Mar 13, 2012, 11:19 AM
Post #1 of 3
premise: I am not a professional repairman and I write from Italy (I'm sorry for bad english ).
replace psu on Panasonic TH-37px7e
I should replace the power supply module (TNPA4268) on my TV (Panasonic TH-37PX7E) because the TV has begun to turn off after about 15 ', if I turn it on again stay on few minutes and then turn off, at the end no way to turn on. I have checked some fuses and resistors but are ok.
I found, at low price :-) , a used psu so I decided to replace it.
The service manual says that when replacing the psu must be adjusted Vsus (at the value indicated on the label inside TV) and the PFC. How I do this? Before I must setting the two trimmers halfway, then with the tester connected, turn on the TV and then set the trimmers ? or I leave the trimmers at the current location and then proceed with the adjustment? I read that Vsus must not be less than Ve in order not to damage the pcb, I would not do damage !!!
Another question: for make the adjustment I need send a 100% white image to TV (i have a dvd with colors bars and other images) or it's unnecessary ?
Thanks in advance for your help.