JVC RX-DV31SL User manual

SERVICE MANUAL
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED No.22023
2003/6
HOME THEATER DVD-AUDIO/VIDEO RECEIVER
2202320036RX-DV31SL
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
5 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
6 DESCRIPTION OF MAJOR ICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
Area suffix
J ----------------------------- U.S.A.
C -------------------------- Canada
DVD/SUPER VCD/VCD/CD
COMPAC T
SUPER VI D E O
RX-DV31 HOME THEATER DVD-AUDIO/ VIDEO RECEIVER

1-2 (No.22023)
SPECIFICATION
Amplifier Output Power At Stereo operation Front channels 100 W per channel, min. RMS, driven into
8 Ω, 40 Hz to 20 kHz with no more than
0.8% total harmonic distortion.
At Surround operation Front channels 100 W per channel, min. RMS, driven into
8 Ωat 1 kHz, with no more than 0.8% total
harmonic distortion.
Center channel 100W,min.RMS, driven into 8 Ωat 1kHz,
with no more than 0.8% total harmonic
distortion.
Surround channels 100 W per channel, min. RMS, driven into
8 Ωat 1 kHz, with no more than 0.8% total
harmonic distortion.
Audio Audio Input Sensitivity/
Impedance (1 kHz) TV, TAPE/CDR, DBS, VCR 240 mV/47 kΩ
Audio Input (DIGITAL IN)* Coaxial DIGITAL 1 (DBS) 0.5 V(p-p)/75 Ω
Optical DIGITAL 2 (TV) -21 dBm to -15 dBm (660 nm ±30 nm)
* Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround
(with sampling frequency-32 kHz, 44.1 kHz, 48 kHz).
Signal-to-Noise Ratio
('66 IHF/'78 IHF) TV, TAPE/CDR, DBS, VCR 87 dB/67 dB
Frequency Response (8 Ω) TV, TAPE/CDR, DBS, VCR 20 Hz to 20 kHz (±1 dB)
Tone Control Bass (100 Hz) ±10 dB ±2 dB
Treble (10 kHz) ±10 dB ±2 dB
Video Video Input
Sensitivity/
Impedance
(1 kHz)
Composite
video DBS IN, VCR IN 1 V(p-p)/75 Ω
S-video DBS IN, VCR IN (Y:luminance) 1 V(p-p)/75Ω
(C:chrominance) 0.286 V(p-p)/75 Ω
Video Output
Level/Impedance
(1 kHz)
Composite
video VCR OUT, MONITOR OUT 1 V(p-p)/75 Ω
S-video VCROUT,MONITOR
OUT (Y:luminance) 1 V(p-p)/75 Ω
(C:chrominance) 0.286 V(p-p)/75 Ω
Component
video DVD COMPONENT VIDEO OUT (Component-Y) 1.0 V(p-p)/75 Ω
(Component-PB/PR) 0.7 V(p-p)/75 Ω
Color System NTSC
Horizontal
Resolution 500 lines
Signal-to-
Noise Ratio
(S/N)
63 dB
Synchronize Negative
FM tuner
(IHF) Tuning Range 87.5 MHz to 108.0 MHz
AM tuner Tuning Range 530 kHz to 1 710 kHz
General Power
Requirements AC 120 V , 60 Hz
Power
Consumption 200 W/255 VA (in operation) 2 W (in standby mode)
Dimensions
(W ×H ×D) 435 mm ×100 mm ×403.5 mm (17 3/16 in. ×3 15/16 in. ×15 15/16 in.)
Mass 8.4 kg (18.5 lbs)

(No.22023)1-3
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be per-
formed by qualified personnel only.
(2) Alterations of the design or circuitry of the product should
not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety charac-
teristics as the recommended replacement parts shown in
the Parts List of Service Manual may create shock, fire, or
other hazards.
(4) The leads in the products are routed and dressed with ties,
clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.Do not
use a line isolation transformer during this check.
• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent must not exceed 0.5mA AC (r.m.s.).
• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W resistor
paralleled by a 0.15µF AC-type capacitor between an ex-
posed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5µ
mA AC (r.m.s.).
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that
these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant
safety standards.
(4) It is essential that safety critical components are replaced
by approved parts.
(5) If mains voltage selector is provided, check setting for local
voltage.
1.3 Caution
Burrs formed during molding may be left over on some parts
of the chassis.
Therefore, pay attention to such burrs in the case of pre-
forming repair of this system.
1.4 Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
Good earth ground
Place this
probe on
each expose
d
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE

