Sharp LC-R60HDU Service Manual page 44

LC-R60HDU
TROUBLE SHOOTING TABLE
Checking remote controller
Is there output at pin (9) of
LE using remote controller?
Is there output signal at pin
(9) of LE on operation PWB?
Check IC2003 and its
peripheral circuits.
Checking RS-232C
Is RS-232C cross cable
used?
Are there input signals at
pins (11) and (13) of IC2001
by running RS-232C on
personal computer?
Are there input signals at
pins (10) and (8) of IC2001
as well as pins (7) and (3) of
IC2002?
Check IC2003 and its
peripheral circuits.
Replace remote controller.
NO
Does new remote controller
function?
YES
Remote controller defective.
NO
YES
NO
Use RS-232C cross cable.
YES
NO
Check terminal PWB.
YES
NO
Check IC2001, IC2002 and
their peripheral circuits.
YES
(Continued)
NO
YES
LE cable defective.
44
Operation PWB defective.