Jvc TH-S33 Service Manual

SERVICE MANUAL

DVD DIGITAL CINEMA SYSTEM

MB44520057

TH-S33

(SP-THS33C)

(SP-THS33S)

(XV-THS33)

(SP-THS33F)

Area suffix

A ------------------------ Australia

(SP-WS33)

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

COPYRIGHT © 2005 Victor Company of Japan, Limited

No.MB445

2005/7

SPECIFICATION

Center unit (XV-THS33)

Audio section Front/Center/Surround 33 W per channel, RMS at 6 Ω at 1 kHz,with 10 % total harmonic

distortion.

Subwoofer 40 W, RMS at 4 Ω at 100 Hz, with 10% total harmonic distortion.

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 Ω

S-video-Y 1.0 V(p-p)/75 Ω
S-video-C For PAL 0.3 V(p-p)/75 Ω

For NTSC 0.286 V(p-p)/75 Ω

Component
(Interlace/Progressive)

Tuner section Tuning Range FM 87.50 MHz to 108.00 MHz

AM At 10 kHz intervals

Speaker impedance Front/Center/Surround 6 Ω to 16 Ω

Subwoofer 4 Ω to 16 Ω

General Power Requirements AC 110 V/AC 127 V/AC 220 V/AC 230 - 240 V , 50/60 Hz

Power Consumption 100 W (at operation)

Dimensions (W × H × D) 360 mm × 65 mm × 370 mm

Mass 5.3 kg

Y: 1.0 V(p-p)/75 Ω
PB/PR: 0.7 V(p-p)/75 Ω

530 kHz to 1 710 kHz (*1:600 kHz)
At 9 kHz intervals
531 kHz to 1 710 kHz (*1:602 kHz)

AC 240 V , 50 Hz

4.8 W (in standby mode)

*1: For the countries of the Middle East

Front speakers (SP-THS33F)

Type 1-Way Bass-Reflex Type (Magnetically-shielded Type)

Speaker 5.5 cm cone × 1

Power Handling Capacity 35 W

Impedance 6 Ω

Frequency Range 90 Hz to 20 000 Hz

Sound Pressure Level 75 dB/W·m

Dimensions (W × H × D) 230 mm × 1 102 mm × 260 mm

Mass 3.2 kg each

Center speaker (SP-THS33C)

Type 1-Way Bass-Reflex Type (Magnetically-shielded Type)

Speaker 5.5 cm cone × 2

Power Handling Capacity 35 W

Impedance 6 Ω

Frequency Range 95 Hz to 20 000 Hz

Sound Pressure Level 81 dB/W·m

Dimensions (W × H × D) 220 mm × 84 mm × 88.5 mm

Mass 0.97 kg

Surround speakers (SP-THS33S)

Type 1-Way Bass-Reflex Type

1-2 (No.MB445)

Speaker 5.5 cm cone × 1

Power Handling Capacity 35 W

Impedance 6 Ω

Frequency Range 105 Hz to 20 000 Hz

Sound Pressure Level 75 dB/W·m

Dimensions (W × H × D) 83 mm × 131 mm × 93.5 mm

Mass 0.50 kg each

Subwoofer (SP-WS33)

Type 1-Way Bass-Reflex Type

Speaker 16.0 cm cone × 1

Power Handling Capacity 40 W

Impedance 4 Ω

Frequency Range 30 Hz to 150 Hz

Sound Pressure Level 75 dB/W·m

Dimensions (W × H × D) 129 mm × 284 mm × 337 mm

Mass 3.3 kg

Design and specifications are subject to change without notice.

(No.MB445)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 wil l 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, h igh temperature parts, movi ng parts and/or
sharp edges for the prevention of el ectric 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 he ads,
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 exp osed metal p art 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, 1,000
in the following manner. Connect a 1,500
paralleled by a 0.1 5
exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC

Ω per volt or more sensitivity

Ω 10W resistor

µF AC-type capacitor between an

voltmeter.
Move the resistor connection to ea ch 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 leg al 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.MB445)

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.

