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50WS94E
Schematic
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Thomson 50WS94E Schematic

SERVICE MANUAL DOCUMENTATION TECHNIQUE TECHNISCHE DOKUMENTATION DOCUMENTAZIONE TECNICA DOCUMENTACION TECNICA
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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.
- 0602
50WS94E
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 06 / 02 3
Page Page
DISASSEMBLY
Removing the back panel . . . . . . . . . . . . . . . . . . . 4
Removing the module assembly . . . . . . . . . . . . . . 5
Removing the PDP module . . . . . . . . . . . . . . . . . . 7
WIRE LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DIAGNOSTIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
VIDEO TROUBLESHOOTING
No picture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
No RGB signal . . . . . . . . . . . . . . . . . . . . . . . . . . .15
No HD/DVD picture . . . . . . . . . . . . . . . . . . . . . . .15
No still pictures of PC . . . . . . . . . . . . . . . . . . . . .16
No interlace motion picture . . . . . . . . . . . . . . . . .16
No progressive motion picture . . . . . . . . . . . . . .16
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Video screen position . . . . . . . . . . . . . . . . . . . . . 18
DVD/HD/DTV screen position . . . . . . . . . . . . . . . 18
RGB/PC signal timing table . . . . . . . . . . . . . . . . . 19
ADJUSTMENT LOCATION
MAIN module . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
VIDEO module . . . . . . . . . . . . . . . . . . . . . . . . . . 28
POWER module . . . . . . . . . . . . . . . . . . . . . . . . . 29
SUB module . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
BLOCK DIAGRAMS
MAIN module . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
VIDEO module . . . . . . . . . . . . . . . . . . . . . . . . . . 31
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . 32

CONTENTS

DISASSEMBLY

1. Removing the back panel assembly
- Remove the 6 screws and take out the foot holder assembly ,
- Remove the 32 screws and the 2 screws ,
- Unscrew the 8 screws around the audio/video output and lift the back cover up.
05
04
030206
01
4 First issue 06 /02
Fig. 1-1
Fig. 1-2
01
06
02 02 02 02 02
02
02
05
02
01
02
04
04
02
02
02
02
02
04
02
04
02
02
03
03
02 02
0202
04
04
02 02 02 02 02 02 02
First issue 06 / 02 5
2. Removing the module assembly
- Remove the 2 screws and lift the bracket up,
- Unscrew the 8 screws and remove the shield cover ,
- Remove the 2 screws and the metal bracket,
- Unscrew the 8 screws , disconnect F2 (see fig. 2-4) and remove the fans,
- Remove the 12 screws ,
14
1312111009
08
07
Fig. 2-1
Fig. 2-2
1007
TOP
12
14
20
14
09
09
07 08
2111
12
09
09
14
14
14
AD
19
TOP
14
11
1414
14
1414
14
6 First issue 06 /02
- Remove the 8 screws ,
- Unscrew the 2 screws and remove the SENT/SENS boards and brackets,
- Unscrew the screws and remove the ground terminal (see fig. 2-2),
- Disconnect SW and LE connectors,
- Unscrew the screws and lift the ground terminal of AD connector,
- Disconnect AD connector ,
192118
17
20
16
15
Fig. 2-4
Fig. 2-3
1616
15
15
TOP
15
15
T4
AD
15
15
T1 T2
15
15
PH PD
TOP
PM PN
PQ PV PA
PI
PW
LE
18
F2
13
PM PN
LD PW
AE SW RS
LM RM AB AE
AD F1 T1
SY PL
BU YU PC
RM LM
DS
SY
BU YU
PC
ABPVPQ
PL
RS
SW
17
First issue 06 / 02 7
- Remove CN104 connector,
- Slightly lift the module assembly to disconnect CN105,
- Remove the module assembly
3. Removing the PDP module
- Remove the board assembly as explained in the previous chapter,
- Unscrew the 4 screws at the corners of the PDP module,
- Remove the PDP module
Fig. 2-5

