(Topic ID: 115874)

Bally Spectrum, Looking for Schematics

By mg81

9 years ago



Topic Stats

  • 6 posts
  • 4 Pinsiders participating
  • Latest reply 9 years ago by mg81
  • Topic is favorited by 1 Pinsider

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#1 9 years ago

I am hoping someone has schematics for Spectrum. I have a long dead one I have been slowly bringing back to life. IPDB has the manual but no schematics.

I finally got it to boot, but it seems to have at least two locked on lamps (likely shorted closed lamp transistor). I hoping someone has a schematic so I don't need to try and figure out which one(s) it is on the TWO lamp boards.

Also, I am sure I will need it for something else for this project.

I will post an update if/when I find a copy of the schematics. So please, if you are reading this I still need a copy of the schematics for this great, unusual pin.

Thanks in advance.

My direct email is:
[email protected]

#2 9 years ago

find the wire colors on the bulbs that are trouble and find those wires on the jacks of the lamp driver board(s). scratch a mark next to the jack pin. remove board, flip over , and follow the trace to the scr that controls it.

#3 9 years ago

I can email you some scans right away.

#4 9 years ago
Quoted from kursiv:

I can email you some scans right away.

Excellent - you now have a better version than mine !

#5 9 years ago

Ah so this is why you didnt want to have the better version.

#6 9 years ago

Thank you for the great photos. Just what I needed. What a mess of lamps in this pin!

Looking forward to playing my first game of Spectrum.

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