Samsung SGH-ZV30 Service Manual

Also see for SGH-ZV30: User guide

SAMSUNG Proprietary-Contents may change without notice2-2. Baseband Circuit description of SGH-ZV302-2-1. PM6650- Power ManagementTen low-dropout regulators designed specifically for GSM applications power the terminal and help ensureoptimal system performance and long battery life. It provides LDOs support for 1.375V, 1.8V, 2.6V,2.85V,3.3V.IC-level interfaces include the three-line serial bus interface(SBI) used by the MSM6250 device tocontrol and status the PM6650 IC.- TCXO Controller and BuffersThe PM6650 IC includes circuits for controlling the TCXO warm-up and buffering its signal for distributionthroughout the handset. Performance specifications are presented below.2-2-2. Connector- LCD ConnectorLCD is consisted of main LCD(color 262K TFT LCD) and small LCD(OLED color 65K LCD). Chip selectsignals in the U302, MAIN_LCD_CSB can enable main LCD and SUB_LCD_CSB can enable smallLCD.Dimming signal enables white LED of main LCD and Dimming Control. C_Main_LCD_RESETB signalinitiates the reset process of the main LCD. C_SUB_LCD_RESETB signal initiates the Reset process of thesmall LCD. 16-bit data lines(D2(0)~D(15)) transfers data and commands to LCD. Data and commands use"C_A2(1)" signal. If this signal is high, Inputs to LCD are commands. If it is low, Inputs to LCD are data.The signal which informs the input or output state to LCD, is required. But this system is not necessary thissignal. Power signals for LCD are "VBATT and VREG_MSMP". "EAR1OP" and "EAR1ON" are used for audiospeaker. And "MOTOR_EN" from U302 enables the motor.- KeyThis is consisted of key interface pins among U302, KEY_N(0:4). These signals compose the matrix.Result ofmatrix informs the key status to key interface in the U302. Power on/off key is seperated from the matrix.The key LED use the "VBATT" supply voltage. "KEY_LED_ON" signal enables LEDs with current control."HALL_SW" informs the status of folder (open or closed) to the. This uses the hall effect IC, EM1681- EMI ESD FilterThis system uses the EMI ESD filter, GMF05LC to protect noise from IF CONNECTOR part.- IF connectorIt is 24-pin connector. They are designed to use VBATT, CF, UART1_TX, UART1_RX, UART1_RFR,UART1_CTS, JIG_ON, RTCK, TCK, TDI, TDO, TMS and GND. They connected to power supplyIC,microprocessor and signal processor IC.2-2-3. AudioEAR1OP and EAR1ON from U302 are connected to the main Receiver. MIC1P and MIC1N are connected tothe main MIC. And MIC2P and MIC2N are connected to the Earphone. YMU769 has a built-in amplifier, andthus, is an ideal device for outputting sounds that are used by mobile phones in addition to game sounds andringing melodies that are replayed by a synthesizer.