(4) Take out the feed motor from the motor base.
Reference:
After attaching the feed motor, let the wires through the sec-
tions pand qon the motor base. (See Fig.17.)
Fig.17
Fig.18
Spindle motor board
Motor base
L
L
L
M
n
m
DVD traverse mechanism assembly
DVD traverse mechanism base
Card wire
Wires
N
Feed motor
Middle
gear
Q
P
qp
Motor base
Traverse mechanism chassis
Feed motor
Motor base R