Baytown, TX
Hello all,
Can i use the system 11 mpu from a Grand Lizard to replace the system 11c that the Rollergames came with?
(Topic ID: 260096)
Linked Games
Grand Lizard
Williams, 1986-
Rollergames
Williams, 1990
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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.
Read https://www.pinwiki.com/wiki/index.php?title=Williams_System_9_-_11#MPU_Driver_Boards for more information.
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.
Quoted from TxDremz:mem protec failure
Start with posting a picture. If there is no or minor battery corrosion, then board is repairable.
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
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.
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.
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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