JVC TH-M42, XV-THM42, SP-THM45C, SP-THM45F, SP-THM45S Service Manual
...
MB075200310
SERVICE MANUAL
DVD DIGITAL THEATER SYSTEM
TH-M55
Area suffix
J ----------------------------- U.S.A.
C -------------------------- Canada
SP-THM55C
SP-THM55F SP-THM55F SP-THM55F SP-THM55F
XV-THM55
SP-PWM55
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
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.MB075
2003/11
SPECIFICATION
Audio section
Total Harmonic Distortion 0.02%
Audio input sensitivity/
Impedance (at 1 kHz)
Video section
Color System NTSC
Horizontal Resolution 500 lines
Signal-to-Noise Ratio 64 dB
Video output level Composite 1.0 V(p-p)/75 Ω
Video input sensitivity/
Impedance (VCR IN)
Tuner section
Tuning Range FM 87.5 MHz to 108.0 MHz
General
Power Requirements AC 120 V, 60 Hz
Power Consumption 20 W (at operation), 1.0 W (in standby mode)
Dimensions (W × H × D) 400 mm × 85 mm × 386 mm (15-3/4 inches × 3-3/8 inches × 15-1/14 inches)
Mass 4.6 kg (10.2 lbs)
Amplifier section
Front/Center/Surround 100 W per channel, RMS at 4 Ω at 1 kHz, with 10 % total harmonic distortion.
Subwoofer 120 W, RMS at 4 Ω at 100 Hz, with 10 % total harmonic distortion.
Speaker section
Speaker unit 16 cm (6-5/16 inches) Bass-reflex, Magnetically Shielded
Frequency Range 30 Hz to 200 Hz
General
Power Requirements AC 120 V, 60 Hz
Power Consumption 150 W (at operation), 0 W (in standby mode)
Dimensions (W × H × D) 216 mm × 353 mm × 485 mm (8-9/16 inches × 13-15/16 inches × 19-1/8 inches)
Mass 12.0 kg (26.5 lbs)
Speakers Woofer 10.0 cm (3-15/16 inches)
Power Handling Capacity 100 W
Impedance 4 Ω
Frequency Range 65 Hz to 20 kHz
Dimensions (W × H × D) 140 mm × 228 mm × 167 mm (5-9/16 inches × 9 inches × 6-5/8 inches)
Mass 1.9 kg (4.2 lbs)
Speakers Woofer 8.0 cm (3-3/16 inches) × 2
Power Handling Capacity 100 W
Impedance 4 Ω
Frequency Range 65 Hz to 20 kHz
Dimensions (W × H × D) 326 mm × 119 mm × 164 mm (12-7/8 inches × 4-11/16 inches × 6-1/2 inches)
Mass 2.4 kg (5.3 lbs)
Remote control (1), Batteries (2), FM antenna (1), AM loop antenna (1), Power cord (1), System cord (1), Composite video cord (1)
Speaker codes (1)
5 m (16 ft) For satellite (front left/right) and center speakers (3)
10 m (32 ft) For satellite speakers (surround left/right) (2) (The length of the above speaker cords are approximate.)
NOTE : This value is measured at System cord CONNECTOR for reference.
Analog input AUDIO IN (VCR) 290 mV/47 kΩ
Digital input* DIGITAL IN (DBS) (OPTICAL) -21 dBm to -15 dBm (660 nm ±30 nm)
* Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling freque ncy - 32 kHz, 44.1 kHz, 48 kHz)
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
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
AM 530 kHz to 1710 kHz
Tweeter 4.0 cm (1-5/8 inches) Bass-reflex, Magnetically Shielded
Tweeter 4.0 cm (1-5/8 inches) Bass-reflex, Magnetically Shielded
Center unit
Subwoofer
Satellite Speaker
Center Speaker
Accessories
Design and specifications are subject to change without notice.
1-2 (No.MB075)
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of th is product contains special hardware and
many circuits and components specially for safety purposes. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be performed by qualified personnel only.
(2) Alterations of the design or circuitry of the product should
not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety characteristics as the recommended replacement parts shown in
the Parts List of Service Manual may create shock, fire, or
other hazards.
