Sanyo 40" LCD TV BA5G27G0201 1

[repair-it]

I was just wondering if anyone has any knowledge of common failures in this board? So far, I have found blown fuse and a shorted diode. TV would not power up. It seems that replacement boards are scarce which makes me wonder if there was a common failure. I'm new here, just thought I'd ask.

rich

[dick_barton]

Re: Sanyo 40" LCD TV BA5G27G0201 1

What is the number on the mosfet marked. Can you post a photo of the underside of the board.

[repair-it]

Re: Sanyo 40" LCD TV BA5G27G0201 1

Thank you for your reply. The number on that mosfet is: TK10P60W

pic attached

[dick_barton]

Re: Sanyo 40" LCD TV BA5G27G0201 1

With the set powered off you need to check that there is no short circuit between any of the 3 pins.
I see that one of the diodes is missing D65xx and another needs to have it's solder joint redone.

[repair-it]

Re: Sanyo 40" LCD TV BA5G27G0201 1

Thanks for the observations. One diode has been removed as it is shorted and I have also since removed the fuse, waiting on both to arrive within a few weeks.

Another diode nearby had been removed & replaced for testing. Everything else seems to check out, I'll know for sure once I get the replacement components in and test. From what I've experienced with these boards, they tend to blow a diode or two. I was just wondering if anyone had a similar experience or found other faults that seem to be common on these type of boards.

It would be easier to replace the board for $70 but I'd would rather repair it for $10 in parts and an hr of labor when possible. Once I have this repaired, I'll post the results.

[repair-it]

Re: Sanyo 40" LCD TV BA5G27G0201 1

Dick,


You were spot on. Mosfet shorted, other than a blown fuse and shorted diode, everything else seems to be in order. Fuse had to be ordered from China, waiting.

Thanks again for bringing that to my attention. ��

[dick_barton]

Re: Sanyo 40" LCD TV BA5G27G0201 1

Hopefully you have resolved the problem. I would just tidy up any solder joints that look like they need it while waiting for the parts to arrive.

[dick_barton]

Re: Sanyo 40" LCD TV BA5G27G0201 1

Just had a thought. If the Mosfet was short and not open circuited then there may be a low ohmage (0.3 - 0.5 ohm) resistor in the source line that may have gone open. Also the components connected to the gate of the Mosfet would need to be checked to ensure that any high voltage at the Drain did not feed back to the driving IC and damage it.

[repair-it]

Re: Sanyo 40" LCD TV BA5G27G0201 1 UPDATE!

I was able to resolve the issues(s) and TV is working again....well sort of. Seems the owner forgot to tell me the TV apparently got dropped. When I powered it up I saw that the screen is shot, cracked at both bottom corners, lines across the lower 2 inches. Now I am trying to locate a used unit to salvage the screen, for the right price of course. Not a very popular TV or everyone is hanging on to that one.

Anyway, It was suggested by a member of the electronics repair school group on discord to purchase a repair kit for this particular TV. FUNAI L40ME325V-F7A POWER SUPPLY BA5G27G0201 1 REPAIR KIT. Unfortunately I had already order multiples of the needed components because I did not know the kit existed - I could have saved at least half of what I spent in time & money.

The components I had replaced matched what comes with the kit, so I was happy to see I had hopefully diagnosed it correctly... and I did. It just sucks to have gone all through that to find out the screen was damaged.

[nomoresonys]

Re: Sanyo 40" LCD TV BA5G27G0201 1

That sucks that it was broken, I have an old sanyo from 2010, ccfl, very bright and clear and very good blacks imo. Beats my sammy edge lit led hands down no contest.