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4.2.4 Check RFT6100 Circuit
Test Point
U103 Pin23
(CELL_OUT)
C158,C159
(TX_I, Q)
Circuit Flow
Check C158,C159
Check U103 Pin12
Check U103 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
U103 Pin12
(TX_CP)
Check U201
Replace U103
Replace U103
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