Table   4-1.   OPERATOR   PREVENTIVE   MAINTENANCE If  the  equipment  must only   those   items   that disturbing   operation. equipment  can  be  shut N O TE TM   5-6675-325-14 CHECKS   AND   SERVICES be   kept   in   continuous   operation,   check   and   service can   safely   be   checked   and   serviced   without Make  the  complete  checks  and  services  when  the down. B  -  Before W  -  Weekly AN   .   Annually (Number)   -   Hundreds   of   Hours D   -   During M   -   Monthly S   -      Semiannually A   -   After Q   -   Quarterly BI -   BiennialIy lN- TER- VAL B ITEM   TO   BE   INSPECTED PROCEDURE VERTICAL    REFLECTING    PROJECTOR Inspect   Projector. 1.   Check   for   loose   or   missing   nuts   or   screws. Tighten   or   replace. 2.   Check   for   loose   connections   or   damaged   wiring. 3.  Plug  power  cord  in,  set  POWER  switch  to  on,  and check   lights   for   proper   illumination. 4.   Check   lens   for   dust   cap.   Remove   cap,   if   present, and   clean   lens   with   lens   cleaner   and   tissue. 5.   With   power   on,   press   RATIO   switch.   Check   for proper  linkage  movement. 6. Press  TILT  switches  and  check  for  proper  easel t i l t i n g . 7. With POWER and FRONT LIGHTS switches on, check for   operation   of 8.   Check   glass   view scratches. 9. Clean  glass  view cheesecloth. cooling   fans. screen   for   cracks,   chips,   or screen   with   glass   cleaner   and For Reediness Reporting, Equipment   Is Not   Ready/ Available   If: Wiring is damaged Power switch or  power cord   is defective. Switch   is defective. Switch   is defective. Fans are defective. View  screen is   cracked, chipped   or scratched. 4-11