Trouble Shooting Guide, Standard
4/00021-2/FEA 209 544/31 B
11(23)
4 Audio Problems
4.1
Type of fault
Connect a call from the phone that is to be tested to a reference phone.
Check the function of the microphone and the earphone.
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. Do this 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 there is little or no sound in the earphone of the phone, go to section 4.2.
•
If neither the handsfree speaker nor the earphone of the phone works, send the unit on
according to the local company directives.
•
If the sensitivity of the microphone is poor (little or no sound in the reference phone), go
to section 4.3.
•
If neither the handsfree microphone nor the microphone of the phone works, send the unit
on according to the local company directives.
•
If neither the earphone nor the microphone of the phone works, 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 does not work, go to section 4.5.
•
If neither the handsfree speaker nor the handsfree microphone works, go to section 4.6.
4.2
Earphone does not work
Open the phone and check for liquid damage.
Make sure that the X810 and X811 connectors are not mechanically damaged or incorrectly
soldered.
Replace the earphone. Test the phone again.
If the fault remains, send the unit on according to the local company directives.
4.3
Microphone does not work
Open the phone and check for liquid damage.
Check that the microphone contact surface on the board is clean. Replace the microphone
rubber gasket and the microphone.
Assemble the phone and test the microphone again.