1-4 (No.22023)
1.5 Importance administering poin on the safety
F132 F131
F101
Caution: For continued protection against risk of
fire, replace only with same type 5A/125V for
F101, 2A/125V for F131 and F132.
This symbol specifies type of fast operating fuse.
Precaution: Pour eviter risques de feux, remplacez
le fusible de surete de F101 comme le meme type
que 5A/125V, et 2A/125V pour F131 et F132.
Ce sont des fusibles suretes qui functionnes rapide.
^
Main board (Forward side)
Power board (Forward side)

(No.22023)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-6 (No.22023)
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the top cover
(See Fig.1)
(1) From the both sides of the main body, remove the four
screws Aattaching the top cover.
(2) From the back side of the main body, remove the three
screws Battaching the top cover.
(3) Remove the top cover in the direction of the arrow 2 while
extending the lower sections of the top cover in the direc-
tion of the arrow 1. Fig.1
3.1.2 Removing the front panel assembly
(See Figs.2 to 4)
• Prior to performing the following procedures, remove the top
cover.
(1) From the top side of the main body, disconnect the card wire
from the connector CN114 on the main board. (See Fig.2.)
(2) Remove the screw Cattaching the earth wire and sub
trans. Board. (See Fig.2.)
(3) From the bottom side of the main body, remove the five
screws Dattaching the front panel assembly. (See Fig.3.)
(4) From the both side of the main body, release the two joints
ausing a flat-bladed screwdriver and remove the front pan-
el assembly in the direction of the arrow. (See Fig.4.)
Fig.2
Fig.3
Fig.4
B
1
1
2
Ax2
Ax2
Top cover
C
CN114
Main board
Earth wire
Sub trans board
Front panel assembly
DFront panel assembly
Joint a
Front panel assembly

(No.22023)1-7
3.1.3 Removing the rear panel
(See Fig.5)
• Prior to performing the following procedures, remove the top
cover.
(1) From the back side of the main body, remove the strain re-
lief from the rear panel in the direction of the arrow.
(2) Remove the twenty three screws Eattaching the each
board to the rear panel.
(3) Remove the four screws Fattaching the rear panel.
Fig.5
3.1.4 Removing the DSP board
(See Figs.6 and 7)
• Prior to performing the following procedures, remove the top
cover.
(1) From the back side of the main body, remove the four
screws Gattaching the DSP board to the rear panel. (See
Fig.6.)
(2) From the top side of the main body, disconnect the DSP
board from the connector CN611 on the DSP connector
board. (See Fig.7.)
(3) From the left side of the main body, lift the DSP board in the
direction of the arrow and disconnect the card wire from the
connector CN602 on the DSP board. (See Fig.7.)
(4) Take out the DSP board.
3.1.5 Removing the video jack board
(See Figs.6 and 7)
• Prior to performing the following procedures, remove the top
cover and DSP board.
(1) From the back side of the main body, remove the four
screws Hattaching the video jack board. (See Fig.6.)
(2) Disconnect the card wire from the connector CN402 on the
video jack board and take out the video jack board. (See
Fig.7.)
Fig.6
Fig.7
F
Rear panel
EEF
F
E
Strain relief
F
H
Rear panel G
DSP board
DSP connector
board
Card wire
Card wire
Video jack
board
CN611
CN402
CN602

1-8 (No.22023)
3.1.6 Removing the tuner
(See Figs.8 and 9)
• Prior to performing the following procedures, remove the top
cover, DSP board and video jack board.
(1) From the back side of the main body, remove the two
screws Jattaching the tuner. (See Fig.8.)
(2) From the top side of the main body, disconnect the card
wire from the connector CN1 on the tuner. (See Fig.9.)
(3) Take out the tuner. Fig.8
Fig.9
3.1.7 Removing the DAC board
(See Fig.10)
• Prior to performing the following procedures, remove the top
cover.
(1) From the top side of the main body, disconnect the DAC
board from the connectors CN911 and CN912 on the main
board.
Fig.10
J
CN 1
Tuner
Card wire
CN911
CN912
DAC board
Main board

