JVC THC-30-J Service manual
SERVICE MANUAL
DVD DIGITAL THEATER SYSTEM
MB50620063
TH-C30J,TH-C30C,
TH-C20J,TH-C20C
SP-THC40C
SP-THC40F
SP-PWC30
SP-THC40S
SP-THC20F
XV-THC30
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
SP-THC20C
SP-THC20S
SP-PWC20
XV-THC20
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
COPYRIGHT © 2006 Victor Company of Japan, Limited
No.MB506
2006/3
SPECIFICATION
Center unit (XV-THC30/XV-THC20)
Audio section Total Harmonic Distortion *1 0.02%
Digital input *2 DIGITAL IN (DBS) (OPTICAL) : -21 dBm to -15 dBm (660 nm ± 30 nm)
Video section Video System NTSC
Horizontal Resolution 500 lines
Signal-to-Noise Ratio 64 dB
Video output level Composite : 1.0 V(p-p)/75
Video input sensitivity/Impedance (VCR IN) Composite : 1.0 V(p-p)/75 Ω
USB storage USB specification Compatible with the USB 2.0 Full-Speed
Compatible device Mass Storage Class
Compatible file system FAT16, FAT32
Bus power supply Max. 500 mA
Tuner section Tuning Range FM : 87.5 MHz to 108.0 MHz
General Power Requirements AC 120 V , 60 Hz
Power Consumption 25 W (at operation)
Dimensions (W
Mass 3.8 kg (8.4 lbs)
× H × D) 400 mm × 85 mm × 316 mm (15-3/4 inches × 3-3/8 inches × 12-1/2 inches)
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
S-video-Y : 1.0 V(p-p)/75 Ω
S-video-C : 0.286 V(p-p)/75 Ω
AM : 530 kHz to 1 710 kHz
0.6 W (in standby mode)
Ω
*1: This value is measured at System cord CONNECTOR for reference.
*2: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz)
Subwoofer (SP-PWC30)
Amplifier section Front/Center/Surround 167 W per channel, RMS at 3
Subwoofer 167 W, RMS at 3
Speaker section Speaker unit 16 cm (6-5/16 inches) Bass-reflex
Power Handling Capacity 170 W
Impedance 3
Frequency Range 30 Hz to 200 Hz
Sound Pressure Level 73 dB/W·m
General Power Requirements AC 120 V , 60 Hz
Power Consumption 160 W (at operation)
Dimensions (W
Mass 11.5 kg (25.4 lbs)
× H × D) 170 mm × 411 mm × 458 mm (6-3/4 inches × 16-3/16 inches × 18-1/16 inches)
Ω
0 W (in standby mode)
Ω at 100 Hz, with 10 % total harmonic distortion.
Ω at 1 kHz, with 10 % total harmonic distortion.
Subwoofer (SP-PWC20)
Amplifier section Front/Center/Surround 135 W per channel, RMS at 4
Subwoofer 135 W, RMS at 4
Speaker section Speaker unit 16 cm (6-5/16 inches) Bass-reflex
Power Handling Capacity 140 W
Impedance 4
Frequency Range 30 Hz to 200 Hz
Sound Pressure Level 74 dB/W·m
General Power Requirements AC 120 V , 60 Hz
Power Consumption 135 W (at operation)
Dimensions (W
Mass 11.5 kg (25.4 lbs)
× H × D) 170 mm × 411 mm × 458 mm (6-3/4 inches × 16-3/16 inches × 18-1/16 inches)
Ω
0 W (in standby mode)
Ω at 100 Hz, with 10 % total harmonic distortion.
Ω at 1 kHz, with 10 % total harmonic distortion.
