Li Shin Int'l LSE9901B1250

[donatdonlo]

I have a Mag Innovision monitor that has the external AC adapter mentioned in the title which has gone bad. Is there any way to repair this or should I just purchase a replacement?

[smason]

Re: Li Shin Int'l LSE9901B1250

It might be as simple as bad caps, many are. Have you cracked it open?

[donatdonlo]

Re: Li Shin Int'l LSE9901B1250

That was my next question. How easy is it to open one of these up?

[donatdonlo]

Re: Li Shin Int'l LSE9901B1250

I managed to crack it open, and all the Caps look good visually, and shockingly are Rubycon.

[tom66]

Re: Li Shin Int'l LSE9901B1250

Definitely not "Rulycon"? What is the output voltage...?

[donatdonlo]

Re: Li Shin Int'l LSE9901B1250

12v DC, 4.16 Amp, 50W are the specs. I'm not sure I can find a safe way to plug it in and test while it's our of the shell.

[budm]

Re: Li Shin Int'l LSE9901B1250

Did you try heating it up with hair dryer to see if it will put out any DC after warm up? Especially the small startup cap (22~47uf 50v) in the primary side. You will not see any bad sign on the small cap.

[donatdonlo]

Re: Li Shin Int'l LSE9901B1250

I'll try tomorrow and let you know how it works out.

[Rtech]

Re: Li Shin Int'l LSE9901B1250

I assume you have checked the output cable for continuity, as these can go both open and short circuit with use,and a short will ensure you measure no output ??

[budm]

Re: Li Shin Int'l LSE9901B1250

Good point Rtech, it may also have ZENER Diode (15~16V) across the output to act as crowbar protection