Funai Model LC220EM2 PS Issues

[walldog1]

Re: Funai Model LC220EM2 PS Issues

Picture showed round flat with 2 mounting holes and only 2 leads. Maybe case is 3rd lead? Current Q602 is the common usual small body (3-4mm) with three leads.

[walldog1]

Re: Funai Model LC220EM2 PS Issues

I just looked at a PDF and it will work. Must of had a bad link before, sorry.

[walldog1]

Re: Funai Model LC220EM2 PS Issues

PDF shows it will work, bad link before I guess.

[CapLeaker]

Re: Funai Model LC220EM2 PS Issues

R602 is fine. Don't worry about that. The BC337 has a different pin out than the original transistor. You could leave one of the legs longer and bend them to the pin out you need.

[CapLeaker]

Re: Funai Model LC220EM2 PS Issues

The Mosfet I picked is a direct replacement. Not sure if I can find something better than the BC337 to replace the driver transistor.

[walldog1]

Re: Funai Model LC220EM2 PS Issues

You are correct. I just explained in different post what my mistake was. Thanks again. I wish I would have held off on my Mouser order until now.

[budm]

Re: Funai Model LC220EM2 PS Issues

The 0.8 Ohm reading is due to the added probe leads resistance, so you are OK, I am surprised that it survived.

[walldog1]

Re: Funai Model LC220EM2 PS Issues

I could not amend my order with Mouser this morning, but they waived the shipping on the BC33740TA. YEAH! This NPN had the highest Hfe of the 3 to pick from. I assumed it was bad as when I finally figured out C,B,E from PDF's and plugged it into my meter on Hfe setting, it read zero.

I never used this feature before but I guess it must apply some current or voltage and you would get some number on the meter. And yes, I will have to twist the leads on new Q602 as different CBE order. Thanks, and I'll let you know in a few days if it all works.

[walldog1]

Re: Funai Model LC220EM2 PS Issues

Thanks budm & Capleaker for your help and advice. I put in all the new parts today, plugged it in and the fuse did not blow. I was happy, but I waited a couple of minutes. Then I decided to get meter and start checking Voltages. That is when I smelled smoke and then the fuse F601 blew. Smoke came from L601, AC Voltage line conditioner. I touched it and it was very hot! It must be shorted on bottom side because the top and sides look new!

So maybe L601 WAS THE ORIGINAL CULPRIT all along and he wiped out everything downstream. All my Zener's were shorted again. I did not bother testing Transistors. This is getting recycled. Too bad, it worked so good those first 2 hours.

I did gain valuable knowledge during this process (and only cost me $23), so again I say "Thanks" I hope this thread helps someone else someday. I now have lots of spare parts that I'll probably never use.