LG GX200 - Page 131

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4.22.3 Checking Flow
Start
Check the GMS antenna
contact is work well?
YES
Change GSM
atetnna and try
again
NO
Re-work or change
RFJ101 and try
again
NO
Check the RFJ101 output by spectrum :
BAND:850 ARFCN:190
BAND:900 ARFCN:40
BAND:1800 ARFCN:700
BAND:1900 ARFCN:660
YES
Check BAND:850 , L103.2(TP1)
BAND:900, L104.2 (TP2)
BAND:1800 , L105.2 (TP3)
BAND:1900 , L106.2 (TP4)
input status ?
Check R108 .2(TP5)
signal is OK ?
NO NO
Re-work or change
U401 and try again
Re-work or change
U101 and try again
YES
YES
Check BAND:850, C116.2(TP6)
BAND:900, C116.2 (TP6)
BAND:1800 , C120.2(TP7)
BAND:1900 , C120.2 (TP7)
output status ?
Check
B202.1(TP8),R105 .2(TP9)
on ( 2.8±0.2V) of Voltage
is OK ?
NO
NO
Re-work or change
U202 and try again
Re-work or change
U201 and try again
YES
Check X201 output ?
Re-work or change
X201 and try again
NO
YES
YES
GSM functiom work
properly
Download SW
or Re-calibration