JVC TH-S33 Manuale utente
SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.MB445
2005/7
DVD DIGITAL CINEMA SYSTEM
MB44520057TH-S33
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
Area suffix
A ------------------------ Australia
(XV-THS33)
(SP-THS33C)
(SP-THS33S)
(SP-THS33F)
(SP-WS33)
1-2 (No.MB445)
SPECIFICATION
Center unit (XV-THS33)
*1: For the countries of the Middle East
Front speakers (SP-THS33F)
Center speaker (SP-THS33C)
Surround speakers (SP-THS33S)
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)
Y: 1.0 V(p-p)/75 Ω
PB/PR: 0.7 V(p-p)/75 Ω
Tuner section Tuning Range FM 87.50 MHz to 108.00 MHz
AM At 10 kHz intervals
530 kHz to 1 710 kHz (*1:600 kHz)
At 9 kHz intervals
531 kHz to 1 710 kHz (*1:602 kHz)
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
AC 240 V , 50 Hz
Power Consumption 100 W (at operation)
4.8 W (in standby mode)
Dimensions (W × H × D) 360 mm × 65 mm × 370 mm
Mass 5.3 kg
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
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
Type 1-Way Bass-Reflex Type
(No.MB445)1-3
Subwoofer (SP-WS33)
Design and specifications are subject to change without notice.
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
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
1-4 (No.MB445)
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. An y 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 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, 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 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 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, particular-
ly any exp osed metal p art 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, 1,000Ω per volt or more sensitivity
in the following manner. Connect a 1,500Ω 10W resistor
paralleled by a 0.1 5µF AC-type capacitor between an
exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to 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 outle t 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.).
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 repa irer 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 exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE
(No.MB445)1-5
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.
(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.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
Short land section
Card wire
Traverse mechanism assembly
pickup
1-6 (No.MB445)
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.
REPRODUCTION AND POSITION OF LABELS
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)
VARO: Avattaessa jasuojalukitus
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)
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
CLASS 1
LASER PRODUCT
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)
VARO: Avattaessa jasuojalukitus
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)
WARNING LABEL
(No.MB445)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-8 (No.MB445)
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.)
Fig.1
Fig.2
Fig.3
Fig.4
A
Metal cover
A
Metal cover
B B
B
Metal cover
a
Metal cover
a
(No.MB445)1-9
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 tra y 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 ar-
row 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 th e connector CN400 on the main board. (See
Fig.5.)
(4) Disconnect the card wire from the connector CN510 on the
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.)
Fig.5
Fig.6
Fig.7
Slide cam
DVD mechanism
assembly
Tray assembly
Front panel assembly
CN510
HP terminal board
CN400
Main board
DVD mechanism assembly
Front panel assembly
CD fitting assembly
b b
C
Front panel assembly
1-10 (No.MB445)
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 side of the main body, disconnect the ca rd
wires from the co nnectors CN403 to CN405 on the main
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 "Re-
moving 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 on
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.
Fig.8
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.
Fig.9
HP terminal board
Chassis base
CN405
CN510
CN403
CN404
Card wires
DVD mechanism assembly
E
D
c
Rear panel
F
F
Strain relief
Power cord
d d
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