1-2 (No.MB506)
Satellite Speakers - SP-XTHC30
Front speakers
(SP-THC40F)
Center speaker
(SP-THC40C)
Surround speakers
(SP-THC40S)
Type 2-way 2-speaker Bass reflex type (Magnetically shielded Type)
Speaker 8.0 cm (3-3/16 inches) cone
Power Handling Capacity 170 W
Impedance 3
Frequency Range 80 Hz to 20 000 Hz
Sound Pressure Level 77 dB/W·m
Dimensions (W
Mass 0.56 kg (1.3 lbs) each
Type 2-way 2-speaker Bass reflex type (Magnetically shielded Type)
Speaker 8.0 cm (3-3/16 inches) cone
Power Handling Capacity 170 W
Impedance 3
Frequency Range 80 Hz to 20 000 Hz
Sound Pressure Level 77 dB/W·m
Dimensions (W
Mass 0.57 kg (1.3 lbs)
Type 1-way Bass reflex type
Speaker 8.0 cm (3-3/16 inches) cone
Power Handling Capacity 170 W
Impedance 3
Frequency Range 80 Hz to 20 000 Hz
Sound Pressure Level 70 dB/W·m
Dimensions (W
Mass 0.56 kg (1.3 lbs) each
× 1
1.5 cm (5/8 inches) dome
× 1
Ω
× H × D) 104.5 mm × 139 mm × 101 mm (4-1/8 inches × 5-1/2 inches × 4 inches)
× 1
1.5 cm (5/8 inches) dome
× 1
Ω
× H × D) 137 mm × 105 mm × 104.5 mm (5-7/16 inches × 4-3/16 inches × 4-1/8 inches)
× 1
Ω
× H × D) 111.5 mm × 148 mm × 106.5 mm (4-7/16 inches × 5-7/8 inches × 4-1/4 inches)
Satellite Speakers - SP-XTHC20
Front speakers
(SP-THC20F)
Center speaker
(SP-THC20C)
Surround speakers
(SP-THC20S)
Type 1-way Bass reflex type (Magnetically shielded Type)
Speaker 8.0 cm (3-3/16 inches) cone
Power Handling Capacity 140 W
Impedance 4
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 78 dB/W·m
Dimensions (W
Mass 0.55 kg (1.3 lbs) each
Type 1-way Bass reflex type (Magnetically shielded Type)
Speaker 8.0 cm (3-3/16 inches) cone
Power Handling Capacity 140 W
Impedance 4
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 78 dB/W·m
Dimensions (W
Mass 0.55 kg (1.3 lbs)
Type 1-way Bass reflex type
Speaker 8.0 cm (3-3/16 inches) cone
Power Handling Capacity 140 W
Impedance 4
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 76 dB/W·m
Dimensions (W
Mass 0.63 kg (1.4 lbs) each
× 1
Ω
× H × D) 106 mm × 119.5 mm × 102 mm (4-3/16 inches × 4-3/4 inches × 4-1/16 inches)
× 1
Ω
× H × D) 106 mm × 119.5 mm × 102 mm (4-3/16 inches × 4-3/4 inches × 4-1/16 inches)
× 1
Ω
× H × D) 106 mm × 119.5 mm × 102 mm (4-3/16 inches × 4-3/4 inches × 4-1/16 inches)
Designs & specifications are subject to change without notice.
(No.MB506)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 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 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.).
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 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 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.
1-4 (No.MB506)
1.5 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.
1.5.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(caption)
Anti-static wrist strap
1M
Conductive material
(conductive sheet) or iron palate
(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.
1.6 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.
1.7 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexible
wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire.
Soldering point
Motor
Double
face tape
Card wire
(No.MB506)1-5
1.8 Importance administering point on the safety
D956
T901
C916
C909
C914
C908
D903
D902
R901
B4146
C907
B4301
B4217
TH901
R922
P901
B4135
C913
C902
D901
FC902
C903
FC901
B4302
R903
D904
B4101
B4202
HS901
IC901
B4701
B4507
L901
R921
slow blow type / type a fusion lent
D992
R951
B4151
W914
PC901
C992
C912
C911
C904
D4705
W921
Q982
R982
C905
C4431
B4403
B4150
B4149
B4113
B4207
B4218
B4407
B4201
R4708
B4133
D4811
B4605
B4211
B4320
B4212
B4321
R4811
B4138
B4139
B4306
B4140
B4141
B4214
B4802
R973
B4305
Q983
C983
D981
C4451
C4441
S901
B5201
C3715
B5301
B5406
CN102
B5803
D535
D101
RY101
R555
B5306
CN274
B5021
D506
B5004
B2023
L2102
R2115
C503
C523
D514
D510
B5219
B5022
FW501
CN151
B5225
FC155
B2214
B2215
FC156
C101
CN101
B5041
R685
B5042
R686
B5505
D515
B5607
D516
C512
B5220
B5221
B5504
D151
FC157
D152
FC158
B5222
D154
D153
CN371
C3720
FC103 FC104
C3716
B5024
B5025
FC101
FC102
C3503
B5040
D3501
B5502
D601
HS151
D3502
B5003
B5901
B5002
B5102
B5208
B5206
B5207
B5402
B5605
B5218
C162
C161
B5304
B5305
C164
C163
D3706
D3707
R3727
B5043
R3719
C3721
R3720
Q3704
D3703
D3708
B5112
C3602
B5036
C3502
B5035
CN372
D3601
D3602
B5302
B5202
B5001
C3604
C3504
B5701
B5203
B5101
B5204
B5205
B5106
D549
D550
B5606
B5802
D541
D551
B5303
B5223
B5224
CN502
fast blow type / type a fusion rapide
Full Fuse Replacement Marking
Graphic symbol mark
(This symbol means slow blow type fuse.)
