Thomson 42wm03st1 schematic
SERVICE MANUAL
DOCUMENTATION TECHNIQUE
TECHNISCHE DOKUMENTATION
DOCUMENTAZIONE TECNICA
DOCUMENTACION TECNICA
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WARNING : Before servicing this chassis please read the safety recommendations.
ATTENTION : Avant toute intervention sur ce châssis, lire les recommandations de sécurité.
ACHTUNG : Vor jedem Eingriff auf diesem Chassis, die Sicherheitsvorschriften lesen.
ATTENZIONE : Prima di intervenire sullo chassis, leggere le norme di sicurezza.
IMPORTANTE : Antes de cualquier intervención, leer las recomendaciones de seguridad.
- 1004
42WM03ST
42WM04ST
TV
Plasma
Indicates critical safety components, and identical components should be used for replacement. Only then can the
operational safety be garanteed.
Le remplacement des éléments de sécurité (repérés avec le symbole ) par des composants non homologués selon la
Norme CEI 65 entraine la non-conformité de l'appareil. Dans ce cas, la responsabilité du fabricant n'est plus engagée.
Wenn Sicherheitsteile (mit dem Symbol gekennzeichnet) nicht durch Original - Ersatzteile ersetzt werden, erlischt die
Haftung des Herstellers.
La sostituzione dei componenti di sicurezza (evidenziati con il segno ) con componenti non omologati secondo la
norma CEI 65 comporta la non conformitá dell'apparecchio. In tal caso è "esclusa la responsabilità " del costruttore.
La sustitución de elementos de seguridad (marcados con el simbolo ) por componentes no homologados segun la
norma CEI 65, provoca la no conformidad del aparato. En ese caso, el fabricante cesa de ser responsable.
MEASUREMENT CONDITIONS - CONDITIONS DE MESURES - MESSBEDINGUNGEN
CONDIZIONI DI MISURA - CONDICIONES DE MEDIDAS
RICEVITORE :
In UHF, livello d'entrata 1 mV, monoscopio barre :
- PAL, norma G. bianco 100%.
Via SCART, livello d'entrata 1 Vpp, monoscopio barre :
Colore, Contrasto, Luminositá media, Suono minimo.
Programma selezionato PR 01.
Tensioni continue rilevate rispetto alla massa con un voltmetro digitale.
RECEIVER :
On UHF,input level : 1 mV, bar test pattern :
- PAL, I standard, 100% white.
Via the scart socket, input level : 1 Vpp, bar test pattern :
Colour, contrast and brightness at mid-position, sound at minimum.
Programme selected : PR 01.
DC voltages measured between the point and earth using a digital
voltmeter.
EMPFÄNGER :
Bei UHF Eingangspegel 1 mV, Farbbalken :
- PAL, Norm G, Weiss 100%.
Über die Scartbuchse : Eingangspegel 1 Vss, Farbbalken :
Farbe, Kontrast, Helligkeit in der Mitte des Bereichs, Ton auf Minimum.
Zugeordnetes Programm PR 01.
Gleichspannungen mit einem digitalen Voltmeter zur Masse gemessen.
RECEPTEUR :
En UHF, niveau d'entrée 1 mV mire de barres
- SECAM, Norm L, Blanc 100%.
Par la prise Péritélévision, niveau d'entrée 1 Vcc, mire de barres .
Couleur, contraste, lumière à mi-course, son minimum.
Programme affecté PR 01.
Tensions continues relevées par rapport à la masse avec un
voltmètre numérique.
RECEPTOR :
En UHF, nivel de entrada 1 mV, mira de barras :
- PAL, norma G, blanco 100%.
Por la toma Peritelevision, nivel de entrada 1 Vpp mira de barra.
Color, Contraste, luz a mitad de carrera, Sonido minimo.
Programa afectado PR 01.
Tensiones continuas marcadas en relacion a la masa con un voltimetro digital.
Do not disconnect modules when they are energized!
Repairs on power supply section are to be carried out only with isolating transformer.
Ne pas retirer les modules lorsqu' ils sont sous tension. N'effectuer les travaux de maintenance sur la partie reliée
au secteur (Switch Mode) qu'au travers d'un transformateur d'isolement.
Module nicht bei eingeschaltetem Gerät entfernen!
Servicearbeiten am Netzteil nur unter Verwendung eines Regeltrenntrafos durchführen.
