Danger
Potentially Dangerous
Injury may result if this procedure is not followed properly. Use caution and follow all warnings.
Danger

Introduction

This type of repair affects many other models of display, as the circuits are very similar.

Here one defect type will be fixed which is a defective transformer in the inverter stage of the power supply.

The transformer has an internal short circuit of a few windings, so the DC resistance of the two secondary coil is a bit different. This transformer has two secondary coils.

This is only one possible fault of this device.

The fault of transformer can be detected very good by measuring the temperature of the transformer left and right side. The temperature will differ greatly.

Power supply model number is BN44-00238

Image 1/3: Remove the display stand by removing the two screws on the round plate on the backside of the monitor Image 2/3: 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. Image 3/3: 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.

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Image 1/2: Carefully remove adhesive strips, release the cables to LCD and front panel buttons. Image 2/2: Remove SMPS PCB (switching mode power supply) by removing screws around.
  • 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.

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Image 1/3: Replace with new transformer. Image 2/3: Replace with new transformer. Image 3/3: 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.

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Conclusion

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

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Thomas Widmaier

Member since: 03/05/2013

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One Comment

Caution!

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

Walter Holzwarth - Reply

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