should be read as follows ;
FUSE CAUTION
FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ONLY WITH SAME TYPE
AND RATING OF FUSES ;
F901 : T1AH 250V F901 : T1AH 250V
Full Fuse Replacement Marking
Graphic symbol mark
(This symbol means fast blow type fuse.)
should be read as follows ;
FUSE CAUTION
FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ONLY WITH SAME TYPE
AND RATING OF FUSES ;
Marquage Pour Le Remplacement
Complet De Fusible
Le symbole graphique (Ce symbole signifie
fusible de type a fusion lent.)
^
doit etre interprete comme suit ;
PRECAUTIONS SUR LES FUSIBLES
POUR UNE PROTECTION CONTINUE CONTRE
DES RISQUES D'INCENDIE, REMPLACER
SEULEMENT PAR UN FUSIBLE DU MEME TYPE ;
Marquage Pour Le Remplacement
Complet De Fusible
Le symbole graphique (Ce symbole signifie
fusible de type a fusion rapide.)
^
doit etre interprete comme suit ;
PRECAUTIONS SUR LES FUSIBLES
POUR UNE PROTECTION CONTINUE CONTRE
DES RISQUES D'INCENDIE, REMPLACER
SEULEMENT PAR UN FUSIBLE DU MEME TYPE ;
1-6 (No.MB506)
F101 : 8A 125V
F153 : 10A 125V
F154 : 10A 125V
F101 : 8A 125V
F153 : 10A 125V
F154 : 10A 125V
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.MB506)1-7
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the top cover
(See Fig.1 and 2)
(1) Remove the four screws A (both side) attaching the top
cover. (See Fig.1)
(2) Remove the three screws B attaching the top cover from
back side. (See Fig.2)
A
A
Fig.1
G
B
G
F
J
Fig.2
1-8 (No.MB506)
3.1.2 Removing the front panel assembly
(See Fig.3 to 5)
(1) Disconnect the card wire from front board connected
and CN451 of main board. (See Fig.3)
CN450
(2) Disconnect the card wire from operation board connected
of main board. (See Fig.3)
CN457
(3) Remove the one screw C attaching the grand wire of front
board. (See Fig.3)
(4) Remove the two screws D attaching the front panel from
bottom side. (See Fig.4)
(5) Disengage the hook a of bottom side and hook b of both
side of front panel assembly. (See Fig.4 and 5)
CN451 CN457 CN450
C
D
Fig.3
Fig.4
b
a
Fig.5
b
(No.MB506)1-9
3.1.3 Removing the DVD mechanism assembly
(See Fig. 6 and 7)
(1) Disconnect the card wire from DVD mechanism assembly
connected to CN402, CN403 and CN404 of main board.
(See Fig.6)
(2) Disconnect the connector wire from USB jack board con-
nected to CN811
(3) Remove the four screws E attaching the DVD mechanism
assembly. (See Fig.6)
of DVD module board. (See Fig.7)
E
CN402
CN403
CN404
E
Fig.6
CN811
3.1.4 Removing the tuner pack
(See Fig.2 and 8)
(1) Disconnect the card wire from tuner pack connected to
of main board. (See Fig.8)
CN410
(2) Remove the two screws F attaching the tuner pack. (See
Fig.2)
Fig.7
CN410
Fig.8
1-10 (No.MB506)
3.1.5 Removing the audio and digital input board
(See Fig.2 and 9)
(1) Remove the two screws G attaching the audio and digital
input board. (See Fig.2)
(2) Disconnect the card wire from main board connected to
. (See Fig.9)
CN102
(3) Disconnect the connection board from CN101
shift to direction the arrow and take off the audio and digital
input board. (See Fig.9)
, and then
CN101
CN102
3.1.6 Removing the USB jack board
(See Fig.10)
(1) Remove the one screw H attaching the USB jack board.
