3-4: Troubleshooting Hints - Eiki ESL SERIES Service Manual

C.
IC's are best checked by checking the signal input and output condition. This can be
done by inserting a low level audio tone into the MIC jack and the signal path from the
input of IC-1 and to the output of IC-2.
D. Amplifier test cables can be easily made from locally available parts. A nine pin miniature
tube socket and male plug can be wired as an extension power cable, allowing the ampli-
fier to be operated away from the projector. The solar cell and exciter lamp connection
can also be extended if so desired. (Fig. #5)
Note Forward and reverse resistance LOW
&
HIGH is a suggested quick and easy check of
out of circuit components for shorted and open junction test. A VOM will not test the
quality of a semiconductor accurately.
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