LG KP105 Service Manual page 80

Checking Flow
Check a condition of FM tuner Matching
Check a condition of Power supply
; Reasonable range (3.1V > TP1,2,3,9 > 2.7V)
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Only for training and service purposes
Check a condition of
Ear_jack_connector
soldering(CN301)
A condition is
Good?
Yes
components (TP4,5,6,7)
A condition is
Yes
good?
Yes
No
points(TP1,2,3)
A condition is
good?
Yes
Check a condition of CLK
(TP8-32k)
A condition is
good?
Yes
Check a condition of
U202 soldering
A condition is
good?
Yes
Check a condition of
TP10, U203 soldering
Check a condition of FM_radio
Performance
Yes
Finish
4. TROUBLE SHOOTING
No
Replace CN301
No
Give the additory solder in
TP4,5,6,7
FM_Radio
Working is good?
No
Replace Main PCB Board
No
Replace Board
No
Replace U202
Give the additory solder in
TP10, U203
No
Replace Board
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