Non scollegare le piastre quando sono alimentate!
Per le riparazioni sulla sezione alimentatore, utilizzare un trasformatore isolatore.
No desconectar los módulos cuando están activados. Las reparaciones en la sección de alimentación de energía
deben ser ejecutadas solamente con un transformador de separación.
First issue 10 / 04 3
Page
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
DISASSEMBLY
Removing the leg tube assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Removing the rear cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Removing the filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
TROUBLESHOOTING
No power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
No picture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Vertical line fail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Horizontal line fail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
No command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
ADJUSTMENTS
Power (PLG-421) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power (DGK-420W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Color temperature in DVI mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Color temperature in RGB mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
APPENDIX A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
SCHEMATIC DIAGRAMS
Tuner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 - 32
Main . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 - 51
SPECIAL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 - 53
EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
CONTENTS
4 First issue 10 /04
IMPORTANT SAFETY PRECAUTIONS
1. Before returning an instrument to the customer, always make a safety check of the entire instrument, including the
following items, but not limited to them.
a. Be sure that no built-in protective devices are defective and/or have been defeated during servicing. (1) Protective
shields are provided on this chassis to protect both the technician and the customer. Correctly replace all missing
protective shields, including any removed for servicing convenience. (2) When reinstalling the chassis and/or other
assembly in the cabinet, be sure to put back in place all protective devices, including, but not limited to, non-metallic
control knobs, insulating fishpapers, adjustment and compartment covers/shields, and isolation resistor/capacitor
networks. Do not operate this instrument or permit it to be operated without all protective devices correctly
installed and functioning.
b. Be sure that there are no cabinet openings through which an adult or child might be able to insert their fingers and
contact a hazardous voltage. Such opening include, but are not limited to (1) spacing between the picture tube and
the cabinet mask, (2) excessively wide cabinet ventilation slots, and (3) an improperly fitted and/or incorrectly
secured cabinet back cover.
c. Leakage Current Hot Check: With the instrument completely reassembled, plug the AC line cord directly into a 230V
AC outlet. (Do not use an isolation transformer during this test.) Use a leakage current tester or a metering system.
With the instrument AC, first switch ON and then OFF. Measure from a known earth ground (metal waterpipe,
conduit, etc.) to all exposed metal parts of the instrument (antennas, handle bracket, metal cabinet, screwheads,
metallic overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical return path to the
chassis. Any current measured must not exceed 3.5 mA. Reverse the instrument power cord plug in the outlet and
repeat test. ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL
SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE INSTRUMENT TO THE
CUSTOMER.
2. Read and comply with all caution and safety-related notes on or inside the Monitor cabinet, on the Projection Monitor
chassis or on the picture tube.
+-
Test all exposed
metal surfaces
3. Wire cord
Also test with
plug reversed
(using AC adapter
plug as required)
Device
under
test
Earth ground
Leakage
current
tester
AC Leakage test
(Reading
should not
be above
3.5 mA)
First issue 10 / 04 5
3. Design Alteration Warning: Do not alter or add to the mechanical or electrical design of this unit. Design alterations and
additions, including, but not limited to, circuit modifications and the addition of the items such as auxiliary audio and/or
video output connections might alter the safety characteristics of this Projection Monitor and create a hazard to the user.
Any design alterations or additions will void the manufacturer's warranty and will make you, the service, responsible for
personal injury or property damage resulting therefrom.
4. Hot Chassis Warning:
a. Some Monitor chassis are electrically connected directly to one conductor of the AC power cord and may be safely
serviced without an isolation transformer only if the AC power plug is inserted so that the chassis is connected to the
ground side of the AC power source. To confirm that the AC power plug is inserted correctly, with an AC voltmeter
measure between the chassis and a known earth ground. If a voltage reading in excess of 1.0V is obtained, remove
and reinsert the AC power plug in opposite polarity and again measure the voltage potential between the chassis
and a known earth ground.
b. Some Monitor chassis normally have 85V AC (RMS.), between chassis and earth ground regardless of the AC plug
polarity. These chassis can be safely serviced only with an isolation transformer inserted in the power line between
the receiver and the AC power source, for both personnel and test equipment protection.
c. Some Projection Monitor chassis have a secondary ground system in addition to the main chassis ground. This
secondary ground system is not isolated from the AC power line. Insulating material that must not be defeated or
altered electrically separates the two ground systems.
