Lenovo A328 Service Manual page 37

LENOVO
3-2-2.GSM/DCS TX Part
Troubleshooting flow chart
Main related component:
（X101),RF-TR(U106),RF-PA（U102）
GSM/DCS/PCS TX does not work
YES
Check antenna matching
component OK?
YES
YES
Check antenna matching
component OK?
YES
Check RF-PA soldered status ok?
YES
Check TR working voltage
nominal 2.8V
YES
Check the RF-TX path component Are the
component in place and of correct
value/type ?
RF Circuit
RF-PA circuit
BBIC(U108) ，
Check TX circuit
component visually
NO
NO
Trim or replace antenna
NO
Soldered again or replace
component is TX working now?
NO
NO
Soldered again or replace component
NO
Check BBIC Soldered again or
NO
Replace damaged missing
component
YES
Check BBIC & TR and PA Soldered
again or replace
XTAL CRYSTAL
Soldered again or
replace
YES
YES
replace
YES
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