(4) The leads in the products are routed and dressed with ties,
clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassembling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.Do not
use a line isolation transformer during this check.
• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).
• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000Ω per volt or more sensitivity
in the following manner. Connect a 1,500Ω 10W resistor
paralleled by a 0.15µF AC-type capacitor between an exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
0.15 F AC TYPE
Place this
probe on
1500 10W
Good earth ground
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal resp onsibility 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 compone nts are replaced
by approved parts.
(5) If mains voltage selector is provided, check setting for local
voltage.
1.3 Caution
Burrs formed during molding may be left over on some parts
of the chassis.
Therefore, pay attention to such burrs in the case of preforming repair of this system.
1.4 Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
each exposed
metal part.
(No.MB075)1-3
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 sh eet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
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 orig inal condition. (Refer to the text.)
(2) Do not use a tester to check the condition of the laser diode in the optical pickup. T he 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.
Short circuit points
DVD pickup
DVD changer mechanism assembly
1-4 (No.MB075)
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.
(No.MB075)1-5
1.7 Importance administering point on the safety
<Main body section>
Power supply board (Forward side)
F901
<SP-PWM55 subwoofer section>
Speaker terminal board (Forward side)
F101
Mother board (Forward side)
F153
F154
Caution: For continued protection against risk of
fire, replace only with same type 1.6A/125V for
F901, 6.3A/125V for F101, 8A/125V for F153 and
F154.
This symbol specifies type of fast operating fuse.
Precaution: Pour eviter risques de feux, remplacez
le fusible de surete de F901 comme le meme type
que 1.6A/125V, et 6.3A/125V pour F101, et 8A/125V
pour F153 et F154.
Ce sont des fusibles suretes qui functionnes rapide.
1-6 (No.MB075)
^
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.MB075)1-7
SECTION 3
r
r
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 A attaching the metal cover. (See Figs.1 and
2.)
(2) From the back side of the main body, remove the three
screws B attaching the metal cover. (See Fig.3.)
(3) Lift the rear section of the metal cover in the direction of the
arrow while extending the lower sections of the metal cover, release the claws a using a longer screwdriver from the
inside as required. (See Fig.4.)
Note:
Do not damage any parts and boards inside the main body
when releasing the joints a using a longer screwdriver.
B
Metal cover
A
Fig.1
Metal cover
A
Fig.2
Metal cove
Rear panel
Fig.3
Metal cove
Claws a Claws a
Fig.4
1-8 (No.MB075)
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
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 C attaching the earth wire to the main
board. (See Fig.5.)
(4) From the bottom side of the main body, remove the three
screws D attaching the front panel assembly. (See Fig.6.)
(5) Release the two hooks b and hook c from the both and bot-
tom sides of the main body, and remove the front panel assembly in the direction of the arrow. (See Figs.5 and 6.)
, CN409) on the main
Card wire
Main board
,
Card wire
CN407
CN412
C
Earth
wire
CN409
Hook b
Front panel assembly
CN408
Parallel wires
Fig.5
Fig.6
D
Hook b
Hook c
Front panel
assembly
(No.MB075)1-9
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 bod y, disconnect the card
wires from the connectors (CN405
board.
(2) Remove the four screws E attaching the DVD changer
mechanism assembly to the bottom chassis.
(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 d on the bottom chassis.
, CN415) on the main
DVD changer mechanism
assembly
E
Boss d
E
Main board
Boss d
CN405
CN415
Card wires
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 G and three screws H attaching the rear panel.
E
Fig.7
Bottom chassis
FG
HH
G
H
Fig.8
Rear panel
1-10 (No.MB075)
3.1.5 Removing the audio & digital inpu t boa r d
A
(See Figs.9 and 10)
• Remove the metal cover.
(1) From the top side of the main body, disconn ect the card
wire from the connector CN401
board. (See Fig.9.)
(2) Remove the screw J attaching the audio & digital input
board. (See Fig.9.)
(3) From the back side of the main body, remove the screw K
and two screws L attaching 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, disconn ect the card
wire from the connector CN1
(2) From the back side of the main body, remove the two
screws M attaching 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 (CN416
the main board. (See Fig.9.)
