Earphone Trouble - LG W3000 Service Manual

4. TROUBLE SHOOTING

10) Earphone Trouble

SETTING : After Initialize Agilent 8960, Test in EGSM, DCS Mode
START
PIF Power On, Test
after Call 112
Inset the earphone to the phone
Does the audio profile
of the phone change to the
earphone mode?
Audio path problem
Yes
Set the audio part of the
test equipment to echo mode.
4
Can you hear your
voice from the earphone?
Yes
Earphone will work propely
1
Voltage at R307 = 0V ?
Yes
4
Earphone detect problem
No
Change the earphone and try again.
Can you hear your voice
from the earphone?
Yes
Change Earphone.
Earphone detect
problem
No
No
Set the audio part of the test
No equipment to PRBS or continuous
Can you hear your voice
from the earphone?
Earphone sending
path problem
Check if between
pin 3 and pin 4 of J301
is open ?
Resolder R307.
- 68 -
1
wave mode.
No
Yes
3
No
Change the J301.
Earphone receiving
path problem
2