LG -E450 Service Manual page 81

4.2.2.2 Checking MT6162 XO circuit
LGE Internal Use Only
START
Check TP1(C122)
Is it 26MHz?
No
Replace U801 and
then check TP1(C122)
Is it similar ?
No
Replace Main B/D
Yes
XO circuit is Ok. See next page
to check RF signal path
Yes
XO circuit is Ok. See next page
to check RF signal path.
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4. TROUBLE SHOOTING
Only for training and service purposes