(2) Remove the three screws N attaching the p ower 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.)
on the audio & digital input
on the tuner. (See Fig.9.)
, CN402 to CN404) on
Main board
CN401
CN402
CN416
N
J
Card
wires
CN1 CN403
Tuner
udio & Digital input board
CN404
Fig.9
KL M P
Fig.10
Power supply board
N
Parallel wires
Rear panel
(No.MB075)1-11
3.1.8 Removing the main board
(See Figs.11 to 13)
• Remove the metal cover.
(1) From the top side of the main bod y, disconnect the card
wires from the connectors (CN405, CN407, CN410 to
, CN415) on the main board. (See Fig.11.)
CN412
Disconnect the parallel wires from the connectors (CN416
CN402 to CN404, CN408, CN409) on the main board. (See
Fig.11.)
(2) Remove the screw Q attaching the audio & digital input
board. (See Fig.11.)
(3) From the back side of the main body, remove the five
screws R and three screws S attaching the rear panel. (See
Fig.12.)
(4) Take out the rear panel together the audio & dig ital input
board and tuner.
(5) From the top side of the main body, remove th e screw T
and two screws U attaching 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.
,
CN407
Parallel wire
Card wire
CN412
Card wire
Q
CN401
CN416
Audio & Digital input board
Card wire
CN409
CN410
Card wire
CN411
Tuner
Main board
Card wires
CN405
CN403
Fig.11
Parallel wire
CN408
Parallel wires
CN404
CN415
S
T
U
Earth wire
S
Fig.12
Main board
R
S
Rear panel
Front panel assembly
U
1-12 (No.MB075)
Bottom chassis
Fig.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
(2) Remove the screw V attaching 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 W attaching the phone jack board.
(2) Take out the phone jack board.
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 X attaching the operation board.
(2) Take out the operation board together the button(top).
Reference:
Remove the button(top) from the front board as required.
on the connect board.
Phone jack board
W
W
Front board
X
Z
CN561 Connect board
V
Card wire
Support board
Fig.14
Operation board
Button(top)
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 Y attaching the vol. ring to the front pan-
el assembly. (See Fig.16.)
(3) From the inside of the front panel assembly, remove the
eight screws Z attaching the front board. (See Fig.15.)
(4) Take out the fron t board w hile releasin g the claws e in the
direction of the arrow. (See Fig.15.)
ZZ
Vol. ring
Claws e
Fig.15
Front panel assembly
Y
Volme knob
Fig.16
(No.MB075)1-13
3.1.13 Removing the illumination board
(See Figs.17 and 18)
(1) Open the door assembly of th e 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
illumination board. (See Fig.18.)
(3) Take out the illumination board from the door assembly.
on the
Front panel assembly
Door cover
Illumination board CN551
Door assembly
Door assembly
AA
Fig.17
Front panel assembly
Card wire
Fig.18
1-14 (No.MB075)
3.2 DVD changer mechanism assembly section
r
r
3.2.1 Removing the tray assemblies
(See Figs.1 to 5)
(1) Remove the two screws A from the top cover and release
the two joints a on 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 th e 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 chang er 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)".
Top cover
Open det leve
Fig.3
c
A
a
Lifter assembly
a
Fig.1
Rods
Rods
Top cove
A
Tray assembly
a
Tray assembly
c
b
Fig.4
Side (R) assembly
Lifter assembly
Fig.2
a
Fig.5
(No.MB075)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 d on the DVD pick up.
(See Fig.6.)
Caution:
Solder the short-circuit points d on the DVD pickup before 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
(CN104
CN101
(3) Remove the screw B attaching the bracket to the DVD
changer mechanism assembly. (See Fig.7.)
(4) Release the two sections e of 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 C attaching the DVD servo board
to the bracket. (See Fig.7.)
(6) Release the three sections f of the bracket and remove the
DVD servo board. (See Fig.7.)
Caution:
Unsolder the solders from the short-circuit points d after reassembling.
, CN201) and the wires from the connectors
, CN205) and the flexible wire from the connector
on the DVD servo board. (See Fig.7.)
