I have a Rock-Ola 490-1 and the unit keeps blowing a transistor in the power distribution assembly. I thought there might be a short in the wiring so I was checking all the output blocks of the power distribution assembly so I could look downstream for a short. I noticed a problem in the 15 pin Red Molex that feeds the mech-cpu-power cable 54906-A On the power supply side, a brown-white wire comes into pin 6 but on the output side, there is no brown-white wire going downstream. There does not appear to be a brown-white wire loose in the unit. If you have a 490, please check your unit to see if your Red Molex has a brown-white line on the distribution and if so, where does it go to.
Thanks,
Ed