Philips 50PFP5332D/37 8 blink code (thermal)

[BestYohman]

Fixing a Philips 50PFP5332D/37. The power board had a blink code 8 for thermal. Checked the thermal resistor and it checks out fine lowering the ohms when being heated. I can't find anything on this TV as far as repair manuals so I am at a loss. There is no standby voltage. Any suggestions would help.

[BestYohman]

Re: Philips 50PFP5332D/37 8 blink code (thermal)

Caps around thermal show as good. Transistor doesn't show as stuck open but I can't open gate unless put 9 volts or more on it. Even then only stays open for a second. Bridge rectifier shows that it is working only on last pin reads double the ohms as the rest.

[BestYohman]

Re: Philips 50PFP5332D/37 8 blink code (thermal)

Anyone have any suggestions?

[Andrew F. Ali]

Re: Philips 50PFP5332D/37 8 blink code (thermal)

Could we get pictures of the back of the TV with the rear cover removed so we could see how the various boards are connected?

[BestYohman]

Re: Philips 50PFP5332D/37 8 blink code (thermal)

Here is the back of the TV and some closeups of the powerboats connections. Board is a LJ92-0511A.

[Andrew F. Ali]

Re: Philips 50PFP5332D/37 8 blink code (thermal)

With all the boards connected measure the Std-by 5V. Once you have that. Unplug the connectors with Vs supply on the PSU from the Y-SUS and X-SUS Bds. Measure the Vs voltage. It should be 200-215Vdc if produced.

[BestYohman]

Re: Philips 50PFP5332D/37 8 blink code (thermal)

OK I will check it again when I get home. Last time I checked I wasn't getting any power to anything. All pins showed 0v. But that's while boards were disconnected.

[BestYohman]

Re: Philips 50PFP5332D/37 8 blink code (thermal)

Stand by shows as 7 volts. There is no measurements from vs pins.

[BestYohman]

Re: Philips 50PFP5332D/37 8 blink code (thermal)

The thermister sits at 70 ohms at room temp but lowered when Heated.