Panasonic Burned Up!

[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.

[zeno]

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]

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]

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]

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]

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]

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

[jstout66]

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]

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

73 Zeno

[andy]

...

[jstout66]

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

[andy]

...

[jstout66]

Here's the burnt board

[cpt.shotwell]

Originally Posted by jstout66

Here's the burnt board

so last night while researching this issue i came across this thread. i've got two of these models, the Panasonic AG-550 with the same issue on the power supply as you, fried in the same spot! one is burnt all the way through and the other just had the components in that spot crack and fall off. 6 odd years later i don't really expect you to remember, but wondering if decided to fix it or found any sort of replacement? shame to junk it when the rest of the unit was working fine before the power supply failed

[jstout66]

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