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4.4.10. INFRARED CCOMMUNICATION PORT DIAGNOSIS
Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.
No.
Symptom
1
Data cannot be sent or
received.
2
Transmitted data becomes
corrupted.
Troubleshooting
procedures
No.
Is the Infrared Communica-
1-1
tion Port enabled in Setup?
Is the same transmission
1-2
protocol set for both the
sending and receiving units?
Is the transmission distance
2-1
within 20-50 cm?
Is the transmisson path
clear of obstacles and
interference?
Is the unit operated away
from TV sets, video, wireles
2-2
headphones, incandescent
lamps or other electronic
equipment?
Is the unit operated away
from direct sunlight?
4 - 13
Source of
problem
Result
YES Go to No. 1-2
NO
Improper setting
YES Go to No. 1-3
NO
Improper setting
YES Go to No. 2-2
Use within
NO
specified distance
YES Main PCB
Change operating
NO
environment
Component
IC5
IC21
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