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Okay, curious results of parallel capacitor on 240V Boost.
I remembered I had a 560p 2KV capacitor, so I decided to use that in parallel to the 600p 2KV across the boost diode. The results were noticeable, but didn't eliminate the bars, but did reduce them. Don't know if it reduced the ringing or the overall brightness of screen. I'm assuming it hasn't done anything to eliminate the bars, just made them dimmer, which might mean an overall dimmer screen? If the original cap is in spec, then I upped it to around 1160.
Anyway, I also measured voltage. On the supply side from the flyback, it's 131V. On the other side of the diode, it's 249V. I'm assuming that is within specs for the 240V boost circuit.
I've attached a couple of pics. They look similar, but the one with cap is dimmer. I figure the bars should have changed in other ways, narrower, less of them, etc.
Tomorrow I'll try across the damper diode. Need to put the set on its side and remove the base and access panel for that.
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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; 05-06-2026 at 06:32 PM.
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