Table of Contents
Advertisement
1. Connect the BROWN wire of the accessory cable to the NEGATIVE (-) wire of your chartplotter' s NMEA data INPUT.
2. Connect the WHITE wire of the accessory cable to the POSITIVE (+) wire of your chartplotter' s NMEA data INPUT.
3. Be certain all wire connections are secure and that all open wires are adequately covered.
NOTE: To extend the life of the radio, use waterproof tape to seal electrical connections.
Connecting to an External Speaker
You can use an external speaker to monitor the radio from a different part of your boat or in a noisy environment. If you adjust the
VOLUME-PWR knob on the radio, it will also adjust the external speaker volume.
Your radio supports an external speaker with the following specifications:
• Minimum impedance of 4 Ohms
• Minimum power handling of 10 Watts
1. Connect the BLACK wire of the accessory cable to the GROUND WIRE of your external speaker.
2. Connect the RED wire of the accessory cable to the POSITIVE (+) WIRE of your external speaker.
3. Be certain all wire connections are secure and that all open wires are adequately covered.
NOTE: To extend the life of the radio, use waterproof tape to seal electrical connections.
MAINTENANCE AND TROUBLESHOOTING
Due to its rugged design, your radio requires very little maintenance. However, it is a precision electronic instrument, so you should
follow a few precautions:
• If the antenna has been damaged, you should not transmit except in the case of an emergency. A defective antenna may cause
damage to your radio.
• You are responsible for continued FCC technical compliance of your radio.
• You should arrange for periodic performance checks with your dealer.
Problem
The radio won't power on.
The radio won't transmit.
Noise comes out of the speaker all the time
I can't hear anything (no volume) from the speaker.
I can transmit, but no one can hear me.
The display flashes, and I don't know why.
I can't read the display.
The display is too bright at night.
Check the power connections.
Check the fuse.
Check the master battery switch and branch circuit that connect to the radio.
Make sure you are not in weather or scan mode.
Make sure you are not trying to transmit on a receive-only channel (see the channels
and frequency tables beginning on page 30).
Make sure you are transmitting at the correct power level for this channel (see the
channels and frequency tables beginning on page 30).
Make sure the duration of each transmission is less than 5 minutes.
Adjust the squelch level; it is probably too low.
Adjust the squelch level; it is probably too high.
Check your UIC channel settings (see Setting the UIC channel mode (USA/CAN/INT)
on page 3).
The display will flash if the radio is in a watch mode or in scan mode. Try turning off
scanning (page 6), Weather Alert Watch (page 8), or Triple/Dual Watch (see
page 10).
Adjust the contrast and backlight brightness level (see page 11).
Adjust the backlight brightness level.
Turn off the radio; hold CALL-MENU button and turn it back on (see page 11).
VHF490 RADIO
1-800-BOATING
26
Things to Try
Advertisement
Table of Contents
