LG L1150 Service Manual page 94

1. Check Ant. SW(FL801) and Triple Buffer(U801)
VC1
– Check input signals(VC1, VC2, VC3) of the Triple buffer.
– Check Ant. SW control signals (Outputs of the Triple buffer ).
GSM_RX
DCS_RX
PCS_RX
GSM_TX
DCS/PCS_TX
– If Ant. Control Signals are differ to above logic table, change U801.
VC2
U801 FL801
VC3
VC_GSM
L
L
H
L
H
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4. TROUBLE SHOOTING
VC_GSM850 VC_GSM1800/1900
L
L
L
L
H
L
L
L
H
L