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(Topic ID: 260096)

Williams system 11 / system 11c compatibility


By TxDremz

10 months ago



Topic Stats

  • 11 posts
  • 6 Pinsiders participating
  • Latest reply 10 months ago by TxDremz
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#1 10 months ago

Hello all,
Can i use the system 11 mpu from a Grand Lizard to replace the system 11c that the Rollergames came with?

#2 10 months ago

Don't, 11s are rare and you'd have to do some work to it. Much better to go out and find an original C instead. Someone is dying for that system 11 board.

#3 10 months ago

Is your original system 11C board damaged or missing? If damaged, post a picture of it.

#5 10 months ago
Quoted from PinballManiac40:

Is your original system 11C board damaged or missing? If damaged, post a picture of it.

Honestly, i don't know if there is anything wrong with the 11c mpu. I have not played the Rollergames in quite a while. I turned it on the other day and all i got was the general illumination lights. No display and no "bong" sound on power up. When i press the button on the side of the mpu it will "bong" and briefly displays "mem protec failure". I am just barely getting into trouble shooting this one. All three red lights are continuously lit on the mpu. The reason that i was asking about possible sys 11 compatibility is that i have a "Grand Lizard" that had been retired years ago. The mpu is in it but i have no idea if it is any good. Someone got to the other boards before i got the machine.
The display is totally blank and appears to be dead until i press the button on the mpu (11c) thats when it displays the "mem protec failure" and then goes blank again.

#6 10 months ago
Quoted from TxDremz:

mem protec failure

Start with posting a picture. If there is no or minor battery corrosion, then board is repairable.

#7 10 months ago
Quoted from PinballManiac40:

Start with posting a picture. If there is no or minor battery corrosion, then board is repairable.

Here is a couple of pics. I have not removed the mpu but i don't see any obvious problems. I am going to be digging into this deeper tomorrow with a multi meter. What besides checking fuses should i be looking for first?
Thank you, by the way. Oh yeah, You might notice in the picture that the ribbon cable above the batteries is missing. I unplugged it for a better shot of the area around the batteries.
IMG_20200119_203917485 (resized).jpgIMG_20200119_203930087 (resized).jpg

#8 10 months ago

Thing is clean as a whistle as far as battery corrosion goes. The fix should be cheap and easy. If I were you, my bigger concern would be finding the other boards for the Grand Lizard.

#9 10 months ago
Quoted from TxDremz:

What besides checking fuses should i be looking for first?

The battery holder is bad and I would also replace C-30 while the board is out. Then put it back in and check voltages on the power supply.

#10 10 months ago

I could install NVRAM for you to keep that perfect MPU looking like that forever, which removes the batteries. I even have the C30 and night even have all capacitors on hand for a cap rebuild for that power supply. I live out close Katy. Also, Tim in Cosby of Crosby Pinball could also do it since he is less than half the distance than I am from you.

#11 10 months ago
Quoted from GRUMPY:

The battery holder is bad and I would also replace C-30 while the board is out. Then put it back in and check voltages on the power supply.

Thank you. I will replace the battery holder with an NVRAM as well as the C-30. I have both of them on hand.

Quoted from PinballManiac40:

I could install NVRAM for you to keep that perfect MPU looking like that forever, which removes the batteries. I even have the C30 and night even have all capacitors on hand for a cap rebuild for that power supply. I live out close Katy. Also, Tim in Cosby of Crosby Pinball could also do it since he is less than half the distance than I am from you.

Yeah, If this thing gives me too much grief i will be giving Tim a call.
I will update with my progress. Thank you!

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