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Photography (Advanced) - Advanced manual for photography and other graphic techniques
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APPENDIX  II BASIC  OPERATOR  TROUBLESHOOTING With all the automated processing equipment used in Naval imaging today, it is important for you to have a  working  knowledge  of  basic  trouble-shooting procedures. By having the ability to analyze a situation and perform some trouble-shooting steps, you are able to  isolate  problems  that  occur  with  imaging  equipment. Your ability to locate a faulty condition quickly can play an   important   part   in   shortening   the   equipment downtime. Trouble-shooting procedures are useful for automated  processors  as  well  as  cameras,  enlarging equipment, and so on. As equipment is used, the parts wear out, even with complete   and   competent   maintenance.   As   this deterioration   occurs,   more   variation   occurs   in functioning systems (the evenness of the air from one side of an air squeegee to the other, for example). Additionally,  the  larger,  the  more  complex,  and  the older  the  piece  of  equipment,  the  higher  the  probability that it will malfunction. TROUBLE-SHOOTING  EQUIPMENT To  function  correctly  and  efficiently,  you  must  care for  and  maintain  equipment  properly.  Maintenance should be performed consistently and according to established  procedures.  On  complex  equipment  there are many adjustments that must be performed. Most of these adjustments are not difficult, particularly if you follow   detailed   3-M   system   instructions   and instructions supplied by the manufacturer. DETECTING  MALFUNCTIONS Troubleshooting a continuous film processor, for example, is an action that evaluates the performance of the processor in terms of both operation and product quality. Each function on a system must operate the way it was designed. If it does not, some signs will become evident. The most common signs are detected as  follows: Hearing.  This  sense  is  used  to  detect malfunctions that produce unusual sounds. Noisy malfunctions  may  include  the  improper  meshing  of gears, worn or improperly lubricated bearings, and loose or improperly lubricated drive chains. Some types of equipment have alarm systems or buzzers to warn the operator that a problem exists. Sight.  At  times,  malfunctions  are  indicated  long before they affect product quality. These malfunctions include  those  displayed  on  the  processor  control indicators  (temperature,  replenishment  rates,  and speeds) and by indicator lights. Other signs of trouble might include movements, such as a rising lift rod or even the presence of smoke. The first step to take in trouble-shooting circuits after securing power is to inspect   the   circuit   visually.   Check   for   loose connections, loose wires, abraded wires, and loose fittings. An overloaded circuit is a serious problem; at times, the electrical demand on a circuit can cause circuit fuses to blow or circuit breakers to trip. In some cases, incorrect sizes of fuses or circuit breakers were used and the wires overheated and burned off the insulation.  This  condition  can  cause  shorts  and  grounds that  become  potential  fire  or  electrocution  hazards. Furthermore, some malfunctions can only be detected by  visual  examination  of  the  finished  product.  These malfunctions  include  scratches,  developing  streaks, drying streaks, and so on. Touch. At times, the sense of touch is the best way to detect malfunctions. This is particularly true when total darkness is required to prevent image loss or with moving equipment parts enclosed in some type of housing. Usually, defective bearings or bushings or the need for lubrication of these parts that are concealed in a metal housing can best be detected by feeling for a buildup of heat or unusual vibrations. Smell.  The  sense  of  smell  can  be  used  to identify a problem with a piece of equipment. Smoke, hot  electrical  connections,  and  so  on,  may  be  identified more readily by smell than by sight. TROUBLE-SHOOTING   TABLES Troubleshooting a processor or any other type of equipment   is   not   a   difficult   task.   Usually,   the manufacturer  identifies  the  most  common  operating malfunctions,   their   probable   cause(s),   and   the AII-1







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