Trouble Shooting Guide, Standard
4/00021-2/FEA 209 544/19 E 14(29)
4.3 Microphone out of order
Replace the flip and try again.
Open the phone and check for liquid damage.
Make sure:
• X830 is not mechanically damaged or incorrectly soldered.
• The microphone cable is not mechanical damaged and check specially the connectors.
• The microphone cable is correctly connected to X830 and the flip.
If the fault remains, measure the resistances of R814 (0 ohm), R812, R817, R819 (1 kohm)
and R818 (20 kohms).
If all the resistances are correct, replace C818 and C819.
If the fault remains, send the unit on according to the local company directives.
4.4 Hands free microphone out of order
The fault arises when the audio path is interrupted somewhere between the hands free
microphone (connected through the system connector) and the input of N800. The audio path
is shown in Fig.4.1.
Fig. 4.1
Open the phone and check for liquid damage, especially around the system connector.
Make sure the system connector is not damaged or incorrectly soldered.
Make sure all the components in Fig. 4.1 (R814, R825, R802, R803, R805, R850, C810,
C812, C817, C835 and C850) are mounted at the circuit board.
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