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Title: Gaplus PCB issues Post by: JakeTheMuSS on October 22, 2013, 11:22:34 pm Hey John,
Love the videos mate! I'm just getting into the whole fixing PCB's. I have a Cocktail Gaplus and nothing was coming from the screen. So I got recommended to clean the pcb board. So I have take the chips out and some of the legs have fallen off, they were so frail and dirty. Was mainly the MB7052(Had GP2-1 label) chips and also one J349X(No Label). Do i need to buy new proms and program them? How do I work out what to program Can recommend a programmer/duplicate device? Cheers, Jake Title: Re: Gaplus PCB issues Post by: lordkahless214 on October 23, 2013, 01:36:47 pm I know this is kinda aimed directly at John, but maybe I can help a little...
Welcome to namco custom leg rot syndrome, the J349X is a custom security chip and can be a beast to find because there are no drop in replacements. Your best bet is finding another namco board with the chip to take parts from or asking on KLOV (if you are a member there) unless you can repair the chip legs by soldering on new ones, this can be done sometimes depending on how the legs have broken. For the other chip it happens to be a bi-polar prom this one can be replaced much easier than the other one, you just need someone to burn you a new one I have heard good things about http://www.hobbyroms.com/ and they can do that one easy. As for a eprom burner, I personally use a GQ-4X that you can get on ebay for about 100$, but it doesn't do certain chips, I know it won't do PAL/GAL chips or BI-Polar proms so If you intend to do lots of chips like those it won't be the programmer that you need. However, it is a good basic programmer and has done great for me on other chips though (for example: program roms, freeplay kits, bios chips), on the very rare occasion I need one of the chips my programmer doesn't support, I just order them pre programmed from people who can do them. Title: Re: Gaplus PCB issues Post by: JakeTheMuSS on October 24, 2013, 07:24:07 pm Awesome thanks for the reply...
Yeah so I managed to piggyback and solder the security chip, but a few of the bi-polar IC's are def un-repairable. Will check out that site. Thanks for the tip. Ok sweet will take a look at that programmer. Cheers for ur help. Jake Title: Re: Gaplus PCB issues Post by: lordkahless214 on October 25, 2013, 03:17:59 pm No thanks necessary :) I just hope you can get your game playing again
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