184000567 - N11 RADIO CANNOT BE HEARD, IS HARD TO HEAR

When the control is operated, the radio and equalised amplifier come on, but the sound is poor or crackly.
Results of the tests
0PRELIMINARY CHECKAll OKProblems metOperation
Check that the fault is not present on other audio sources. (Listen to a CD or audio cassette in the player)Continue to Step 3Poor audio reproductionContinue to Step 1
Fault in tunerContinue according to the instructions See table N12 POOR RADIO RECEPTION
1CHECK AUDIO OUTPUT CONNECTIONSAll OKProblems metOperation
Check the connections between radio and loudspeakers See E3510 RADIO Continue to Step 2Connections incorrect or faultyRepair the connections / wiring
2SPEAKER CHECKAll OKProblems metOperation
Check the operation of the speakersContinue to Step 3Front speaker defectiveReplace the speaker Op. 5570T90
Front tweeter defectiveReplace the speaker Op. 5570T92
Rear side speaker defectiveReplace the speaker Op. 5570T97
3CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentContinue to Step 4Fault persistsReplace radio Op. 5570T86
4CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis
When the control is operated, the radio and equalised amplifier come on, but the sound is poor or crackly.
Results of the tests
0PRELIMINARY CHECKAll OKProblems metOperation
Check that the fault is not present on other audio sources. (Listen to a CD or audio cassette in the player)Continue to Step 1Fault in amplifier equalizerContinue to Step 2
Fault in tunerContinue according to the instructions See table N12 POOR RADIO RECEPTION
1CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the audio output from the radio is working See E3510 RADIO Continue to Step 2Radio faultyReplace radio Op. 5570T86
2CHECK ADDITIONAL AMPLIFIERAll OKProblems metOperation
Check the power supply/operation of the additional amplifier equalizer See E3510 RADIO Continue to Step 3Fault in positive supply and/or earthReplace the component involved (if a fuse is involved, search for the cause of the problem)
Switching-on control faultyRestore the connections
3CHECK AUDIO OUTPUT CONNECTIONSAll OKProblems metOperation
Check the connections between equalizer amplifier and loudspeakers See E3510 RADIO Continue to Step 4Connections incorrect or faultyRepair the connections
4SPEAKER CHECKAll OKProblems metOperation
Check that the additional amplifer equalizer loudspeakers are workingContinue to Step 5Front speaker defectiveRepair and/or replace the loudspeaker Op. 5570T90
Front tweeter defectiveRepair and/or replace the loudspeaker Op. 5570T92
Rear side speaker defectiveRepair and/or replace the loudspeaker Op. 5570T97
5CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsReplace the additional amplifier equalizer Replace the additional amplifier equalizer Replace the additional amplifier equalizer Op. 5570T95