Samsung SGH-A500 Service Manual page 12

4. SGH-A500 Block Diagram
MOTOR
VBAT
MOTOR_EN
RTCOUTIF32KX
E-GOLD+(PMB2880)
Speech&
EPP1 2
Channel
EPN1
DAC Decoding
EPP2
SPEAKER
HR/FR/EFR
Viterbi
FLIP_SNS
FLIP IC HW Accelerator
VINT
Speech&
M Channel
MICP1
U ADC Encoding
MICP2 X
MIC.
HR/FR/EFR
DISP_RST
DISP_RS
JTAG/
DISP_CS
Debug
LCD
DISP_SCLK
DISP_SID
module
LED_CTL
VBAT
D0~D7
POLY_EN
POLY_CLK
EPP1
YAMAHA POLY_RST
EPN1
POLY_IRQ
CHIP
RDQ
WRQ
YMU759-QE2
A(1)
VBAT EP_INT
CCIO CCLK
EPP2 V3V
HEAD
SIM
SET
CARD
All manuals and user guides at all-guides.com
XTAL
32.768kHz
F13M
VRF2 TEMP
F32K RTCOUT
Clock
Osc Generation
32.768kHz
OAK+
ADC
Equalizer
ADC
A51/52
DAC
GMSK
Modulator
DAC
DAC
TX900_RX1800
Power
RTC
Mgmt. GSM TX1800_RX900
Scheduler TXONPA
PLLON
Control
RF Output
System Interface PAOUT
Power Control
EP_SCL
10bit DAC
EP_SDA
VCXOEN
C166CBC
VRTC
Keypad
Interface
VANA
FLASH_WR FLASH_SEL
D(0)~
CCRST A(0)~ KP0 VDD_SD
D(15)
A(22) ~KP9
10
VSIM VBAT
SRAM_
V3V BHEQ
WRQ SEL
RDQ RESETQ
MEMORY Keypad
F-RY_BY
LRS1380
POWER ON RTCOUT
SAMSUNG Proprietary-Contents may change without notice
IF SAW FILTER(360MHz)
VC-TCXO-208C
AFC VT
TCXO(13MHz)
VRF2 vcc
out
TFS360F
GND
TEMP
13MHz
VCXO
VCCVCXO
Div.
by
FSYS
13/26
BSW
BBPGC
PLLON
Div.
Rx-Demod
by 4
REFR
IF-
PLL
BBPGC
VCC4/5
A
VCO
RX-TX-LO2
Tx-mod
AX
Div.
by 4
B
BX
RF-
PLL
3-WIRE-BUS
GND
Modulator
Filter
(424 or 428MHz)
VBAT
AC
T1
adapter Rsence
INTOUT RESET VSSD VDDCH VCHC VCHS VBATS VDDPW SW
CHG SDBB
I2C bus
control charge (step-
interface
control down)
SCL SDA VCXOEN ON
4-1
ANTENNA
LMC33-07A0524A
DCS RX SAW
FILTER
RX-IRM
RX2
GSM1800 DCS_RX
LNA1800
(1805~1880MHz)
GNDLNA
GSM
SAFSE1G84KA0T00R1S
RX-IRM
GSM_RX
RX1
GSM900
LNA900 GSM RX SAW
RX1X
FILTER
(935~960MHz)
SAFSD942MCM0T00R1S
RX3
ATTENUATER
RX3X
PCF5079HK
VCC6
APC IC
LO-Buffer
MIXI
TX_POWER
TIC_FD
TX-Mixer MIXIX
PFD
LNAON
VCC2
CPTX
VTIC_OUT
Tx 시
SMARTI+ GSM Band (1314~1339MHz)
DCS Band (1286~1361MHz)
Rx 시
GSM Band (1295~1320MHz)
DCS Band (1445~1520MHz)
MQE959A1G32
RF_OUT
Rx VCO
BSEL
VTUNE
loop filter
100nF
154k
FB VSSPW VDDA VINT VANA V3V VRTCVSIM VDDRF VRF1VRF2 VSSA BYP IREF VSSR
Reference
E-POWER
Switchplexer Truth
Tx900_Rx1800 Tx1800_Rx900 Switchplexer State Table
VC1 VC2
H L EGSM_Tx L H
H H DCS_Rx L L
L H DCS_Tx H L
H H EGSM_Rx L L
L L NO R-Tx H H
RF SWITCH
vc1
RF switch
TX1800_RX900
control
vc2
logic
TX900_RX1800
DCS DCS_TX
VRF1
GSM_TX
CX77301
VBAT
COUPLER
HBT
CMOS
coupling 값
GSM : -19dB
DCS : -14dB
HBT
-7dB
APC
VS2
VCG
_VINT
VRF1
TXONPA
ATTENUATER ATTENUATER
-1dB -1dB
GSM Band
(890~915MHz)
DCS Band
out2(DCS)
(1710~1785MHz)
out1(GSM)
supply
Tx VCO
ATTENUATER
-6dB
save select
control
VOF1748c28DKB
VRF1
TXONPA