This means the pressure roler thermistor is out of position or defective. Take out the fuser, the thermistor is a little pad that sits against the lower roller. Check that it is clean and that it is touching the roller, this fault is telling you that the press roller heat lamp stayed active for 100 seconds and the code is produced to prevent damage to the machine. I hope this helps.
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Hi. The SC220 issue is a known one on the 3800c. It's a firmware related problem, and the code, which points to the synchronizing detector boards, is erroneous. You can read more about it, and possible ways to avoid it here. Updating the firmware to get rid of this problem is not an easy job.
Fusing lamp overheat error (rear) 555 A After the fusing temperature reaches the target temperature, the fusing lamp does not turn off for 20 consecutive seconds. ?? Fusing thermistor defective or out of position ?? Power supply board defective
On the screen where it says "Call for service," there should be an error code (starting with "SC" and ending with a 3-digit number). This code can tell you what is wrong with your machine -- what code is displayed?
Does turning the machine off (with the main, orange power switch) and then back on clear the error message?
When the power switch is turned on. The machine checks how many Zero-cross signals are generated during 500 ms. If the number of Zero-cross signals is more than 66 or less than 45 and the condition is detected more than 10 times this code is shown.
Cause is electrical noise in the supply from the power cord. Solution
That is not a good idea. The oil is kept track of by counting pages, not by a sensor that measures the oil level. The oil runs out and the machine can't tell and now you have ruined the fuser. Which cost a lot more than the oil tank.