Lenovo i909 Руководство по техническому обслуживанию - Страница 22
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I908 Mobile Phone Maintenance Manual
4.2.2 Rx path loss
Problem：Rx path loss calibration failed.
Causes: RF test cable is not connected properly during calibration; Pseudo soldering with
assemblies on the receiver channel, such as the antenna connector, antenna switch, saw
filter and the surrounding peripheral capacitors.
Solution:
Did
GSM
Re-sold
Y
er L2101
Y
Check the Saw
Re-solder
filter
or replace
for
N
Y
Check
Replace
C2128,C2129 and
and
L2112 f
N
Please note: Calibration usually has to be repeated after the assembly (assemblies) has
(have) been replaced.
4.2.3 PCL
Problem1
N
Check the calibration
report
N
Check
the
L2110
N
Y
Check
Saw
filter
(Z2102)
N
Check C2107,
(Z2101)
C2130
pseudo
L2111
d
Check
the
Rx path loss
calibration
and
see
Y
Re-sold
er L2110
Y
the
for
Y
Re-solder
or replace
and
for
N
Page 22
LENOVO
Y
Check whether or
not the RF wire and
Y
Check for pseudo
soldering at the
N
Check C2108 and the
antenna
switch
N
Re-conne
ct
and
Y
Re-sold
er U2105
Y
Re-sold
er C2108