Jvc TH-C90-UX, TH-C90-US, TH-C90-A Service Manual
SERVICE MANUAL
DVD DIGITAL CINEMA SYSTEM
MB57020069
TH-C90A,TH-C90US,TH-C90UX,
TH-C90UG,TH-C60US,TH-C60UP,
TH-C60UW,TH-C60UX,TH-C60UY,
TH-C60UG
SP-THC90F SP-THC90F
SP-PWC90
SP-THC90S SP-THC90S
SP-THC90C
XV-THC90
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
SP-THC60F SP-THC60F
SP-THC60C
SP-THC60S
SP-PWC60
XV-THC60
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-39
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43
COPYRIGHT © 2006 Victor Company of Japan, Limited
No.MB570
2006/9
SPECIFICATION
Center unit (XV-THC90/XV-THC60)
Audio section Digital input*1 DIGITAL IN (DBS) (OPTICAL) -21 dBm to -15 dBm (660 nm ±30 nm)
Analog input AUX IN (VCR)
Analog output TAPE OUT (Only for XV-THC90)
Video section Video System PAL/NTSC
Horizontal Resolution 500 lines
Signal-to-Noise Ratio 64 dB
Video output level Composite 1.0 V(p-p)/75
S-video-Y 1.0 V(p-p)/75 Ω
S-video-C For PAL: 0.3 V(p-p)/75 Ω
Component-Y 1.0 V(p-p)/75 Ω
Component-PB/PR 0.7 V(p-p)/75 Ω
Video input sensitivity/
Impedance (VCR IN)
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 87.50 MHz to 108.00 MHz
General Power Requirements AC 110 - 240 V , 50/60 Hz (For US, UG, UX)
Power Consumption 25 W (at operation), 1.2 W (in standby mode)
Dimensions (W
Mass 3.8 kg
× H × D) 400 mm × 85 mm × 316 mm
Composite 1.0 V(p-p)/75 Ω
S-video-Y 1.0 V(p-p)/75 Ω
S-video-C For PAL: 0.3 V(p-p)/75 Ω
AM At 10 kHz intervals : 530 kHz to 1 710 kHz (1 600 kHz)*2
TAPE IN (Only for XV-THC90)
Ω
For NTSC: 0.286 V(p-p)/75 Ω
For NTSC: 0.286 V(p-p)/75 Ω
At 9 kHz intervals : 531 kHz to 1 710 kHz (1 602 kHz)*2
AC 240 V , 50 Hz (For A)
AC 110-240 V , 50/60 Hz (For UW)
*1: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz)
*2: For the countries of the Middle East
Subwoofer (SP-PWC90)
Amplifier section Front/Center/Surround 140 W per channel, RMS at 4
Subwoofer 300 W, RMS at 4
Speaker section Speaker unit 25 cm Bass-reflex
Power Handling Capacity 300 W
Impedance 4
Frequency Range 25 Hz to 200 Hz
Sound Pressure Level 74 dB/W·m
General Power Requirements AC 110 V/ AC 127 V/ AC 220 - 240 V , 50/60 Hz
Power Consumption 110 W (at operation), 0 W (in standby mode)
Dimensions (W
Mass 17.6 kg
× H × D) 264 mm × 481 mm × 459 mm
Ω
Ω at 40 Hz, with 10 % total harmonic distortion.
Ω at 1 kHz, with 10 % total harmonic distortion.
Subwoofer (SP-PWC60)
Amplifier section Front/Center/Surround 135 W per channel, RMS at 4
Subwoofer 135 W, RMS at 4
Speaker section Speaker unit 16 cm Bass-reflex
Power Handling Capacity 140 W
Impedance 4
Frequency Range 30 Hz to 200 Hz
Sound Pressure Level 75 dB/W·m
General Power Requirements AC 110 V/ AC 127 V/ AC 220 - 240 V , 50/60 Hz
Power Consumption 135 W (at operation), 0 W (in standby mode)
Dimensions (W
Mass 12.3 kg
× H × D) 171 mm × 411 mm × 458 mm
Ω
Ω at 100 Hz, with 10 % total harmonic distortion.
Ω at 1 kHz, with 10 % total harmonic distortion.
