Panasonic KX-TG8421HGN Service Manual

Also see for KX-TGA840FXN: Service manual

Contents

Panasonic KX-TG8421HGN Service Manual Manual pdf 86 page image

86KX-TG8421HGN/KX-TGA840FXN13.4. Schematic Diagram (Handset)BATT+BATT-0.1R45BATTERYGNDCHG(+)CHG(-)R65( )1kR665.6nF1D8( )100R63C36( )C45 K0.1uC121( )C35( )C15( )+1.8V3.3kR22GNDK1uC47W_LED-W_LED+GNDGND GNDGNDGNDGNDGNDGNDGNDGNDGNDGNDC44K0.1uC48 ( )C150( )GND1.2kR7100R8+1.8Vk0.1uC40D10pC97D10pC96K0.01uC14RF_RXpANT2PONPSELVDD_PADRVTXpTXnTXONRXONANT1RF_RXn2.2kR250R215Q7Q2C41( )BATTERYK0.1uC13 K0.1uC1121 251 241 2AST1 2SP1 2TALK1 281 211 2R1 2SOFT_A1 231 291 2SHARP1 2SOFT_C1 201 271 261 20R225S11 23.3kRA41234R4( )K1uC50K1uC49820R28820R27K1uC51CP+4.0VCP+4.0VCP+2.5VC3( )C38( )56kR203F10kR64GNDCP+4.0VGNDBATTERYL4( )L5( )L8( )C7( )GNDC12K10uD10pC184C43 D10pC46 D10pC16K10u3.9kR2GND_0GND_0C39( )GND6.3V330uC2 CP2Q910R20D727kR30C182( )1kR6 R31( )C147( )0R12C53K10uC52K10uD10pC17D10pC18 VREFmD11kRA11234 56781kRA212 34GNDGND27kR332Q12GNDK1uC332BATTERYGNDQ1127kR3311MR330D10pC54GNDD10pC55GNDCP4.0VPOWERCP2.5VX_CLK( )C4GNDK0.1uC5GNDVREFmC6( )CP+2.5V220R523.3kR531kR553.3kR50K1u16VC101( )C103K1uC27K1u16VC10210kR54( )C28( )C107GND470R51( )C106C105( )25VK1uC100C104( )CN31VssCN32VgCN33XV0CN34V0CN35VccCN36VssCN37VccCN38/CSCN39IF3CN310IF1/IF2CN311RSTCN312VccCN313RS(A0)CN314SICN315VccCN316SCLCN317VmCN318VssTESTLED12UTXURXGNDBATJTAG220RA6112 34K1uC3316.3V330uC1 CP182R71SW1123 65478X110.368M132LED1LED5LED6LED2LED3LED4Q4270R305270R302270R301270R300270R304270R303GNDC138( )( )C139D10pC291 VSS_LNA12 RF_RXp21CIDINp/VREFp3 RF_RXn4 VSS_LNA25 RFP16 RFP07 REF_RES8 AVS_XTAL22RINGp/P3_723RINGn/P3_624RINGOUT/RINGING/P3_525PARADET/P3_426ADC0/P3_327ADC1/INT0/P1_028NTC/ADC241CP_C2y42CP_VOUT1/LED143CP_VOUT2/LED244PON/P1_645VDD146P2_7/BXTAL81GND9 XTAL210 XTAL111 AVD_XTAL12 RF_SUPPLY113 LDO_CTRL14 AVD15 LSRn16 LSRp17 VREFm18 MICh19 CIDOUT/MICn20 CIDINn/MICp29SOCp30SOCn31CHARGE_CTRL32P1_7/CHARGE33PAOUTp/P3_134VDDPA35PAOUTn/P3_036VBAT137CP_C1x38CP_C2x39CP_C1y40VBAT247P1_5/INT5/RDI/VDDE48P1_4/INT4/TDOD49P1_3/INT3/SIO50P1_2/INT2/SK51P1_1/INT1/LE52P2_6/WTF_IN53P0_7/SPI_DI54P0_6/SPI_DO55P0_5/SPI_CLK56P0_4/SPI_EN57P0_3/SCL258P0_2/SDA259P0_1/URX60P0_0/UTX61 RSTn62 JTAG63 P2_5/PCM_FSC/SF64 P2_4/SCL1/PCM_DO/DP365 P2_3/SDA1/PCM_DI/DP266 P2_2/PCM_CLK/CLK10067 P2_1/ECZ2/PWM1/LED468 P2_0/ECZ1/PWM0/LED369 VDD270 LDORF_CTRL71 RF_SUPPLY272 RFP0n73 RFP476 VSS_PADR179 VSS_PADR277 RF_TXp80 RFP275 VDD_PADR78 RF_TXn74 RFP3LDO_CTRLCOL0SOCnCHARGE_CTRLSOCpCHARGEKEY_LEDCOL3COL4COL5ROW0COL1COL2ROW2ROW1ROW3ROW2ROW1JTAGCHARGECHARGE_CTRLURXUTXBELL_LEDCOL0COL1COL2COL3COL4COL5KEY_LEDLCD_CSBLCD_RESETLCD_CDLCD_SDALCD_SCLSOCnROW3ROW0LDO_CTRLLCD_SCLLCD_SDALCD_CDLCD_RESETLCD_CSBSOCpBELL_LEDTo ChargeTerminalTo BatteryWHITE LEDON LCD UNITKEY BACKLIT(Blue)TO RF BLOCKBELL LED(Amber)To PATo Color LCD UnitLCD BACKLITWhite*IC1(1)(2)(3)(4)(5)(7)(6)(9)(10)(11)(12)(13)(14)(8)NC: No ComponentsCharge Current0.75V0V250mVp-p2.5V 4.0VTX _RFRX _RF