Icom IC-F5121D Service Manual
Also see for IC-F5121D: Instruction manualPrice listInstruction manual
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5 - 45-5 PORT ALLOCATIONS• CPU (FRONT UNIT: IC51)• D/A CONVERTER (IC1006)PINNo.LINENAME DESCRIPTION23 T1(TXPO)During receiving: O u t p u t s B P F t u n i n gvoltage.During transmitting: TX power referencevoltage.24 T2 Outputs BPF tuning voltage7 REF Outputs reference frequency adjustvoltage.8 LVA O u t p u t s a d d i t i o n a l l o c k v o l t a g eadjustment.11 SQLC Outputs Squelch threshold setting.12 TENC Outputs CTCSS deviation adjustment.19 BAL Outputs DTCS balance.20 VRAF O u t p u t s M a x . d ev i a t i o n / A F vo l u m eadjustment.BALLNo.LINENAME DESCRIPTION I/OA1 KR1 [P1] input. IA5 RXC Power supply switching control.H= During receive or stand-by. OA7 TDAT Serial data to the DSP (IC2007). OA15 PWON Power supply switching control.H= The transceiver's power is ON. OB1 KR3 [P3] input. IB2 KR0 [P0] input. IB12 NOIS Noise level detect.H= Squelch close IB13 EPTT External PTT input.H= An external PTT is pushed. IB14 PGIO4 External I/O port. I/OB15 AFONAF mute SW control.H= D u r i n g t h e s q u e l c h c i r c u i t i sactivated.OC3 KR2 [P2] input. IC5 TXC Power supply switching control.H= While transmitting. OC8 ESDA EEPROM (IC52) serial data. I/OC13 POSW [ ] input. IC14 ADS1st IF filters (FI4 and FI5) switchingcontrol.L= During digital mode.OC15 NWCReceive mode (narrow/mid/wide)switching.L= During narrow mode.OD6 DSCK DSP (IC2007) clock. OD8 ESCL EEPROM (IC52) clock. OD13 DPDN DSP (IC2007) power control.H= DSP is inactivated OD14 DRES DSP (IC2007) reset.L= Reset OD15 CSFT Clock frequency shift.H= Clock frequency is shifted. OE13 CRES CPU reset. IH1 SIDE1 [Y] key input.L= Pushed IH2 SIDE2 [Z] key input.L= Pushed IJ1 IPTT Microphone [PTT] input.L= Pushed. IK3 LIGT1 LCD dimmer control.H= Dimmer OFF. OL1, L2 MCG0,MCG1 MIC gain control. OL3 LIGT2 Backlight control.H= Backlight ON. OL14 SSO Common serial data. OL15 SCK Common clock. OM1 TMUT Transmission mute.L= TX inhibit. OM8 BEEP Beep audio. (Square waves) OM14 DAST D/A converter (IC1006) strobe.H= Load enable. ON2 LINH LCD driver (IC6) chip enable.H= Enable. ON12 BATV Power supply voltage sensing. IN14 RDAT DSP (IC2007) serial data. ON15 IGSW Ignition SW detect.L=Ignition detected. IBALLNo.LINENAME DESCRIPTION I/OP2 LCS LCD driver (IC6) chip OP4 PLSW PLL lock up time control.L= Fast lock up OP10 TEMP Temperature sensing voltage. IP11 RSSI RSSI sensing voltage. IP12 AFVI [VOLUME CONTROL] input. IR1 LSO LCD driver (IC6) serial data. OR4 PLST PLL strobe. OR10 LVIN Lock voltage input. I |
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