THOMSON 50WB03P Schematic
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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.
- 0903
Plasma
SERVICE MANUAL
DOCUMENTATION TECHNIQUE
TECHNISCHE DOKUMENTATION
DOCUMENTAZIONE TECNICA
DOCUMENTACION TECNICA
TV
50WB03P
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 09 / 03 3
Page
SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
DISASSEMBLING THE MODULES
Removing the SW Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Removing the Digital Video . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Removing the Y Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Removing the X Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
BOARD LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
DIAGNOSTIC
Led Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
HDCP protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
BLOCK DIAGRAM
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
RGB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Digital Video . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
X Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Y Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Sub Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
ADR Resonnance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Address connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SIGNAL PATH
Video and Synchronisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Video Slot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
ADJUSTMENTS
Adjusting modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Adjustments required after modules replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
CONTENTS
4 First issue 09 /03
SAFETY PRECAUTIONS
NOTICE: Comply with all cautions and safety related notes located on or inside the cabinet and on the chassis.
The following precautions should be observed:
1. When service is required, even though the PDP UNIT an isolation transformer should be inserted between the power line and the set
in safety before any service is performed.
2. When replacing a chassis in the set, all the protective devices must be put back in place, such as barriers, nonmetallic knobs,
adjustment and compartment cover shields, isolation resistor capacitor, etc.
3. When service is required, observe the original lead dress. Extra precaution should be taken to assure correct lead dress in the high
voltage circuitry area.
4. Always use the manufacturer's replacement components. Especially critical components as indicated on the circuit diagram should
not be replaced by other manufacturers. Furthermore where a short circuit has occurred, replace those components that indicate
evidence of overheating.
5. Before returning a serviced set to the customer, the service technician must thoroughly test the unit to be certain that it is completely
safe to operate without danger of electrical shock. Also be sure that no protective device built into the set by the manufacture has
become defective, or inadvertently defeated during servicing. Therefore, the following checks should be performed for the continued
protection of the customer and service technician.
6. Perform the following precautions against unwanted radiation and rise in internal temperature.
• Always return the internal wiring to the original styling.
• Attach parts (Gasket, Ferrite Core, Ground, Rear Cover, Shield Case etc.) surely after disassembly.
7. Perform the following precautions for the PDP panel.
• When the front case is removed, make sure nothing hits the panel face, panel corner, and panel edge (so that the glass does not break).
• Make sure that the panel vent does not break. (Check that the cover is attached.)
• Handle the FPC connected to the panel carefully.
Twisting or pulling the FPC when connecting it to the connector will cause it to peel off from the panel.
8. Pay attention to the following.
• When the front case is removed, infrared ray is radiated and may disturb reception of the remote control unit.
• Pay extreme caution when the front case and rear panel are removed because this may cause a high risk of disturbance to TVs and
radios in the surrounding.
Leakage Current Cold Check
With the AC plug removed from an AC power source, place a jumper across the two plug prongs. Turn the AC power switch on.
Using an insulation tester (DC 500V), connect one lead to the shortcut AC plugs and touch the other lead to each exposed metal part
(input/output terminals, screw heads, metal overlays, control shafts, etc.), particularly any exposed metal part having a return path to
the chassis. Exposed metal parts having a return path to the chassis should have a minimum resistor reading of 0.3MΩ and a
maximum resistor reading of 5MΩ . Any resistor value below or above this range indicates an abnormality that requires corrective
action. Exposed metal parts not having a return path to the chassis will indicate an open circuit.
Leakage Current Hot Check
Plug the AC line cord directly into an AC power source (do not use an isolation transformer for this check). Turn the AC power switch
on. Using a "Leakage Current Tester", measure for current from all exposed metal parts of the cabinet (input/output terminals, screw
heads, metal overlays, control shaft, etc.). Do this particularly for any exposed metal part having a return path to the chassis, to a
known earth ground (water pipe, conduit, etc.). Any current measured must not exceed 0.5mA.
ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL
SHOCK HAZARD AND MUST BE CORRECTED BEFORE
RETURNING THE SET TO THE CUSTOMER.
Leakage
current
tester
Reading should
not be above
0.5mA
Device
under
test
Test all
exposed metal
surfaces
Also test with
plug reversed
(Using AC adapter
plug as required)
Earth
ground
AC Leakage Test
First issue 09 / 03 5
Charged Section
The places where the commercial AC power is used without passing through the power supply transformer. If the places are touched,
there is a risk of electric shock. In addition, the measuring equipment can be damaged if it is connected to the GND of the charged
section and the GND of the non-charged section while connecting the set directly to the commercial AC power supply. Therefore, be
sure to connect the set via an insulated transformer and supply the current.
1. AC Power Cord
2. AC Inlet with Filter
3. Power Switch (S1)
4. Fuse (In the SW POWER SUPPLY Module)
5. Standby Transformer and Converter Transformer (In the SW POWER SUPPLY Module)
6. Other primary side of the SW POWER SUPPLY Module
High Voltage Generating Point
The places where voltage is 100V or more except for the charged places described above. If the places are touched, there is a risk of
electric shock.