Short land section

pickup

Card wire

Traverse mechanism assembly

(No.MB445)1-5

1.8 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 CD,MD and DVD player uses 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

WARNING LABEL

CAUTION : Visible and Invisible

laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)

CLASS 1
LASER PRODUCT

ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)

CAUTION : Visible and Invisible
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)

VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)

VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)

VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)

ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)

VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)

1-6 (No.MB445)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MB445)1-7

SECTION 3

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the metal cover
(See Figs.1 to 4)

(1) From the both sides of th e 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 five

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 cov-

er, 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 claws a using the longer screwdriver. (See

Fig.4.)

Metal cover

A

Fig.1

Metal cover

A

Fig.2

Metal cover

B

B B

Fig.3

Metal cover

1-8 (No.MB445)

a

Fig.4

a

3.1.2 Removing the front panel assembly

(See Figs.5 to 7)

• Remove the metal cover.

(1) From the right side of the DVD mechanism assembly, push

the slide cam and pull the tray assembly out of the main
body in the direction of the arrow. (See Fig.5.)

(2) From the front side of the main body, remove the CD fitting

assembly from the tray assembly in the direction of the ar­row and push in the tray assembly as before. (See Fig.6.)

(3) From the top side of the main body, disconnect the card

wire from the connector CN400
Fig.5.)

(4) Disconnect the card wire from the connector CN510

HP terminal board. (See Fig.5.)

(5) From the bottom side of the main body, remove the three

screws C attaching the front panel assembly. (See Fig.7.)

(6) From both sides and back side of the main body, remove

the front panel assembly in the direction of the arrow while

releasing the joints b. (See Fig.7.)

on the main board. (See

on the

DVD mechanism assembly

Main board

HP terminal board

CN400

CN510

Front panel assembly

Tray assembly

Front panel assembly

b b

DVD mechanism
assembly

Slide cam

Fig.5

CD fitting assembly

Fig.6

C

Front panel assembly

Fig.7

(No.MB445)1-9

3.1.3 Removing the DVD mechanism assembly
(See Figs.5,6 and 8)

• Remove the metal cover.

(1) From the right side of the DVD mechanism assembly, push

the slide cam and pull the tray assembly out of the main
body in the direction of the arrow. (See Fig.5.)

(2) From the front side of the main body, remove the CD fitting

from the tray a ssembly in the direction of the arrow and
push in the tray assembly as before. (See Fig.6.)

(3) From the top sid e of the main body, disconnect the card

wires from the co nnectors CN403
board. (See Fig.8.)

(4) Remove the three screws D attaching the DVD mechanism

assembly to the chassis base. (See Fig.8.)

3.1.4 Removing the HP terminal board
(See Fig.8)

• Remove the metal cover.

Reference:

Remove the front panel assembly as required. (See 3.1.2 "Re­moving the front panel assembly".)

(1) From the top side of the main body, remove the screw E at-

taching the HP terminal board to the chassis base.

(2) Disconnect the card wires from the connectors CN510

the HP terminal board. (See Fig.8.)

(3) Take out the HP terminal board from the main body.

Reference:

When attaching the HP terminal board, align the hole on the
HP terminal board to the projection c of the chassis base be-

fore attaching the screw E.

to CN405 on the main

on

DVD mechanism assembly

CN404

Card wires

D

HP terminal board

CN403

Fig.8

Chassis base

CN405

CN510

c

E

3.1.5 Removing the rear panel
(See Fig.9)

• Remove the metal cover.

(1) From the back side of the main body, remove the strain re-

lief attaching the power cord in the direction of the arrow.

(2) Remove the eight screws F attaching the rear panel to the

main body.

(3) Release the joints d, and remove the rear panel from the

main body.

Power cord

d d

Strain relief

Rear panel

Fig.9

F

F

1-10 (No.MB445)

3.1.6 Removing the tuner assembly

(See Figs.10 and 11)

• Remove the metal cover.

(1) From the top side of the main body, disconnect the card

wire from the connector CN1
Fig.10.)

(2) From the back side of th e main body, remove the two

screws G attaching the tuner assembly to the rear panel.

(See Fig.11.)

(3) Take out the tuner assembly from the main body.

3.1.7 Removing the video board

(See Figs.10 and 11)

• Remove the metal cover.

(1) From the top side of the main body, disconnect the card

wire from the connector CN350
Fig.10.)

(2) From the back side of th e main body, remove the two

screws H attaching the video board to the rear panel. (See

Fig.11.)