5. Observe original lead dress. Take extra care to assure correct lead dress in the following areas:
a. near sharp edges,
b. near thermally hot parts (be sure that leads and components do not touch thermally hot parts),
c. the AC supply,
d. high voltage,
e. antenna wiring. Always inspect in all areas for pinched, out-of-place, or frayed wiring. Do not change spacing
between components and between components and the printed-circuit board. Check AC powers cord for damage.
6. Components, parts, and/or wiring that appear to have overheated or are otherwise damaged should be replaced with
components, parts, or wiring that meet original specifications. Additionally, determine the cause of overheating and/or
damage and, if necessary, take corrective action to remove any potential safety hazard.
7. PRODUCT SAFETY NOTICE: Many Monitor electrical and mechanical parts have special safety-related characteristics
some of which are often not evident from visual inspection, nor can the protection they give necessarily be obtained by
replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are
identified in this service data by shading with a mark on schematics. Use of a substitute replacement part that does not
have the same safety characteristics as the recommended replacement part in this service data parts list might create
shock, fire, and/or other hazards.
1. Removing the Leg Tube Assembly
Unscrew 4 screws from "Leg Tube Assembly." (Specification of screw driver is 15± 2kg), see fig.1
Push the "Leg Tube Assembly." downward to unlock and pull it away from unit, then unscrew 4 screws from rear cover.
(Specification of screw -driver is 15± 2 kg),
6 First issue 10 /04
Fig. 1
Fig. 2
HOW TO EXCHANGE THE MASK & PANEL PROCEDURE
First issue 10 / 04 7
2. Removing the rear cover
Unscrew 12 screws from rear cover, see red arrow (Specification of screw driver is 15± 2 kg)
Unscrew 8 screws from rear cover, and unscrew 2 screws from AC power socket, see red arrow (Specification of screw driver
is 9± 1 kg)
Unscrew 4 screws from rear cover, see red circle (Specification of screw driver is 15± 2 kg)
3. Removing the screws from panel:
Unscrew 20 pieces of screw from panel site (Specification of screw driver is 15± 2 kg)
10 screws
12 screws
4 screws
Fig. 3
20 screws
Fig. 4
8 First issue 10 /04
4. Removing the Mask and the J5 cable from PCB
5. Removing the filter
Unscrew 10 screws from mask (Specification of screw driver is 15± 2 kg), then remove four angles that hold the PDP filter. (Be
careful: Please do not bump or scrape when handling the PDP filter.)
Before putting panel back clean PDP filter make sure it's free from dust.
Unscrew 3 screws and remove control board
3 screws
Fig. 6
Fig. 7
J5
Fig. 5
First issue 10 / 04 9
Remove the Control buttons from old Mask and reinstall them on the new Mask.
Please to aim at red arrow to guide and there is have a channel when you put down glass back to new mask
Assemble 4 irons back to mask. Be careful: When you lock up 4 irons that screws should be to lock up on "SL&G" point.
6. Proceed in reverse order to re-assemble
Control buttons
Fig. 8
Fig. 9
Top side
Top bottom
Fig. 10
10 First issue 10 /04
TROUBLESHOOTING
No power
Switch the
power on
Check "Power Switch" module
Not correct
Correct
Replace
"Power Switch"
module
Replace
"Main Power"
module
End
End
First issue 10 / 04 11
No picture
Check Image board
Not correct
Correct
Replace
Image board
Replace
PDP module
End
End
12 First issue 10 /04
Vertical line fail
Check XR Board
Check Logic Board
Not correct
Correct
Not correct
Correct
Replace
XR
Board
Replace
Logic
Board
Replace
PDP module
End
End
End
First issue 10 / 04 13
Horizontal line fail
Check Y-SUS Board
Check Y DRV-Top
Not correct
Correct
Not correct
Correct
Replace
Y-SUS
Board
Replace
Y DRV-Top
Replace
PDP module
End
Check Z-SUS Board
Not correct
Correct
Replace
Z-SUS
Board
End
End
Check Y DRV-Bottom
Not correct
Correct
Replace Y
DRV-Bottom
End
End
14 First issue 10 /04
No command
Switch the
power on
Check remote control
Check Front Button
Control Board
Not correct
Correct
Not correct
Correct
Replace the
battery or the
remote control
Replace
Front Button
Control Board
Replace Image
Board
End
End
End
First issue 10 / 04 15
ADJUSTMENTS
PANEL voltage adjustment
1.1 Origin Power (PLG-421)
1. POWER ON
2. Signal Source: No (black screen).
3. Connect Digital Voltage Meter (-) to Panel GND. Connect Digital Voltage Meter (+) to Plug CN806 Pin#10 and adjust the VA
(Variable Resistor RV204) value to the VA value recorded on the Panel Voltage Label ±0.5VDC (VA ± 0.5VDC= value adjusted).
