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Garmin VHF 720 User Manual

Page 38

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32

Maintenance

&

Troubleshooting

APPENDIX D

Troubleshooting Guide

SYMPTOM

PROBABLE CAUSE

REMEDY

Unit does not come ON

Batteries are exhausted.

Recharge batteries

No sound from speaker

Squelch threshold level too

Set to a lower

high.

threshold point.

No channel broadcast is

Move to another

being received

channel.

Volume is set too low.

Increase volume.

Cannot transmit or

Some channels are for receive

Change channel.

transmission isn’t being

only.

received.

Batteries are exhausted.

Replace batteries.

Some channels are for low

Change channels.

power only.

Output power too low.

Press H/L key for
high power.

The displayed channel cannot

The LOCK function is on.

Press and hold the

be changed.

H/L key for at
least one second.

Error tone (2 beeps) is heard

Incorrect key selection and

Select correct key.

when a key is pressed and no

the programming is limiting

unit function is performed.

key function.