(3) Take out the video board from the main body.

on the tuner assembly. (See

on the video board. (See

Card wires

CN1

CN350

Videol board Tuner assembly

Fig.10

Fig.11

H

G

G

(No.MB445)1-11

3.1.8 Removing the power amp.boards
(See Figs.12 and 13)

• Remove the metal cover and video board.

(1) From the top side of the main board, remove the three

screws J attaching the heat sink. (See Fig.12.)

(2) Disconnect the wire from the connector CN100

board. (See Fig.12.)

(3) Disconnect the each power amp.boards connecters from

the connectors CN271
(See Fig.12.)

Reference:

When attaching the heat sink w ith power amp.boards,
confirm the con nectors CN281

ready lock before attaching the screws J.

(4) Take out the heat sink with power amp.boards from the

main board. (See Fig.12.)

(5) Remove the two screws K, two screws M and two screws

N attaching the heat sink. (See Fig.13.)

(6) Remove the each power amp.boards from the heat sink.

, CN276, CN281 on the main board.

, CN276 and CN271 al-

on the main

Power amp. board

CN100

Main board

J

CN281

CN276

Power amp. board

Power amp. board

(CEN & SW)

CN271

Fig.12

(SL & SR)

K

K

Fig.13

Heat sink

Heat sink

Power amp. board

(FL & FR)

M

M

N

N

Heat sink

1-12 (No.MB445)

3.1.9 Removing the main board

(See Figs.14 and 15)

• Remove the metal cover, video board and heat sink with power

amp. boards.
(1) From the top side of the main body, disconnect the card

wires from the connectors CN400

, on the main board. (See Fig.14.)

CN405

(2) Disconnect the wires from the connectors CN102, CN101

on the main board. (See Fig.14.)

Reference:

After connecting the wires, fix the wi res with the wire
clamp.

(3) Remove the two screws P attaching the main board to the

chassis base. (See Fig.14.)

(4) From the ba ck side of th e main body, remove the three

screws Q attaching the main board to the rear panel. (See

Fig.15.)From the back side of the main body, remove the

three screws Q attaching the main board to the rear panel.

(See Fig.15.)

(5) Take out the main board from the main body.

, CN401 and CN403 to

Wire clamp

P

CN102 CN400

CN110 CN401

CN405

CN403

CN404

P

Fig.14

Rear panel

Fig.15

Q

(No.MB445)1-13

3.1.10 Removing the transformer board
(See Fig.16)

• Remove the metal cover.

(1) From the top side of the main body, disconnect the wires

from the connectors CN950, CN952 on the tra nsformer
board.

(2) Disconnect the wires from th e connectors CN101

main board.

(3) Remove the three screws R attaching the transformer

board.

(4) Take out the transformer board from the main body.

on the

R

CN101

3.1.11 Removing the power transformer
(See Fig.17)

• Remove the metal cover.

(1) From the top side of the main body, remove the tie bands

and wire clamp bundling the wires.

(2) Disconnect the wire from the connector CN952

transformer board.

(3) Disconnect the wire from the connector CN102 on the main

board.

Reference:

After connecting the wires to the connectors, bundle the
wires with the wire clamps and new tie bands as before.

(4) Remove the four screws S and take out the power trans-

former from the main body.

on the

CN952

CN950

Power transformer

S

Tie
bands

R

Fig.16

S

Transformer board

Power cord

Wire clamp

S

1-14 (No.MB445)

CN952

Transformer board

Fig.17

CN102

Main board

3.1.12 Removing the front board

(See Figs.18 and 19)

• Remove the metal cover and front panel assembly.

(1) From the front side of the front panel assembly, pull out the

volume knob in the direction of the arrow. (See Fig.18.)

(2) From the inside of the front panel assembly, remove the six

screws T attaching the front board. (See Fig.19.)

(3) Take out the front board from the front panel assembly.

Volume knob

Front panel assembly

Fig.18

Front board

T

Front panel assembly

Fig.19

(No.MB445)1-15

3.2 DVD mechanism section

• Remove the DVD mechanism assembly from the main body.

3.2.1 Removing the traverse mechanism assembly
(See Fig.1)

From the bottom side of the DVD mechanism assembly, remove

the four screws A attaching the traverse mech anism assembly

and take ou t the traverse mechanism assembly with the DVD
module board.

DVD mechanism assembly

Traverse mechanism assembly

AA

DVD module board

Fig.1

1-16 (No.MB445)

3.2.2 Removing the DVD module board

(See Figs.2 and 3)

• Remove the traverse mechanism assembly.

