Pioneer PDP-5070 issue

[Jbrownin]

Hello there.
New member, enthusiast. My display just developed an issue that I'm hopeful is addressable via a board(s) replacement. As shown in the attached image, display has a horizontal bar on lower half of screen, with a split image.No blinking LEDs. Based on my rather recent investigation, seems this is likely a lower Scan A assy(buffer board?) fault. Perhaps also Y main drive and Y sub drive?
Any guidance on a fix/ replacement part(s) and also reputable source of such parts (no way ebay) would be greatly appreciated. I'm aware of the trap switch and also the need to allow for V discharge prior to wrenching on stuff...
I'm hoping on a fix vs junking the TV, which up until yesterday had an exceptional picture (calibrated, of course).
Thank you
Kindest regards
JB

[tom66]

Re: Pioneer PDP-5070 issue

This looks like a scan buffer board failure. However before diagnosing this fault make sure to check the panel itself for cracks. I can see a thin black line on the panel which looks to be unilluminated in the fault area. If the panel were to be cracked in that area, you might see this fault. Sometimes, although it is exceedingly rare on well-designed panels like Pioneer ones, the glass can crack under use, and it can be almost invisible if it is right on an edge.

Example of possible panel crack fault: https://www.youtube.com/watch?v=e26jLO-kJJQ

[Jbrownin]

Re: Pioneer PDP-5070 issue

Thank you. I went to re-inspect with a good flashlight, and i indeed see a crack (almost like a bb shot/ star pattern). Panel is toast... thank you for your time and insight.
Cheers

[dick_barton]

Re: Pioneer PDP-5070 issue

That's really sharp eyes there Tom66 to see the unilluminated line in that photo.