Short circuit points d
DVD changer mechanism assembly
Fig.6
DVD changer mechanism assembly
C
f
DVD servo board
CN104
CN105
CN103 CN101
DVD pickup
C
f
CN201
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
on the DVD servo board.
CN105
(2) Remove the screw D attaching 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 servo board, fix the wires with spacer.
and
B
Card wireBracket
DVD servo board
CN104 CN105 Wires Spacer
Switch board
Card wire
Wires Flexible wire
Fig.7
g
D
g
DVD changer
mechanism assembly
Fig.8
e
1-16 (No.MB075)
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 E attaching 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
tray switch board and remove the motor board. (See
Fig.10.)
(5) Disconnect the card wire from th e connector CN1
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.)
on the motor board from the
on the
E
Motor Motor
Motor pulleys
Labels
BeltBelt
E
Chassis assembly
Fig.9
Motors
Motor board
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 i on the motor board.
(2) From the forward side of the motor board, remove the mo-
tors.
Soldered sections i
Spacer
F
CN2
CN1
h
DVD changer mechanism assembly
Motors
Fig.10
Motor board
F
Card wire
(No.MB075)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 d on the DVD pick up.
(See Fig.6.)
Caution:
Solder the short-circuit points d on the DVD pickup before 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
on the DVD servo board. (See Fig.11.)
CN101
(3) Disconnect the card wire from the connector CN201
DVD servo board. (See Fig.11.)
(4) Remove the three screws G attaching the DVD trave rse
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 d after reassembling.
Reference:
When connecting the each wire to the connectors on the DVD
servo board, fix the each wire with spacers.
on the
DVD changer mechanism assembly
DVD servo board
G
Flexible wire Card wire
DVD traverse mechanism assembly
G
Fig.11
Spacers
CN101
CN201
1-18 (No.MB075)
3.2.7 Removing the DVD pickup
r
(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 assembl y,
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 H attaching the gear holder. (See
Fig.12.)
(4) Remove the screw J attaching 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 j on the screw shaft
holder. (See Fig.13.)
(6) Remove the section k of the DVD pickup from the guide
shaft. (See Fig.13.)
(7) Remove the two screws K attaching 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 a nd 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 k of the DVD pickup to the guide shaft
first and attach the screw shaft to the section j on the screw
shaft holder. (See Fig.14.)
(3) Attach the SS adj. spring and gear holder wi th the screws
H and 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.)
DVD traverse mechanism assembly
Connector
Screw shaft
gear
1
Gear holder DVD pickup
Fig.12
DVD pickup Guide shaft
Screw shaft Screw shaft holder
Fig.13
DVD pickup
Flexible wire
2
SS adj. spring
JH
k
j
Rack arm
K
Screw shaft colla
Screw shaft
Fig.14
(No.MB075)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 L attaching the DVD traverse
mechanism assembly to the DVD traverse mechanism
base. (See Fig.15.)
(2) Remove the wires from the solere d section m on the spi n-
dle motor board. (See Fig.15.)
(3) Remove the screw M attaching the spindle motor board.
(See Fig.15.)
(4) From the bottom side of the DVD traverse mechanism as-
sembly, remove the three screws N attaching 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.)
n
M
m
Wires
Card wire
L
L
DVD traverse mechanism assembly
Motor base
Spindle motor board
DVD traverse mechanism base
Fig.15
N
L
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 P and screw Q attaching the motor
base.
(3) Remove the screw R attaching 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 sections p and q on the motor base. (See Fig.17.)
Motor base
Middle
gear
Fig.16
Feed motor
P
qp
Q
Traverse mechanism chassis
Fig.17
Feed motor
1-20 (No.MB075)
Motor base
R
Fig.18
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 chang er mechanism assem-
bly, remove the two screws S attaching 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
from the motor board and detach the side (L) assembly in
an upward direction. (See Fig.20.)
(4) Remove the screw T attaching the tray switch board to the
side (L) assembly. (See Fig.21.)