1-2 (No.MB570)
Satellite Speakers (SP-XTHC90)
Front speakers (SP-THC90F) Type 2-way 3-speaker Bass reflex type (Magnetically shielded Type)
Speaker 13.5 cm cone
Power Handling Capacity 140 W
Impedance 4
Frequency Range 60 Hz to 20 000 Hz
Sound Pressure Level 89 dB/W·m
Dimensions (W
Mass 8.8 kg each
Center speaker (SP-THC90C) Type 2-way 3-speaker Bass reflex type (Magnetically shielded Type)
Speaker 10.5 cm cone
Power Handling Capacity 140 W
Impedance 4
Frequency Range 65 Hz to 20 000 Hz
Sound Pressure Level 89 dB/W·m
Dimensions (W
Mass 3.8 kg
Surround speakers (SP-THC90S) Type 2-way Bass reflex type
Speaker 10.5 cm cone
Power Handling Capacity 140 W
Impedance 4
Frequency Range 75 Hz to 20 000 Hz
Sound Pressure Level 81 dB/W·m
Dimensions (W
Mass 1.7 kg each
× H × D) 270 mm × 1 027.5 mm × 320 mm
× H × D) 400 mm × 141 mm × 171.5 mm
× H × D) 140 mm × 228.5 mm × 174 mm
Ω
Ω
Ω
× 2, 6.0 cm cone × 1
× 2, 4.0 cm cone × 1
× 1, 4.0 cm cone × 1
Satellite Speakers (SP-XTHC60)
Front speakers (SP-THC60F) Type 1-way 2-speaker Bass reflex type (Magnetically shielded Type)
Speaker 5.5 cm cone
Power Handling Capacity 140 W
Impedance 4
Frequency Range 100 Hz to 20 000 Hz
Sound Pressure Level 79 dB/W·m
Dimensions (W
Mass 3.3 kg each
Center speaker (SP-THC60C) Type 1-way 2-speaker Bass reflex type (Magnetically shielded Type)
Speaker 6.5 cm cone
Power Handling Capacity 140 W
Impedance 4
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 82 dB/W·m
Dimensions (W
Mass 0.8 kg
Surround speakers (SP-THC60S) Type 2-way 3-speaker Bass reflex type
Speaker 5.5 cm cone
Power Handling Capacity 140 W
Impedance 4
Frequency Range 100 Hz to 20 000 Hz
Sound Pressure Level 79 dB/W·m
Dimensions (W
Mass 3.4 kg each
× H × D) 280 mm × 1 106 mm × 280 mm
× H × D) 250 mm × 85 mm × 91 mm
× H × D) 280 mm × 1 114 mm × 280 mm
Ω
Ω
Ω
× 2
× 2
× 2, 3.0 cm dome × 1
Designs & specifications are subject to change without notice.
(No.MB570)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.MB570)
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 card wire is disconnected from the connecto on the servo board. (If the card 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 card wire.
Soldering point
Motor
Double
face tape
Card wire
(No.MB570)1-5
1.8 Important for laser products
1.CLASS 1 LASER PRODUCT
2.CAUTION :
(For U.S.A.) Visible and/or invisible class II laser radiation
when open. Do not stare into beam.
(Others) Visible and/or invisible class 1M laser radiation
when open. Do not view directly with optical instruments.
3.CAUTION : Visible and/or invisible laser radiation when
open and inter lock failed or defeated. Avoid direct
exposure to beam.
4.CAUTION : This laser product uses visible and/or invisible
laser radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified here in may result in
hazardous radiation exposure.
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
REPRODUCTION AND POSITION OF LABELS and PRINT
WARNING LABEL and PRINT
1-6 (No.MB570)
CLASS 1
LASER PRODUCT
CLASS 1
LASER PRODUCT
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 Extension cable for subwoofer
Please use the extension cable described to Service Bulletin (No. MB-SB-00018-2) when you service.
It is an extension cable for the subwoofer.
