理光5000报sc440怎么回事 进维修模式在退出来试试 SC440,主电机不动,股也不动,更换主电机,也还是一样 Code440 Description Transfer belt bias error The feed back bias from the transfer belt is more than 4V for 60 msec while the transfer belt bias is output. The A/D conversion level is 20 or less for 60 msec. The PWM duty is 24% or more for 60 msec. Causes • Power pack broken • Defective harness • Disconnected connector 转印带问题 具体应该是转印带下面那个传感器脏了