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Interference noises: Notes

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NOTE:
  • This procedure is designed to help you find out how the interference noise has entered the system.
  • In the following subchapters, the various interference noises are differentiated.
  • The battery must be fully charged.
  • No charging unit may be connected.
RADIO SYSTEM DIAGNOSIS FOR INTERFERENCE NOISES

Work instruction Yes No
1 Does the interference noise complained about by the customer really exist? All electrical connections to retrofitted accessories such as: Disconnect 2-way radios, mobile telephones, radar detectors etc.
Step 2		 End
2 Can the interference noise be heard in all the loudspeakers? Slowly pull the receiver component(s) out of the holder and observe the noise. Does the interference noise change or disappear in the process?
Yes Step 4
No Step 3		  
3 Disconnect the antenna from the radio and observe the interference noise.
Does the interference noise change or disappear?		    
4 Does the interference noise change?    
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