Checking Switch Block Power Source
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4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
ANT_SEL0
ANT_SEL1
ANT_SEL2
ANT_SEL3
GSM 850/EGSM TX
HIGH
HIGH
LOW
LOW
PCN/PCS TX
HIGH
LOW
LOW
LOW
WB850
LOW
LOW
HIGH
HIGH
WB1900
LOW
HIGH
LOW
HIGH
WB2100
LOW
LOW
LOW
HIGH
GSM 850 RX
LOW
HIGH
HIGH
LOW
EGSM TX
LOW
LOW
HIGH
LOW
PCN RX
LOW
HIGH
LOW
LOW
PCS RX
LOW
LOW
LOW
LOW
Antenna Switch Module Logic
Check the
TP1(VREG_SYNTH)
Check ANT_SEL 0, 1, 2
Hight Level
1.2V<Voltage<7V
Check the Logic
In each mode
Summary of Contents for CT815
Page 1: ...Date May 2009 Issue 1 0 Service Manual Model CT815 Service Manual CT815 Internal Use Only ...
Page 221: ...Note ...
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