Panasonic CF-72 - Manual (Page 25)

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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
Troubleshooting
procedures
Source of
problem
Component
No. Result
1 Data cannot be sent or
received.
1-1
Is the Infrared Communica-
tion Port enabled in Setup?
YES Go to No. 1-2
NO Improper setting
2 Transmitted data becomes
corrupted.
2-1
Is the transmission distance
within 20-50 cm?
YES Go to No. 2-2
NO
Use within
specified distance
2-2
Is the transmisson path
clear of obstacles and
interference?
Is the unit operated away
from TV sets, video, wireles
headphones, incandescent
lamps or other electronic
equipment?
Is the unit operated away
from direct sunlight?
YES Main PCB
IC5
IC21
NO
Change operating
environment
1-2
Is the same transmission
protocol set for both the
sending and receiving units?
YES Go to No. 1-3
NO Improper setting