LG KE800 Service Manual page 53

4. Trouble Shooting
Checking Flow
Check a condition of Matching
components (C430, C420, L402)
Check a condition of Power supply
Check a condition of
Ear_jack_connector
A condition is
Good?
Yes
A condition is
Yes
good?
Yes
No
(R431-2.85V, C432-2.72V)
A condition is
good?
Yes
Check a condition of CLK
(C437-32k)
A condition is
good?
Yes
Check a condition of
U406 soldering
A condition is
good?
Yes
Replace Main board
change
Finish
No
Replace CN401
No
Give the additory solder in
C430, C420, L402
FM_Radio
Working is good?
No
Replace Main PCB Board
No
FM_Radio
Working is good?
No
Replace U407
No
Replace U406
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Yes
Yes
Yes
Yes