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Equipment Repairs => LCD TV forum => Topic started by: nifty1a on January 01, 2009,09:51:55

Title: Maxim 1157 PSU fault 04TA069I
Post by: nifty1a on January 01, 2009,09:51:55

I have a Maxim 1157 that died on me... On inspection, pin 8 of IC21 (FSD200) on the PSU board (04TA069I) has vapourised!
Has anyone seen this before? Any 'best way forward' for this fault? Is there a repair kit for this? What is the likely cause? Where should I start checking?
Does anyone have a known accurate schematic diagram? (I have one that is supposed to be the right one but not tried using it yet.)
Does anyone have any service notes/service manual for this model?
Will this PSU run standalone out of the chassis, or do I need to have it connected to the signal board?

Lots of questions I know, but hopefully someone will answer one or two of them...please  :ciao:

Thanks

PaulB

Title: Re: Maxim 1157 PSU fault 04TA069I
Post by: tv tony on January 02, 2009,06:48:44

hello, we offer a repair service on these units, in fact i posted one back yesterday, and yes,the fsd200 does fail a lot, private e mail if you wish, this psu is also fitted in the technosonic 3251 of which we are main dealers
hope this helps
tony walker
we also upgrade the psu to prevent them failing again

Title: Re: Maxim 1157 PSU fault 04TA069I
Post by: nifty1a on May 29, 2009,19:14:30

JUST TO UPDATE THIS FAULT.

I changed just the FSD200 on this PSU, and that didn't fix the fault.

I then had to put the TV to one side for a few months due to other commitments.

Two weeks ago I ordered the repair kit from Ohm. I replaced all the components from the kit, although all the caps and zeners I removed tested okay.

I have a feeling it was either IC30 or Q300 (in addition to IC21) that had died.

The TV now works fine!

So thanks to TV Tony, for his advice, I now have something to watch instead of my 42" Philips plasma that has died too, trying to sum up the effort to fix that next!