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**Reel Slots** Gaming Machines => Bally Reel Games. => Topic started by: nsmith2901 on June 14, 2013, 09:33:50 PM



Title: bally s5500 problems with safe ram clear
Post by: nsmith2901 on June 14, 2013, 09:33:50 PM
I purchased a new set of mains u3,u4,u12,u15.  i tried to do a safe ram clear but got no error code.  are there different types of mains and maybe i purchased the wrong type?
when i used my original u3,u4 i got a successful clear.  my old u12,u15 are corrupted and thats why i got a new set of mains.
nsmith


Title: Re: bally s5500 problems with safe ram clear
Post by: MarkInAz on June 21, 2013, 08:22:58 PM
I'll through in my 2-cents here and suggest you contact whom you purchased the new mains from and see what they can tell you.

Good luck.


Title: Re: bally s5500 problems with safe ram clear
Post by: nsmith2901 on June 22, 2013, 04:12:09 PM
i think i know the reason that the new mains don't work.   i found out that the speed of the eproms must match
the board speed.  i think i bought eproms that were too fast for my board.  i sent my board to be fixed to a friend
i know that has older eproms for mains.


Title: Re: bally s5500 problems with safe ram clear
Post by: MarkInAz on June 22, 2013, 04:30:32 PM
 In my experience with the speed of a Eprom memory chips faster is not a problem, slower on the other hand can cause issues.  Hopefully your friend will make some progress.  If it was me I'd read out the check sum of the old & new chips and compair them for starters.  But as for your original question about versions of mains I don't know.  Maybe someone else here on NLG can answer that one.  You could start a new thread asking specifically about that.

Good luck,

Mark