Riddled TV Repair Forum

SteveS · Joined: 22 Aug 2010 Posts: 13 Location: North Carolina

Hehe, Yeah I know it's a cap somewhere, just have no idea which one.
Replaced C626 which is the biggest one in that set of power supply circuits, so I know at least one of them is good.

I've heard that sometimes caps develop a short, and that it can open up again if enough voltage is applied. It's a vague memory, and I'm not sure how reliable that theory is.

I'll probably just juice it again with 9V if it fails, and keep doing this until the bad cap finally pops it's lid.

Yet another case of "yep I fixed it. No idea what was wrong, but it works now" Very Happy

Thanks for all the guidance and help.

Google

JTS1957 · Joined: 21 Jan 2009 Posts: 1331 Location: Far, Far Away

Is there an echo in here? I could have sworn I just said sumthin 2 dat iffect. Neutral

I only see 5 lytics that are 120 ohm or less away from that foil: C629; C218; C206; C401 & C497.

SteveS · Joined: 22 Aug 2010 Posts: 13 Location: North Carolina

Ah, Sorry. I was a bit slow to make the connection with what you said about bench testing. Smile

With that short parts list, I think I'm going to replace them all and be done with this project for good.

Thanks again.

JTS1957 · Joined: 21 Jan 2009 Posts: 1331 Location: Far, Far Away

I'm just saying that in a power distribution system a particular point normally has a certain voltage. If you want to replace that now low or missing voltage with your own voltage, that can be a useful troubleshooting technique.
Having said that, the power supply you use must be capable of supplying that voltage at the current rating it normally needs, and preferable be well protected. Being able to monitor the voltage and/or current is also useful.

Remember we ARE making an assumption that's a cap that is the culprit.