[Error Code] bizhub 421 error code c3902

[ajim shine]

i have proble with bizhub 421 .error code c3902,3808, and other code that show problem about tempreture high/low. i was change other entire fusing unit from other o.k machine and the same problem still come.... please how to solve this problem

[stevena86]

Re: bizhub 421 error code c3902

My suggestion is to replace the entire fuser. Not sure if you said you did that, as your original post was sort of confusing on that part.

I've had these machines give similar fuser codes, and I've rebuilt the entire thing minus the metal frame and the code still came back. Only ordering the entire fuser and replacing the entire unit solved my problem. Not sure if one of the sensors starts grounding out against the frame or what, but that was my solution I found.

Good luck to you.

[rrrohan]

I had this recently, ended up being the power supply

[ajim shine]

Re: bizhub 421 error code c3902

After change entire fusing machine o.k. for a 4-5 hour.next morning the problem come again y

[Downunder]

Re: bizhub 421 error code c3902

It's also important to make sure that you clear the code correctly -- not just turn off and on .

[stevena86]

Re: bizhub 421 error code c3902

I would change the PRCB then. Both codes you referenced, that is the only other common item that links them both.

[MFPTech]

Re: bizhub 421 error code c3902

i have proble with bizhub 421 .error code c3902,3808, and other code that show problem about tempreture high/low. i was change other entire fusing unit from other o.k machine and the same problem still come.... please how to solve this problem

Replace thermistors with the right ones. The part number might be the same but the wires are of different color from original ones. Make sure to use thermistors with the same wire color as the original thermistors.

[ajim shine]

Re: bizhub 421 error code c3902

It's also important to make sure that you clear the code correctly -- not just turn off and on .

all ready make trouble reset.... any sugestion to clear the code....!!!!!! i take out the power supply and test it to other machine.i think the power supply o.k because other machine running normaly.....

[mikeena]

Re: bizhub 421 error code c3902

all ready make trouble reset.... any sugestion to clear the code....!!!!!! i take out the power supply and test it to other machine.i think the power supply o.k because other machine running normaly.....

it sounds stupid but i would check the power make sure your machine is recieving the correct amount of it if you replaced the fuser and the code went away chances are likely its the fusing unit. could the code be reset at all with old fuser in it if not something on the fuser keeps having issues. I have had a few codes pop on me for fusing units before and it ended up being the machine was receiving a low amount of power causing the code