4. Connect Digital Voltage Meter (-) to Panel GND. Connect Digital Voltage Meter (+) to Plug CN806 Pin#1 and adjust the VS
(Variable Resistor RV203) value to the VS value recorded on the Panel Voltage Label ±0.5VDC (VS ± 0.5VDC= value adjusted).
Remark: The Panel Voltage Label is located at the upper- right corner of the panel.
CN806
RV203
RV204
16 First issue 10 /04
1.2 Dae Gil Power (DGK-420W)
1. POWER ON
2. Signal Source: No (black screen).
3. Connect Digital Voltage Meter (-) to Panel GND. Connect Digital Voltage Meter (+) to Plug CN806 Pin#10 and adjust the VA
(Variable Resistor) value to the VA value recorded on the Panel Voltage Label ± 0.5VDC (VA ± 0.5VDC= value adjusted).
4. Connect Digital Voltage Meter (-) to Panel GND. Connect Digital Voltage Meter (+) to Plug CN806 Pin#1 and adjust the VS
(Variable Resistor) value to the VS value recorded on the Panel Voltage Label ± 0.5VDC (VS ± 0.5VDC= value adjusted).
Remark: The Panel Voltage Label is located at the upper-right corner of the panel.
Color Temperature Adjustment
1.1 Color Temperature setting in DVI Mode
1. Turn on PDP set and warm up for over 30 minutes.
First issue 10 / 04 17
2. Turn on Color Analyzer CA-100 and reset CA-100.
3. Switch PDP input signal source to DVI mode.
4. Set up Video Pattern Generator (Astro, Model= VG-828H).
Timing set = 640 x 480 @ 60Hz;
Video = Panel Link (the DVI output mode)
Connect PDP DVI input connector with Astro to receive DVI signal.
5. Dark level and bright level center block definition:
A. Dark level center block definition:
[WINDOW]
Mode %
Format 1 Window
Flicker None
Size H/V 28.5/34.0 (%)
Analog R/G/B 25/25/25 (10 IRE white output pattern)
B. Bright level center block definition:
[WINDOW]
Mode %
Format 1 Window
Flicker None
Size H/V 28.5/34.0 (%)
Analog R/G/B 153/153/153 (60 IRE white output pattern)
6. There are 4 different modes (DVI / RGB / AV / YPBPR) color temperature setting; there are 3 different color temperatures
(7180K, 8680K and 10180K) in each mode. Each color temperature needs to adjust dark
level, bright level, and R, G, B.
The OSD menu for color temperature factory setting can be viewed by following the ”Factory Setting Procedure”.
Factory Setting Procedure:
A. Press (Zoom -) key for over 5 seconds and release.
B. Press (Zoom+) key for over 5 seconds and release.
C. Press ”ok” key.
D. Factory setting OSD menu shows up. The values shown up on the OSD menu are the factory default setting values.
The factory default setting values differ from each PDP panel module. The color temperature factory setting OSD menus
are as the following:
*Note: When adjusting the color temperature, please note
what is the input source and what input the PDP is, the input
source and the PDP input mode should be the same.
7. Put the color analyzer CA-100 in the center of the screen.
A. 7180K
DV I -CT : 718 0
K
[x : 3 0 8 y : 2 9 8]
GA IN B IAS
RG B RG B
xx xx xx xx xx xx
xx xx
B. 8680K
DV I -CT : 868 0
o
K
[x : 2 8 8 y : 3 0 1]
GA IN B IAS
RG B RG B
xx xx xx xx xx xx
xx xx
C. 10180K
DV I -CT :10180
o
K
[x : 2 7 0 y : 2 9 2]
GA IN B IAS
RG B RG B
xx xx xx xx xx xx
xx xx
(GAIN Gamma) (BIAS Gamma)
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