LG KP105 - Page 80

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