LG CU920 - VCTCXO Block Troubleshooting Guide

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4. TROUBLE SHOOTING
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Only for training and service purposes
C
Check soldering
and components
heck C715 of PMIC (U701)
Check R208 of MSM (U200)
C
VCC ≥ 2.8V
Check TP2
TRK_LO_ADJ
Check TP3,4,6
With Oscilloscope
CXO is OK
Check other part
2V ≥ Voltage ≥ 1V
2V ≥ Voltage ≥ 1V
heck TP1
VCC of TCX
O
YES
YES
YES
YES
NO
NO
NO
Fig. 4.5.4 Test Point of the TCXO Block