N142 Buzzing from one or more speakers

			Test results
1	COMPONENT CONCERNED	PRELIMINARY CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Amplifier	Switch the radio on with CD source and volume 0; check if the buzzing is heard	End of diagnosis	The buzzing continues	Go to Step 2
2	COMPONENT CONCERNED	AMPLIFIER WIRING CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Amplifier wiring	Hold the wiring next to the connector and slightly press in the direction opposite to the fitting one for connector into amplifier (as you wished to take it out from its seat) and then perpendicularly.	Go to Step 3	Amplifier wiring or connection fault	Restore the correct connections and the amplifier wiring
3	COMPONENT CONCERNED	CHECK AMPLIFIER OPERATION	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Amplifier	Check that the amplifier is working correctly	Go to Step 4	The amplifier is not working correctly	Replace the amplifier Op. 5580T42 BOSE SOUND SYSTEM AMPLIFIER - R.R.
4	COMPONENT CONCERNED	RADIO OPERATION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Radio	Check that the radio is operating correctly	End of diagnosis	The radio is not working correctly	Replace the radio Op. 5570T80 CAR RADIO EQUIPMENT - R+R