Video DoorPhone System (490-2600) Care and Maintenance Faxback Doc. # 34180 CARE OF THE SYSTEM 1. Use dry and soft cloth to clean the monitor unit. Never apply thinners benzene or insecticides to it since they may damage the unit surface. 2. The handset may become slightly warm due to the temperature developed in the VideoDoor Phone main unit, but this is not a symptom of failure. 3. The camera unit is water resistant against normal ingress of rain, do not clean by spraying directly using a hose. (LB/EB 07/25/96)