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LG Plasma TV;50PC51-ZB;Chassis:LP78A(B) PP78A (B);no picture an OSD;Sound ok

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Sven76225:
Hi Cheers,

thank you for your answer. I will check the power supply again. I have the circuit diagramm.The circuit diagramm is unfortunately very poor. It is not a detailed schematic. :-( I will search an other Circuit diagramm. To understand how the process works. What signal must be present at the scaler ? Reference signal, Which is transmitted via the LVDS cable. What are the most important parameters (Oscillogram).

regards, Sven

Sven76225:
Hello!

I am looking for a table. A description of what symbolize the LED's. D1-D4 on the CTRL Board. Can you help me?

Thanks for your answer.

regards, Sven

michael first:
hi sven,
usually the LED's onto a LG chassis do not indicate an error code but the presence of various voltages.bye

Sven76225:
Hello Michael,

thank for your answer. Do you know, which voltage missing? The LED's D1 and D2 are off!

Best regards,
Sven

Sven76225:
Hello! I have the Y-Drive Wave measured signal. Duty ratio 10:1. The sweep time I have multiplied by 10.(Please note this to the graphics.[see appendix])
Can I assume this is therefore the YSUS Board in order?
What signal is still important?

Thanks for your answers.

kind regards
Sven

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