
MAINTENANCE 4
■Troubleshooting
The following chart is designed to help correct prob-  | If you are unable to locate the cause of a problem or  | |||
lems which are not equipment malfunctions.  | solve it through the use of this chart, contact the near-  | |||
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  | est Icom Dealer or Service Center.  | 
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PROBLEM  | POSSIBLE CAUSE  | 
  | SOLUTION  | REF.  | 
Power does not come  | • DC power cable is improperly connected.  | •   | pgs.  | |
on when [POWER] is  | 
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pushed.  | • Fuse is blown.  | 
  | • Check the cause, then replace the fuse with  | p. 8  | 
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  | a spare one.  | 
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No sounds from the  | • Volume level is too low.  | 
  | • Rotate [VOLUME] clockwise to obtain a  | p. 7  | 
speaker.  | 
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  | suitable listening level.  | 
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  | • The squelch is closed.  | 
  | • While in base operating mode, rotate [SE-  | p. 7  | 
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  | LECT] to counterclockwise to open the  | 
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  | squelch. (When the [SQL Level Up/Down]  | 
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  | key function is assigned to [SELECT].)  | 
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  | • The audio mute function is activated.  | 
  | • Push [MONI] (if assigned) to the audio  | –  | 
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  | mute function OFF.  | 
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  | • A selective call or squelch function is acti-  | • Turn the appropriate function OFF.  | –  | |
  | vated such as 5 tone call or tone squelch.  | 
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  | • The front speaker is set to OFF.  | 
  | • Turn the front speaker ON using the op-  | –  | 
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  | tional   | 
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  | your dealer for details.  | 
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Sensitivity is low and  | • Antenna feedline or the antenna connector  | • Check and   | p. 5  | |
only strong signals are  | has a poor contact or is   | sary), the antenna feedline or antenna con-  | 
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audible.  | 
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  | nector.  | 
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Received signal cannot  | • Optional voice scrambler is turned OFF.  | • Turn the optional voice scrambler ON.  | –  | |
be understood.  | • Scrambler code is not set correctly.  | 
  | • Reset the scrambler code.  | –  | 
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Output power is too low.  | • Output power is set to Low.  | 
  | • Push [HIGH/LOW] (if assigned) to select  | –  | 
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  | the High power.  | 
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No contact possible with  | • The other station is using tone squelch.  | • Turn the tone squelch function ON.  | –  | |
another station.  | • While in base operating mode, the re-  | • Set the repeater to simplex, when other  | –  | |
  | peater is set to duplex.  | 
  | transceiver is set to simplex.  | 
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■ Fuse replacement
If a fuse blows or the repeater stops functioning, try to  | CAUTION: DISCONNECT the DC power cable  | 
find the source of the problem, and then replace the  | from the repeater. Otherwise, there is danger of  | 
damaged fuse with a new, rated fuse.  | electric shock and/or equipment damage.  | 
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D Line fuse replacement | 
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Fuse rating: 20 A
USE the 20 A fuse only.
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