Only For Training And Service Purposes - LG KG280 Service Manual

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 Q300 high ?
YES
Is the voltage at pin 2
of Q300 low ?
YES
Is the voltage at pin 1
of Q300 high ?
YES
Check the soldering
of vibrator ?
Replace vrbrator
Vibrator
Working well !
LGE Internal Use Only
NO
NO
NO
NO
YES
YES
- 58 -
Check the soldering
of R322, R324
YES
Resolder R322, R324
Check the soldering
of R318,R321
YES
Resolder R318,R321
Check the soldering
of R319,R320
YES
Resolder R319,R320
Replace Q300
Resolder vibrator
Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

NO
NO
NO