LG GX200 - Page 121

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4.20.3 Checking Flow
Re-work or change
CPU (U401) and try
again
Re-work or change
BT (U301) and try
again
Check theVoltage on
C302.1(TP3) and
B313.2(TP4) (1.8±0.2V) of
Voltage is OK?
Check C302.1(TP3),
C309.1(TP5) 32MHz clock is
OK?
NO
YES
NO
YES
NO
YES
Re-work or change
CPU (U401) and try
again
Check C307.1(TP6) 32KHz
clock is OK?
NO
YES
Re-soldering or
change X301 and try
again
Check theVoltage on
B303.2(TP1) and
B302.1(TP2) (2.8±0.2V) of
Voltage is OK?
YES
Re-work or change
FL301 and try again
Check FL301.4(TP8) is OK
( TX power ) by spectrum ?
NO
Re-work or change
CPU (U401) and try
again
Check R301.2(TP6) reset
signal
is (high reset) OK?
NO
YES
Bluetooth function
will operate
properly
Start
Check the BT antenna
contact is work well?
YES
Change BT atetnna
and try again
NO