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Chapter 6 Common Fault Treatment
Cleaning with lens tissue is allowable as required. Do not scratched film
layer.
（3）Inspect whether other optical lens are clean, such as red light
combiner, galvanometer, field lens.
（4）Inspect whether optical output is uncovered, isolator output terminal
and galvanometer are at grade.
（5）Normal loss of power from using for 20,000 hours.
（6）There may be breakage while marking resulted from by signal
interference or ground connected incorrectly. The leads of weak and
strong current cannot be linked together or at the same side. Use the
signal wire with shielded function.
