Konica Minolta 1051

[cmitch]

Our service was just cancelled after 10 long years. Machine has been great the last 8 after earlier issues were addressed. Lately, we've been having a scumming/backgrounding issue with some toner pickup happening smack in the middle of sheet. That appears to be cleaning blades since that was what always cleared up the lines appearing on the sheet. however, the backgrounding over entire sheet (looks like press scum all over) is steadily getting worse to the point we can no longer run it. Charge corona is new, transfer belt is new, developer is new, drum has about 90,000 on it. Any ideas where I need to look. I admit I am new to service on this machine so I'm sure I'll get in the groove once I am aware of what to do. Attached is a pic of what I am talking about:
IMG_1269.JPG

[cmitch]

Not that there is any interest in this thread but we found the problem. As I said we are learning. Toner density sensor below drum was the issue. We vacuumed out area and cleaned sensor and all is well.