Read Sharp XG-MB70X (serv.man13) Service Manual online
45
XG-MB70X
Checking RS-232C
Communication is disabled even though
connecting the control PC and projector
with a RS-232C cable.
connecting the control PC and projector
with a RS-232C cable.
Is the connecting cable connected
correctly? (cross cable)
correctly? (cross cable)
Replace the connecting cable.
Does pin (8) of IC8002 receive a signal?
Check R8002 and the peripheral circuits of SC8001.
Does pin (4) of IC8202 receive a signal?
Check the peripheral circuits of IC8002.
Do pin (3) of IC8202 output a signal?
Check IC8202 and the peripheral circuits of the
microprocessor IC8001.
microprocessor IC8001.
Does pin (106) of IC2201 receive a
signal?
signal?
Check the peripheral circuits of the microprocessor
IC8001 and IC2201.
IC8001 and IC2201.
Do pin (105) of IC2201 output a signal?
Check the peripheral circuits of the microprocessor
IC2003 and IC2201.
IC2003 and IC2201.
Check the peripheral circuits of the
microprocessor IC8001.
microprocessor IC8001.
YES
NO
YES
NO
YES
NO
NO
NO
NO
YES
YES
YES
YES
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