Block Diagram - LG F1200 Service Manual

4. TROUBLE SHOOTING
Start
Earphone Sending Problem
The Voltage Level is
about 2V at C502?
YES
Audio signal
appears at C503?
YES
Change the Main-PCB
(7) Vibrator Trouble

Block Diagram

NO
NO
Change the Ear-phone
L300
100nH
C302
56p
MOTOR
R304
VIBRATOR
1.5K
- 50 -
Soldering status of
R500, R513 is OK?
YES
Change the Main-PCB
Soldering status of
C503 is OK?
YES
Soldering status of
CN500 is OK?
YES
D300
1SS302
L301
100nH
R303
15
R305
100K
NO
Resolder R500, R513
NO
Resolder C503
NO
Resolder CN500