柯美C221彩色复印机打印重影，套色不准，转印带磨损严重？

会员1615278

接修一台柯美C221彩色复印机，打印彩色图片时边缘有严重重影，套色明显不准。
进入维修模式做“图像稳定”和“套色调整”，做了几次都无法通过，机器报错。
清洁了IDC传感器（图像浓度传感器），用吹气球吹了激光器玻璃，故障依旧。
拆开侧盖，观察转印带，表面有轻微磨损痕迹，且转印带上的清洁刮板处堆积了大量废粉。手动转动转印带，感觉有些吃力。
怀疑是转印带老化变硬，导致转印效率下降，或者是转印带驱动齿轮打滑。
柯美C221套色不准重影，一般是清洁哪个传感器？是转印带需要更换，换转印带有什么注意事项？
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