(5) Release the joint tab r of the side (L) assembly in the direc-
tion of the arrow 1 and release the joint tab s while removing 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.
on the tray switch board
Side (L) assembly
S
S
Fig.19
S
Side (L) assembly
Side (L) assembly
S
CN3
Spacer
Side (L) assembly
Motor board
Fig.20
r
1
2
s
Tray switch board
T
Fig.21
(No.MB075)1-21
3.2.12 Removing the side (R) assembly
(See Fig.22 to 26)
• Prior to performing the following procedures, remove the tray
assemblies and DVD servo board.
• When removing the DVD servo board, it is not necessary to re-
move the DVD servo board from the bracket.
(1) From the inside of the side (R) assembly, release the two
tabs t of the gear cover and remove the gear cover outward. (See Figs.22 and 23.)
(2) From the right side of the DVD changer mechanism as-
sembly, remove the elevator spring attached to the hook u
of the chassis assembly. (See Figs.23 and 24.)
(3) From the topside of the DVD changer mechanism assem-
bly, turn the gear 1 clockwise to move the elevator cam
rearward. (See Fig.24.)
(4) Move the two slots v and joint w of the elevator cam and
remove the elevator cam outward. (See Fig.24.)
(5) Remove the three screws U and detach the side (R) as-
sembly upward. (See Figs.25 and 26.)
Caution:
When reattaching the side (R) assembly, make sure to fit the
shaft (part x) into the slot of the select lever. (See Fig.25.)
Side (R) assembly
t
U
Elevator spring
vv
w
Fig.24
u
Elevator cam
U
Select lever
x
Side (R) assembly
Gear cover
Elevator cam
Fig.22
Elevator spring
U
Side (R) assembly
Fig.25
Gear 1
U
u
U
Chassis assembly
Fig.23
1-22 (No.MB075)
Side (R) assembly
Fig.26
3.2.13 Removing the lifter assembly
(See Figs.27 to 31)
• Prior to performing the following procedures, remove the tray
assembies, DVD servo board, side (L) assembly and sid e (R)
assembly.
• When removing the DVD servo board, it is not necessary to re-
move the DVD servo board from the bracket.
(1) From the topside of the DVD chang er mechanism assem-
bly, turn the gear 1 clockwise to move the lifter assembly
upward. (See Figs.27 and 28.)
(2) Turn the gear 2 clockwise to move the hook toward the
front until it stops. (See Figs.27 and 28.)
(3) Move the hook stopper in the direction of the arrow 2 while
pushing the tab y of the hook stopper to unlock it in the direction of the arrow 1 and release four joints z to detach
from the rack holder. (See Fig.29.)
(4) Release the rod from part aa. (See Fig.29.)
(5) Turn the gear 1 clockwise again to move the lifter assembly
upward. (See Fig.30.)
(6) Remove the lifter assembly from the DVD changer mecha-
nism assembly upward at the positions ab where the four
pins on the both sides of the lifter assembly fit to the notch-
es of the chassis assembly. (See Fig.30.)
(7) Move the lifter assembly in the directio n of the arrow and
release it from the hook. (See Fig.31.)
Hook stopper
Gear 2
Gear 1
z
Rack holder
Hook
aa
z
z
1
Rod (L)
2
y
z
Hook stopper
Fig.29
Lifter assembly
ab
ab
Gear 1
Hook
Gear 2
Lifter assembly
Fig.27
Gear 1
Lifter assembly
Chassis assembly
Lifter assembly
Fig.30
ab
ab
Hook stopper
Hook
Fig.28
Hook
Fig.31
(No.MB075)1-23
3.2.14 Removing the rack holder assembly and sensor assembly
(See Figs.32 to 38)
• Prior to performing the following procedures, remove the tray
assemblies, side (L) assembly, side (R) assembly and lifter assembly.
Reference:
If the slide gear of the DVD changer mechanism assembly
places at joint ac of the rack holder assembly, turn the gear 1
counterclockwise to move the slide gear in the direction of the
arrow. Then Remove the rack holder assembly. (See Figs.32
and 33.)
(1) Remove the three screws V attaching the rack holder as-
sembly and release joint ac from the notch ad. (See
Figs.32 and 34.)
Caution:
When reattaching the rack holder assembly, do not nip
the wires extending from the sensor assembly. (See
Fig.32.)
(2) Remove the two screws W attaching the sensor assembly.
(See Figs.35 and 38.)
