Bally 5500 series hopper problems

QbertWPC

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Corpus Christi, Texas
I have a Bally 5500 series slot machine. I have owned it for around 10 years, although it has been in storage for the past 5.

The problem I'm having with the hopper is that when the motor turns for a pay, its going backwards in short pulses. This causes coins to jam under the knife. I reversed the wires on the hopper motor and it spins forward now, but the hopper pays very slowly. Since it used to work very well, and no one has touched it since I've owned it, I think the wires were on the motor correctly.

The hopper knife has been replaced with a metal re-enforced replacement from Happ, as well as the rubber agitator, and the coin deflector plate.

The motor and gearbox spin normally when attached to +24vDC on my bench.

I replaced 3 puffy capacitors on the power supply, as well as the battery on the MPU.
 
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