LG KP105 - Page 73

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4. TROUBLE SHOOTING
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Only for training and service purposes
Checking Flow
Turn on the sound
Check the voltage level
of TP1 = Vbat?
No
Check
The battery
Yes
Check the Signal,
TP2, TP3
Yes
No
Check
U103
Check the Level of
TP4 = High ?
No
Check
U103
Check the Contact
Of Speaker
Yes
No
Re-Assemble
or Re-place
Speaker
Try again
or Change the Board
Yes
Re-solder
L201,L202
Check the Signal,
TP5, TP6
Yes
No