Panasonic DVD Recorder model DMR-ES20 Problem

Help.... But, Don't Help!

Cap testing is not an exact science. Cap testing in-circuit is even less so.

It will be, (at least) one of these three:

... a failed diode in the starting circuit. If there are any zeners, go there. ... a failed cap - not holding a charge, so it does not tell the circuit that it is 'ready'. ... if there are any relays involved, go there.

Otherwise, there are special places in the nether regions for your sort.

Peter Wieck Melrose Park, PA

On Thursday, November 15, 2018 at 7:48:00 AM UTC-5, snipped-for-privacy@verizon.net wr ote:

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Ich have an DMR-E30 with a problem very equal to your problem. It goes on, does absolutly nothing, if I press the off-button for

I know that the powersupply is working. The maincontroller can write "BYE" to the VFD so I know the controller is working. But when I close the testjumper it did not show any error-value. So my guess is that it is a problem with the firmware in the flashmemory and I guess you have the same problem.

Olaf

p.s: I am graduate engineer and professional hardware developer and I have the repair manual. But this time I think I have to give up. It is a shame, because this old recorder is a masterpiece!

How? If you're going on that it's outputting voltage, that only proves the power supply is not dead, but that's not enough. I've seen these sag and r ecover so quickly that you won't see it on a DMM. I repaired several of the se Panasonic recorders with a cranky smps or buck converters that refused t o complete the boot.

Please do not make suggestions, as you are already an expert apparently. Yet you can't fix it without knowing EXACTLY what someone else did to fix it.

Pompous ass.

There are dozens of us here with many MORE years of troubleshooting experience. Myself included. However, I'm sure as hell not going to help you, as that seems to be exactly what you want.

You posted about this a long time ago. Still not fixed? I see your years of experience have yet to pay off.

But I think I would see it with my 200Mhz HMO2022. .-)

I agree, if someone would told me anything like this my first thought would be the power supply, too. But I checked it VERY carefully.

But sometimes, only sometimes it is not the power supply...

Olaf

You asked about this back in July, got a bunch of answers. I can't remember if you ever posted again in that thread, but if ever there was a time to resurrect a thread, it is when you started it and have a followup.

I think you got decent answers back then, yet you post like you've never been here before. And the people most likely to announce their capability are often the ones who aren't, they just assume they'll get a better answer if they claim to be a "service tech" or some "authority".

Your post suggests otherwise, and you don't seem that capable if you insist on replies only from people who have experienced the exact same thing.

Go back and read the previous thread, maybe there is some help there.

Michael

As long as you don't run it faster than 10ms or so. Lots of techs get fool ed by a quick glitch that doesn't disturb their DMM's update count. On ana log circuits you may not notice it, but in digital I've seen this cause an endless system reset cycle. Wondering if OP understands that..

Hi Michael,

Here is one of the replies I received in that previous post from a "Lee":

"Yes. Bad capacitor. Replacing it fixed it"

I asked "Lee" which capacitor? He NEVER responded.

John .

John:

Consider the analogy of the shotgun. The reply you received was perfectly valid. Your response and expectation was not.

Peter Wieck Melrose Park, PA

On Friday, November 16, 2018 at 7:33:13 AM UTC-5, snipped-for-privacy@verizon.net wrot e:

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He may not have made note of the cap. I don't make notes unless the proble m was something that took a lot of time or was really non intuitive (like a 100K leakage on one of the front panel switch contacts - yep, had one of t hose recently)

And you assume that *your* recorder has the same bad part as Lee or someone else had the exact problem as you? It might, but it doesn't have to be n ecessarily. What if he told you the location and that didn't fix it? What then? I've seen several problems in these Panasonics cause the constant 0

I already told you that the constant 0000000 on ac plug-in means incomplete software loading or corrupt software. If the software isn't corrupted (I haven't seen a Panny do this), then you have to figure out why it's not fin ishing the boot. You're an experienced tech and the manual is on line. Wha t more do you need? It's not like it's intermittent.

BTW, you can buy a working example on ebay for like $60 U.S.