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EIP-3500
Checking RS-232C
Communication is disabled even though
connecting the control PC and projector
with a RS-232C cable.
YES
Is the connecting cable connected
correctly? (cross cable)
YES
Does pin (8) of IC8002 receive a signal?
YES
Does pin (4) of IC8202 receive a signal?
YES
Do pin (3) of IC8202 output a signal?
YES
Does pin (106) of IC2201 receive a
signal?
YES
Do pin (105) of IC2201 output a signal?
YES
Check the peripheral circuits of the
microprocessor IC8001.
NO
Replace the connecting cable.
NO
Check R8002 and the peripheral circuits of SC8001.
NO
Check the peripheral circuits of IC8002.
NO
Check IC8202 and the peripheral circuits of the
microprocessor IC8001.
NO
Check the peripheral circuits of the microprocessor
IC8001 and IC2201.
NO
Check the peripheral circuits of the microprocessor
IC2003 and IC2201.
46
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