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Only for training and service purposes
4. TROUBLE SHOOTING
4.17 Checking VCXO Block
The reference frequency (26MHz) from U111(Transceiver RF3300) is used
WCDMA TX part and BB part, Bluetooth part. Therefore, 3 test points in the following figure should be
checked.
Phone
Oscilloscope
Notebook to send
TP command
Connection for Checking VCXO Block
Main board : bottom side
U111
Transceiver
U201
Digital Base Band
X100
Crystal
DB3200
RF3300
Main board : Top side
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