Dsc 428 Black Dev Unit

[CrapAimer]

Put a new Black Dev unit into machine two days ago, same fault has occured blank patches, as if dev burnt out. ???

[teebee1234]

Sounds like the developer clutch needs to be replaced. Pretty common, clutch doesn't release and the developer gets depleted in no time. Part #AX200273

[Ricohslave]

+1 on that.
Check for diagonal bands in solid areas and if dev unit feels very light, definately faulty clutch

[freginold]

Yup, we have those clutches go bad on older machines all the time. Put a new black DV unit when you replace the clutch as well.