(No.22023)1-9
3.1.8 Removing the amp. board
(See Fig.11)
• Prior to performing the following procedures, remove the top
cover and rear panel.
(1) From the top side of the main body, disconnect the wire
from the connector CN201 on the amp. board.
(2) Remove the screw Kattaching the earth wire to the heat
sink barcket.
(3) Remove the four screws Lattaching the amp. board.
(4) Disconnect the connector CN202 on the amp. board.
(5) Lift the amp. board and disconnect the wire from the con-
nector CN231 on the main board.
(6) Disconnect the parallel wire from the connector CN241 on
the main board and take out the amp. board.
Fig.11
3.1.9 Removing the heat sink
(See Fig.12)
• Prior to performing the following procedures, remove the top
cover, rear panel and amp. board.
(1) Remove the screw Mattaching the H.sensor board.
(2) Remove the five screws Nattaching the IC bracket, heat
sink bracket and heat sink.
Fig.12
3.1.10 Removing the power ICs
(See Fig.13)
• Prior to performing the following procedures, remove the top
cover, rear panel, amp. board and heat sink.
(1) From the reverse side of the amp. board, remove the sol-
ders from the soldered points battaching the power ICs to
the amp. board.
Fig.13
L
CN201
Earth wire
K
CN202
Main board
Amp. board
CN231
CN241
Heat sink bracket
N
H. sensor board
M
Heat sink bracket
Heat sink
IC bracket
Amp. board
N
N
Amp. board
Power ICs solbered points b

1-10 (No.22023)
3.1.11 Removingthe amp.sub(a)boardandamp.sub(b)board
(See Fig.14)
• Prior to performing the following procedures, remove the top
cover, rear panel and amp. board.
(1) From the forward side of the amp. board, disconnect the
amp. sub(a) board from the connector CN203 on the amp
board.
(2) Disconnect the amp. sub(b) board from the connector
CN204 on the amp. board.
Fig.14
3.1.12 Removing the DVD mechanism assembly
(See Fig.15)
• Prior to performing the following procedures, remove the top
cover and front panel assembly.
(1) From the top side of the main body, remove the screw P
and two screws Qattaching the DVD mechanism assem-
bly.
Reference:
• When attaching the screw P, attach the thrust spring
together with it.
• When attaching the screw Q, attach the earth wires to-
gether with them.
(2) Disconnect the DVD mechanism assembly from the con-
nectors CN512 and CN513 on the main board.
(3) Take out the DVD mechanism assembly.
Fig.15
3.1.13 Removing the main board
(See Fig.16)
• Prior to performing the following procedures, remove the top
cover, rear panel, DAC board, DSP board, video jack board,
tuner, amp. board and DVD mechanism assembly.
(1) From the top side of the main body, disconnect the fan mo-
tor wire from the connector CN122 on the main board.
(2) Disconnect the card wire from the connector CN125 on the
main board.
(3) Disconnect the wire from the connector CN121 on the main
board.
(4) Disconnect the parallel wire from the connector CN291 on
the main board.
(5) Remove the five screws Rattaching the main board.
Reference:
Remove the barrier, DSP connector board and amp. connec-
tor board as required.
Fig.16
CN203
CN204
Amp. sub (b) board Amp. sub (a) board
Amp. board
Q
P
Q
CN513 Earth wires
CN512
Thrust spring
DVD mechanism
assembly
R
R
CN122
CN125 CN121 CN291
Amp.
connector
board
Main board
Barrier
Fan
motor
wire
Card
wire
Wire
Parallel wire
DSP connecter
board

(No.22023)1-11
3.1.14 Removing the sub trans. Board
(See Fig.17)
• Prior to performing the following procedures, remove the top
cover and front panel assembly.
(1) From the top side of the main body, remove the tie band
bundling the wires.
(2) Disconnect the card wire from the connector CN115 on the
sub trans. board.
(3) Disconnect the wire from the connector CN111 on the sub
trans. board.
(4) Disconnect the wire from the connector CN201 on the amp.
board.
(5) Remove the three screws Sattaching the sub trans. board.
(6) From the reverse side of the sub trans. board, remove the
solders from the soldered points cattaching the wires.
3.1.15 Removing the fan motor
(See Figs.17 and 18)
• Prior to performing the following procedures, remove the top
cover and front panel assembly.
(1) From the top side of the main body, remove the tie band
bundling the wires. (See Fig.17.)
(2) Disconnect the fan motor wire from the connector CN122
on the main board. (See Fig.17.)
(3) From the front side of the main body, remove the four
screws Tattaching the fan motor to the fan bracket. (See
Fig.18.)
(4) Take out the fan motor in the direction of the arrow. (See
Fig.18.)
Reference:
• When attaching the screws T, attach the wire holder and
wire clamp together with them. (See Fig.18.)
• After attaching the fan motor, bundle the wires using the wire
clamp. (See Fig.18.)
Fig.17
Fig.18
S
S
S
CN201
CN122
CN115
Amp. board Fan motor
Fan motor
wier
Chassis base
Main board
Tie band
Fan
bracket
Soldered
points c
Sub trans.
board
T
T
Fan motor
Wire clamp
Wire holder
Chassis base
Fan bracket

