我看到國外的這個文章
It turned out to be the limiter on the pressure roller.
The machine was going through the motions to retract the fuser pressure but it was going too far and touching the upper roller instead of a 3-4mm gap.
This appears to have caused heat transfer from the upper to lower and the machine has been trying to cool the lower when the "Warming up" message was on screen.
寫出可能是定影掍的压力, 不知要怎麼調整?