Trouble Shooting Guide, Standard
4/00021-2/FEA 209 544/21 B 12(26)
4 Audio Problems
4.1 Type of problem
Connect a call from the phone that is to be tested (later referred to as the phone) to a fully
functional phone (later referred to as the reference phone).
Check that the microphone and the earphone of the phone works correctly.
If the phone sounds strange (there is noise, distortion or the sound is “chopped”), send the
unit on according to the local company directives
Connect a handsfree unit to the system connector of the phone.
Check the functionality of the handsfree by first speaking into the reference phone while
listening to the handsfree speaker and then speaking into the handsfree microphone while
listening to the earphone of the reference phone.
If it is only the earphone, of the phone, that has little or no sound, go to section 4.2.
If both the handsfree speaker and the earphone of the phone are out of order, send the unit on
according to the local company directives
If the sensitivity of the microphone is low (no or poor sound in the reference phone), go to
section 4.3.
If both the handsfree microphone and the microphone of the phone are out of order, send the
unit on according to the local company directives
If both the earphone and the microphone of the examined phone are out of order, send the unit
on according to the local company directives
If the handsfree microphone does not work, go to section 4.4.
If the handsfree speaker is out of order, go to section 4.5.
If both the speaker and the microphone, of the handsfree, are out of order, go to section 4.6.
4.2 Earphone out of order
Open the phone and check for liquid damage.
Replace the earphone. Test the phone again.
If the fault remains, make sure that the X831 and X832 connectors are not mechanically
damaged or incorrectly soldered.
If the fault remains, send the unit on according to the local company directives.
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