Parts No. Parts name Amount used
EXTPWC5-14P Extension cable 2
EXTPWM505-09P Extension cable 1
Amp. board
Mother board
(No.MB570)1-7
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the Metal cover
(See Fig. 1, 2)
(1) Remove the three screws A attaching the Metal cove from
back side. (See fig. 1)
(2) Remove the four screws B attaching the Metal cover from
both side. (See Fig. 2)
A
Fig.1
B
B
Fig.2
1-8 (No.MB570)
3.1.2 Removing the Front panel assembly
(See Fig. 3 to 5)
(1) Disconnect the card wires from Front panel assembly con-
nected to connectors CN450
of the main board assembly. (See Fig. 3)
(2) Remove the one screw C attaching the earth wire to Main
board assembly. (See Fig. 3)
(3) Remove the two screws D attaching the Front panel as-
sembly from bottom side. (See Fig. 4)
(4) Disengage the hook a from the bottom chassis. (See Fig.
4)
(5) Disengage the hook b and c from the both side of the bot-
tom chassis. (See Fig. 5)
, CN457, CN455 and CN451
CN450
C
D
CN457
CN455
Fig.3
Fig.4
CN451
a
bc
Fig.5
(No.MB570)1-9
3.1.3 Removing the Audio & Digital input board assembly
(See Fig. 6 to 8)
(1) Disconnect the card wire from Main board connected to
connector CN102 of the Audio & Digital input board assembly. (See Fig. 6)
(2) For TH-C90, remove the one screw E and two screws F at-
taching the Audio & Digital input board assembly. (See Fig.
7)
(3) For TH-C60, remove the one screw G and one screw H at-
taching the Audio & Digital input board assembly. (See Fig.
8)
(4) Disconnect the board to board connector CN101
ed to connection board and then pull and lift up to direction
of the arrow then take out the Audio & Digital input board
assembly. (See Fig. 6)
connect-
Audio&Digital input board
CN102
CN101
E
Fig.6
F
Fig.7
H
1-10 (No.MB570)
G
Fig.8
3.1.4 Removing the Tuner pack
(See Fig. 9, 10)
(1) Disconnect the card wire from Tuner pack connected to
connector CN410
(2) Remove the two screws J attaching the Tuner pack. (See
Fig. 10)
of the Main board assembly. (See Fig. 9)
Tuner
CN410
Fig.9
J
Fig.10
(No.MB570)1-11
3.1.5 Removing the Main board assembly
(See Fig. 11, 12)
(1) Disconnect the card wires from DVD servo board assembly
connected to connector CN402, CN403 and CN404 of the
Main board assembly. (See Fig. 11)
(2) Remove the four screws K attaching the Main board as-
sembly. (See Fig. 11)
(3) Remove the four screws L attaching the Main board as-
sembly from back side. (See Fig. 12)
K
CN402
Main board
K
CN403
L
CN404
K
Fig.11
Fig.12
1-12 (No.MB570)
3.1.6 Removing the USB jack board assembly
(See Fig. 13)
(1) Disconnect the connector wire from USB jack board as-
sembly connected to connector CN811
board assembly.
(2) Remove the one screw M attaching the USB jack board as-
sembly.
of the DVD servo
CN811
3.1.7 Removing the DVD changer mechanism assembly
(See Fig. 14)
(1) Remove the four screws N attaching the DVD changer
mechanism assembly.
USB jack board
N
M
Fig.13
N
Fig.14
(No.MB570)1-13
3.1.8 Removing the Operation board assembly
(See Fig. 15)
(1) Remove the one screw P attaching the bracket board.
(2) Remove the four screws Q attaching the Operation board.
3.1.9 Removing the Front board assembly
(See Fig. 15, 16)
(1) Remove the bracket board.
(2) Remove the Operation board assembly.
(3) Remove the volume knob.
(4) Remove the one screw R attaching the Front board assem-
bly. (See Fig.16)
(5) Remove the eight screws S attaching the Front board as-
sembly.
S
QQ
Operation board
S
S
T
S
P
Front board
3.1.10 Removing the Mic jack board assembly
(See Fig. 15)
(1) Remove the mic volume knob.
(2) Remove the two screws T attaching the Mic jack assembly.
