AUDIO AND VISUAL SYSTEM (w/o Microphone) Sound Quality is Bad in All Modes

INSPECTION PROCEDURE

PROCEDURE

1. ADJUST SOUND QUALITY

   
   

   1. Adjust the sound quality.

      
      

      1. Operate the radio receiver to adjust the sound quality.

         OK
         The malfunction disappears.

   
   

   OK

   SYSTEM IS OK

   NG

   REPLACE RADIO RECEIVER