Panasonic KX-TG2448BXF Service Manual

Contents

SPPCN331HEADSET_JACK1 GND2 MIC13 MIC24 SP25 SP1SPMVBAT1K0.1C222VSS1220KR22322KR222EEPROM(64K)1 A02 A13 A24 VSS 5SDA6SCL7WP8VCCK0.01C33310KR331K0.1C30610MR377RST10KR234PDN13.824MHzX201C377 K0.1C215 K0.1TCKTMSTDITDOR333 1KNCC322C206K0.12.2MR376K0.01C221Q36147KR361C3356V2247KR363NCC336R201 NCK0.1C224NCR2242.2V RESETOUT 1 VDD2NC3GND4C371 K1.0270KR243NCR354C214 10NCC361L211NC Q331R209 100KTXUARTRXQ231NCC312MICPC3176V22MICMC311 NCNCC313NCR351C307 NCC304NCC2116.3V330C209 NCQ363NCR232K0.1C231D231 NCR23122KNCC244R312 2.2K1.0C303NCR352C223 NCK0.1C2251KR225K0.1C2411KR24210KR241C242 J100PL334L331L332NCC334NCC332L327L326K0.01C305K0.01C212K0.01C353C354NCVBAT2VSS2MICCHG1CHG2BATTP+BATTM-11.GNDPA2SPOUTP3BCLK4RSSI5XIN6XOUT7VDD8VCCIN9GND10DCDCGND11DCDCIN12DCDCOUT13RSTN14FLASH_RESET15FLASH_DO16FLASH_DI17FLASH_CS18BGPIO619SERIAL_DI20TXO21MOD_EN22BGPIO1123BGPIO1224RF_RESET2525.BGPIO1526 SHCTRL27 CGPIO428 GND29 VCC30 SERIAL_LE31 SERIAL_CLK32 SERIAL_DATA33 RXEN34 TXEN35 RXGAIN36 RXDATA37 DGPIO1038 CHG_DET39 OSC_BUF40 EEPROM_DET41 DGPIO642 DGPIO543 DGPIO444 LCD_DB745 LCD_DB646 LCD_DB547 LCD_DB448 GND49 VCC5050.LCD_RESET51 FLASH_CLK52 AGPIO153 TALK_LED54 VE_LED55 BAT_LED5657LCD_CSLCD_WR58 LCD_RD59 LCD_POWER_CTRL60 ANT_LED61 KEY_BL62 EGPIO663 STB_E64 STB_D65 STB_C66 STB_B67 STB_A68 GND69 VCC70 TCK71 TMS72 TDI73 TDO74 KIN_175 KIN_2 7676.KIN_377KIN_478KIN_579AGPIO080CHG_CTRL81EEPROM_SCL82EEPROM_SDA83UART_TX84UART_RX85EEPROM_WP86GND87PDN88IBAT89VREF90MIP91MIN92MIC_PWR93GNDA94VCCA95HEADSET_MIN96HEADSET_DET97HSSPOUTN98HSSPOUTP99VCCPA100SPOUTNC243NC6.3V330C373D3612.0V RESETOUT 1 VDD2NC3GND410R208R205 NCR207 NCR206 NCR228NCNCR230C205NCRA2014.7K1357 8642L351NCL352NC2.2KR3182.2KR334NCR332NCR325K0.1C226220KR227C372 K1.0NCR364C227K0.1K0.01C3400R3403.3KR368C208 10Q243D37347 HL373Q373GSD2.6V REG1 NC2 VSS3 CE 4VIN5VOUTR317 100DC/DC1 VOUT2 VDD3 ON/OFF 4VSS5EXT1KR362NCR366NCR367NCD326NCD327NCD312NCD313 NCD324NCD323R226 27KD223C201 C6PC202 C6PQ362Q22118R32318R324C314K0.018C315K0.0182.2KR3142.2KR315C316 K0.015C3216V2.2KIN_5KIN_4KIN_3KIN_2KIN_1STB_ASTB_BSTB_CSTB_DSTB_EHANDSET SP+-+POWERDOWNRESETVCCHEADSET-DET2.6VCHARGE_DETSP-Phone-2.6VDC/DC_OUT(1)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(38)(37)(39)(40)(41)(42)(43)(44)(45)(46)(47)(32)(33)(34)(35)(36)(6)(5)(4)(3)(2)KX-TGA254 SCHEMATIC DIAGRAM (Handset_Main)NC: No ComponentsIC241IC221IC201IC374IC371IC37324msPower ON(Reset)Handset TX-33dBm/600 IN88mVp-pSP phone TX-43dBm/600 IN30mVp-pSP phone RX(MIC Mute: ON)1.8Vp-p/8(Vol. MAX)Handset RX(MIC Mute: ON)590mVp-p/150(Vol. MAX)3.0V2.3~2.9VHeadset RX170mVp-p/150(Vol. MAX)Headset TX-37dBm/600 IN50mVp-pTEST SIGNALFREQUENCY:1KHz87KX-TG2448BXF / KX-TG2448BXS / KX-TGA254BXF / KX-TGA254BXS