Question about Televison & Video
Heard a pop lost picture, still have audio. Removed back, no visual problems. Fuses check good, no bulging capacitors or signs of short. Found info on the web that said check voltages on terminals to/from powerboard and YSUS and ZSUS boards. Voltages seem to check out. Powerboard to YSUS = 5V on 5v term., 191v on all 3 VS term., 65v on both VA term. Powerboard to ZSUS = 5V on 5v term., 191v on both VS term., 65v on VA term. Same at individual board terminals. I'm no tv tech. but I'm an electrician and know how to safely use a meter. You mentioned some thing about bufferboards on a related subject on this site. I have not removed any boards or connectors yet. I will try to attach and image not sure if it will work. [IMG]http://i296.photobucket.com/albums/mm177/yamhamr/visiotvinards002resized.jpg[/IMG]
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Posted on Jan 02, 2017
Have another look at the capacitors you've got. If one of the leads is marked as negative (suppose it's possible that the other would be marked as positive instead, but the standard is usually to mark the negative) then you don't need a bipolar capacitor (for capacitors with one lead coming out each end, look for a band round one end of the capacitor with small minus signs printed on it. For capacitors with both leads coming out the same end, look for a stripe down one side). On the other hand, if there's no indication which lead is meant to be which, you probably need bipolar. If your application needs low ESR, then it needs it. If it doesn't, putting low ESR caps in will do no harm other than pushing the price up a bit and maybe having a bigger footprint. A.
Posted on May 04, 2007
The part that caused the fuse to blow is the hybrid that is mounted underneath the heatsink on the YSUS and ZSUS boards. The part used on these boards might be YPPD-J017C or YPPD-J018C, in about 90% of the time, replacing these hybrids fixes the plasmas with no video but good audio. Since VS and GND is shorted, that means that the hybrid has shorted internally. Most service techs would rather replace the entire YSUS or ZSUS boards since the hybrids are very difficult to remove.
Let me know if you require further assistance.
Posted on Apr 09, 2010
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