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Author Topic: I+ 044: EPROM SYNCHRONIZATION ERROR  (Read 5955 times)
Worldwide Gaming
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« on: July 20, 2011, 01:55:30 PM »
I've got a number of IGT I+ 044 machines that have decided, en masse, to start throwing the error: EPROM SYNCHRONIZATION ERROR - which then tosses you into a continuous loop of attendant key turns and test button presses...   Scratch Head

Clear chipping doesn't work, pulling the battery doesn't work, swapping mainboards doesn't work.   Silly Me!

Has anyone ever run into this before and what's the fix?

Thanks in advance!
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stayouttadabunker
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« Reply #1 on: July 20, 2011, 03:44:20 PM »
Sounds like the chips are in the wrong sockets?  Scratch Head 3
Have the chips been moved recently?
I'd check the chip locations against a known working machine...
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Slotmaster
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« Reply #2 on: July 20, 2011, 03:57:26 PM »
I think this issue is backplane related and not main board or flash.

The backplane has an EEPROM as well and keeps some data which I think is the error you are getting.  I could be wrong here but try another backplane.
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« Reply #3 on: July 20, 2011, 04:17:33 PM »
Quote from: Slotmaster on July 20, 2011, 03:57:26 PM
I think this issue is backplane related and not main board or flash.

The backplane has an EEPROM as well and keeps some data which I think is the error you are getting.  I could be wrong here but try another backplane.



Good point...and I would check to see that the E4 chip (I think that is what it is called) is installed on the back planes...this is the small 6 or 8 pin chip.
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« Reply #4 on: July 20, 2011, 04:41:37 PM »
Quote from: Bettor Slots on July 20, 2011, 04:17:33 PM
Quote from: Slotmaster on July 20, 2011, 03:57:26 PM
I think this issue is backplane related and not main board or flash.

The backplane has an EEPROM as well and keeps some data which I think is the error you are getting.  I could be wrong here but try another backplane.



Good point...and I would check to see that the E4 chip (I think that is what it is called) is installed on the back planes...this is the small 6 or 8 pin chip.
It's an 8 PIN Serial EPROM, most are in a socket some are not, I have seen both types.
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stayouttadabunker
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« Reply #5 on: July 20, 2011, 04:44:27 PM »
What is labelled/stenciled/imprinted onto the i-game backplane serial eprom chip?
If they are the same as S+ motherboard 24C04 8-pin chips - I may have some brand new blank spares available...
« Last Edit: July 20, 2011, 05:05:17 PM by stayouttadabunker » Logged
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« Reply #6 on: July 20, 2011, 05:09:05 PM »
Quote from: stayouttadabunker on July 20, 2011, 04:44:27 PM
What is labelled/stenciled/imprinted onto that serial eprom chip?
If they are the same as S+ motherboard 24C04 8-pin chips - I may have some brand new blank spares available...

Bunker,

They are different... I believe that they are 24C256 chips. I will check my spare chips for an exact part number if my mind was wrong!  Crazy

CH CaptainHappy
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stayouttadabunker
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« Reply #7 on: July 20, 2011, 05:49:28 PM »
Ah Oui ! Having larger chips would make more sense as the i-games have more crap to remember!  rotflmao
 
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« Reply #8 on: July 20, 2011, 06:28:56 PM »
Quote from: CaptainHappy on July 20, 2011, 05:09:05 PM
Quote from: stayouttadabunker on July 20, 2011, 04:44:27 PM
What is labelled/stenciled/imprinted onto that serial eprom chip?
If they are the same as S+ motherboard 24C04 8-pin chips - I may have some brand new blank spares available...

Bunker,

They are different... I believe that they are 24C256 chips. I will check my spare chips for an exact part number if my mind was wrong!  Crazy

CH CaptainHappy
Quote from: stayouttadabunker on July 20, 2011, 05:49:28 PM
Ah Oui ! Having larger chips would make more sense as the i-games have more crap to remember!  rotflmao
 

OK, for the record here for future readers:

Standard i-Games on 3902 use 24C16 8pin DIP 16K Serial E-squared EEPROM, sample part number M24C16

Standard i-Games on 044 use 24C256 8pin DIP 256K Serial E-squared EEPROM, sample part number AT24C256B-PU (Be careful here as the Atmel chip is actually labelled ATMLU018 Silly Me! )

CaptainHappy CaptainHappy

P.S. I think that the E2 size issue deals more with what chip was available in production at the time of the design than the amount of data, but I am sure that it is more data too.
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« Reply #9 on: July 21, 2011, 12:16:01 AM »
Excellent information on the i-game backplane chip Capt! yes
Thanks for looking that up for the i-games guys!  applause
Even though it is known that you have the "magic powers" -  Dragon
I gave you a plus + karma!  Tongue Out
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