[CQ] irAdv 70xx dropping small dots of magenta toner

[misserable old git]

Hi.... I have a irAdv 7055 that is depositing very small random drops of magenta toner. The spots are less than 1mm, they do not repeat and are completely random maybe just one or two drops per page . I have replaced drum and dev, and stripped and cleaned the ITB.
My worry is it may be a hopper problem...any thoughts?

[teckat]

Re: irAdv 70xx dropping small dots of magenta toner

Hi.... I have a irAdv 7055 that is depositing very small random drops of magenta toner. The spots are less than 1mm, they do not repeat and are completely random maybe just one or two drops per page . I have replaced drum and dev, and stripped and cleaned the ITB.
My worry is it may be a hopper problem...any thoughts?

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Single color toner is dropping on the copies.

Have u Changed M TONER BOTTLE
Vacuumed Drum cavity and Adjusted Transfer Voltage.


Vacuum the entire sub hopper assembly for the particular color ( MAGENTA) that is dropping the toner, (or replace the sub-hopper unit),
also insert a new toner bottle and developing assembly.

In one case, the toner was contaminated and affected the sub hopper unit and developing assembly.

[blazebusiness]

Re: irAdv 70xx dropping small dots of magenta toner

Agree with Teckat------Change that magenta toner bottle now. See below:

Title : Toner splatter and Clumping in Developers

Problem : Tech reported that Magenta and Black was dropping random toner spots. Black was not as obvious. Solution : The toner collection PCB from Cyan to Magenta was swapped with no change. If the developer HVT was unplugged, the copy quality was washed out and that same voltage goes to the toner collection PCBs. That eliminated the HVTs as a cause. The toner in the sub hopper was emptied by removing the bottles in Magenta and Black. Once it called for toner, the Magenta and Black developer units were replaced and a new toner bottle was inserted. No spots were evident. We ran hundreds of pg 5 tests at a level of 250 and the splattering didn't return. The toner clumped due to possible high temperature storage (delivery truck, etc.) and this caused the toner to drop randomly.