LG KG270 Service Manual page 48

RX Trouble
TEST POINT
SW400
Pin 4
U400
CHECKING FLOW
FL400
Pin 6
FL401
U102
* FL401 6,7 and 8,9 output are
balanced
- 49 -
4. TROUBLE SHOOTING
Check Pin 1, 2 of
SW400
with RF Cable
Signal is
OK ?
Yes
Check Pin 4,6 of
FL400 ?
Yes
Check Pin 6,7 and 8,9 of
FL401 ?
Yes
Mobile SW & ASM is OK.
See next page
N
Replace
o
Mobile SW
(SW400)
N
o
Replace ASM
(FL400)
N
o
Replace SAW
Filter (FL401)