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Service Manager
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The MPC6501/7501 has different numbers for toner, developer, and charge rollers.
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Shadow1, what do you mean by the nearly empty Dev units ? Is the developer gone ? Have you tried removing the one way gear on the front side of the Dev unit that augers out excess Dev ?
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How about applying liquid wax to the charge rollers? I waxed one a few days ago, thinking maybe the lube won't build up on it.
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Senior Technician
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car wax, based on carnauba wax? Why you don't try the new D081 charge rollers? They should be improved.
I know Ricoh said thet the dev is not compatible with D014 but I don't see why the charge rollers won't be.
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Service Manager
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Did you pull one off and see what they improved ? Just curious I haven't had one yet.
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The product I use is called "Nu Finish" it works good on a lot of things. I've used it on drums plenty of times.
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Tech
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Just had an e-mail to let us know that there is a new fimware to fix this fault on these machines...
CAUSE:
Development ability of toner decreases, when the machine is used under low temperature (around 68 degrees F / 20 degrees centigrade) and low humidity (around 10%). Under this condition, machine tries to keep the ID (image density) on the printed image on paper constant by following two functions as a set.
Function#1:
Change the pointer table number for drum potential control higher.
Function#2:
Increasing the toner amount inside the developer by providing much toner to the development unit.
Currently, the pointer table has an upper limit (Pointer table Number 26). Therefore, the Function#1 may not be effective under low temperature and low humidity condition. Therefore, machine tries to perform Function#2 mainly. By this function, the ID (image density) on the printed image is kept constant, but the toner may scatter inside the machine as its side effects.
ACTION:
Upgrade the engine firmware to the following custom-built version.
Engine D0145402K_LR0428.fwu Ver.1.51b:01
NOTE: This custom-build engine firmware increases the upper limit of pointer table from Number 26 to Number 30 in the Function#1. By this change, the effectiveness of Function#1 increases to keep the ID on printed image constant. This leads to reducing the Function#2.
IMPORTANT
Never apply this custom-built engine firmware to the machine without toner scattering inside the machine. If you apply it to the machine without toner scattering, the following side effect will appear.
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Low ID (image density) on printed image on paper.
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Firefly symptom on halftone area.
FIRMWARE UPDATE REQUIREMENTS
This custom-built engine firmware also has the combination with other firmware mentioned in 108890. Please refer also to 108890 more in detail
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