LG ID2750 Service Manual page 30

4.1.2 Checking Regulator Circuit
Test Point
U400. 31 (+2.6V_RX)
Circuit Diagram
Checking Flow
Check Pin 31
of U400
U400. 7 High
No
+2.6V_Rx OK?
PMIC Circuit is OK See
next Page to check
VCTCXO
Figure 4-2
Check Pin 7
of U400
No
Pin 7. High?
Replace U400
Changing Board