LG D690 - Page 23

3. TROUBLE SHOOTING
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Only for training and service purposes
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LGE Internal Use Only
1.GSM QUAD TX PATH
2. GSM QUADRX PATH
4.3 Checking XO Block
The output frequency (26MHz) of XO (X4100) is used as the reference one of WTR2605 and PM8226
internal VCO.