Author Topic: Hitachi Mainboard Replacement -- numbers not exactly the same  (Read 3370 times)

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Offline mathsquid

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Hitachi Mainboard Replacement -- numbers not exactly the same
« on: August 14, 2014, 08:03:46 pm »
I'm trying to repair a Hitachi LCD television.  It's an ultravision, model number L42S504.  I followed the troubleshooting procedure in the service manual, and it says to replace the mainboard.  I made some attempts to repair the mainboard, but was unsuccessful.

The power supply board seems to work fine, and if I use a jumper to put 5v to the PS_ON pin, the backlight turns on and I can get 12v and 24v from the power supply.

So I decide to replace the mainboard, which has model number 715G3269-M01-003-005K.  Here are two pics of the dead board in my TV.






When I look up this number on ebay, I no matches.  However, if I just search for 715G3269, I get several matches like that look like the right board, but the number on them is 715G3269-1.  For example, http://www.ebay.com/itm/INSIGNIA-or-HITACHI-MAIN-BOARD-715G3269-1-/301275415503?pt=US_TV_Boards_Parts_Components&hash=item46256a03cf

I don't know much about board naming conventions--I don't know if this board on ebay, the 715G3269-1, is a new revision that will work fine or if it won't work.  Do you guys have any advice?

Thanks.

M.S.

Offline KJDS

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Re: Hitachi Mainboard Replacement -- numbers not exactly the same
« Reply #1 on: August 14, 2014, 08:54:21 pm »
At that price I'd take the gamble. What can possibly go wrong?

Online Monkeh

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Re: Hitachi Mainboard Replacement -- numbers not exactly the same
« Reply #2 on: August 14, 2014, 09:11:25 pm »
At that price I'd take the gamble. What can possibly go wrong?

 

Online wraper

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Re: Hitachi Mainboard Replacement -- numbers not exactly the same
« Reply #3 on: August 14, 2014, 09:49:00 pm »
Same board, maybe minor differences like languages, revision, mfg site. Likely TV will become a different model with some features enabled/disabled. That part number actually is used in many models. Would be useful to find how to enter service menu to change settings to the right/similar model.
Edit:
Actually I can see differences in voltage regulators, but IMO should be compatible.
« Last Edit: August 14, 2014, 09:52:19 pm by wraper »
 

Offline ijchan223

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Re: Hitachi Mainboard Replacement -- numbers not exactly the same
« Reply #4 on: August 24, 2014, 08:05:16 pm »
typically if the connectors are the same it will be a direct drop in.
 


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