LG KE600 Service Manual - Page 107
Mobile SW, FEM Control Signals
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5. Trouble shooting Checking Flow Check Pin 1, 2 of SW601 with RF Cable No Signal is OK ? Yes Control signal Check (R601, R602, R603) of FL601? Yes Control Signal is No OK? Yes C614, C615, No C616, C617 Signal is normal ? Replace Mobile SW (SW601) Check PMB8876 (U101) Replace FEM (FL601) Yes Mobile SW & FEM is OK. See next page to check I/Q Signals. EGSM RX ANT_SW1 (R601) ANT_SW2 (R602) ANT_SW3 (R603) Figure 12 Mobile SW Figure 13 FEM Control Signals - 108 -
5. Trouble shooting
- 108 -
Checking Flow
Figure 12 Mobile SW
Figure 13 FEM Control Signals
EGSM RX
ANT_SW1
(R601)
ANT_SW2
(R602)
ANT_SW3
(R603)
Check Pin 1, 2 of SW601
with RF Cable
Signal is OK ?
Replace Mobile SW
(SW601)
Yes
No
Yes
Mobile SW & FEM is OK.
See next page to check I/Q
Signals.
Check PMB8876 (U101)
Control Signal is
OK?
No
Yes
Control signal Check (R601,
R602, R603) of FL601?
Replace FEM (FL601)
C614, C615,
C616, C617
Signal is
normal ?
No
Yes