Simple Troubleshooting - Furuno FS-1570 Operator's Manual

12.5 Simple Troubleshooting

The table below provides common 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
•
Power cannot be
turned on.
•
•
•
Display
indications do
not appear but
key lamps are lit.
•
Power is on but
no sound from
loudspeaker.
•
Poor articulation
•
Output power
reduced to LOW
•
Antenna coupler
cannot tune
antenna
•
•
•
•
Probable cause
Mains switchboard may be
off.
(DC) voltage is too high.
Battery may have
discharged, or poor contact
at terminals.
Contrast is too low.
Loudspeaker is off.
Wrong class of emission
may be in use.
Power is automatically
reduced to protect against
overheating due to
continuous transmission.
Antenna may be
disconnected or shorted to
ground.
Antenna is out of tunable
length.
Poor grounding of antenna
coupler.
Breaker in coupler has
tripped.
Connection cable loosened
or disconnected.
12 MAINTENANCE & TROUBLESHOOTING
Remedy
•
Turn on the mains switchboard.
•
Check supply voltage.
•
Recharge battery and tighten battery
terminals.
•
Operate the [9/
contrast.
•
Operate the [7/ ] key to turn on the
loudspeaker.
•
Class of emission should match that of
incoming signal.
•
Wait until the unit returns to normal
condition.
•
Check antenna connection.
•
Recommended length is 7 to 30
meters.
•
Check coupler ground.
•
Checks mains voltage and polarity. If
normal, reset breaker.
•
Check cable.
] key to adjust
12-5