Simple Troubleshooting - Furuno FS-5070 Operator's Manual

11.3

Simple Troubleshooting

The table below provides possible problems and the means with which to restore normal
operation. If normal operation cannot be restored, do not attempt to check inside the
equipment. Any servicing should be referred to a qualified technician.
Problem Probable cause
Power cannot • Mains switchboard may be off.
be turned on.
• (DC) voltage is too high.
• Battery may have discharged, or
Display •
indications do
not appear but
key lamps are
lit.
Power is on but
•
no sound from
loudspeaker.
Poor articulation •
Output power
• Power is automatically reduced
reduced to LOW
Antenna coupler
• Antenna may be
cannot tune
antenna
• Antenna is out of tunable
• Poor grounding of antenna
• Breaker in coupler has
• Connection cable loosened
The message • Input has been switched from AC
"Ship's mains
failure" appears,
and Output
power indicator
blinks.
Transmission
power is
decreased to
LOW2.
(FS-5070 only)
poor contact at terminals.
Contrast is too low.
Loudspeaker is off.
Wrong class of emission
may be in use.
to protect against overheating
due to continuous transmission.
disconnected or shorted to
ground.
length.
coupler.
tripped.
or disconnected.
to DC when AC FAIL line of
AC/DC power supply unit
PR-850A is connected to
FS-5070.
11. MAINTENANCE & TROUBLESHOOTING
Remedy
•
Turn on the mains switchboard.
• Check supply voltage.
•
Recharge battery and tighten battery
terminals.
•
Operate the 9/
contrast.
• Operate the 7/
loudspeaker.
•
Class of emission should match that of
incoming signal.
• Wait until the unit returns to normal
condition.
• Check antenna connection.
•
Recommended length is 10 to 18
meters.
• Check coupler ground.
•
Checks mains voltage and polarity.
If normal, reset breaker.
•
Check cable.
• Press the CANCEL key. The output
power can be increased on the RT
display. Note that the output power
remains "HIGH" when it occurs while
sending the distress call. When AC power
is restored, this problem is automatically
resolved.
key to adjust
key to turn on the
11-3