LG KG330 Service Manual page 45

4. TROUBLE SHOOTING
Vibrator Trouble (3)
START
Replace
No
Is the voltage at pin 1
MIDI(U503)
of R501 high?
Yes
No
Check the soldering
Replace U501
of U501
Yes
No
Check the contact state
Change the main board
of CN502
Yes
No
Change the vibrator.
Check the vibrator
Yes
Replace Vibrator.
Vibrator will work properly
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