(3) Move the sensor assembly in the direction of the a rrow to
release from the joint section ae. (See Figs.35 and 38.)
(4) Remove the sensor spring attached to the bottom of the
sensor assembly from the boss af on the sensor slider.
(See Figs.35 and 36.)
(5) Remove the screw X and Y attaching the sensor board and
SV. resister respectively. (See Fig.37.)
Reference:
Remove the soldered section ai on the sensor board as required. (See Fig.37.)
Caution:
• When reattaching the SV. resister, attach the sensor slider
to the sensor bracket and fit the lever on the bottom of the
SV. resister into slot aj of the sensor slider. (See Figs.36 and
37.)
• When reattaching the rack holder assembly, turn the gear 1
clockwise to move the slide gear and slide lever inside the
body in the direction of the arrow. (See Figs.32 and 38.)
• Let the wire extending from the sensor assembly through
notch ag to the bottom of the DVD changer mechanism assembly. (See Figs.35 and 38.)
• Fit pin ak of the slide lever into hole ah of the sensor slider
on the bottom of the sensor assembly while attaching the
sensor spring to the boss af of the sensor slider. (See
Figs.36 and 38.)
• Joint section ae of the sensor assembly to the notch am of
the DVD changer mechanism assembly. (See Figs.35 and
38.)
V
Slide gear
Slide gear
Rack holder assembly
V
ac
Wires
V
Fig.32
Rack holder assembly
ac
Fig.33
Gear 1
1-24 (No.MB075)
Rack holder assembly
r
XY
Sensor board
W
ad
Fig.34
ac
ag
Sensor assembly
Sensor slide
SV resister
aj
Slide gear
ai
Sensor bracket
Sensor slider
Fig.37
W
Sensor assembly
W
ae
ah
W
af
Sensor slider
af
ae
Fig.35
aj
Sensor spring
ah
am
ak
af
Sensor spring
Fig.38
ag
Slide lever
Sensor spring
Fig.36
(No.MB075)1-25
3.2.15 Taking out the disc in the play mode
r
(See Fig.39 to 42)
Reference:
Refer to "Removing the tray assemblies".
(1) From the topside of the DVD mechanism assembly, re-
move the top cover.
(2) Unlock the tray assemblies and draw out the tray assem-
blies toward the front.
(3) From the top side of the DVD mechanism assembly, turn
the gear 1 clockwise to move the lifter assembly upward.
(See Fig.39.)
(4) Turn the gear 2 clockwise to move the su b tray remaining
inside the lifter assembly toward the front, then pull out.
(See Fig.39.)
(5) Take out the disc on the sub tray. (See Fig.40.)
(6) After clearing away the disc, insert the sub tray into the
main tray. (See Fig.41.)
Caution:
When reattaching the sub tray, move the tray stopper on
the bottom of the main tray in the direction of the arrow
to lock the sub tray certainly. (See Figs.41 and 42.)
(7) Push the tray assembly toward the body and reattach.
Tray assemblies
Tray assembly
Tray stopper
Disc
Sub tray
Fig.40
Main tray
Gear 2
Gear 1
Sub tray
Sub tray
Fig.41
Tray stoope
Fig.39
1-26 (No.MB075)
Fig.42
3.3 Subwoofer section
r
3.3.1 Removing the amplifier assembly
(See Figs.1 to 3)
(1) From the back side of the speaker main body, remove the
four screws A attaching the heat sink cover and then remove the heat sink cover. (See Fig.1.)
(2) Remove the nine screws B attaching the ampl ifier assem-
bly. (See Fig.2.)
(3) Move the amplifier assembly backward and disconnect the
wire from the connector CN402
board. (See Fig.3.)
3.3.2 Removing the rear panel
(See Figs.1 and 4)
(1) From the back side of the speaker main body, remove the
four screws A attaching the heat sink cover and then remove the heat sink cover. (See Fig.1.)
Reference:
If the amplifier assembly was removed from the main
body, this step (1) is unnecessary.
(2) Remove the four screws C, twelve screws D and screw E
attaching the rear panel. (See Fig.4.)
