I've uploaded a video of the problem. Maybe a visual will help. I really don't know where to look as there are multiple places the horizontal sync is processed (IF, video processor module and horizontal module). As suggested I have tapped on everything, wiggled all connections, removed and reseated modules and tested a number of components on the modules.
It no longer seems to be intermittent sync as I have not been able to get it back, even for a moment. Been working on it for about 7 hrs now.
I've ruled out the IF module. See attached pic. It is from test point C1, Detector Output. I see the section where blanking, color burst and horizontal sync take place, followed by the video information.
https://youtu.be/Ftj62sprzNY
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Pioneer SX-1080, Pioneer PL-115D, Pioneer CT-F9191, Pioneer RG-1, Wollensak 8050A, Akai 4000DS MkII, Pioneer CS-05 & Polk 1.2TL
Denon 5803A, Pioneer DVL-700, Pioneer CT-W603RS, Toshiba HD-A3, D-Link DSM-520, Dish VIP-722, Polk 1.2TL, CSi5, LS/fx, RT-800 and PSW-650
Last edited by TinCanAlley; 05-01-2026 at 05:12 PM.
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