Hitachi p60x901 Power supply

[topfli8979]

I picked up a Hitachi P60x901 Plasma tv, upon initial diagnosis I found the lower sdr board had 4 ic's with pin holes. Ordered the new very rare sdr board, and finally received it this week. Installed. Powered up the unit, get 2-clicks as should, fans kick on, then everything drops out. There blue power light li blinking 2 times, which according to the manual is a xsus prob. But I went ahead and measured the va 12.01v, should be 177v. Vs should be 64v, but is reading as 6 mv. I assume power supply is bad. What should I check first?

[Mrx3750]

Re: Hitachi p60x901 Power supply

4th large capacitor down, on the right side of the image looks like it might be bulging slightly.

[tom66]

Re: Hitachi p60x901 Power supply

Va should not be 177V..... 64V is more realistic for Va but 177V for Vs on these would be rare due to the TERES drive which requires halve the typical Vs so around 80 to 85V.

[topfli8979]

Re: Hitachi p60x901 Power supply

Yea sorry Im dislexic sometimes. The va should be 68.2, vs 177.7. The fourth cap down on right is slightly bulged, another guy on a different forum had same cap buldged turned out to be fine. I think it getting the pfc voltage fine, just something shutting it down.

[tom66]

Re: Hitachi p60x901 Power supply

Have you checked the PFC voltage?

[topfli8979]

Re: Hitachi p60x901 Power supply

Tom do you have a manual for this model?

[tom66]

Re: Hitachi p60x901 Power supply

If I have one it will be on the site...

I do not have 60" but I have 50" which may be close enough

[topfli8979]

Re: Hitachi p60x901 Power supply

I cant seem to find on the power supply where to check the pfc voltage? I have the manual, but not really helping.

[tom66]

Re: Hitachi p60x901 Power supply

Across the large 450V capacitors.