Samsung SGH-2400, Service Manual, Page: 31 / 41

5-7 Schematic Diagrams
5-7 Base Band Block
RS232_RTS
MIC2N
RD
RXCLK
IRXP
D(0:15)
VMID
DEMODEN
BANDSEL
ITX1
KEYBOARD_COL(0:4)
KIRX
RS232_RXD
RXRDY
RXSFM
SP
SPK2N
REFADCP
MIC2P
RS232_CTS
BAT_VSET
SIMALIM
RXRDY
MIC2N
KQRX1
TXCLK
DCIN
DCSTX2
SPK2P
TXDATA
TXSFM
CLK13M_K
SIM_5V3V
AVCC
MIC-
+3VBB
KQRX
SPK2P
+VBATT
VAGC
LCD_A2
BFI
CHRG_CURRENT
SCL
ON_OFF
LCD_WR
MIC-
BAT_TYPE
WR
ANT
VF
LCD_EN D(0:15)
KEYBOARD_COL(0:4)
RD
RXSFM
DCVOLT
SDA
RXEN_FEGSM
SIMCLK SIMDATA
MIC+
SIM_5V3V
REED
STARTUP_VOLTS
+3V_RTC
A(0:20)
SIMDATA SIMRST
_RTC_INT
BAT_VOLT
BBFILTEN
BFI BOOT
MIC+
CSRAM
MIC2P
CSVOC CS_FLASH2
A(0:20)
QRXP
KIRX1
DCSTX1
VF
GSMTX1 GSMTX2
KEYBOARD_ROW(0:4)
REFADCP
KQRX
_RESET
LCD_A2 LCD_WR
BOOT
CF
DCVOLT
AVCC
REFTXN REFTXP
RF_ON_OFF
RI_LIGHT
WR
TXRDY
RXDATA
ITX
+VBATT
SPK2N
RXCLK
BACKLIGHT
RXEN_FE
CHK_BAT
QTX
DCIN
WR
MAX_VOLT CF
POWER_ON
TXEN2
SIMRST
BAT_TYPE
ON_OFF
SYNCLK
RI_LIGHT
SYNEN
_RESET
AFC
+VBATT
BACKLIGHT
RXEN_FE
CSRAM
uP_ON_OFF
TXCLK TXDATA
TXEN1
CSVOC
D(0:15)
MAX_VOLT
CLK13M
BAT_VOLT
CSROM RS232_RTS
BBFILTEN
TXPOWER
TXRDY
REFTXN
RXDATA
BANDSEL
+VBATT
CSROM
REFADCN
RD
KIRX1
REFTXP
KQRX1
RXEN_FEDCS
_BANDSEL
CLK13M_K TXSFM
BAT_VSET
+3VBB
RS232_RXD RS232_TXD
+VBATT
AVCC
+VBATT
RS232_TXD
SCL
SDA
CS_FLASH2
KEYBOARD_ROW(0:4)
REED
REFADCN
TXEN1
CHRG_CURRENT
LCD_EN
RTC_ON_OFF
SIMCLK
AVCC
A(0:20)
CHG_ON
TEMPERATURE
KIRX
+3VBB
SP RS232_CTS
SYNDATA
TXEN2
+3VBB
SIMALIM
RTC_ON_OFF
CHG_ON
STARTUP_VOLTS
D(0:15)
TEMPERATURE
QTX1
_RTC_INT
_RESET
uP_ON_OFF
CHK_BAT