I've got an "L-Shape" Taito upright Space Invaders machine that's got me stumped, and I was wondering if anyone could help me out...
Whenever I go to power up the machine, if everything is connected, I blow the 3A fuse on the transformer. If I disconnect the edge connector running to the daughterboard (Connector G), everything else seems to power up just fine.
Checking voltages, the +18v line seems to be running at about +19.3v, and the +5 and +12 v lines are at +5.17 and +11.92, respectively. Pots on the power supply don't seem to adjust the 18v line.
I've also spot-checked the diodes on the daughterboard, but they all seem to be working just fine.
I'm kinda out of ideas... any thoughts?
Whenever I go to power up the machine, if everything is connected, I blow the 3A fuse on the transformer. If I disconnect the edge connector running to the daughterboard (Connector G), everything else seems to power up just fine.
Checking voltages, the +18v line seems to be running at about +19.3v, and the +5 and +12 v lines are at +5.17 and +11.92, respectively. Pots on the power supply don't seem to adjust the 18v line.
I've also spot-checked the diodes on the daughterboard, but they all seem to be working just fine.
I'm kinda out of ideas... any thoughts?
