- Panasonic AG1980P power supply problems - 3 Updates
- Schematic for Kamoden 360 TR multimeter - 1 Update
| captainvideo462009@gmail.com: Apr 08 01:22PM -0700 I have 4 of these that we still use here in the house. Last year we were operating on generator power after a storm, The generator started surging as it began to run out of gas and I later learned that three VCR's power supplies were wiped out I'm guessing from this. Luckily I had three junkers that were kind enough to donate power supplies and since the power supplies are separate plug in modules I was able to restore the three machines relatively easily. The other day we had a 10 second blackout with surging during restoration. After power came back on I noticed that one of my machines was again dead. I have the service manual however this power supply is a nightmare to get into whats more take apart and try to troubleshoot. I never had to deal with this after the first blackout when I just did organ transplants. The chassis is soldered together and the two boards connected with jumpers and then the entire mess was soldered together afterwards. For a commercial machine from a service stand point this is a piss poor design.It's not something I'm looking to rip apart. I was really hoping that perhaps someone who worked on these units back in the day may remember power surges causing any particular problems with these power supplies. That way maybe I can squeeze in there and get at just what I need to without having to remove a bunch of stuff in order to get to it. So now I have 4 bad power supplies that actually may all have the same problem and I'm not sure what I'm going to do. If anyone can please help me with this I would sincerely appreciate it. Thanks, Lenny |
| John-Del <ohger1s@gmail.com>: Apr 08 01:46PM -0700 > same problem and I'm not sure what I'm going to do. If anyone can > please help me with this I would sincerely appreciate it. Thanks, > Lenny They used to offer kits for these. They included the Mosfet/Transistor, driver, ref IC, a bunch of zeners, and all the capacitors in the primary and secondary. It's normally high ESR caps in the primary that wipe these out. As long as they're plugged in and warm they're happy, but if they lose power and go cold, they'll blow the mosfet as soon as power is restored. Email my brother and see if he has any supplies left for these. I know he got rid of a lot of stuff but you never know. If you find one somewhere, make sure you recap it before plugging it it. |
| Chuck <ch@dejanews.net>: Apr 09 11:20AM -0500 On Mon, 8 Apr 2019 13:22:09 -0700 (PDT), captainvideo462009@gmail.com wrote: >same problem and I'm not sure what I'm going to do. If anyone can >please help me with this I would sincerely appreciate it. Thanks, >Lenny Lenny, Once you recap these and replace the mosfet, please check the 18V zener to ground on the 15V line. Very likely that it will be shorted. Chuck |
| des2.bryington@gmail.com: Apr 08 12:20PM -0700 > Please help! > Thanks! > Deam Just come across your posting/s. Not sure if you have found a copy of schematic / manual. I do own a 360-TR and provided similar info to someone here in South Africa in 2016. Found my email with info so I can email copy to you if you wish. You can use my email address des.bryington@gmail.com Subject 360-TR. Best wishes |
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