I just joined the club last weekend. Have been working through a few items and have most of the resolved.
The disc's were spinning when I picked up the machine, but when I set it up at home they were not working. If I wiggled the PCB under the motor when on coil check 27, it would work. I reflowed the solder to the tabs of the motor and the game worked great for about 24 hours. Now the disks do not spin at all.
In Coil check 27, I get a constant 33volts to the motor on the tab on the right side (when lifting the playfield straight up and looking from the front of the game) The left tab jumps from 33volts, to 0 about every second or 2; which sounds correct to me because the machine is pulsing the motor.
I am getting continuity from the tab to the back of the PCB, so I think the cold solder joints have been corrected.
The resistor is checking out at 11Ohms.
The disks spin easy when moving by hand from the top of the playfield.
Is there any other diagnostics I can or should perform? The motor seemed fine and strong prior to just not working.
Any help is appreciated.