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Only for training and service purposes
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4. TROUBLE SHOOTING
4.17 Checking VCXO Block
The reference frequency (26MHz) from U110 (GSM/WCDMA Transceiver RF3300) on Main
board can be measured by using Oscilloscope and performing TP command in computer.
Phone
Oscilloscope
Notebook to send
TP command
Figure 4-8. Connection for Checking VCXO Block
X101
Crystal
Figure 4-7. VCXO block
GSM/WCDMA
Transceiver
(RF3300)
U110