Uniden UM425 VHF DSC 사용자 설명서

Disconnect the 

1. 

accessory cable from the accessory connection on 

the radio.
Connect the BLACK wire of the 

2. 

accessory cable to the GROUND 

WIRE of your external speaker. 
Connect the RED wire of the 

3. 

accessory cable to the POSITIVE (+) 

WIRE of your external speaker. 
Be certain all wire connections are secure and that all open wires are 

4. 

adequately covered.
If you are finished connecting all external accessories, line up the 

5. 

arrows on the side of the 

accessory cable and connector and connect 

the 

accessory cable to the accessory connector on the back of the 

UM425.
NOTE: To extend the life of the radio, use waterproof tape to seal 

electrical connections.

If you connect the radio to a PA speaker, you can use the PA feature to make 

announcements to other boats and people nearby.
The UM425 supports an external PA speaker with the following specifications:

• 

Minimum impedance of 4 Ohms

• 

Minimum power handling of 10 Watts

1. 

Disconnect the 

accessory cable from the accessory connection on the 

radio.

2. 

Connect the BLUE wire of the 

accessory cable to the GROUND 

WIRE of your PA system. 

3. 

Connect the BROWN wire of the 

accessory cable to the POSITIVE 

(+) WIRE of your PA system. 

4. 

Be certain all wire connections are secure and that all open wires are 

adequately covered.

5. 

If you are finished connecting all external accessories, line up the 

arrows on the side of the 

accessory cable and connector and connect 

the 

accessory cable to the accessory connector on the back of the 

UM425.
NOTE: To extend the life of the radio, use waterproof tape to seal 

electrical connections.

UM425 VHF OM.indd   49

28/9/11   11:55:22 AM