JVC TH-M65 User manual

SERVICE MANUAL
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED No.MB112
2003/12
DVD DIGITAL CINEMA SYSTEM
MB112200312 TH-M65
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-40
Area suffix
US ---------------------- Singapore
UW ---------- Brazil,Mexico,Peru
UJ --------------------- U.S.Military
UG - Turkey,South Africa,Egypt
XV-THM65
SP-PWM65 SP-THM65C SP-THM65F SP-THM65F SP-THM65F SP-THM65F

1-2 (No.MB112)
SPECIFICATION
Designs & specifications are subject to change without notice.
Center unit (XV-THM65)
Audio Audio input sensitivity/Impedance (at 1 kHz), Total Harmonic Distortion 0.02 %
NOTE : This value is measured at System cord CONNECTOR for reference.
Analog input AUDIO IN (VCR) 290 mV/47 KΩ
MIC 4.3 mV/600 Ω
Digital input* DIGITAL IN (DBS) -21 dBm to -15 dBm
(OPTICAL) (660 nm E30 nm)
* Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz)
Digital output DIGITAL OUT -21 dBm to -15 dBm
(OPTICAL) (660 nm E30 nm)
Video Color System NTSC/PAL selectable
Horizontal Resolution 500 lines
Signal-to-Noise Ratio 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
Component-Y 1.0 V(p-p)/75 Ω
Component-PB/PR 0.7 V(p-p)/75 Ω
Video input sensitivity/
Impedance (VCR IN) 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 Tuning Range FM 87.50 MHz to 108.00 MHz
AM 531 kHz to 1 602 kHz (at 9 kHz intervals)
530 kHz to 1 600 kHz (at 10 kHz intervals)
General Power Requirements AC 110 - 230 V , 50 Hz/60 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 (SP-PWM65)
Amplifier 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 Speaker unit 20 cm Bass-reflex, Magnetically Shielded
Frequency Range 25 Hz to 200 Hz
General Power Requirements AC 110 V/127 V/220 - 230 V selectable with the voltage selector, 50 Hz/60 Hz
Power Consumption 150 W (at operation) 0 W (in standby mode)
Dimensions (W ×H ×D) 235 mm ×355 mm ×492 mm
Mass 13.0 kg
Satellite Speakers (SP-THM65F)
Speakers 5.5 cm ×2 Bass-reflex, Magnetically Shielded
Power Handling Capacity 80 W
Impedance 6 Ω
Frequency Range 90 Hz to 20 kHz
Dimensions (W ×H ×D) 250 mm ×1 103 mm ×250 mm
Mass 3.77 kg
Center Speaker (SP-THM65C)
Speakers 5.5 cm ×2 Bass-reflex, Magnetically Shielded
Power Handling Capacity 80 W
Impedance 6 Ω
Frequency Range 90 Hz to 20 kHz
Dimensions (W ×H ×D) 258 mm ×75 mm ×81 mm
Mass 0.95 kg

(No.MB112)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)
1500 10W
0.15 F AC TYPE

1-4 (No.MB112)
1.5 Preventing static electricity
1.5.1 Grounding to prevent damage by static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser
diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.5.2 About the earth processing for the destruction prevention 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.
1.5.3 Handling the optical pickup
(1) In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pick-
up are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)
(2) 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.
1.5.4 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) Remove solder of the short lands on the flexible wire after replacing the optical pickup. For specific details, refer to the replace-
ment 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 wire carefully as it may break when subjected to strong force.
(4) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.5.5 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the DVD pickup.
• 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 circuit points after connecting the flexible wire.
Conductive material
(conductive sheet) or iron plate
(caption)
Anti-static wrist strap
DVD pickup
DVD changer mechanism assembly
Short circuit points

(No.MB112)1-5
1.6 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
laserradiation and is equipped with safety switches
whichprevent 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.
CLASS 1
LASER PRODUCT
CLASS 1 LASER PRODUCT LABEL
REPRODUCTION AND POSITION OF LABELS
WARNING LABEL
(Inside)

1-6 (No.MB112)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MB112)1-7
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the metal cover
(See Figs.1 to 4)
(1) From the 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
cover, 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 ausing a longer screwdriver. Fig.1
Fig.2
Fig.3
Fig.4
Metal cover
A
Metal cover
A
Metal cove
r
Rear panel
B
Metal cove
r
Claws aClaws a

1-8 (No.MB112)
3.1.2 Removing the front panel assembly
(See Figs.5 and 6)
• Prior to performing the following procedures, 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,
CN413) on the main board. (See Fig.5.) [US/UW/UG
version]
(3) Disconnect the card wires from the connectors (CN407,
CN412) on the main board. (See Fig.5.) [UJ version]
(4) Remove the screw Cattaching the earth wire to the main
board. (See Fig.5.)
(5) From the bottom side of the main body, remove the three
screws Dattaching the front panel assembly. (See Fig.6.)
(6) Release the two hooks band hook cfrom the both and
bottom sides of the main body, and remove the front panel
assembly in the direction of the arrow. (See Figs.5 and 6.)
Fig.5
Fig.6
CN407
CN413
CN409
CN408 Hook b
Hook b
Main board
C
Card wire
Earth wire
Parallel wires
Front panel assembly
Card wire
CN412
Card wire
Hook c
Front panel
assembly
D

(No.MB112)1-9
3.1.3 Removing the DVD changer mechanism assembly
(See Fig.7)
• Prior to performing the following procedures, remove the metal
cover and 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 bottom chassis.
(3) Take out the DVD changer mechanism assembly in an
upward direction.
Note:
When attaching the screw E, fit the hole of the DVD changer
mechanism assembly to the bosses don the bottom chassis.
Fig.7
3.1.4 Removing the rear panel
(See Fig.8)
• Prior to performing the following procedure, remove the metal
cover.
(1) From the back side of the main body, remove the screw F,
ten 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