(See Fig.10)
Fig.9
H
Fig.10
(No.MB506)1-11
3.1.7 Removing the main board
(See Fig.2 and 11)
(1) Remove the five screws J attaching the main board from
back side. (See Fig.2)
(2) Remove the four screws K attaching the main board. (See
Fig.11)
3.1.8 Removing the operation board
(See Fig.12 and 13)
(1) Pull out the volume knob.
(2) Remove the one screw L attaching the volume. (See
Fig.12)
(3) Remove the one screw M attaching the bracket board.
(See Fig.13)
(4) Remove the three screws N attaching the operation board.
(See Fig.13)
K
Fig.11
L
3.1.9 Removing the front board
(See Fig.13)
(1) Remove the seven screws P attaching the front board.
Fig.12
N
M
P
Fig.13
1-12 (No.MB506)
3.2 Subwoofer
3.2.1 Removing the amplifier assembly
(See Fig.1 to 4)
(1) Remove the eight screws A attaching the amplifier assem-
bly from bottom side. (See Fig.1)
(2) Remove the two screws B, one screw C and six screws D
attaching the rear panel. (See Fig.2)
(3) Disconnect the connector wire from fan motor connected to
. (See Fig.3)
CN371
(4) Pull out the amplifier assembly and disconnect the connec-
tor wire from speaker connected to CN274
. (See Fig.4)
A
A
Fig.1
CN371
Fig.3
D
B
C
CN274
Fig.4
D
D
Fig.2
(No.MB506)1-13
3.2.2 Removing the mother board
(See Fig.5 and 6)
(1) Disconnect the connector wire from power transformer
connected to CN102 and CN151. (See Fig.5)
(2) Disconnect the power cord connected to CN101. (See
Fig.5)
(3) Remove the four screws E attaching the heat sink bracket.
(See Fig.5)
(4) Remove the two screws F attaching the mother board.
(See Fig.5)
(5) Disconnect the connector connected to amplifier board
, CN501 and CN502. (See Fig.6)
CN372
E
3.2.3 Removing the amplifier board
(See Fig.7)
(1) Remove the nine screws G attaching the amplifier board.
CN102
CN101
CN151
F
Fig.5
CN372 CN501 CN502
Fig.6
E
1-14 (No.MB506)
G
Fig.7
3.2.4 Removing the heat sink
(See Fig.8 and 9)
(1) Remove the three screws H attaching the heat sink from
bottom side of amplifier board. (See Fig.8)
(2) Remove the four screws J attaching the power IC. (See
Fig.9)
H
Fig.8
J
Fig.9
(No.MB506)1-15
3.3 DVD mechanism section
3.3.1 Removing the DVD module board
(See Fig.1)
(1) Disconnect the card wire connected to CN451
, CN101 and CN102 of DVD module board. (See
CN453
Fig.1)
(2) Remove the two screws A attaching the DVD module
board. (See Fig.1)
, CN452,
CN451
AA
3.3.2 Removing the PWB bracket and wire holder
(See Fig.2)
(1) Remove the two screws B attaching the wire holder.
(2) Remove the one screw C attaching the PWB bracket.
CN452
CN453
CN201
Fig.1
C PWB BKTWire holder
Fig.2
CN101
B
1-16 (No.MB506)
3.3.3 Removing the tray assembly
r
(See Fig.3 to 7)
(1) Remove the two screws D from the top cover and release
the two joints a on both sides of the body. (See Fig.3)
(2) Remove the top cover with the two rods attached to the top
cover and lifter assembly respectively. (See Fig.4)
(3) Remove the open detect lever on the left side of the body.
(See Fig.5)
(4) Push part b of the slide (R) assembly on the right side of
the body to unlock the tray assembly. Draw out the trays toward the front. (See Fig.6)
Attention:
The tray can be locked if all tray assemblies are attached.
