Bizhub 250 Turnaround unit

[soltec]

I have a Bizhub 250 with a duplex issue only, all single sided output is fine. When the tunaround unit motor starts up to drive the paper out of the machine I get a grinding noise and there is no drive to the exit rollers, so the paper stops immediately. I have replaced the motor and the gears on the drive train and the exit roll shaft I have also replaced the sensor in the unit as alast resort and nothing has fixed the fault. Can anybody help ???

[minimerlin]

I have a Bizhub 250 with a duplex issue only, all single sided output is fine. When the tunaround unit motor starts up to drive the paper out of the machine I get a grinding noise and there is no drive to the exit rollers, so the paper stops immediately. I have replaced the motor and the gears on the drive train and the exit roll shaft I have also replaced the sensor in the unit as alast resort and nothing has fixed the fault. Can anybody help ???

Have you checked to see if the interlock spring has fallen off....it ensures that the gears engage to drive the fuser exit?

[soltec]

perhaps my post was a bit confusing, the fuser exit rolls are working correctly and the machine exits simplex jobs in to the catch tray without any problem. However when you send a duplex job the diverter comes in to position to send the paper up to the turnover unit and as soon as drive comes on to the turnover unit from its motor you get a noise and no drive to the rollers and the lead edge of the paper stops at the roller.

[Downunder]

your main board has gone...

[soltec]

Just been back to the customer with a few assemblies, turaround unit and fuser to eliminate them from the equation each with no result. The Mechanical control PWB-A was now my next move. So thanks for confirming my suspicions. Will let you know if I am smiling or not when I have fitted the part. Many Thanks

[soltec]

thanks for all your help downunder machine up and running

[ni311]

So, what was the solution?

[soltec]

replaced the main board PWB-A