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Author Topic: Sigma SG-50B says "ram wrong"  (Read 13202 times)
pinballfixer2
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« on: March 19, 2009, 10:00:41 AM »
I have a customers machine that comes up with the message "ram wrong". The battery was dead and lightly corroded. I replaced the battery and cleaned the corrosion, but still the same message. Is there a clear RAM procedure on this? Any Ideas greatly apprieciated.
By the way, I am a new member, looks like a great site!!!
Tom
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blueridgeslots
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« Reply #1 on: March 19, 2009, 10:51:16 AM »
Turn the Jackpot reset key on the side one time
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Jim
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« Reply #2 on: March 19, 2009, 12:00:39 PM »
Welcome  to NLG  Tom

If the switches are not marked, there are three key switches. the front one is the reset switch. the second one is the meters switch,  the third one is the last games played switch.


Hope this helps

Jim
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MIDWEST SLOTS   Selling Quality Slot Machines since 1995.  We service and repair all types of slot machines. Mills, Jennings, Bally EM, 1000/2000 series, Proslot, 6000. IGT  M, M+ ,S,  S+, S-2000,  I-Game,  Universal,  Video Poker, Sigma.
pinballfixer2
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« Reply #3 on: March 19, 2009, 05:22:19 PM »
Then I assume by changing the battery, there is no other chip or anything needed (like the ballys), and game should work ok after reset. It is a little bit of a drive back there, so I just want to make sure of all the possibilities.  Thanks alot for the help. My specialty is pinballs any help I can be in return, glad to help.
Tom
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Jim
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« Reply #4 on: March 19, 2009, 05:49:07 PM »
Tom      there's no guarantee that there are no other problems, but you won't know until you reset that error and see what happens. Under normal conditions it should take care of it.

As for the battery, its been a while since I came across a Sigma-50, I remember that there were two types of batteries a weird looking square black battery , and a long drain type of capacitor.   even with good batteries, after the machine has been off awhile it still would put up the "rams wrong" error.
so show your client that if it happens  again what they could do to fix it themselves .

Jim
« Last Edit: March 19, 2009, 06:23:08 PM by Jim » Logged
MIDWEST SLOTS   Selling Quality Slot Machines since 1995.  We service and repair all types of slot machines. Mills, Jennings, Bally EM, 1000/2000 series, Proslot, 6000. IGT  M, M+ ,S,  S+, S-2000,  I-Game,  Universal,  Video Poker, Sigma.
nor9876
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« Reply #5 on: May 13, 2012, 01:16:58 PM »
hey guys i have a question about these old sigma as well...i have about 4 of them with this same problem.the drain capacitors are no good...and were im at i cannot buy them can any other battry works or can i  by pass this error.everytime the machines looses power this error come up
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Mr. Dinoman
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« Reply #6 on: May 13, 2012, 05:10:07 PM »
This might be what your looking for...It is the C1 cap...

http://parts.digikey.com/1/parts/90435-cap-super-1f-5-5v-radial-db-5r5d105t.html
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nor9876
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« Reply #7 on: May 13, 2012, 06:54:41 PM »
can any other type of battery be used?
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Mr. Dinoman
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« Reply #8 on: May 13, 2012, 11:17:33 PM »
It is not a battery...It is a capacitor of 1F and has a very slow discharge rate at 5.5v...I would not attempt to use a battery there...Have you tried leaving your machine on for a few days and let the cap charge to full?...IF so, does the machine give you the error right after charging and turning the power off then back on...If so, the cap is bad...
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« Reply #9 on: May 14, 2012, 09:15:09 AM »
Quote from: Mr. Dinoman on May 13, 2012, 11:17:33 PM
It is not a battery...It is a capacitor of 1F and has a very slow discharge rate at 5.5v...I would not attempt to use a battery there...Have you tried leaving your machine on for a few days and let the cap charge to full?...IF so, does the machine give you the error right after charging and turning the power off then back on...If so, the cap is bad...
Agree with Post
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nor9876
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« Reply #10 on: May 16, 2012, 05:35:54 AM »
no the error comes up after the machine is off  like over night
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Mr. Dinoman
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« Reply #11 on: May 16, 2012, 01:22:21 PM »
Replace the cap as noted in the above post...
Jimmy
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nor9876
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« Reply #12 on: May 16, 2012, 05:54:15 PM »
ok...thanks guys..i also having problem with the display or the power for the board...the display keeps turning off
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FORDSBS
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« Reply #13 on: May 16, 2012, 05:56:22 PM »
Quote from: nor9876 on May 16, 2012, 05:54:15 PM
ok...thanks guys..i also having problem with the display or the power for the board...the display keeps turning off

Sounds like power supply
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druby
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« Reply #14 on: May 17, 2012, 11:36:35 PM »
I rebuilt the power supply on my sigma 32 and rams wrong came up on the display. I reset the machine with the key and now the display is blank. any suggestions?
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