(5) From top of the body, move the stopper tab c in the direc-
tion of the arrow and release. Pull out the tray assemblies
from the body. (See Fig.6 and 7)
Caution:
Remove the tray assembly from top tray 5 in order.
Attention:
When reattaching the sub tray of the tray assembly, or when
removing the DVD mechanism inside, refer to another section.
Top cover
Open detect leve
Fig.5
c
D
a
Lifter assembly
a
Rod
Fig.3
Top cover
D
Rod
a
Tray assembly
(Tray 5)
b
Fig.6
Lifter assembly
a
Fig.4
Fig.7
(No.MB506)1-17
3.3.4 Removing the motor board
(See Fig.8)
(1) Remove the two screws D attaching the motor board.
(2) Remove the spacer fixing the motor board and tray switch-
board, and disconnect the connector CN2 on the motor
board.
(3) Disconnect the card wire from connector CN1
board.
Caution:
When reconnection the card wire, let the card wire through the
slot d of the motor board and attach it to bottom of the body using a double face tape.
3.3.5 Removing the DVD tramecha assembly
(See Fig.9)
(1) Remove the three screws E attaching the DVD tramecha
assembly.
on the motor
CN2
CN1
d
Soldering point
DD
Motor
Double
face tape
Card wire
Fig.8
E
1-18 (No.MB506)
E
E
DVD Tramecha assembly
Fig.9
3.3.6 Removing the pickup
(See Fig.10 and 11)
(1) Remove the one screw F and G attaching the spring hold-
er. (See Fig.10)
(2) Lift up the shaft from the tramecha assembly. (See Fig.10)
(3) Remove the two screws H attaching the lack. (See Fig.11)
e
Mecha base
Shaft
Pickup assembly
F
G
Spring holder
Shaft
H
Spring
holder
Fig.10
Fig.11
(No.MB506)1-19
3.3.7 Removing the side (L)
r
(See Fig.12 to 14)
(1) Remove the two screws J attaching the side (L). (See
Fig.12)
(2) From the side of body, remove the spacer fixing the tray
switch board and motor board. Disconnect connector CN3
on the tray switch board and detach the side (L) upward.
(See Fig.13)
(3) Remove the one screw K attaching the tray switch board.
(See Fig.14)
(4) Push the joint tab d of the side (L) in the direction of the ar-
row and remove the tray switch board outward, then release joint f. (See Fig.14)
J
Side (L)
J
J
Side (L)
Fig.12
J
Space
CN3
Side (L)
Fig.13
e
1-20 (No.MB506)
f
K
Tray switch board
Fig.14
3.3.8 Removing the side (R) assembly
(See Fig.15 to 19)
(1) Remove the three screws L attaching the side (R) assem-
bly. (See Fig.15)
(2) Remove the spring attached to part g of the hook on the
right side of the body. (See Fig.16)
(3) Push and release the two tabs h of the gear cover through
the notches inside the side (R) assembly. Remove the gear
cover outward. (See Fig.17)
(4) From top of the body, turn the 1 gear clockwise to move the
elevator cam rearward. Move the two slots k and joint m of
the elevator cam as shown Fig.18 and remove the elevator
cam outward.
(5) Remove the three screws M and detach the side (R) up-
ward. (See Fig.19)
Caution:
When reattaching the side (R) assembly, make sure to fit the
shaft into the slot of the select lever.