1-12 (No.22023)
3.1.16 Removing the power board
(See Fig.19)
• Prior to performing the following procedures, remove the top
cover.
(1) From the top side of the main body, disconnect the wire
from the connector CN101 on the power board.
Reference:
Remove the tie bands as required.
(2) Remove the solders from the soldered points dattaching
the power cord.
(3) Remove the two screws Uattaching the power board.
(4) From the reverse side of the power board, remove the sol-
ders from the soldered point eattaching the wires.
3.1.17 Removing the power trans. former
(See Figs.19 and 20)
• Prior to performing the following procedures, remove the top
cover.
(1) From the top side of the main body, remove the tie bands
and wire clamps bundling the wires. (See Fig.20.)
(2) Disconnect the wire from the connector CN121 on the main
board. (See Fig.20.)
(3) Disconnect the wires from the connector CN111 on the sub
trans. board. (See Fog.20.)
(4) Remove the two screws Uattaching the power board and
then turn over the power board. (See Fig.19.)
(5) Remove the solders from the soldered points eattaching
the wires. (See Fig.19.)
(6) Remove the four screws Vattaching the power trans.
former. (See Fig.19.)
(7) Take out the power trans. former.
3.1.18 Removing the headphone board
(See Fig.20)
• Prior to performing the following procedures, remove the top
cover and front panel assembly.
(1) From the top side of the main body, disconnect the parallel
wire from the connector CN291 on the main board.
(2) Remove the three screws Sattaching the sub trans. board.
Reference:
It is not necessary to remove the wire from the sub trans.
board.
(3) Remove the screw Wattaching the headphone board while
lifting the sub trans. board slightly.
Fig.19
Fig.20
VV
U
U
CN101
Power board Power cord
Soldered points d
Soldered points e
Tie bands
Power trans. former
S
S
SW
CN111
CN121 CN291
Main board
Tie bans
Tie bans Headphone
board
Wire clamps
Sub
trans
board

(No.22023)1-13
3.2 Front panel assembly section
3.2.1 Removing the FL board
(See Figs.21 and 22)
• Prior to performing the following procedures, remove the top
cover and front panel assembly.
(1) From the front side of the front panel assembly, pull out the
volume knob assembly in the direction of the arrow. (See
Fig.21.)
(2) From the back side of the front panel assembly, remove the
eight screws Xattaching the FL board. (See Fig.22.)
(3) Disconnect the wire from the connector CN703 on the FL
board while lifting the FL board slightly. (See Fig.22.)
(4) Remove the solders from the soldered points fand gat-
taching the parallel wires while lifting the FL board. (See
Fig.22.)
(5) Take out the FL board from the front panel assembly.
Reference:
Remove the parallel wires as required.
Fig.21
Fig.22
Front panel
assembly
Volume knob assembly
X
CN703
Front panel
FL board Wire
Soldered point f
Soldered point g

