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6. BLOCK DIAGRAM
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Main RF signal
Control signal
Main RF signal
Description
Comment
GSM 900 TX
GSM 900 TX RF Signal
DCS TX
DCS TX RF Signal
PCS TX
PCS TX RF Signal
UMTS2100 TX
UMTS2100 TX RF Signal
GSM 900 RX
GSM 900 RX RF Signal
DCS RX
DCS RX RF Signal
PCS RX
PCS RX RF Signal
UMTS2100 RX
UMTS2100 RX RF Signal
TX_I/Q
I/Q for Tx of RF
RX_I/Q
I/Q for Rx of RF
Control signal
Description
Comment
UMTS PA_CTL signal
PA_R0 UMTS Tx High/Low Power Control
GSM PA_CTL signal
GSM_PA_BAND DCS or PCS /GSM Mode Selection
GSM_PA_EN Power Amp Gain Control Enable
GSM_PA_RAMP Power
Amp
Gain
Control
ANT_SEL 0,1 Ant Switch Module Mode Selection
UMTS,
GSM900Tx/Rx,
DCS Tx/Rx,
PCS Tx/Rx
Summary of Contents for U370
Page 1: ...Date January 2008 Issue 1 0 Service Manual Model U370 Service Manual U370 ...
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