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8-mm cartridge projector
CARE AND MAINTENANCE

Religious Program Specialist 3 & 2, Module 01-Personnel Support
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To  reinstall  the  fuse,  follow  the  reverse  opera- tion. Never replace a fuse with one of a different rating  from  that  of  the  fuse  supplied  with  the projector. There  are  no  fuses  in  some  of  the  current projectors. In these models, the amplifier circuit is  protected  with  a  resistor  that  will  burn  out only  in  case  of  component  failure.  The  resistor protects  the  amplifier  from  further  damage.  If the resistor burns out, this is an indication that the  amplifier  should  be  checked  thoroughly. The preceding sections gave you some of the simple  maintenance  information  that,  as  a  pro- jector  operator,  you  should  know  and  be  able  to apply.   Perhaps   there   are   other   simple   main- tenance operations that you will perform. When more   complicated   maintenance   is   required, return the equipment to the place of issue and, if possible,  exchange  it  for  serviceable  equipment. If  your  command  has  the  capability  to  overhaul the  equipment,  turn  it  in  to  your  own  repair section.  When  your  command  lacks  a  main- tenance capability, turn the AV equipment in to the  base  AV  library,  or  to  a  contract  mainte- nance  organization. 8-mm  Motion  Picture  Projector In  our  discussion  of  motion  picture  projec- tors, we have already covered a 16-mm projector representative  of  the  many  types  currently  in use. Here we cover the 8-mm projector. It is also representative of the many varieties of cartridge projectors,  both  16-mm  and  8-mm,  that  are  in use today. CHARACTERISTICS   OF   THE   8-MM PROJECTOR.—The  cartridge  8-mm  motion picture  projector  provides  fully  automatic  pro- jection  of  super  8-mm  sound  or  silent  film.  The projector featured in our discussion is illustrated in  figure  7-17  with  its  important  parts  noted. This  projector  is  the  Kodak  Supermatic  60, manufactured by the Eastman Kodak Company. The  projector  weighs  29  pounds  (13  kg)  and  is capable  of  projecting  super  8-mm  film  in  car- tridges ranging in size from 50 feet (15 m) to 400 feet (122 m). The projector projects films at one of  two  speeds,  18  frames  per  second  (fps)  for silent films or 24 fps for sound films. It contains an   all   transistorized   amplifier   and   utilizes   a magnetic  playback  head  to  reproduce  the  sound from  8-mm  film  equipped  with  a  magnetically stripped  sound  track.  The  projector  has  a built-in screen for individual viewing or may be utilized with an external screen for group view- ing.  Whereas  most  cartridge  projectors  use  con- tinuous  loop  films,  this  model  is  equipped  for automatic  threading  and  rewinding.  Any  super 8-mm  film  may  be  loaded  directly  from  the  reel into  one  of  the  four  available  cartridges. SETTING   UP   THE   PROJECTOR.—To   set up  this  8-mm  projector,  you  first  set  it  upright on  a  firm  table  or  stand  and  unwind  the  power cord.   It   has   a   three-pronged   plug   which   is inserted in a 110- to 120-volt 60-Hz, alternating- current  outlet.  Set  the  projector  in  a  horizontal position  with  the  controls  toward  you. Pull  back  on  the  screen  cover  latch,  figure 7-17(3), and raise the screen cover (18). Push the spindle (2) to the right and move it into the cor- rect position for the cartridge you are to project. In   some   cartridge   projectors   the   cartridge   is simply  inserted  into  the  slot  provided  in  much the same manner as you would insert a cartridge tape into a tape player. Seat the cartridge on the spindle  and  close  the  screen  cover  if  you  are using an external screen. The lens provided with the projector gives a 6- x 8-inch (15-cm x 20-cm) image  on  the  built-in  screen  and  is  not  recom- mended for use with an external screen. Consult the  lens,  distance,  and  screen  chart  for  the proper  screen  and  lens.  This  chart  is  provided with  each  projector. After   raising   the   elevation   cover,   figure 7-17(13), follow the slot with the master control, shown   in   figure   7-18,   from   OFF   to   STILL. Center  the  projected  image  on  the  screen  by Figure 7-18.—Master control. 7-33







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