Speaker Trouble - LG T5100 Service Manual

3. BASEBAND PART TROUBLE SHOOTING

Speaker Trouble

START
Does sine wave appear
at C306, C315?
YES
Does sine wave appears
at TP303, TP304 ?
YES
Does sine wave appears
at R334, R335?
YES
Does sine wave appears
at R333 ?
YES
Does sine wave appears
at R340, R341 ?
YES
Connection between
FPCB and board is OK?
YES
FPCB is out of order.
Change the Camera Module.
Enter into engineering mode
and go to menu[Baseband alert
NO
U300 is out of order.
Change the Board.
U301 is out of order.
NO
Change the Board.
U707 is out of order.
NO
Change the Board.
R333,R334,C332 are out of order
NO
Change the R333,R334,C332.
U302 is out of order.
NO
Change the Board.
NO
Reconnect FPCB
- 50 -
ring