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LG 42LF65

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Keith:
Hi all,

Picture goes after about 15 minutes, back lights are OK, sound OK. I have done the filter mod, but problem is still there! Any ideas?

Thanks

Keith

watteau:
Hi,
Have you checked the LT supplies when the fault occurs?
I've had problems with the 100ufd capacitors decoupling the outputs from the stabilisers (C970 etc.).
Worth a check.
Regards,
John.

Keith:
The PSU outputs are clean and good.

The problem was IC901 on SSB 3.3V regulator

Keith

stellaman:
Keith, what was the component number and where did you source it from? Was it a AZ1085S if so where can I buy one?

Thanks, Dave

Keith:
Hi Dave

Original part is FAN1587A33,  3v3 3A.

I couldn't find anything similar at 3A in the same package, so fitted a 5A rated slightly larger package with slight mod to get it in! Tested 2 days continuous no problems.
With the fault the output of the reg only dropped by 100mV, but that would appear to be enough to send the processors scatty.

Keith

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