1. SW POWER SUPPLY Module . . . . . . . . . . . . . . . . . . (225V) 5. SCAN (B) Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . (355V)
2. X DRIVE Assembly . . . . . . . . . . . . . . . . . . . (–300V to 225V) 6. X CONNECTOR (A) Assembly . . . . . . . . . . . (–300V to 225V)
3. Y DRIVE Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . (355V) 7. X CONNECTOR (B) Assembly . . . . . . . . . . .(–300V to 225V)
4. SCAN (A) Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . (355V)
X DRIVE
Assy
X CONNECTOR (B)
Assy
AC Inlet with Filter
Power Cord
Power Switch
(S1)
Y DRIVE
Assy
SCAN (A)
Assy
SCAN (B)
Assy
X CONNECTOR (A)
Assy
SW POWER SUPPLY
Module
Top
Front
Charged Section and High Voltage Generating Point (Rear View)
: Part is the High Voltage Generating Points
other than the Charged Section.
: Part is Charged Section.
6 First issue 09 /03
DISASSEMBLING THE MODULES
SW Power Supply Module
1 Remove the Rear Case (50M). (Screws x 20) fig. 1
2 Remove the four screws. fig. 2
3 Remove the SW Power Supply Module. fig. 2
4 Insert the SW Power Supply Module into the slits of Sub Frame L and R. fig. 3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
SW Power Supply
Module
3
2
2
2
2
Sub Frame L
Slit
SW Power Supply
Module
Sub Frame R
4
SW Power Supply
Module
fig. 1
fig. 2
fig. 3
First issue 09 / 03 7
DIGITAL VIDEO Assembly
1 Remove the Rear Case (50M). (Screws x 20) fig. 1
2 Remove the SW Power Supply Module. (Connectors, Screws x 4) fig. 2 and fig. 3
3 Remove the 11 screws. fig. 4
4 Remove the one screw. fig. 5
5 Remove the Terminal Panel M. fig. 5
6 Remove the SLOT TMM SERVICE Assembly. fig. 6
7 Remove the four screws. fig. 6
8 Remove the one screw to remove the switch. fig. 6
9 Remove the connectors and binders, and remove the RGB Base with PCB Assembly. fig. 6
10 Remove the DIGITAL VIDEO Assy. (Connectors, circuit board spacers x 6) fig. 7
3
3
3
3
3
3
3
Terminal panel M
4
5
RGB Assy
SLOT TMM SERVICE Assy
RGB base
7
7
8
7
7
6
9
10
DIGITAL VIDEO Assy
fig. 4
fig. 5
fig. 6
fig. 7
8 First issue 09 /03
Y DRIVE Assembly
1 Remove the three screws. fig. 8
2 Loosen the Rivet. fig. 8
3 Remove the Lead Cover. fig. 8
4 Pull out the Flexible Cable. fig. 8
5 Detach the lower part of the Front Case 50 so that it can swing open hinged at the top. fig. 9
6 Remove the Front Case 50. fig. 9
7 Remove the Rear Case (50M). (Screws x 20) fig. 1
8 Remove the Y DRIVE Assy. (Connectors, Screws x 8) fig. 10
X DRIVE Assembly
1 Remove the Rear Case (50M). (Screws x 20) fig. 1
2 Remove the X DRIVE Assy. (Connectors, Screws x 8) fig. 11
2
3
Turn the Rivet, taking care not to push
on it, because pushing on it may set
the Rivet to its original position.
Remove the Lead Cover together
with the Rivet when the Rivet is fully
loosened.
Rivet
1
Front Case 50
Lead Cover
Lead Cover
SIDE KEY
Assy
44
5
6
Front Case 50
Aluminum
Materials
The hook of the Front Case 50 is
fixed with the Rear Case (50M) and
the aluminum material, as shown in
the illustration.
Rear Case
(50M)
8
8
8
8
Y DRIVE Assy
8
2
2
X DRIVE Assy
2
2
fig. 8
fig. 9
fig. 10
fig. 11
First issue 09 / 03 9
BOARD LOCATION
DIGITAL VIDEO
Assy
BRIDGE B
Assy
ADR CONNECT D
Assy
CLAMP C
Assy
FRONT KEY
TMM Assy
SP OUT R
Assy
SP OUT L
Assy
CONTROL TMM
Assy
KEY
CONNECTOR
Assy
IR RCA Assy
CLAMP D
Assy
CLAMP B
Assy
TMM AUDIO
Assy
X CONNECTOR (A)
X CONNECTOR (B)
Assy
MX LED
Assy
X DRIVE
Assy
SLOT TMM SERVICE
Assy
ADR CONNECT A
Assy
Y DRIVE
Assy
SCAN (A)
Assy
SENSOR
Assy
BRIDGE A
Assy
SCAN (B)
Assy
ADR CONNECT B
Assy
ADR RESONANCE
Assy
SUB ADDRESS A
Assy
SUB ADDRESS B
Assy
ADR RESONANCE
Assy
ADR CONNECT C
Assy
ADR CONNECT D
Assy
CLAMP A
Assy
ADR CONNECT C
Assy
I/O TMM
Assy
RGB Assy
SLOT CONNECTOR
Assy
SW POWER SUPPLY
Module
BRIDGE C
Assy
BRIDGE D
Assy
ADR CONNECT B
Assy
ADR CONNECT A
Assy
Assy
10 First issue 09 /03
DIAGNOSTIC
LED
Normal status
Error Status
This is an easy self-diagnostic function by Light Emitting Diode. When PDP does not operate, it shows a reason.
