11.MAINTENANCE & TROUBLESHOOTING

11.3Simple 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

Remedy

 

Power cannot

Mains switchboard may be off.

Turn on the mains switchboard.

be turned on.

(DC) voltage is too high.

Check supply voltage.

 

Battery may have discharged, or

Recharge battery and tighten battery

 

 

poor contact at terminals.

 

terminals.

 

Display

Contrast is too low.

Operate the 9/

 

 

 

key to adjust

 

 

 

 

 

 

indications do

 

 

 

contrast.

 

not appear but

 

 

 

 

 

 

 

 

 

key lamps are

 

 

 

 

 

 

 

 

 

lit.

 

 

 

 

 

 

 

 

 

Power is on but

Loudspeaker is off.

Operate the 7/

 

 

 

key to turn on the

 

 

no sound from

 

 

 

loudspeaker.

 

loudspeaker.

 

 

 

 

 

 

 

 

 

Poor articulation

Wrong class of emission

Class of emission should match that of

 

 

may be in use.

 

incoming signal.

 

Output power

Power is automatically reduced

Wait until the unit returns to normal

reduced to LOW

 

to protect against overheating

 

condition.

 

 

 

due to continuous transmission.

 

 

 

 

 

 

 

Antenna coupler

Antenna may be

Check antenna connection.

cannot tune

 

disconnected or shorted to

Recommended length is 10 to 18

antenna

ground.

 

meters.

 

 

Antenna is out of tunable

Check coupler ground.

 

 

length.

Checks mains voltage and polarity.

 

Poor grounding of antenna

 

 

If normal, reset breaker.

 

 

coupler.

Check cable.

 

 

Breaker in coupler has

 

 

 

 

 

 

 

 

 

 

 

tripped.

 

 

 

 

 

 

 

 

Connection cable loosened

 

 

 

 

 

 

 

 

 

or disconnected.

 

 

 

 

 

 

 

The message

Input has been switched from AC

Press the CANCEL key. The output

“Ship’s mains

 

to DC when AC FAIL line of

 

power can be increased on the RT

failure” appears,

 

AC/DC power supply unit

 

display. Note that the output power

and Output

 

PR-850A is connected to

 

remains “HIGH” when it occurs while

power indicator

 

FS-5070.

 

sending the distress call. When AC power

blinks.

 

 

 

is restored, this problem is automatically

 

 

 

resolved.

 

Transmission

 

 

 

 

 

 

 

 

 

 

 

 

 

power is

 

 

 

 

 

 

 

 

 

decreased to

 

 

 

 

 

 

 

 

 

LOW2.

 

 

 

 

 

 

 

 

 

(FS-5070 only)

 

 

 

 

 

 

 

 

 

11-3

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Image 171
Furuno manual Simple Troubleshooting, 11-3, FS-5070 only