U5000 blowing HOT - power supply issue

putyoursoxon

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Picked up a U5000, blowing HOTs. Recapped, all service packs, and new flyback, still takes out instantly on power up. Light bulb test confirms issue is on the power supply side. Unloaded I have about 160v, connecting bulb and it starts ticking. Power supply service pack was done. Swapped out u101 and T101, no change. All diodes tested ok. This is the first one I've had blow hots and the issue be on the power supply side. Any idea what I should be checking next?
 
you might have a bad Q703 or bad R760.

check out the document for the list of parts replaced for the NFL Blitz HOT service kit here: https://www.arcaderepair.net/manuals/u5000_service_kits_mecha.pdf

one of those $15 component tester kits makes this process a lot easier. is it doing it for both 15/25 KHz modes? if it's one or the other you could have bad poly caps on the affected resolution.
 
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