(1) From the side of the traverse mechanism assembly, solder

the short land sections a on the DVD pickup. (See Fig.2.)

(2) From the bottom side of the traverse mechanism assem-

bly, release the lock of the connector CN101
module board in the direction of the arrow and disconnect
the card wire. (See Fig.3.)

Caution:

• Solder the short land sections a on the DVD pickup be-

fore disconnecting the card wire from the connector

on the D VD module board. If the card wire is

CN101

disconnected without attaching solder, the DVD pick­up may be destroyed by static electricity. (See Figs.2
and 3.)

• When attaching the DVD module board, be sure to re-

move solders from the short land sections a after con-

necting the card wire to the connector CN101
DVD module board. (See Figs.2 and 3.)

(3) Disconnect the card wire from the connector CN201

DVD module board. (See Fig.3.)

(4) Remove the two screws B attaching the DVD modu le

board. (See Fig.3.)

(5) Remove the DVD module board from the engagement sec-

tion b in an upward and remove the engagement section c

in the direction of the arrow. (See Fig.3.)

on the DVD

on the

on the

a

Traverse mechanism assembly

Card wire

B

DVD pickup

Fig.2

Card wire

CN101 CN201

b

c

DVD module board

B

Traverse mechanism assembly

Fig.3

(No.MB445)1-17

3.2.3 Removing the DVD pickup
(See Figs.2,4 to 6)

• Remove the traverse mechanism assembly.

(1) From the side of the traverse mechanism assembly, solder

the short land sections a on the DVD pickup. (See Fig.2.)

(2) Release the lock of the connector on the DVD pickup in the

direction of the arrow and disconnect the card wire. (See
Fig.4.)

Caution:

• Solder the short land sections a on the DVD pickup be-

fore disconnecting the card wire from the connector on
the DVD pickup. If the card wire is disconnected with­out attaching solder, the DVD pickup may be de­stroyed by static electricity. (See Figs.2 and 4.)

• When attaching the DVD pickup , be sure to remove

solders from the short land sections a after connecting

the card wire to the con nector on the DVD pi ckup.
(See Figs.2 and 4.)

(3) Remove the screw C and remove the feed bracket from the

sections d. (See Fig.4.)

(4) Release the claw e of the thrust spring in the direction of

the arrow and remove the thrust spring. (See Fig.4.)

(5) Remove the guide shaft of the DVD pickup from the section

f on the traverse mech anism assembly and remove the
guide shaft from the section g while moving it in the direc-

tion of the arrow. (See Fig.5.)

(6) Remove the DVD pickup from the section h of the traverse

mechanism assembly and take ou t the DVD pickup with
the guide shaft. (See fig.5.)

(7) From the bottom side of the DVD pickup, remove the two

screws D attaching the rack arm and rack arm spring. (See

Fig.6.)

(8) Pull the guide shaft out of the DVD pickup. (See Fig.6.)

Feed bracket

C

Card wire

Traverse mechanism assembly

f

Guide shaft

e

Thrust spring

Connector

Fig.4

Thrust spring

DVD pickup

Torsion spring

g

1-18 (No.MB445)

DVD pickup

Guide shaft

h

Fig.5

DVD pickup

Rack arm

Rack arm spring

D

Fig.6

3.2.4 Attaching the DVD pickup

(See Figs.2,4 to 7)

• See "3.2.3 Removing the DVD pickup".

(1) Attach the guide shaft, rack arm and rack arm spring to the

DVD pickup. (See Fig.6.)

(2) Align the DVD pickup to the section h of the traverse mech-

anism assembly first, and set the both ends of the guide

shaft of the DVD pickup in th e sections f and g of the

traverse mechanism assembly. (See Fig.5.)

Reference:

When attaching the guide shaft to the section g, attach it

under the rod spring. (See Fig.5.)

(3) Attach the feed bracket and thrust spring. (See Fig.4.)

(4) Remove solders from the short land sections a after con-

necting the card wire to the connector on the DVD pickup.
(See Figs.2 and 4.)

(5) Turn the screw shaft gear in the direction of the arrow 1 to

move the DVD pickup fully in the direction of the arrow 2 .
(See Fig.7.)

Screw shaft gear

1

22

DVD pickup

Fig.7

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