JohnMc123
Member
I've been working on my Robotron for a while now. When I got this game it had some bigger fuses in the power supply board and one was wrapped with tinfoil. The game was dead when plugged in.
I have since replaced:
>a new 110 volt power cord and plug from the wall outlet to the machine;
>all electricity capacitors;
>all header pins with Molex pins;
>all .156 Molex KK Series Connector Housing and Molex .156 Trifurcon Pins Female 18-20 AWG;
> Williams D-8784 Mega Deluxe Power Supply Rebuild Kit;
>10K OHM Williams +5vdc Power Supply TRIMMER POTENTIOMETER (P1037);
>Williams 4164 RAM adapter;
>new 4164 RAM; and
>new dual wipe IC sockets for the new 4164. After desoldering 400 joints with a Soldapullt and wick, I snaped and bouught a Hakko FR300!
and also have but, haven't installed because, I was going to try and get the game up and running first:
>Wells Gardner K4900 Series Cap Kit;
>560uF 200V Nichicon 105c B+ Filter capacitor
>MSH1FAP08 K4900 / K5501 Flyback
>2SD871
>STR380
I haven't ordered any new ribbon cable yet. I thought I might get away without it.
>So far I've got the original linear power supply up and running and have dialed in at +5.00 volts, or above to the RAM chip and the ROM are getting around +5.08 volts.
>When I first powered the game up I had a, "1-1-1" error and the video can be seen here: https://youtu.be/AbfuZPFYaxA and a ROM error 7 on the screen.
>I cleared the RAM error and still had the ROM 7 on the screen and and flashing, "2-3-1"; "2-0-1" and a rug pattern, then after a while the 8 segment LED would display, "0" and the screen would start cycling the game screens one screen and the video is here: https://youtu.be/MGWyUoSnoP8
>I took the board back to the bench and cleaned off the window of the ROM 7 and erased the chip and then downloaded the new EPROM and reburnt the EPROM and checked it to make sure and I was successful. I put the ROM 7 back in the board and then back into the game and now have a, "2-0-1" and just a rug pattern, that keeps resetting.
John
I have since replaced:
>a new 110 volt power cord and plug from the wall outlet to the machine;
>all electricity capacitors;
>all header pins with Molex pins;
>all .156 Molex KK Series Connector Housing and Molex .156 Trifurcon Pins Female 18-20 AWG;
> Williams D-8784 Mega Deluxe Power Supply Rebuild Kit;
>10K OHM Williams +5vdc Power Supply TRIMMER POTENTIOMETER (P1037);
>Williams 4164 RAM adapter;
>new 4164 RAM; and
>new dual wipe IC sockets for the new 4164. After desoldering 400 joints with a Soldapullt and wick, I snaped and bouught a Hakko FR300!
and also have but, haven't installed because, I was going to try and get the game up and running first:
>Wells Gardner K4900 Series Cap Kit;
>560uF 200V Nichicon 105c B+ Filter capacitor
>MSH1FAP08 K4900 / K5501 Flyback
>2SD871
>STR380
I haven't ordered any new ribbon cable yet. I thought I might get away without it.
>So far I've got the original linear power supply up and running and have dialed in at +5.00 volts, or above to the RAM chip and the ROM are getting around +5.08 volts.
>When I first powered the game up I had a, "1-1-1" error and the video can be seen here: https://youtu.be/AbfuZPFYaxA and a ROM error 7 on the screen.
>I cleared the RAM error and still had the ROM 7 on the screen and and flashing, "2-3-1"; "2-0-1" and a rug pattern, then after a while the 8 segment LED would display, "0" and the screen would start cycling the game screens one screen and the video is here: https://youtu.be/MGWyUoSnoP8
>I took the board back to the bench and cleaned off the window of the ROM 7 and erased the chip and then downloaded the new EPROM and reburnt the EPROM and checked it to make sure and I was successful. I put the ROM 7 back in the board and then back into the game and now have a, "2-0-1" and just a rug pattern, that keeps resetting.
John
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