CDMA RF reception failure
Check whether the RF
connection cable is
normal and whether the
antenna spring is in
good contact
End
Rectify transmission
exceptions in the
preceding transmitter
Replace U3901, U3802,
Z3801, and J3802 in
sequence
End
End
Yes
Yes
No
No
Yes
Yes
No
No
Yes
Yes
No
No
Replace the modem U300
Yes
Is the failure
rectified after the related circuit
is replaced?
Is the failure
rectified after the software
is updated to the latest
version?
Spot-check
the RF signals received
before U3301 based on the non-signaling
transmission of the frequency band. Are
the signals
normal?
Is CDMA
transmission normal?
Are the RF
signals received after U3301
normal?
Are the
wired specifications
normal?
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