Re: TNPA4250 Board Repair
...follow these signals to the control board.
Maybe they are switched of because of the sos signal.
On other TV s ,this signal source keeps working unless control board is bad...
hennes
New Member
Last Activity: 01-31-2016, 03:40 AM
Joined: 03-02-2015
Location: heidelberg
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Re: TNPA4250 Board Repair
...your Hin Lin looks like open loop.
You have good connection to the control board ??Leave a comment:
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Re: TNPA4250 Board Repair
Anyway,I'd found some data. 2n2307 is simlar to stp9nk50z....Leave a comment:
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Re: TNPA4250 Board Repair
check the driver of the replaced mosfet.
In the repair kid you can buy on ebay there are some smd resistors etc. included.
So that may be worth to check .If TV runs you can use your Oszi for G signal and make a cross check....
I would come from this side to the problem. But don't run your TV to long with your ''pass by'' circuit....Leave a comment:
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Re: TNPA4250 Board Repair
Hi,
have the same model,
and by using manual from E-tanya and this threat found one of the 5N... mosfets was short.
Replaced it by a IRFP 4229.
For that measuring,i just opened the drain connection of each mosfet from the shortened cluster carefully and made diode-test.
The bad one only had 8mV between S and D.
The other parts of that group vary about up to 4mV.
Maybe that's reason that some of them die....
I was lucky to check and repair this with all boards...Leave a comment:
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