3360318 - N11 RADIO CANNOT BE HEARD, IS HARD TO HEAR

When the control is operated, the front section and the display light up, but the sound can't be heard or it is poor or crackly
Results of the tests
0PRELIMINARY CHECKAll OKProblems metOperation
Check that there are no faults inside the radio. See Test   5570TA  Check radio system operation Continue to Step 1CAN fault detectedRestore correct operation See   E3510  RADIO
Restore correct operationReplace radio Op.   5570T80 
Internal EEPROM fault detected Replace radio Op.   5570T80 
Display segments fault detectedReplace radio
1CHECK OPERATIONAll OKProblems metOperation
Through the internal fault diagnosis of the radio, check that there are no faults in the systems controlled. See Test   5570TE  Check radio speaker operation Continue to Step 4Speaker(s) fault detected Continue to Step 2
Aerial fault detected.Continue to Step 5
2SPEAKER CONNECTIONS CHECKAll OKProblems metOperation
Check the connections between the speakers, for the different trim levels, and the radio See   E3510  RADIO Continue to Step 3Connections for the speakers fitted for the different trim levels not correctRestore the connections See   E3510  RADIO
3SPEAKER CHECKAll OKProblems metOperation
Check the operation of the speakersContinue to Step 8Right front speaker defective Replace the speaker
Left front speaker defectiveReplace the speaker
Right rear speaker defectiveReplace the speaker
Left rear speaker defectiveReplace the speaker
4INTERNAL AMPLIFIER OPERATION CHECKAll OKProblems metOperation
Check that the fault is not present for other audio sources. (Listen to an audio CD in the player)Continue to Step 5Poor audio reproductionReplace radio Op.   5570T80 
5RECEPTION ZONE CHECKAll OKProblems metOperation
Check that the problem does not occur in poor reception areas, when moving away from these areas the reception should improve substantially. It is also possible, if the reception area is very bad, that attempts to switch between frequencies may seem like pausesContinue to Step 6Poor receptionDeactivate the A.F. function
6AMPLIFIED AERIAL CHECKAll OKProblems metOperation
Check the reception system by carrying out the check See Test   5570TB  Check radio aerial reception in the following order:

  • aerial voltage
  • state of the aerial - short circuit or open circuit
Continue to Step 7Aerial tension not correct. Continue to Step 7
Aerial short circuited.iContinue to Step 7
Aerial with open circuit.Continue to Step 7
7AMPLIFIED AERIAL CHECKAll OKProblems metOperation

Check the reception system in order:

  • continuity of the coaxial aerial cable
  • aerial amplifier or actual amplifier power supply See   E3510  RADIO
Continue to Step 8Aerial cable faultyRenew or replace the aerial cable
Amplifier supply leads faultyRepair or replace supply lead
Aerial amplifier faultyReplace aerial amplifier
8CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis