LG MG210 Service Manual page 88

Checking FEM & Mobile SW (1) (Tx pass continued)
Checking Points
Check ANT_SW1, ANT_SW2, ANT_SW3 of FL400
Check RF Level FL500 Pin 10,12
≥
20dBm
Yes
GSM850/900(TX 1GHz)
ANT_SW1 : H
ANT_SW2 : L
ANT_SW1 : L
Yes
Check FL400 Pin 1
≥
20dBm
Yes
Check SW500 Pin 1,2 with
no RF cable connected
Short ?
Yes
Check SW400 Pin 1,2 with
RF cable connected
Open ?
Yes
FEM & Mobile SW is OK.
Change the board
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4. TROUBLE SHOOTING
Tx standalone mode is needed
(Table 2-1)
No
Replace U400
No
Replace
the board
No
Replace
FL400
No
Replace
SW400
No
Replace
SW400