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Big Guns - Williams System 11 - random lock ups
- Thread starter Andy B
- Start date
Thanks @Ruaraidh Yep I need a #A-10821 by the looks of it as in your picture, just did an order on Monday from Marco too 
. Do you have one could buy of you by any chance with the screws or do you know the screw type ?
www.marcospecialties.com
. Do you have one could buy of you by any chance with the screws or do you know the screw type ?A-10821 - Flipper coil stop for 1987 Williams F-14 TOMCAT, SPACE STATION, FIRE!, BIG...
<p> Flipper coil stop for 1987 Williams and other pinball machines. Core height from bracket face is 6.3 mm. </p> <p> Overall length of bracket is 1-1/4in, overall width of bracket is 1-7/16in, overall depth of bracket is 3/4in, distance from screw hole to hole measures 7/8in, and core length...
www.marcospecialties.com
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Yes. Tried that Phil. The black marks on the connectors were already there so not my doing. Same result I’m afraid - issue never went away despite board being disconnected.
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I might have one Phil though not sure if it was WMS or Data East - will have a look later today.Thanks @Ruaraidh Yep I need a #A-10821 by the looks of it as in your picture, just did an order on Monday from Marco too
A-10821 - Flipper coil stop for 1987 Williams F-14 TOMCAT, SPACE STATION, FIRE!, BIG...
<p> Flipper coil stop for 1987 Williams and other pinball machines. Core height from bracket face is 6.3 mm. </p> <p> Overall length of bracket is 1-1/4in, overall width of bracket is 1-7/16in, overall depth of bracket is 3/4in, distance from screw hole to hole measures 7/8in, and core length...
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Also, I see in a previous post in the thread I note that I replaced all flipper coil diodes. I can’t believe I would have missed that end stop being missing - even my eyesight is not that bad!
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I was right, I do have an end stop in my toolbox Phil. I think it’s Stern as there’s a brand new Stern coil in the box with it (Lord knows where I picked them up from!) but looks like the one in the earlier photo.
I’ll stick it in the post for you today.
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Does anyone know or had experience of the System 11 6802/08 CPUs crashing after the machine has been on for a while or maybe the Ram chips. I would of thought Ram failure would be more possible.
I can`t get my head around that sometimes the displays garble then clear on the next game as though the data in the Ram is being corrupted then cleared for a new game if this is how it works, the NVram does lose the settings sometimes.
The CPUs came from the old acid damaged board of course.
I am trying to carry on from @Andy B but im find I am going over what has already been checked.
I have my High Speed but I not keen on putting the Rotten Dog in there to test
The only option I can see is to get a MPU from @dumbass on Pinside he sells new built replacements but they are $600
I can`t get my head around that sometimes the displays garble then clear on the next game as though the data in the Ram is being corrupted then cleared for a new game if this is how it works, the NVram does lose the settings sometimes.
The CPUs came from the old acid damaged board of course.
I am trying to carry on from @Andy B but im find I am going over what has already been checked.
I have my High Speed but I not keen on putting the Rotten Dog in there to test
The only option I can see is to get a MPU from @dumbass on Pinside he sells new built replacements but they are $600
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His boards are top notch though... Just get a board, order the parts and build it yourselfDoes anyone know or had experience of the System 11 6802/08 CPUs crashing after the machine has been on for a while or maybe the Ram chips. I would of thought Ram failure would be more possible.
I can`t get my head around that sometimes the displays garble then clear on the next game as though the data in the Ram is being corrupted then cleared for a new game if this is how it works, the NVram does lose the settings sometimes.
The CPUs came from the old acid damaged board of course.
I am trying to carry on from @Andy B but im find I am going over what has already been checked.
I have my High Speed but I not keen on putting the Rotten Dog in there to test
The only option I can see it to get a MPU from @dumbass on Pinside he sells new new built replacements but they are $600
My thoughts are that this is a faulty rottendog mpu board. only way you will know if by swapping it out for a different mpu.
Yep @Andy B had already fitted it along with a RD PSU. I believe the only items you add is the ROMS & The CPUs.
His boards are top notch though... Just get a board, order the parts and build it yourself
Yep I think I might go along with that and order 1 in the meantime, the board is $100 I'm not afraid of building it as long as the parts are obtainable in the UK easily enough. I'm thinking I could try some different CPUs and NVRAM in the RD as I could use the NVRam at least on one of my other pins.
The CPUs look cheap enough
MC6808P Integrated Circuit - CASE: DIP40 MAKE: Motorola | eBay
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I didnt swap any chips over from old board in to new one Phil. Paid extra for the board with new processor and roms included.
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Thanks @Andy B that saves me messing with those . Did you ever ask the Pinball Palace for any help/info though its not like a normal purchase of course where you would expect support.
w8 and w9 is a head scratcher seems to be to select system 9 or 11 but every board I have seen images has 2 resistors with 1 to remove.
. Did you ever ask the Pinball Palace for any help/info though its not like a normal purchase of course where you would expect support.w8 and w9 is a head scratcher seems to be to select system 9 or 11 but every board I have seen images has 2 resistors with 1 to remove.
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No, I didn’t contact Sean other than to return the Banzai Run roms he had installed in the board by mistake when I got itThanks @Andy B that saves me messing with those
w8 and w9 is a head scratcher seems to be to select system 9 or 11 but every board I have seen images has 2 resistors with 1 to remove.
I'd take the rottondog board out and give it a really good inspection. If nothing obvious, send it off to someone for a professional diagnosis and repair.