Rear panel
on the speaker terminal
A
B
Amplifier assembly
B
B
Fig.2
Amplifier assembly Speaker main body
B
Fig.1
A
Heat sink cove
Speaker terminal board
E
C
D
C
D
C
CN402
Fig.3
Rear panel
D
C
D
Fig.4
(No.MB075)1-27
3.3.3 Removing the speaker terminal board
y
(See Figs.5 and 6)
• Remove the amplifier assembly.
• Remove the rear panel.
(1) From the back side of the amplifier assembly, remove the
two screws F attaching the AC bracket. (See Fig.5.)
(2) Disconnect the wires from the connectors CN101
CN102 on the speaker terminal board. (See Figs.5 and 6.)
(3) Disconnect the speaker terminal b oard from the connec-
tors (CN501
Fig.6.)
, CN503, CN504) on the mother board. (See
and
Speaker terminal board
CN101
CN102
F
Amplifier assembl
CN101
F
AC bracket
Fig.5
CN501
CN503
CN504
Mother board
1-28 (No.MB075)
CN102
Speaker terminal board
Fig.6
3.3.4 Removing the mother board
y
(See Figs.7 to 9)
• Remove the rear panel.
• Remove the amplifier assembly.
• Remove the speaker terminal board.
(1) From the inside of the amplifier assembly, disconnect the
wire from the connector CN151
Fig.7.)
(2) Remove the five screws G attaching the mother board.
(See Fig.7.)
(3) Take out the mother board together the amplifier boards
(A,B) and heat sink.
(4) Remove the four screws H attaching the mother board.
(See Fig.8.)
(5) Release the claws a and b of the connectors (CN521
, CN531, CN532) on the mother board using the
CN522
flat-bladed screwdriver or a similar tool, disconnect the
mother board from the connectors (CN251
, CN352) on the amplifier boards (A,B). (See Fig.9.)
CN351
Note:
When releasing the claws a and b of the connectors (CN521
CN522, CN531, CN532) on the mother boa rd, be careful not
to break the claws of the connectors.
Mother board Amplifier assembl
on the mother board. (See
, CN252,
Amplifier board (B)
CN532
,
CN531
,
H
Amplifier board (A)
CN521
CN522
Mother board
H
Fig.8
CN151
Fig.7
CN521
CN522
Claws a
CN252
CN531
CN351
CN532
Claws b
CN352
Mother board
CN251
GG
Heat sink
Amplifier board (B)
Fig.9
Amplifier board (A)
(No.MB075)1-29
3.3.5 Removing the amplifier board (A)
A
A
(See Figs.10 and 11)
• Remove the rear panel.
• Remove the amplifier assembly.
• Remove the speaker terminal board.
• Remove the mother board.
(1) Remove the three screws J attaching the IC bracket. (See
Fig.10.)
(2) Remove the amplifier board (A) from the heat sink together
the IC bracket.
(3) Disengage the engagement sections c. (See Fig.11.)
(4) Slide the amplifier board (A) in the d irection of the arrow
and then disengage the amplifier board (A) from the en-
gagement sections d and e of the IC bracket. (See Fig.11.)
Reference:
After attaching the IC bracket to the amplifier board (A), apply
the bond to the engagement sections c and d. (See Fig.11.)
3.3.6 Removing the amplifier board (B)
(See Figs.10 and 12)
• Remove the mother board.
(1) Remove the three screws K attaching the IC bracket. (See
Fig.10.)
(2) Remove the amplifier board (B) from the heat sink together
the IC bracket.
(3) Disengage the engagement sections f. (See Fig.11.)
(4) Slide the amplifier board (B) in the d irection of the arrow
and then disengage the amplifier board (B) from the en-
gagement sections g and h of the IC bracket. (See Fig.12.)
Reference:
After attaching the IC bracket to the amplifier board (B), apply
the bond to the engagement sections f and g. (See Fig.12.)
mplifier board (A)
d
e
d
IC bracket
1
c
c
Fig.11
f
IC bracket
1
2
2
1
Amplifier board (B)
g
Heat sink
IC bracket
Amplifier board (A)
2
h
2
f
1
Fig.12
g
K
J
IC bracket
mplifier board (B)
Fig.10
1-30 (No.MB075)
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