Service Manuals, User Guides, Schematic Diagrams or docs for : siemens Mobile Phone BENQ-SIEMENS EL71 BENQ-SIEMENS EL71 3
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IQ Demodulator
EL71 RF Diagram I Channel
GSM LNA
BATT+
1 2
internal antenna external antenna
2 2
VDD_RF1
mechanical
IQ Demodulator 1/2
DC autocalibration VDD_RF2
antenna
antenna DCS LNA
matching
switch Q Channel
1 RF_BAND_SW
2
2
FEM RF_FE_CTR_GSM
Hitachi
RF_FE_CTR_DCS
HWXQ411/413
PCS LNA 26MHz
to Power Asic PM_SIN26M
26MHz
2
26MHz
BB_SIN26M
to Baseband
26MHz integr. 26MHz integr.
RF VCO IF VCO
2 RF PLL 3476-3980MHz IF PLL 640-656MHz 26MHz
to Bluetooth
PF_SIN26M
CP PFD R CP PFD R 26MHz
1 1
VCXO
2 D D
1 1 RF_AFC
postfilter postfilter
RF_FE_CTR_GSM
GSM 1/4 26MHz
XCS 1/2 Crystal
RF_FE_CTR_DCS 1/2
external external
TVCXO
RF loopfilter IF loopfilter
RF_BAND_SW
Baseband
TXLO State
TX_ON
BATT+
RF_STR
machine
1/2 RF_DAT
PA PARAMP
Serial RF_CLK
Agilent LDO Interface
Sub loop
QCPM8861 down converter
RF_QX
RF_Q
850/900 MHz
DIRCOUPLER RF_I
integr.
IQ Modulator RF_IX
TXVCOs PM Detectors
DIRCOUPLER
DPD 1 2
APD
1800/1900 MHz postfilter GMSK
external EDGE
PM loopfilter
AM Detectors
VIC
postfilter
VID
external
AM loopfilter
RF_RAMP1
Gain controller
TXLO
ATT
& Transceiver IC
Combiner ATT Renesas HD155153
50R Main loop
down converter
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