1-10 (No.MB112)
3.1.5 Removing the audio & digital input board
(See Figs.9 and 10)
• Prior to performing the following procedures, 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 three 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)
• Prior to performing the following procedures, 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)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the top side of the main body, disconnect the parallel
wires from the connectors (CN416,CN402 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
CN416
Card
wires
N
KL M P
Rear panel

(No.MB112)1-11
3.1.8 Removing the main board
(See Figs.11 to 13)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the top side of the main body, disconnect the card
wires from the connectors (CN405, CN407, CN410,
CN411, CN413, CN415) on the main board. (See Fig.11.)
[US/UW/UG version]
(2) From the top side of the main body, disconnect the card
wires from the connectors (CN405, CN407, CN410,
CN411, CN412, CN415) on the main board. (See Fig.11.)
[UJ version]
(3) Disconnect the parallel wires from the connectors (CN416,
CN402 to CN404, CN408,CN409) on the main board. (See
Fig.11.)
(4) Remove the screw Qattaching the audio & digital input
board. (See Fig.11.)
(5) From the back side of the main body, remove the five
screwsRand three screws Sattaching the rear panel. (See
Fig.12.)
(6) Take out the rear panel together the audio & digital input
board and tuner.
(7) From the top side of the main body, remove the screw T
and two screws Uattaching the main board to the bottom
chassis. (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
CN413
CN402
CN407
CN409
CN408
CN410 CN403
CN404
Tuner
Audio & Digital input board
Main board
Q
CN416 CN405
CN415
Parallel wires
Card wire
Card wire
Card wire Card wires
Parallel wire
Parallel wire
CN412
Card
wires
SS
S
R
Rear panel
Main board
T
U
U
Earth wire Front panel assembly
Bottom chassis

1-12 (No.MB112)
3.1.9 Removing the connect board
(See Fig.14)
• Prior to performing the following procedures, remove the metal
cover and 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.
Fig.14
3.1.10 Removing the phone jack board and microphone volume board
(See Figs.14,15 and 17)
• Prior to performing the following procedures, remove the metal
cover and front panel assembly.
(1) From the front side of the front panel assembly, pull out the
microphone volume knob. (See Fig.17.) [US/UW/UG
version]
(2) From the inside of the front panel assembly, remove the
two screws Wattaching the phone jack board. (See
Fig.14.)
(3) Take out the phone jack board together the microphone
volume board. [US/UW/UG version]
(4) Take out the phone jack board. [UJ version]
(5) From the forward side of the phone jack board, disconnect
the wire from the connector CN702 on the phone jack
board. (See Fig.15.) [US/UW/UG version]
(6) From the reverse side of the microphone board, remove
the screw Xattaching the microphone board to the brack-
et(H.phone) on the phone jack board. (See Fig.15.) [US/
UW/UG version]
3.1.11 Removing the operation board
(See Fig.16)
• Prior to performing the following procedures, remove the metal
cover and front panel assembly.
(1) Remove the two screws Yattaching 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.16 and 17)
• Prior to performing the following procedures, remove the metal
cover, front panel assembly and connect board and operation
board.
(1) From the front side of the front panel assembly, pull out the
volume knob. (See Fig.17.)
(2) From the inside of the front panel assembly, remove the
eight screws Zattaching the front board. (See Fig.16.)
(3) Take out the front board while releasing the claws ein the
direction of the arrow. (See Fig.16.)
Fig.15
Fig.16
Fig.17
CN561 Connect board
Card wire
Support board
Phone jack board
W
W
V
Microphone volume board
Wire
Microphone volume board
X
Phone jack board
Bracket (H.phone)
CN702
Operation board
Button(top)
Claws e
Y
Z
ZZ
Front board
Front panel assembly
Volme knob
Microphone volume knob

(No.MB112)1-13
3.1.13 Removing the illumination board
(See Figs.18 and 19)
(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.18.)
(2) Disconnect the card wire from the connector CN551 on the
illumination board. (See Fig.19.)
(3) Take out the illumination board from the door assembly.
Fig.18
Fig.19
AA
Door assembly
Front panel assembly
Door cover
Door assembly
Illumination board CN551
Card wire
Front panel assembly

1-14 (No.MB112)
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

(No.MB112)1-15
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

1-16 (No.MB112)
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

(No.MB112)1-17
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

1-18 (No.MB112)
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

(No.MB112)1-19
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

1-20 (No.MB112)
3.2.11 Removing the side (L) assembly and tray switch board
(See Figs.19 to 21)
• Prior to performing the following procedures, remove the tray
assemblies.
(1) From the topside of the DVD changer mechanism assem-
bly, remove the two screws Sattaching the side (L) assem-
bly. (See Fig.19.)
(2) From the left side of the DVD changer mechanism assem-
bly, removing the spacer fixing the tray switch board and
motor board. (See Fig.20.)
(3) Disconnect the connector CN3 on the tray switch board
from the motor board and detach the side (L) assembly in
an upward direction. (See Fig.20.)
(4) Remove the screw Tattaching the tray switch board to the
side (L) assembly. (See Fig.21.)
(5) Release the joint tab rof the side (L) assembly in the direc-
tion of the arrow 1 and release the joint tab swhile remov-
ing the tray switch board in the direction of the arrow 2.
(See Fig.21.)
Reference:
After attaching the tray switch board to the motor board, fix
them with spacers.
Fig.19
Fig.20
Fig.21
S
Side (L) assembly
S
CN3
Spacer
Side (L) assembly
SS
Motor board
Side (L) assembly
r
s
T
Tray switch board
Side (L) assembly 1
2