WIRE LOCATION

After replacement of the modules insert the connectors as specified below and refer to the following diagram to mount ferrites.
• CN-AD Module -> MAIN PWB (AD)
• Left fan cable Fan -> MAIN PWB (F2)
• Right fan cable Fan -> MAIN PWB (F1)
• CN-PM MAIN PWB (PM) -> Power unit (PM)
• CN-PN MAIN PWB (PN) -> Power unit (PN)
• CN-SY MAIN PWB (SY) -> VIDEO PWB (SY)
• CN-BU MAIN PWB (BU) -> VIDEO PWB (BU)
• CN-YU MAIN PWB (YU) -> VIDEO PWB (YU)
• CN-PC MAIN PWB (PC) -> VIDEO PWB (PC)
• CN-PL MAIN PWB (PL) -> PANEL PWB (PL) (PL label side)
• CN-RS MAIN PWB (RS) -> 232C PWB (RS)
• CN-AE MAIN PWB (AE) -> AUDIO PWB (AE)
• CN-T1 SENS PWB (T2) -> MAIN PWB (T1)
• CN-SW CTL PWB (SW) -> MAIN PWB (SW)
• CN-LD LED PWB (LD) -> MAIN PWB (LD)
• CN-PW PWR PWB (PW) -> MAIN PWB (PW)
• CN-T2 SENS PWB (T1) -> SENT PWB (T4)
• CN-PD Module CN105 -> Power unit (PD)
• CN-PH Module CN104 -> Power unit (PH)
• Inlet ASSY Inlet ASSY -> Power unit (PI)
• CN-PA Power unit (PA) -> AUDIO PWB (PA)
• CN-PQ Power unit (PQ) -> VIDEO PWB (PQ)
• CN-PV Power unit (PV) -> VIDEO PWB (PV)
• CN-AB VIDEO PWB (AB) -> AUDIO PWB (AB)
• CN-DS VIDEO PWB (DS)
• CN-LM SP PWB (LM) -> AUDIO PWB (LM)
• CN-RM SP PWB (RM) -> AUDIO PWB (RM)
CN104
TOP
CN105
8 First issue 06 /02
Wire the connectors, mount the two types of ferrite cores, and bundle the wires by means of clampers, etc.
(Caution) Ferrite cores 3 pcs.
8 pcs.
TOP
AD passed through FL12
Fan and PD fixed to M05
FAN, PD, and PH fixed
AD fixed
PQ, PV, PA, LD, and PW fixed to M05
Green wire fixed
PW
LD
FAN, PD, and T2 fixed
PD and PH passed through FL20 to 22
T4
PH PD
A14
PD and PH fixed
PM PN
PQ PV PA
PI
Fan and PH fixed to M05
F2
AD F1 T1
PM PN
LD PW
AE SW RS
LM RM AB AE
RM LM
T1 and T2 fixed to M05
T1 T2
SY PL
BU YU PC
T2 passed through FL36
DS
SY
BU YU
PC
ABPVPQ
PL
RS
SW
FAN, T1, and PH fixed
T1 passed through FL35
BU,YU, and PC fixed to M05
RS passed through FL6
LD and PW fixed
LM and RM assembled twice on FL33
AB, AE, and PA fixed
LM and RM fixed
PA passed through FL11
AB, PV, PQ, SW, and RS fixed to M05 AE passed through 2 pcs of FL5
Safety Cautions
Cables other than the PI must not enter the area of AC primary side (within the red lines; actual items in the white line) of the power unit A14.
.
First issue 06 / 02 9

DIAGNOSTIC

The power LED located on the front of the display is a bicolour LED wich indicates the operating status including the normal, standby and three error detections
No energization
of POWER unit
Is the power
LED lit ?
See page 10
Is the power LED
flashing green?
See page 11
Is the power LED
lighting green?
The power LED
is lighting red :
Stand-by mode
See page 13
Is the power LED
flashing red?
See page 10
Is the power
LED flashing green
and red?
See page 12
No
No
Yes
Yes
No
Yes
No
Yes
No
Yes
10 First issue 06 /02
Power LED
unlit
Is the power plug correctly
connected to the wall outlet?
Yes
Is there AC 100V behind
the fuses F1 and F2?
Yes
Is there M+7V output at
Pin 1 of the PM connector?
Yes
Is there +5V output at Pin 2
of IC9504 (MAIN module)?
Yes
No
No
No
No
Rearrange the power plug
connection correctly.
Fuses F1 and F2 have blown
out. Replace the fuses. If they
blow out again, the POWER
unit is out of order
Try to disconnect the PW, PQ,
and RS connectors from one
after another. If the output of M+7V is available, the circuits beyond these connectors are
out of order. If no output is
found, the POWER or the
MAIN unit is out of order.
Failure in the PWR module
Is there an output of +5V
at Pin 5 of the LD connector,
Pin 4 of the PW connector
and pin 5 of the RS
connector?
Yes
Failure in the
MAIN module
The power LED
is flashing red
Is 0V observed at Pin 10
of IC9806 (MAIN module)?
No
Is 5V observed at Pin 3 of
PN connector (MAIN module)?
No
Yes
Yes
Failure in +5V line. Check the LED,
PWR and RS232C modules
Failure in the POWER unit
Failure in the
MAIN module
No
Failure in the POWER unit
First issue 06 / 02 11
The power LED
is flashing green
Does the fan run when
the main power circuit
is turned ON?
Yes
Connect a voltmeter to Pin
3 of F1 and F2 connectors
(MAIN module) and switch
the power ON
Is 5V available at Pin 3
of P0F1 and P0F2 connectors
(MAIN module)?
Yes
Is 5V available at Pin 3
of PN connectors
(MAIN module)?
Yes
No
No
No
Is 12V available at Pin 1 of
P0F1 and P0F2 connectors
(MAIN module)?
Yes
The fan is out of order on the
side where 5V is available
Failure in the POWER
module or in another IC
that uses A+5V line
No
Failure in the
MAIN module
Failure in the
MAIN module
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