三星k2200打印机开机显示未安装成像装置 三星K2200 朱嚣蹰 2018/11/22 20:58:03苏州吴中三星维修站电话-696l6769 Code C3-1312 Display Imaging Unit Failure: #C3-1312. Install imaging unit again. Description Toner sensor is defective. The machine can’t detect the sensor signal in the imaging unit normally. Remedy 1) Install the genuine samsung imaging unit. 2) If the imaging unit is already installed, check the following. • Reinstall the toner cartridge and imaging unit. • Check if the CRUM connector is normal. • Turn the machine off then on.