Garmin 420 사용자 매뉴얼

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To turn on your unit for the first time, press and hold the   

 key until the unit beeps and turns on. Use the 

 

and the 

keys and follow the screens to configure your unit.

  NOTE: Although you can perform some checks with the boat 

trailered, the boat should be in the water to properly test the 

installation. 

1.  Select the

.

2.  Select attached

.

3.  Select the

type (if applicable).

4.  Select the

(the default is hddd°mm.mmm').

5.  Select the

(the default is 12 Hour).

6.  Select your

.

7.  Select your preferred 

of measure.

8.  Select

.

9.  Select the 

of your boat.

) after you select your 

configuration options.

  NOTE: You can adjust these options in the future from the 

Configure screen.

Because water is necessary to carry the sounder’s sonar signal, the 

transducer must be in the water to work properly. You cannot get a 

depth or distance reading when out of the water. 
When you place your boat in the water, check for leaks around 

any screw holes that were added below the water line. DO NOT 

leave your boat in the water for an extended period of time without 

checking for leaks.