However, it is the simple version. It may not be perfect though regrettable.
Blink of GREEN Light Emitting Diode.
(Ex.: IIC communication NG of MODULE microcomputer. )
Blink of RED Light Emitting Diode
LED STATUS COMMENTS
REDThis indicator is red during standby mode
GREEN This indicator turns to green when the unit is in the FEB mode.
ORANGE This indicator turns to green when the unit is in the STAND-ALONE mode.
Normal Status
Slowly flashes GREEN Power-Management function is operating.
The number of times of blink The reason of a SHUTDOWN
1Communication NG with PANEL microcomputer
2 IIC communication NG of MODULE microcomputer
3Dew condensation NG
4 High temperature NG
5
FAN NG
FAN UNIT PD or Connection fault of the cable to FAN Assembly
6Communication NG with MODULE microcomputer
7Communication NG with WIDE microcomputer
8 IIC communication NG of MAIN microcomputer
9Connection fault of the cable to AUDIO Assembly
It is mainly various poor communications. It is possible to carry out power on again
Green lighting 200ms
The light is not switched on 3s
Blank 100ms Green lighting 200ms
The number of times of blink
The chief reason of a power down
1 Y-DRIVE NG
2
X-DC/DC CONVERTOR NG
Y-DC/DC CONVERTOR NG
3
4 X-DRIVE NG
5POWER SUPPLY NG
6
ADDRESS NG
7ADDRESS RESONANCE NG
8
DC/DC CONVERTOR (DIGITAL) NG
If you switch on a power on again, you once have to shut the main power supply.
First issue 09 / 03 11
(Ex.: 1st -> Y-DC/DC CONVERTOR, 2nd -> Y-DRIVE)
Update status
This is in the special state about update of a firmware.
HDCP PROTECTION
Red lighting
200ms
Blank 3s
Blank 1s
Blank
100ms
Red lighting
200ms
Red lighting
200ms
1st 2nd
Slowly flashes
GREEN and RED
Quickly flashes
GREEN and RED
Updating standby or updating end of the Main microcomputer
Or updating end of the Main microcomputer
Main microcomputer is under update.
GREEN When updating data other than the Main microcomputer, it will be in this state
LED STATUS COMMENTS
Normal Status
The detection block of abnormalities
POWER SUPPLY
REGULATOR
SHARP PQ3DZ13
TMDS Rx
Si907B
LOGIC
Circuit
TC74VHC02
MAIN
microcomputer
Detect A.
Rear Case
Open detect
Detect B.
SLOT ST2
Detect C.
PORT I/O SW1
OUTPUT ENABLE
POWER SUPPLY
Module
The history of a LOCK
mechanism of operation
E2PROM (Main)
PORT I/O
EXPANDER
CXA
HDCP key
POWER CONTROL
H : ACTIVE
SW3 S W1
VIDEO
SIGNAL
DVI
TMDS
3.3V
I2C
OUTPUT ENABLE
12 First issue 09 /03
Detection in protection mode
The structure of three detections was prepared.
a. Opening of a Rear case is detected by mechanical switch.
b. Simple logic via a connector.
c. It is necessary to control IC by I2C from MAIN microcomputer.
Detection of B and C is for not operating SLOT independently.
Protection mode
When operation of abnormalities is detected, the MAIN microcomputer memorizes a history to E2PROM (MAIN). And it will change to
protection mode.
Light Emitting Diode blinks as follows at the time of protection mode.
Even if you are going to supply AC again, it goes into protection mode again by the history memorized by E2PROM.
Release in protection mode
A procedure is shown below.
1. Pushing INPUT of BODY-KEY is continued 5 seconds or more.
2. Light Emitting Diode changes to lighting of the red that shows a standby state from blink in protection mode.
3. You have to push the following keys in order within 5 seconds from red lighting.
VOL - -> INPUT -> VOL+ -> POWER ON
CAUTION:
PDP will return to protection mode again, when release is impossible within 5 seconds and a mistake is made in pushing body-key.
Red 200 ms
Blank 1100 ms
Blank 100 ms Green 200 ms
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