TM 10-3610-202-14 Table 3-1.  Operator/Crew Preventive Maintenance Checks and Services - Cont NOTE Within designated interval, these checks are to be performed in the order listed. B - Before A - After M - Monthly D - During M - Monthly C - Combat Operability INTERVAL Item to be Procedures For Readiness Reporting, ITEM C Inspected Check for and have repaired Equipment Is Not NO. B D A W M or adjusted as necessary. Ready/Available If: 4      Light Table Check that both fluorescent tubes are illuminated, cor- rect engagement of gears on gear track and gearshaft clamps on track angles, and smooth operation of straight edge and gear assembly. If necessary, service unit in accordance with com- mercial manual instructions. 5      Camera Check correct lens calibra- tion, leaks from vacuum hoses, correct operation of vacuum pumps, and smooth operation of lens and copyboard system.  If necessary, service unit in accordance with commer- cial manual instructions. 6 Water CAUTION System Do not operate water tank immersion heater when water tank is empty. Water tank filled to correct level, smooth and leak-free operation of faucet, correct connection of heater power cord and adequate water temperature. 3-3