Checking RS-232C
Communication is disabled even though
connecting the control PC and projector
with a RS-232C cable.
Is the connecting cable connected
correctly? (cross cable)
Replace the connecting cable.
Is there any signal at pin (8) of IC8002?
Check SC3501, R2039 and their peripheral circuits.
Is there any signal at pin (106) of IC2201? Check IC2006 and its peripheral circuits.
Check IC2002 and its peripheral circuits.
NO
YES
NO
YES
NO
YES
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