Danger
Potentiellement dangereux
Risque de blessure si cette procédure n'est pas suivie correctement. Faites preuve de prudence et suivez tous les avertissements.
Danger

Introduction

The backlight of the display does light up only for a few seconds, one reason is a defective transformer in the inverter stage of the power supply.

In this case, a few windings of the transformer have an short circuit, causing the resistance of the two secondary coils to be different.

The fault of transformer can be detected by measuring the temperature of the transformer left and right side using infrared thermometer or thermal imager. The temperature will differ greatly.

Power supply model number is BN44-00238

Remove power cord. Remove the display stand by removing the two screws on the round plate on the backside of the monitor Open up the backside of the display (display placed face down on cloth to avoid scratches) by carefully releasing the snapped in latches using a screwdriver or opener tool.
  • Remove power cord.

  • Remove the display stand by removing the two screws on the round plate on the backside of the monitor

  • Open up the backside of the display (display placed face down on cloth to avoid scratches) by carefully releasing the snapped in latches using a screwdriver or opener tool.

Ajouter un commentaire

The metal cage housing the PCBs as just stuck to the backside of the LCD. Carefully remove adhesive strips, release the cables to LCD and front panel buttons.
  • The metal cage housing the PCBs as just stuck to the backside of the LCD.

  • Carefully remove adhesive strips, release the cables to LCD and front panel buttons.

  • Remove SMPS PCB (switching mode power supply) by removing screws around.

Ajouter un commentaire

From power board desolder transformer. It has 6 pins on one and 4 pins on the other side. Replace with new transformer. Replace with new transformer.
  • From power board desolder transformer. It has 6 pins on one and 4 pins on the other side.

  • Replace with new transformer.

Ajouter un commentaire

Conclusion

To reassemble your device, follow these instructions in reverse order.

2 autre(s) ont terminé cette réparation.

Thomas Widmaier

Membre depuis le 05/03/2013

1 153 Réputation

6 tutoriels rédigés

Équipe

Master Techs Membre de l'équipe Master Techs

Community

274 membres

713 tutoriels rédigés

Caution!

Myrra 12 V AC Transfor 5VA is not compatible with TM09176

Walter Holzwarth - Réponse

Ajouter un commentaire

Voir les statistiques:

Dernières 24 heures : 4

7 derniers jours : 11

30 derniers jours : 95

Total : 7,641