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LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.16 Checking VCXO Block
The reference frequency (26MHz) from U103(GSM Transceiver RF3000) is used WCDMA TX part and
BB part. Therefore, 3 test points in the following figure should be checked.
Main board : bottom side
Phone
Oscilloscope
Notebook to send
TP command
Connection for Checking VCXO Block
WCDMA
Transceiver
(RF3100)
GSM
Transceiver
(RF3000)
Digital Base Band
(DB3100)
U103
U204
U301
X101
Crystal
Z3X-BOX.COM
Содержание KT520
Страница 231: ...Note Z 3 X B O X C O M ...
Страница 232: ...Note Z 3 X B O X C O M ...