Originally Posted by
guitar9199
Having worked on Canon copiers as well as SavRicoh and KM machines, I've seen that Magenta is the one that fails soonest. That said, is it possible that you're getting machines with fairly worn out developer units? Something to look into.
Otherwise, it might be a Toner density control error
The firmware fails to set a target minimum value for toner concentration during processing control. As a result, the machine supplies more toner than the target amount.
Do the following:
Check the following SPs to see whether or not the machine has abnormal values. If the following two conditions are true, go to Step 2.
The value of SP3-630-001 [Dev gamma: Dis/Set] is more than 1.3 AND
The value of SP 3-210-001 [Displays latest T sensor output] is more than 1.80.
Set the following SP values as shown:
SP # Description Model D146/147 Model D148/149/150
SP3-301-081 [RTP Pattern: Set] - [M/A(RTP)_Std] 0.189 0.225
SP3-301-091 [RTP Pattern: Set] - [M/A Thresh_Upp:K] 0.086
SP3-301-101 [RTP Pattern: Set] - [M/A Thresh_Low:K] 0.086
Execute ACC from inside User tools.
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