Samsung SGH-A500 Service Manual page 13

4 . S G H - A 5 0 0 B l o c k D i a g r a m
MOTOR
VBAT
MOTOR_EN
RTCOUTIF32KX
E-GOLD+(PMB2880)
Speech&
EPP1 2
Channel
EPN1
DAC Decoding
EPP2
SPEAKER
HR/FR/EFR
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
XTAL
32.768kHz
F13M
VRF2 TEMP
F32K RTCOUT
Clock
Osc Generation
32.768kHz
OAK+
ADC
Equalizer
ADC
Viterbi
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)
vcc
VRF2
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
CHG
I2C bus
control charge
interface
control
SCL SDA VCXOEN ON
4- 1
LMC33-07A0524A
DCS RX SAW
FILTER
RX-IRM
GSM1800 RX2 DCS_RX
LNA1800
(1805~1880MHz)
GNDLNA
SAFSE1G84KA0T00R1S
RX-IRM
RX1
GSM900
LNA900 GSM RX SAW
RX1X
FILTER
(935~960MHz)
SAFSD942MCM0T00R1S
RX3
RX3X
VCC6
LO-Buffer
MIXI
TX_POWER
TIC_FD
TX-Mixer MIXIX
PFD
LNAON
VCC2
CPTX
VTIC_OUT
Tx½Ã
SMARTI+ GSM Band (1314~1339MHz)
DCS Band (1286~1361MHz)
Rx½Ã
GSM Band (1295~1320MHz)
DCS Band (1445~1520MHz)
MQE959A1G32
RF_OUT
Rx VCO
BSEL
VTUNE
loop filter
100nF
SW FB VSSPW VDDA VINT VANA V3V VRTCVSIM VDDRF VRF1VRF2 VSSA BYP IREF VSSR
SDBB
Reference
(step-
down)
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
ANTENNA
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
GSM
COUPLER
HBT
GSM_RX
CMOS
coupling °ª
GSM : -19dB
DCS : -14dB
HBT
ATTENUATER
-7dB
APC
VS2
PCF5079HK
VCG
_VINT
APC IC
VRF1
TXONPA
ATTENUATER ATTENUATER
-1dB -1dB
GSM Band
(890~915MHz)
DCS Band
out2(DCS)
(1710~1785MHz)
out1(GSM)
supply
ATTENUATER Tx VCO
-6dB
save select
control
VOF1748c28DKB
VRF1
TXONPA
154k