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  1. Deze stap is niet vertaald. Help het te vertalen

    : stap 1, afbeelding 1 van 3 : stap 1, afbeelding 2 van 3 : stap 1, afbeelding 3 van 3

    • Remove the 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.

    Vertaal

  3. Deze stap is niet vertaald. Help het te vertalen

    : stap 2, afbeelding 1 van 2 : stap 2, afbeelding 2 van 2

    • 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.

    Vertaal

  4. Deze stap is niet vertaald. Help het te vertalen

    : stap 3, afbeelding 1 van 3 : stap 3, afbeelding 2 van 3 : stap 3, afbeelding 3 van 3

    • Caution: Touching the capacitor wires may cause serious injury. Use a capacitor discharge probe to safely rid the capacitors of dangerous charges.

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

    • Replace with new transformer. (Model TM-09176)

    Vertaal
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Thomas Widmaier

Lid sinds: 03/05/13

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Caution!

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

Walter Holzwarth - Antwoord

Hi, I have the same issue with the same monitor. But in my case, the transformer has equal temperature on both sides. Is there any way for me to check if it’s really the transformer or something else?

One more thing, there is a high-pitched noise coming from the upper part of the screen (probably the backlight), after the screen goes dark again. Thanks!

Kristijan Žganec - Antwoord

High pitched noise is probably the resonance of a coil either the transformer or another inductor of the swtiching regulator circuit.

You could try and measure the inductance / resistance of the transformer (desolder first) and check if they match very closely.

Thomas Widmaier - Antwoord

I took some thermal images (using SeekTermal camera) from the power-supply board of this TV:

The rectangular black transformer TM-09176 (T301) gets 60°C at one side only. But the resistor R301 beside the transformer, gets nearly 100°C! This is maybe due to unregulated high current coming from the transformer? The rest of the board stays very cool.

Dumbo - Antwoord

Measure if there is any short circuit to ground with resistance or continuity mode around the resistor that gets hot.

Maby the CCFL Tube or wire is shorted ?

Thomas Widmaier - Antwoord

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