S
Fig.15
R
Fig.16
1-14 (No.MB570)
3.2 DVD mechanism section
3.2.1 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)
3.2.2 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,
CN451
Fig.1
C PWB BKTWire holder
AA
CN101CN452
CN201CN453
Fig.2
B
(No.MB570)1-15
3.2.3 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
a
Tray assembly
(Tray 5)
b
Fig.6
Rod
Lifter assembly
1-16 (No.MB570)
a
Fig.4
Fig.7
3.2.4 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
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.
3.2.5 Removing the DVD tramecha assembly
(See Fig.9)
(1) Remove the three screws E attaching the DVD tramecha
assembly.
on the motor
on the motor
CN2
CN1
d
Soldering point
DD
Motor
Double
face tape
Card wire
Fig.8
E
E
E
DVD Tramecha assembly
Fig.9
(No.MB570)1-17
3.2.6 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
1-18 (No.MB570)
3.2.7 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
K
Tray switch board
Fig.14
(No.MB570)1-19
f
3.2.8 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
1-20 (No.MB570)
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
(No.MB570)1-21
3.2.9 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 hook. (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
1-22 (No.MB570)
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
(No.MB570)1-23
3.2.10 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
1-24 (No.MB570)
Rack holder
assembly
N
v
u
N
Fig.26
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
SV resister
Fig.28
(No.MB570)1-25
3.2.11 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
1-26 (No.MB570)
3.2.12 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
Fig.34
Sub tray
(No.MB570)1-27
3.3 Subwoofwer (SP-PWC90)
3.3.1 Removing the amplifier assembly
(See Figs.1 to 3)
(1) From the back side of the speaker main body, remove
three screws A attaching the amplifier assembly. (See
Fig.1.)
(2) From the bottom side of the speaker main body, remove
the eight screws B attaching amplifier assembly. (See
Fig.2.)
(3) From the top side of the speaker main body, move the am-
plifier assembly backward and disconnect the wire from the
connector CN352
(4) Take out the amplifier assembly.
on the relay board. (See Fig.3)
A
Amplifier assembly
Fig.1
Speaker main body
Relay board
B
B
Fig.2
CN352
Wire
1-28 (No.MB570)
Amplifier assembly
Fig.3
3.3.2 Removing the rear panel
(See Figs.4 and 5)
• Prior to performing the following procedure, remove the ampli-
fier assembly.
(1) From the back side of the amplifier assembly, remove the
six screws C and screw D attaching the rear panel. (See
Fig.4.)
(2) Take out the rear panel with fan motor backward from the
amplifier assembly.
(3) From the top side of the amplifier assembly, disconnect the
fan wire from the connector CN308
(See Fig.5.)
(4) Take out the rear panel.
on the main board.
3.3.3 Removing the fan motor
(See Fig.6)
• Prior to performing the following procedures, remove the am-
plifier assembly and rear panel.
(1) From the front side of the rear panel, remove the four
screws E attaching the fan motor.
(2) Take out the fan motor.
Rear panel
CN308
CDC
Fig.4
Main board
Fan motor Rear panelFan wire
Fig.5
Rear panel
Fig.6
(No.MB570)1-29
3.3.4 Removing the power board
(See Figs.7 to 9)
• Prior to performing the following procedures, remove the am-
plifier assembly and rear panel.
(1) From the top side of the amplifier assembly, disconnect the
wires from the connectors (CN103
board. (See Fig.7)
(2) Disconnect the power cord from the connector CN101
the power board, and take out the power cord. (See Fig.7)
(3) Remove the five screws F, screw F' and two screws G at-
taching the power board. (See Figs.7 and 8.)
Reference:
When attaching the screw F', attach it with the earth wire.
(See Fig.8.)
(4) From the right side of the amplifier assembly, remove the
two screws H attaching the power board. (See Fig.9)
(5) From top side of the amplifier assembly, disconnect the
power board from the connectors (CN301
) on the main board, and take out the power board
CN304
from the amplifier assembly. (See Fig.8)
, CN151) on the power
on
, CN302 and
CN151
Power board
Fig.7
CN101
F
Power cord
CN103
Earth wire
Power board
G F' F G
CN302
CN304 CN301
Power board
Main board
Fig.8
H
1-30 (No.MB570)
Fig.9
Loading...