LG S5000 Service Manual page 71

4. TROUBLE SHOOTING
Checking Flow
SETTING : Enter the engineering mode, and set vibrator on at vibration of BB test menu
START
Is the voltage at pin 3
of Q301 high ?
YES
Is the voltage at pin 2
of Q301 low ?
YES
Is the voltage at pin 1
of Q301 high ?
YES
Check the soldering
of CN601 ?
Check the soldering
of vibrator ?
Replace vrbrator
Vibrator
Working well !
NO
NO
NO
NO
YES
NO
YES
YES
Check the soldering
of R352, R353
YES
Check the soldering
of R350
YES
Check the soldering
of R351
YES
Replace Q301
Resolder CN601
Resolder vibrator
- 72 -
NO
Resolder R352, R353
NO
Resolder R350
NO
Resolder R351