1-14 (No.22023)
3.2.2 Removing the control board
(See Fig.23)
• Prior to performing the following procedures, remove the top
cover, front panel assembly and FL board.
Reference:
It is not necessary to remove the parallel wires from the FL
board.
(1) Remove the three screws Yattaching the control board.
(2) Remove the solders from the soldered points hattaching
the parallel wire while lifting the control board.
Reference:
Remove the parallel wire as required.
3.2.3 Removing the indicator board
(See Fig.23)
• Prior to performing the following procedures, remove the top
cover and front panel assembly.
(1) From the back side of the front panel assembly, remove the
two screws Zattaching the lens holder.
(2) Remove the solders from the soldered points ion the FL
board attaching the parallel wire.
(3) Remove the solders from the soldered points jon the pow-
er switch board attaching the parallel wire.
Reference:
Remove the parallel wires as required.
Fig.23
3.2.4 Removing the power switch board
(See Fig.24)
• Prior to performing the following procedures, remove the top
cover and front panel assembly.
(1) From the back side of the front panel assembly, remove the
two screws AA attaching the power switch board.
(2) Remove the solders from the soldered points jon the pow-
er switch board attaching the parallel wire.
Reference:
Remove the parallel wire as required.
3.2.5 Removing the speaker SW. board
(See Fig.24)
• Prior to performing the following procedures, remove the top
cover and front panel assembly.
(1) From the back side of the front panel assembly, remove the
three screws AB attaching the speaker SW. board.
(2) Disconnect the wire from the connector CN703 on the FL
board.
Fig.24
Control board Indicator board
Soldered point hLens holder
YZ
FL board
Soldered point i
AB
AA
CN703
FL board
Speaker SW. board
Power switch
board
Soldered
point j

(No.22023)1-15
3.3 DVD mechanism section
• Remove the top cover.
• Remove the front panel assembly.
• Remove the DVD mechanism assembly.
3.3.1 Removing the tray
(See Figs.1 and 2)
(1) From the left side of the DVD mechanism assembly, push
the slide cam in the direction of the arrow 1 and then pull
out the tray in the direction of the arrow 2. (See Fig.1.)
(2) Push the tray stoppers ain the direction of the arrow 3, pull
out the tray in the direction of the arrow 4. (See Fig.2.)
3.3.2 Attaching the tray
(See Fig.2)
When attaching the tray, insert the tray to the rail of the DVD
mechanism assembly and then push the tray in the DVD mech-
anism assembly. Fig.1
Fig.2
3.3.3 Removing the tray
(See Fig.3)
(1) From the bottom side of the DVD mechanism assembly,
disconnect the card wires from the connectors CN201 and
CN202 on the DVD servo board.
Caution:
Be sure to solder the short land sections bon the flexible
wire before disconnecting the flexible wire from connec-
tor CN101 on the DVD servo board.
If the flexible wire is disconnected without attaching sol-
der, the DVD pickup unit may be destroyed by static
electricity.
(2) Release the locks of the connector CN101 on the DVD ser-
vo board in the direction of the arrow 1, disconnect the flex-
ible wire.
Caution:
In the assembly, be sure to remove solders from the
short land sections bafter connecting the flexible wire to
the connector CN101 on the DVD servo board.
(3) While pushing the claws cof the DVD mechanism assem-
bly in the direction of the arrow 2, remove the DVD servo
board in an upward direction.
Fig.3
2
Tray
Slide cam
1
DVD mechanism assembly
Tray
Tray stoppers a
3
4
DVD mechanism assembly
Claw c
Claw c
CN201
CN202
CN101
DVD servo board
11
222
Short land sections b
Card wire
Card wire
Flexible wire

1-16 (No.22023)
3.3.4 Removing the clamper base
(See Fig.4)
(1) From the top side of the DVD mechanism assembly, re-
move the four screws Aattaching the clamper base.
(2) Remove the clamper base from the bosses d of the loading
base in an upward direction, remove the clamper base
from the sections ewhile sliding it in the direction of the ar-
row.
Fig.4
3.3.5 Removing the tray drive board
(See Fig.5)
• Remove the clamper base.
(1) From the bottom side of the DVD mechanism assembly,
disconnect the card wire from the connector on the tray
drive board.
(2) Remove the solders from the soldered sections fon the
tray drive board.
(3) Remove the screw Battaching the tray drive board to the
DVD mechanism assembly.
Fig.5
Clamper base
AA
Boss d
Boss dA A
Section e
Section e
Loading base
Motor Tray drive board
DVD mechanism assembly
B
Soldered
sections f
Connector
Card wire

