Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

[ReeceyBurger123]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Nooooo ! I will buy it !

[ReeceyBurger123]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Do not trash it i will buy it !

[ReeceyBurger123]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Send me a pm !

[niblettr]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Jumped the gun there a bit. Tv won't fit in the bin and Mrs has stopped nagging every 5 minutes..
Does seem a shame to get rid and really hope this is not a panel problem. Reason I say this is that all the voltages check out.

As the fault (8 flashes) points to ADRS fault) I checked the voltages onto 8 address boards, 4 on the top of the panel, 4 on
the bottom of the panel and they seem fine. The ribbons cables going to them seem fine.

Also, got to check if the x sustain (with the possibly incorrect silk screen) was put in by previos owner an may be wrong model board?
Its model number is ANP2195-A

Other than checking around where I have repaired already (check that the fets are being driven etc) I don't know where else
to check.

[ReeceyBurger123]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

The faulty, fets might have burnt up a couple of their resistors etc. Have you checked their related smd components ?

[niblettr]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Yes, I checked the gate resistors. The driver ics (sot23-6) we're checked for shorts to GND so far. I need to check with a scope to see if gates of Fets are being driven by drivers to test drivers properly.

I am suspecting bust panel because when I power up and screen comes on I get a faint buzz and then a power down 8 flash fault. Then if I unplug the top right and bottom right address board the buzz does not happen and I don't get an 8 flash error.

[ReeceyBurger123]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

The screen would only be bust if its cracked though they really cant fail in any other way, is it cracked at all ?

[niblettr]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

However I do get another fault but not a flashing red one (must be a blue one) will investigate more later.

[niblettr]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

No cracks that I can tell

[ReeceyBurger123]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Cant be the panel then, sounds like your control board isnt telling the Y drive to sustain properly. I had this with a Samsung guessing the shorted Ymain damaged the Control board and it was causing some weird things on the screen. Tom will be able to help you if you get a scope though.

[tom66]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Cant be the panel then, sounds like your control board isnt telling the Y drive to sustain properly. I had this with a Samsung guessing the shorted Ymain damaged the Control board and it was causing some weird things on the screen. Tom will be able to help you if you get a scope though.

unlikely, I don't see a Y-main easily damaging the control board.

No cracks that I can tell

Could be shorted address lines, will be failed panel usually if it gives 8 red flashes after brief image.

[niblettr]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Is there an easy way to confirm this?

[niblettr]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Just seems strange that TV had 2 faults at the same time that seem unrelated.

[ReeceyBurger123]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

I dont personally think its the screen as if it was the Tv would not have worked in the first place but then the Y drive failed something else could have failed when the fets did.

[ReeceyBurger123]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Also you can actually see the shorted address lines inside the screen when its off, you will be able to see one of the wires in the scree shorting out to the one behind it. But the VERY VERY RARELY happens.

[niblettr]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Bloody ribbon bonded on the screen was torn! FFS.

[ReeceyBurger123]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Nooooooo

[ReeceyBurger123]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Got an image of it possibly might be fixable ?

[tom66]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Sadly it probably isn't if it's the address lines. These are nice TVs, but good luck reattaching the cables with 4000+ drive lines (for just a 720p TV! a 1080p one has nearly 6000!)#
8G and 9G Kuros do occasionally have panel failures, but it's one of the more rare failure modes.

[ReeceyBurger123]

Re: Pioneer PDP-LX508D Won't turn on, 3 flashes from PSU

Thats real crap Ohh well good effort Niblettr always worth a try buddy