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8. Level 3 Repair
NORMAL CONDITION
Catch the channel?
Check soldering status(U22000) and
the voltage at
C22045,C22021,C22001=0.8V,
C22028=0.875V,
C22019,C22008=1.7V,
C22043,C22031=1.2V,
C22042=1.8V
8-4-42. LTE B7/38/41 TX
No
Yes
Check C21089
≤ -65dBm
Check the ANT
No
Check C21023
≤-65dBm
Yes
Resolder or change
L21091, C21089, C21023
No
Check L21035
≤-65dBm
≤-65dBm
Yes
Resolder or change
F21002, C21079, L21024, L21033
No
Check component
soldering status ok?
U21003
Resolder or change
U21003
No
No
Yes
Check C21027
≤-65dBm
Resolder or change
C21027, L21036, L21037
Receiver is OK?
Resolder or change
UCP500
No
Yes
Yes
Resolder or change
U22000
No
END
Yes
