I would try firmware update and have a fuser unit available to replace. We have replaced a number of fusers and returned them for warranty. PWB replacement last option.
The zero cross error tells you that there are neutral to ground transients. In plain language, dirty AC power.
Copiers are for the most part ground switching devices. If you don't have a good ground there is no guarantee the the various electronic components will come on when desired.
Most of the equipment that I've worked on allow for 0.5vac or less neutral to ground. The VOM is not the best possible tool for documenting this kind of problem. After all, how long are you going to stand there and watch it? A Power Quality Analyzer records all events preferably over 48 hours. The better ones generate event reports.
It can be very hard to convince a customer that they have a power issue. Electricity is a difficult enough concept for most people, how could it be dirty? Can't we just wash it? Without the report you don't have a leg to stand on. =^..^=
__________________________ RTFM Do yourself a favor. Buy a manual and read up on your problem before posting. I enjoy helping those that are willing to help themselves. =^..^=
kyocera have changed the dimensions of the plastic housing that holds the fuser connector in the machine, we change this to the new type and no more errors.
the replacment housing for the fuser connector is on kmaconnect in one of the latest tech bulletins it gives you the part numbers and install instructions
I found the best fix for this code
sim 163
reset the fuser code and you will have no problems.
You can not troubleshoot a sc-6400.
don't rpl. pwb's just reset the fuser code with sim 163
sorry i asumed u had already tried resetting the fuser using 163 thats why i asked you to try the bracket. if it keeps comming back i can give u the part number
Craps Champion!
C4200 Error On Kyocera mita 
Linear Mode
