A transparency was put in the copier & melted, now the copies is displaying a u4 error. what can I do?
I have a U4 error that is coming up when the unit is turned on, any suggestions or solutions to my problem???
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1. Check for paper on the fuser. Y remove paper N proceed to step 2 2. Check the installation of the fuser assembly, make sure it is securely installed. Y reinstall fuser N proceed to step 3 3. Remove the fuser. Check the conductivity of the contact points of the thermostat, are the contact points connected N replace the fuser
The U4 codes for Xerox machines are for the fuser (heat roller) unit. It's rarely something that you can fix yourself I'm afraid.. Sometimes it pops up from overwork and powering off the machine allows it to cool down but if it keeps coming back you need to get it checked out properly..
The fuser is not warming up.
On that machine under the web there is a thermal fuse on a white plastic mount, it has one screw through it.
It is most likely blown. Possibly caused by a jammed paper in the fuser.
That fusable link needs to be replaced.
Most likely replace the fuser.
And be sure you use transparencies marked for copiers only.
The U4 is an over heat because the tranaparency stuck between the heat roll and the thermistor. Causing the fuser to stay on and blow the overheat.