LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 92 -
Logic Table of the Antenna Switch
Checking Switch Block power source
Check Soldering of
ANT_SEL0, 1, 2 High Level
2.5V < Voltgae < 3.0V
Check VCC
TP1 VREG_RFRX_0_2.85V
Check the Logic
in each mode
YES
NO
Mode
ANT_SEL0
ANT_SEL1
ANT_SEL2
EGSM TX
High
Low
Low
EGSM RX
Low
Low
Low
DCS/PCS TX
Low
High
High
DCS RX
Low
Low
High
PCS RX
Low
High
Low
UMTS
Low
Low
Low
Содержание KS10
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