LG GX200 - Page 60

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4.2.3 Checking Flow
SIM card will operate
properly
Start
Measure the SIM Card
supports 1.8V or 3.0V
Re-work or change
Change J802 SIM and
around component
Check SIM socket J802,is work
well
Re-work or change
Change J804 SIM socket
around component
Check SIM socket J804,is work
well
Re-soldering
or change CPU
(U401)
Check voltage
of TP1, TP2 ?
NO
YES
YES
NO
YES
YES
NO
NO
Change the SIM
Card. Our phone
supports only 1.8V or
3V SIM Card