(No.22023)1-17
3.3.6 Removing the motor
(See Fig.6)
• Remove the clamper base.
• Remove the tray drive board.
(1) From the top side of the DVD mechanism assembly, re-
move the belt of the pulley gear.
Note:
Take care not to attach grease on the belt.
(2) Remove the screw Cattaching the motor to the DVD mech-
anism assembly.
Fig.6
3.3.7 Removing the DVD traverse mechanism assembly
(See Figs.7)
• Remove the DVD servo board.
• Remove the clamper base.
(1) From the top side of the DVD mechanism assembly, re-
move the four screws Dattaching the DVD traverse mech-
anism assembly to the loading base.
(2) Take out the DVD traverse mechanism assembly from the
loading base.
Fig.7
DVD mechanism assembly
Belt
C
Motor
Pulley gear
DVD traverse mechanism assembly
D D
DD
Loading base

1-18 (No.22023)
3.3.8 Removing the DVD pickup unit
(See Figs.8 to 10)
• Remove the DVD servo board.
• Remove the clamper base.
• Remove the DVD traverse mechanism assembly.
(1) From the top side of the DVD traverse mechanism assem-
bly, remove the screw Eattaching the plate and torsion
spring. (See Fig.8.)
(2) Remove the shaft from the section gand then remove the
shaft from the section h. (See Fig.9.)
(3) Disengage the section iof the DVD pickup unit and then re-
move the DVD pickup unit with the shaft. (See Fig.9.)
(4) Pull the shaft out of the DVD pickup unit. (See Fig.10.)
(5) Remove the two screws Fattaching the SW. actuator. (See
Fig.10.)
3.3.9 Attaching the DVD pickup unit
(See Figs.8, 10 to 12)
Reference:
Refer to the explanation of "Removing the DVD pickup unit" on
the preceding page.
(1) Attach the SW. actuator and shaft to the DVD pickup unit.
(See Fig.10.)
(2) Engage the section iof the DVD pickup unit to the shaft of
the DVD traverse mechanism assembly first, and set the
both ends of the shaft of the DVD pickup unit in the sections
gand h of the DVD traverse mechanism assembly. (See
Fig.11.)
(3) Slide the DVD pickup unit all the way in the direction of the
arrow. (See Fig.12.)
(4) Mesh the lead screw to the section jof DVD pickup unit and
then set the end of the lead screw to the section k. (See
Fig.12.)
(5) Attach the torsion spring. (See Fig.8.)
(6) Attach the plate. (See Fig.8.)
Fig.8
Fig.9
Fig.10
Fig.11
Fig.12
E
Plate
Torsion spring DVD pickup unit
DVD traverse mechanism assembly
DVD pickup unit
Shaft
Section h
Section g
Section i
Shaft
DVD pickup unit
F
SW. actuator
Section i
DVD traverse mechanism assembly
Shaft
Section g
Section h
DVD pickup unit
Section k
Section j
Lead screw
DVD pickup unit

(No.22023)1-19
3.3.10 Removing the spindle motor board
(See Figs.13 and 14)
• Remove the DVD servo board.
• Remove the clamper base.
• Remove the DVD traverse mechanism assembly.
(1) From the top side of the DVD traverse mechanism assem-
bly, remove the feed motor wire that is soldered to the spin-
dle motor board. (See Fig.13.)
(2) From the bottom side of the DVD traverse mechanism as-
sembly, remove the three screws Gattaching the spindle
motor board. (See Fig.14.)
Fig.13
Fig.14
Remove the solders.
DVD traverse mechanism assembly
Spindle motor board
Feed moto
r
wire
G
G
DVD traverse mechanism assembly

1-20 (No.22023)
3.3.11 Removing the feed motor
(See Figs.15 to 17)
• Remove the DVD servo board.
• Remove the clamper base.
• Remove the DVD traverse mechanism assembly.
(1) From the top side of the DVD traverse mechanism assem-
bly, remove the feed motor wire that is soldered to the spin-
dle motor board. (See Fig.15.)
(2) Remove the two screws Hattaching the feed holder as-
sembly and then take out the feed holder assembly. (See
Fig.15.)
(3) Remove the screw Jattaching the thrust spring. (See
Fig.16.)
(4) Remove the feed gear and lead screw in the direction of the
arrow. (See Fig.16.)
(5) Remove the two screws Kattaching the feed motor. (See
Fig.17.)
Fig.15
Fig.16
Fig.17
H
Feed motor
H
Remove the solders.
DVD traverse mechanism assembly
Feed motor
wire
Spindle motor board
Feed holde
r
assembly
Feed holder assembly
J
Feed motor
Feed gear
Lead screw
Thrust spring
Feed holder assembly
K