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**Reel Slots** Gaming Machines => Bally Reel Games => Topic started by: Gilligher on July 12, 2023, 04:56:23 PM

Title: Bally E series battery replacement
Post by: Gilligher on July 12, 2023, 04:56:23 PM

I have this e series bally 7s machine that I just got and from doing some research on here ive read that I need to get this battery out before it causes some damage.  I have a couple questions before I start.  What series board do I have?  What is the best way to remove the battery?  Clip the leads on the battery or unsolder from the back? Do I need to put a battery back in.  I was told by the previous owner that the battery only keeps accounting info.  Is this the right chip to clear errors?  And finally if I do get errors what chip do I pull out and put the zero clear chip in?  Thanks for all the help
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Title: Re: Bally E series battery replacement
Post by: Paulus on July 12, 2023, 08:45:41 PM

cut the legs of the battery and later remove the rest

resistor R62 must be removed and put a schottky diode in the position next to CR5 for CR2032 Li battery

ram clear is inserted in place of P1 ROM and it will display a cycle of numbers

Title: Re: Bally E series battery replacement
Post by: Paulus on July 12, 2023, 08:51:03 PM

do you have a device with which to read the eprom content?

eeprom/eeprom reader?
arduino mega?

Title: Re: Bally E series battery replacement
Post by: Gilligher on July 13, 2023, 07:11:25 AM

No I dont have anything to read the eprom.  Is there someone on new life games that can do this for me?

Title: Re: Bally E series battery replacement
Post by: Paulus on July 13, 2023, 08:51:02 AM

are you familiar with arduino and hobby electronics?

you can build with an arduino mega and 30 wires an eprom reader and you can even write eeprom instead of eprom

Title: Re: Bally E series battery replacement
Post by: Gilligher on July 13, 2023, 08:59:43 AM

No Ive never done anything with arduino.  I wasnt told anything about replacing a resistor.  I was just told to take out the old battery put a new holder with leads in and  sold a battery and the chip.  Now im not sure what Im doing.  Thank goodness I didnt listen to their advice.

Title: Re: Bally E series battery replacement
Post by: Paulus on July 13, 2023, 09:33:41 AM

original is a nicd battery (3x1.2V) that is charged while running through the series resistance but that can drain over time

the version proposed by me involves replacing it with a Li battery with a socket that does not require recharging, that's why the diode is placed and resistance removed

there is also the option of removing the battery and not putting anything in because the memory was only used for casino statistics