Fuser Bias

[ricardobres]

Hi, what´s the function of the fuser bias on 8500 and 105?

[blackcat4866]

It's to help keep the fuser rollers clean. Supposedly, it helps to repel the toner from the upper fuser roller.

=^..^=

[welshman]

you can disconect the lead dont do a lot anyway

and stops mirror imaging

[lkrsardis]

and sc0069 also.

[welshman]

thats code is the primary cleaner stuck nothing to do with the fuser

[blackcat4866]

I remember in my first Quest class, our instructor rambled on and on about the importance of a good fuser bias connection. When we ohmed it out it was soon discovered that there was 120 ohms or more between the roller and the terminal. The instructor then had us 'fix' this problem by applying conductive grease to the contact ring (I won't even go into how idiotic this is).

Then one of the students figured out that if you ohm it out while the fuser is rotating (and bias wire disconnected), the resistance drops to near zero.

I've never purposely disconnected the bias contact. I've accidentally left it disconnected, and didn't really notice any difference at the next roller replacement.

Now if you get a short to ground that's another story. It will pull your HVT down, and you'll get all kinds of charge related problems like poor separation (drum wraps), poor transfer, and light to blank copies.

=^..^=

[ricardobres]

Really, I fixed e069, cleaning the contacts of the fuser bias....and thanks for the information...

[lkrsardis]

welshman I beg to differ. If you have access to Canon esupport forums you will find where sc069 was caused by faulty fuser bias on the Ir105.