Arcade Collecting > Pinball
Bally home pinball model service information
Ken Layton:
The main "corner cutting" they did was with the power supply board.
Pinball Wizard:
--- Quote from: Ken Layton on January 03, 2013, 11:45:30 pm ---The main "corner cutting" they did was with the power supply board.
--- End quote ---
That is very true, but it scares me. Who doesn't fuse this crap!?!?!
Ken Layton:
Yeh those Series 1 machines had no fuses!
cheeseviking:
I've been trying to track down some info on the Pinball Mind.
After a few emails I was pointed to http://www.marcospecialties.com/
They think the new replacement boards will be ready for sale by Mid Feb.
Ken Layton:
That is good news, but I see no mention of it on Marco's website. Any idea on pricing?
Originally, "Nightmare Tony" (the late Tony Gonzales, the Pinball Mind creator) had envisioned selling this with a Peter Chou screw terminal switching regulator power supply kit. The new power supply would handle the +5 volts for the Pinball Mind logic board and +12 volts for the amplifier section of the board. The main weakness of the home model Bally pinballs was the cheapo power supply that had NO overvoltage protection. When any component on the original power supply failed, usually a catastrophic failure followed with several other components going bad too. When that happened, +22 volts (solenoid power) would get applied to the +5 circuit and fry the cpu board. Tony also envisioned the need for a decent regulated +12 volts for those people who wanted to mod/upgrade their home model machines with things like lighted flipper buttons.
The main thing was that the new Peter Chou power supply would supplement the original power supply board and power transformer. The original power supply board would only be providing solenoid voltage and switched illumination voltage. With the Peter Chou handling +5 and +12 volts, there's no way the power supply could fry the new board.
Tony had also thought of adding fuses to the series 1 transformer assembly and replacing those crappy "push-to-reset" circuit breakers on the series 2 transformer assembly with conventional fuses for reliability.
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