Checking Vcxo Block - LG CF360 Service Manual

4. TROUBLE SHOOTING

4.16 Checking VCXO Block

The reference frequency (26MHz) from U107(Transceiver RF3300) is used
WCDMA TX part and BB part, Bluetooth part. Therefore, 3 test points in the following figure
should be checked.
Oscilloscope
LGE Internal Use Only
DB3200
Main board : bottom side
Phone
Connection for Checking VCXO Block
RF3300
Notebook to send
TP command
- 112 - Copyright © 2008 LG Electronics. Inc. All right reserved.
U301
Digital Base Band
X100
Crystal
U107
Transceiver
Only for training and service purposes