Mh
M
Side (R)
assembly
M
Fig.15
(No.MB506)1-21
Side (R) assembly
Gear cover
Sprihg
g
1 gear
Spring
k
Fig.18
j
Elevator cam
k
m
Elevator com
Side (R) assembly
Fig.16
Fig.17
M
Side (R) assembly
h
M
Fig.19
1-22 (No.MB506)
3.3.9 Removing the lifter assembly
(See Fig.20 to 24)
(1) From top of the body, turn the 1 gear clockwise to move the
lifter assembly upward. (See Fig.20)
(2) From top of the body, turn 2 gear clockwise to move the
hook toward the front until it stops. (See Fig.20)
(3) Move the hook stopper in the direction of the arrow while
pushing the tab n of the hook stopper to unlock it. Release
four joints p to detach from rack holder. Release the rod
from part q. (See Fig.21 and 22)
(4) Turn 1 gear clockwise again to move the lifter assembly up-
ward. (See Fig.23)
(5) Remove the lifer assembly from the body upward at posi-
tion r where the four pins on the right and left sides of the
lifter assembly fit to the notches of the s. Move the lifter assembly toward the front and release from the gook. (See
Fig.23 and 24)
Hook
stopper
Hook
2 gear
1 gear
Lifter
assembly
Fig.20
Lifter assembly
1 gear
2 gear
Hook stopper
Hook
Fig.21
(No.MB506)1-23
Hook
Lifter assembly
1 gear
q
r r
p
Rod
r
r
s
Fig.23
Lifter assembly
p
p
n
p
Hook stopper
Fig.22
s
Fig.24
1-24 (No.MB506)
3.3.10 Removing the rack holder assembly / sensor assembly
(See Fig.25 to 30)
Attention:
If the slide gear of the body places at joint u of the rack holder
assembly, turn the 1 gear counterclockwise to move the slide
gear toward the front. Remove the rack holder assembly.
(1) Remove the three screws N attaching the rack holder as-
sembly. Release joint u from the notch.
Caution:
When reattaching the rack holder assembly, do not nip
the wire v extending from the sensor assembly.
(2) Move the sensor assembly in the direction of the arrow to
release from slot at joint y.
(3) Remove the spring attached to the bottom of the sensor as-
sembly from the boss z on the sensor slider.
(4) Remove the screw P and Q attaching the sensor board and
SV resister respectively. If necessary, unsolder the sensor
board.
Caution:
When reattaching the SV resister, attach the sensor slider to
the sensor bracket and fit the lever on the bottom of the SC resister into slot a' of the sensor slider.
Caution:
When reattaching the rack holder assembly, turn the 1 gear
clockwise to move the slide gear and slide lever inside the
body rearward.
• Let the wire extending from the sensor assembly through
notch x to the bottom of the body.
•Fix pin c' of the slide lever into hole b' on the sensor slider
on the bottom of the sensor assembly while attaching the
spring to the boss z of the sensor slider.
• Engage joint y of the sensor assembly to the notch of the
body.
N
N
Switch board
Fig.25
1 gear
Rack holder
assembly
N
v
u
N
Fig.26
(No.MB506)1-25
Rack holder
assembly
u
Rack holder
assembly
Sensor slider
SV resister
Q
w
Soldering
point
x
P
Sensor board
v
Q
R
u
Fig.27
Rack holder
assembly
Sensor board
Soldering point
Sensor slider
w
Slide gear
Sensor slider
Fig.29
R
R
x
y
Slide lever
Fig.30
1-26 (No.MB506)
SV resister
Fig.28
3.3.11 Removing the motor
(See Fig.31 and 32)
Attention:
You need not to remove the tray assembly, and in such case,
move it.
(1) Remove the two belts on top of the body.
(2) Remove the two screws S attaching the motor.
(3) Remove the motor from the bottom of the body.
Attention:
When removing the motor board with the motor, you need not
to unsolder four solder parts.
Caution:
When reattaching the motor, turn the side where the label
should bu put to te front side.
Motor Motor
R
Belt Belt
R
Label
Fig.31
Fig.32
(No.MB506)1-27
3.3.12 Taking out the disc in play mode
r
(See Fig.33 to 36)
Attention:
Refer to "Removing the tray assembly".
(1) Remove the top cover upward.
(2) Unlock the tray assembly and draw out the tray assembly
toward the front.
(3) From top of the body, turn the 1 gear clockwise to move the
lifter assembly upward.
(4) From top of the body, turn 2 gear clockwise to move the
sub tray remaining inside the lifter assembly toward the
front, then pull out.
(5) Take out the disc on the sub tray.
(6) After clearing away the disc, insert the sub tray into the
main tray.
Caution:
When reattaching the sub tray, move the tray stopper on
the bottom of the tray in the direction of the arrow to lock
the sub tray certainly.
(7) Push the tray assembly toward to body and reattach.
Tray assembly
Tray stopper
Main tray
2 gear
Fig.33
Tray assembly
Sub tray
Fig.35
1 gear
Tray stoppe
Sub tray
Fig.36
1-28 (No.MB506)
Sub tray
Fig.34
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