AR-280 (serv.man140). 1.Change Carried Out In The Assembly Contractor Of The Toner Hopper And Developing Unit. 2.Measure Carried Out To Protect The Main Switch Harness. 3.Measure To Improve The Alignment Performance Of The Waste Toner Transport Gear. 4.Measure To Diminish Abnormal Noise Which Occurs In The Paper Delivery Reversion No.2 Bin Unit. (WHITE) - Sharp Copying Equipment Technical Bulletin (repair manual). Page 4