Samsung SGH-X460 Service Manual

Also see for SGH-X460: Manual

Contents

SAMSUNG Proprietary-Contents may change without notice3. Clock GeneratorThe Clock Generator (CG) generates all clocks for internal and external usage. The 32768 Hzcrystal oscillator provides an accurate low clock frequency for the PCF50601 and other circuitry.B. Connector1. LCD ConnectorLCD is consisted of main LCD(color 65K UFB LCD) and small LCD(B/W). Chip selectsignals, LCD_MAIN_CS and LCD_SUB_CS, can enable Each LCD. Backlight signal enableswhite LED of main LCD and small LCD. "RESET_2V8" signal initiates the Reset process ofthe LCD.16-bit data lines(HD(0)~HD(15)) transfers data and commands to LCD through by passcapacitor."SPK_P" and "SPK_N" from OM6357 are used for audio speaker. And "VDD_VIB" fromPCF50601 enables the motor.2. KeyThis is consisted of key interface pins among OM6357, KBIO(0:7). These signals compose thematrix. Result of matrix informs the key status to key interface in the OM6357. Power on/offkey is separated from the matrix. So power on/off signal is connected with PCF50601 to enablePCF50601. twelve key LED use the "VBAT" supply voltage. "VDD_KEY" signal enablesLEDs with current control. "FLIP" informs the status of folder (open or closed) to the OM6357.This uses the hall effect IC, A3210ELH. A magnet under main LCD enables A3210ELH.3. EMI ESD FilterThis system uses the EMI ESD filter, EMIF09 to protect noise from IF CONNECTOR part.4. IF connetorIt is 24-pin connector. They are designed to use VBAT, V_EXT_CHARGE, TXD0, RXD0,RTS0, CTS0, JIG_REC, CHARGER_OK, RXD1, TXD1, AUX_MIC, AUX_SPK and GND.They connected to power supply IC, microprocessor and signal processor IC.