Re: Polaroid FLM-3732 Power On/Off

I've replaced all but one of the caps with United Chemicon LXY series. For the other one, we only had Illinois Capacitor RZS series in the correct size. The RZS series is low ESR, and intended for use in switching power supplies, per their website [URL="http://www.illinoiscapacitor.com/pdf/seriesDocuments/RZS%20series.pdf"]here[/URL].

Unfortunately, the same symptom still exists.

An engineer that I work with suggested that if a switching FET is heating up, it's likely because the gate voltage is too low,...

Re: Polaroid FLM-3732 Power On/Off

Hey Kevin,

You know, the low ESR thing crossed my mind, but I was under the impression that a cap with too high of an ESR would only cause it to heat excessively, thus shortening its lifespan. I wouldn't have thought that it would cause the supply to malfunction immediately. However, I've been known to be wrong (more frequently than I'd like to admit). I'll see if I can get my hands on some better caps. Maybe it really is that simple. Thanks for the feedback!

Troy

Re: Polaroid FLM-3732 Power On/Off

Here is a pic showing the specific components that I tried to describe above....

Hello all,

My TV has failed, and I'm hoping that you good folks could offer some advice.

Here's the skinny:
The TV is a Polaroid FLM-3732 that I bought new 6 years ago or so. It never had any problem at all prior to this failure.

The symptom: One evening after a couple hours of constant operation, it turned off. No standby LED at all. Disconnecting from AC power for 10 seconds or so, then reconnecting would get the standby LED back on, but pressing the power button would only result in a momentary change of the LED from red to blue, then it...

Re: New Members - please post your introductions here

Hi all,

I just joined up, and wanted to say hello. I'm a engineering R&D tech working for a mid-sized electronics company. I have over 10 years experience in component-level troubleshooting and repair, as well as design verification. But like anyone, I frequently run across things that absolutely baffle me. I look forward to contributing where possible, and gaining insight and knowledge from you good folks.

Thank you all in advance!