LG T5100 Service Manual page 69

3. BASEBAND PART TROUBLE SHOOTING
IrDA Trouble
START
Execute PCSync program
NO
Resolder the R416
The power is supplied to U402?
YES
NO
The soldering of U402 is OK? Resolder the U402
YES
NO
The signal "TX _IrD A, R X_ Ir D A"
Change the U402
are measured?
YES
The DBB is broken.
Change the board.
Phone
Illumination
PC
Cone
30 Cm
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