Panasonic Burned Up! - Page 2 - Videokarma.org TV - Video

jstout66 · #16 08-29-2015, 06:52 PM

well.. Walter found the issue. The power supply in the VCR portion burned up.
The Part number is VEP01272 D-1. If anybody has one or has a lead on a cheap one, let me know, otherwise, this one's getting pitched.

zeno · #17 08-29-2015, 07:07 PM

Quote:

Originally Posted by jstout66

well.. Walter found the issue. The power supply in the VCR portion burned up.
The Part number is VEP01272 D-1. If anybody has one or has a lead on a cheap one, let me know, otherwise, this one's getting pitched.

What burned ? Changing a board is easy but rarely done. Also the
board part ## usually starts with TNP####- IIRC.
Also these sets gave a great pix, they are a cut above consumer
models so must be a problem there. Sams does not cover
industrial or institutional set BTW. Search the model & maybe you
can find a free download.

73 Zeno

rca2000 · #18 08-29-2015, 07:19 PM

Have to agree here. Unless SO much burned on the SMPS..that is is just not repairable (this happens someties--but nOT usually on those little VCR supplies)--it SHOULD be repairable. a new FET or biploar SMPS out transistor, maybe driver transistor if one is used, maybe an optocoupler, bridge, filter cap, filter choke, and a couple of other parts--like the crowbar diode on the cold side--SHOULD get it running.

jstout66 · #19 08-29-2015, 07:38 PM

I'm sure Walter will pipe in shortly for a better explanation, but the board is huge on this one. It has a switching supply, and he thought the transformer went bad, and then it burned up. And boy does it SMELL. I found one site that had the part listed, but NLA for now, and it was $113.00 if they get it in. The set IS unique, but not for me to throw that much money at it.

rca2000 · #20 08-29-2015, 07:59 PM

Can you show the TOP of the SMPS board? I am curious what is burned on the component side. I do NOT thik it is the tranny though.

I suspect the INPUT FILTER CAP...is what you smelled.. And that IC labeled Q1 is SURELY shorted.

jstout66 · #21 08-29-2015, 08:25 PM

I'll have Walter post some pix. It's at his place. And boy did it stink up the truck when I took it over there. You can STILL smell it.

kf4rca · #22 08-30-2015, 08:23 AM

Here's what a whole house secondary surge protector looks like. They work great. I've never had anything blown up.

jstout66 · #23 08-30-2015, 08:46 AM

I'll look into it, but I don't think it was a surge that did this one in. Everything else in the house was fine.

zeno · #24 08-30-2015, 10:16 AM

Looks like maybe just a rectifier or cap burned or just the
board. Dont give up yet !

73 Zeno

andy · #25 08-30-2015, 10:17 AM

...

jstout66 · #26 08-30-2015, 11:23 AM

No fishy smell... but boy, the other side of that board is charred and smells like a house fire.

jstout66 · #27 08-30-2015, 02:05 PM

Here's the burnt board

andy · #28 08-31-2015, 10:52 AM

...

jstout66 · #29 08-31-2015, 05:48 PM

ya... I haven't found a board yet, so this one probably has a date with the dumpster sometime this week.

Findm-Keepm · #30 08-31-2015, 06:35 PM

Panasonic sold complete SMPS, as consumables. There may be a dealer or distributor out there with residual stock. I'll check my stuff, I can remember a Panny monitor I got from Portsmouth public schools in an auction - I may still have the chassis (CRT had a bad phosphor burn) from one I junked.

Cheers,