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3.2.4 Check RFT6122 Circuit
Test Point
Circuit Flow
NO
Check U201
Check C174,C175
I,Q Level is Appear?
U106 Pin23
YES
CELL_OUT
NO
Check U106 Pin12
Level (near 1V) is Appear?
Replace U106
C174,C175
I Q DATA
YES
NO
Output signal
Check U106 Pin23
Replace U106
U106 Pin12
(837MHz) is Appear?
TX_CP
YES
Control Signal is OK
See next page to check
PAM Circuit
Circuit Diagram
Waveform
U106 Pin23 CELL_OUT
C174,C175 TX_I,Q DATA
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