4. TROUBLE SHOOTING
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Only for training and service purposes
LGE Internal Use Only
CHECKING FLOW
START
When plug headset,
The profile changes to the
headset mode?
Check the voltage Level
of TP1 is around 1V?
Re-download
or Replace U205
Change another Headset
and Try again or Re-solder
CN202
Change another Headset
and Try again or Re-solder
CN202
Check the signal
Level at TP2 Is a few
hundreds mV AC?
Yes
Yes
Yes
No
No
No
Set the speech of the test
equipment to PRBS mode
and connect call
Set the speech of the test
equipment to echo mode
and connect call
Change another Headset
and Try again or Re-solder
CN202
Check the signal
Level at TP3 Is a few
tens mV AC?
Yes
No
Earphone
working well !
SETTING : After initialize Agilent 8960, Test EGSM900, DCS mode ( or GSM850, PCS mode )