I've been having way too many of these turds severely undertone themselves (usually black) and I've finally caught one in the act today.
The customer was printing a duplex 11x17 document with heavy black text, and high density red and orange images. Black was totally trashed, but the magenta was just starting to go.
ID sensors were nasty, so I cleaned everything up and tried to force add toner to M and K - to my surprise, Black density came back up nicely but Magenta would not, and finally came up with a toner near end condition on a nearly full bag.
The toner line was clean, so I tore down the pump (yuck!) and it had gotten hot enough to fuse a big clump of toner right in the inlet as well as chunks all through the screw and it had the rubber worn out and breaking down.
Has anybody else seen this?
Given the number of chunks I've had to clean from behind the doc blades on these machines, I suspect this is happening to a lesser degree quite frequently.
I also suspect since the toner in this machine is 10% carrier that the abrasiveness may be wearing the pump causing them to run less efficiently and produce more heat (maybe why the lowered the content in the Pro C700 and C900)
Thoughts???
If this is common I may start replacing the pumps on some sort of PM basis - it would save me a lot of trouble to get these beasts running on par with their predecessors.
The customer was printing a duplex 11x17 document with heavy black text, and high density red and orange images. Black was totally trashed, but the magenta was just starting to go.
ID sensors were nasty, so I cleaned everything up and tried to force add toner to M and K - to my surprise, Black density came back up nicely but Magenta would not, and finally came up with a toner near end condition on a nearly full bag.
The toner line was clean, so I tore down the pump (yuck!) and it had gotten hot enough to fuse a big clump of toner right in the inlet as well as chunks all through the screw and it had the rubber worn out and breaking down.
Has anybody else seen this?
Given the number of chunks I've had to clean from behind the doc blades on these machines, I suspect this is happening to a lesser degree quite frequently.
I also suspect since the toner in this machine is 10% carrier that the abrasiveness may be wearing the pump causing them to run less efficiently and produce more heat (maybe why the lowered the content in the Pro C700 and C900)
Thoughts???
If this is common I may start replacing the pumps on some sort of PM basis - it would save me a lot of trouble to get these beasts running on par with their predecessors.
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