Diagnostic Procedure

There is much noise only on AM. Due to differences in AM and FM systems, AM is more susceptible to noise interference.

1. STEP 1. Check which comes out more noise, AM or FM. 

   Q: Which comes out more noise, AM or FM? 

   AM:  Go to Step 2.

   FM:  Refer to (Refer to INSPECTION PROCEDURE 12  )

2. STEP 2. Check that there is noise under the following state(s). 
   • A motorcycle was passing.
   • The levin was flashing.
   • A vehicle passed close by, but it appeared to be a vehicle generating a particularly large amount of noise radiation.
   • Passed beneath a power line.
   • Passed beneath a telephone line.
   • Passed close by a signal generator.
   • Passed close by some other sources of electrical noise.
   • Passed under a bridge.

     Q: Is there noise in the above states? 

     • YES:  Go to Step  4.
     • NO:  Go to Step 3.
3. STEP 3. Continue to check for static; when static is detected, check for the conditions listed above. 

   Q: Is there noise in the state described in Step   2 ? 

   • YES:  Noise prevention on the radio side is difficult. If the problem is particularly worse than other radios, consult a service center.
   • NO:  Go to Step 4.
4. STEP 4. Compare it with the other radios. 

   Q: Is the noise level worse than other radios? 

   • YES:  Consult a service center.
   • NO:  If the noise level is roughly the same as other radios, there is no action to be taken.