Hi @Paul_Feng, I responded to a similar inquiry here: Channel B downgraded - #2 by tmcnevin.
I would recommend viewing our Sensor Maintenance article. That article will explain cleaning the sensor and laser counter replacement.
Hi @Paul_Feng, I responded to a similar inquiry here: Channel B downgraded - #2 by tmcnevin.
I would recommend viewing our Sensor Maintenance article. That article will explain cleaning the sensor and laser counter replacement.