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Author Topic: I-game u74 chips  (Read 1012 times)

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Offline Ollisdadda

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I-game u74 chips
« on: March 24, 2017, 08:48:25 PM »
Does anyone know a source for the u74 surface mount chips. I have 4 boards that are bad and I'd love to fix them as spares. I can't find them anywhere. Any help would be appreciated. Thanks in advance.
Cheers, Alex

Offline Retro tech repair

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Re: I-game u74 chips
« Reply #1 on: March 24, 2017, 09:21:26 PM »
first you should tell people what type of board you have. second there is a lot of chips on these boards that are now obsolete and not available, there are also a lot of chips on these boards that have custom programing on them and a new replacement wont work. for my board repairs i usually pull the parts off junk boards.

Offline Ollisdadda

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Re: I-game u74 chips
« Reply #2 on: March 24, 2017, 09:31:56 PM »
Its a 3902 board. Sorry I spaced it. Its the buffer chip. Not sure of the programming but I'm sure it has something on it. Thanks.
Cheers, Alex

Offline Retro tech repair

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Re: I-game u74 chips
« Reply #3 on: March 24, 2017, 09:52:22 PM »
OK that's what i thought its a 74C240 it does not have any special programing its just a standard 74 series logic chip. this is one of the chips i pull off junk boards tho so im not sure where to get them.

Offline Ollisdadda

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Re: I-game u74 chips
« Reply #4 on: March 24, 2017, 09:54:48 PM »
Thank you very much! If there is no programming on it I'll try and track them down. That simplifies things immensely!  :thank_you:
Cheers, Alex

Offline Ollisdadda

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Re: I-game u74 chips
« Reply #5 on: March 24, 2017, 10:28:09 PM »
Just in case anyone else needs these, I found on them on eBay for about $2 out of China. Thanks again vtyler!
Cheers, Alex

 

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