Lenovo A859 Servicehandleiding - Pagina 32
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Repair Manual of Lenovo S920 Mobile Phone
Check whether RF cable and fixtures are
well connected?
Whether Rf connector CON2101，Tx module
U2201 and the surrounding circuit devices are
in cold solder joint？
Whether
U2102 is oppositely pasted
or in cold solder joint?
Whether
U2201
WCDMA
channel passes is in cold
solder joint?
TPC
Y
N
Y
N
WCDMA
PA
Y
Re-weld
N
the
duplexer
Y
through
which
Re-weld
transmission
32
Reconnect and
calibration
Re-weld