LG CG225 Service Manual page 89

4. TROUBLE SHOOTING
4.17.6 Checking FEM & Mobile SW (1) (Tx pass continued)
Check ANT_S W1, ANT_SW2 of FL501
ANT_SW1=Low & ANT_SW2=High or
ANT_SW1=High & ANT_SW2=High ?
Check RF Level FL501 Pin 10,12
20dBm
Yes
Yes
Check FL50 1 Pin 17
20dBm
Yes
Check S W501 Pin 1,2 wi th
no RF cabl e connected
Short ?
Yes
Check S W501 Pin 1,2 wi th
RF cabl e connected
Open ?
Yes
FEM & Mobile SW is OK.
Change t he board
Tx st andalone m ode is needed
(Tabl e 2-1)
No
Repl ace U501
No
No
Repl ace
No
Repl ace
No
Repl ace
- 88 -
Repl ace
the board
FL501
SW501
SW501