Arcade Collecting > Pinball
Black Knight pin blowing fuses
HHaase:
Leftmost fuse on sys6 power supply is power to the flippers. Shouldn't keep it from starting a game, would definitely keep the game from being playable though. Might find the next fuse bad too, and you may want to look at replacing the backbox rectifier for the solenoids.
Right now though I'm only running on 1 hour sleep since noon yesterday, so I'm just too tired to take a serious look at the problem right now while also chasing the baby. Will come back with more ideas after I've had some rest and have my skull CPU running at full speed.
-Hans
lilshawn:
--- Quote ---Turned it on the next day, machine lights up but won't start a game.
--- End quote ---
you'd be surprised what pressing down the main CPU chip will do. also give the mainboard connectors a re-seat.
SirPeale:
--- Quote from: lilshawn on September 10, 2010, 01:09:55 pm ---
--- Quote ---Turned it on the next day, machine lights up but won't start a game.
--- End quote ---
you'd be surprised what pressing down the main CPU chip will do. also give the mainboard connectors a re-seat.
--- End quote ---
All that was done already. Replaced the connectors, reseated all socketed chips...
My guess? The solenoid fuse is also bad, but "looks" good. The guy doesn't have a meter to test the fuses, so that's out.
What's the rating on the flipper fuse? The guy states it only says "32V" and "ACC15". ACC is the fuse type, but I don't see that being a 15A fuse.
lilshawn:
Power Supply Fuses:
F1 = Score display 90 volts AC, .25 amp Slow Blow.
F2 = Solenoids 28 volts DC, 2.5 amp Slow Blow.
F3 = Lamp matrix 18 volts DC, 8 amp Fast Blow.
F4 = Flippers 28 volts DC, 10 amp (2 flippers) or 15 amp (3 or 4 flippers) Fast Blow
F5 = 9.3 volts AC (input for +5 volts), 7 amp Slow Blow.
F6 = 9.3 volts AC (input for +5 volts), 7 amp Slow Blow.
F7 = General Illumination for pinballs, 6.3 volts AC, 20 amp Fast Blow.
Sound Board Fuses:
F1 = 9.3 volts AC, 4 amp Slow Blow.
F2 = 9.3 volts AC, 4 amp Slow Blow.
HHaase:
This is an earlier machine, with the System 6 power supply in it, so it's got a different fuse layout.
F4 is the flipper fuse, all the way to the left, 15amp slow blow.
F2 is the next one in, for the solenoids, 2.5amp slow blow.
If it's just the flipper fuse blowing, do the regular tests of the coil resistance, check the EOS switches. Don't forget to check that the rubber insulation is in place on the flipper pawl where it contacts the EOS switch, or you could be grounding out the coil power into the flipper bracket.
If both of those fuses are blowing, then the first common component in the circuits is the left side backbox rectifier. Standard stuff there, 35amp 400v rectifier available everywhere, easy enough to test/replace. I assume you already put the additional fuses on one of the AC input legs for both rectifiers? Also, solder the wires down on the rectifier legs, connections there can get corroded and cause all sorts of issues in the long term.
-Hans
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