LG -MC2670 Service Manual page 27

LG-MC2670
2.2.4 Check RFT6100 Circuit
Test Point
U105 Pin12
(TX_CP)
U105 Pin23
(CELL_OUT)
Circuit Flow
Check C169,C170
Check U105 Pin12
Check U105 Pin23
NO
I,Q Level is Appear?
YES
NO
Level (near 1V) is Appear?
YES
NO
Output signal
CELL is Appear?
YES
Control Signal is OK
See next page to check
PAM Circuit
24
C169,C170
(TX_I, Q)
Check U201
Replace U105
Replace U105