Icom IC-F4001 Service Manual

Contents

Icom IC-F4001 Service Manual Manual pdf 12 page image

4 - 44-5 PORT ALLOCATIONS• CPU (IC51)• D/A CONVERTER (IC57)PINNO.LINENAME DESCRIPTION I/O1 CDEC Tone signal (CTCSS/DTCS)decoding input. I2 STONE Tone signal (5/2 TONE, DTMF,BIIS) decoding/encoding . I/O13 CSFT Clock frequency shift.H=Clock frequency is shifted. O14 NWCR X m o d e ( n a r r o w / w i d e )switching.L= While receiving in the narrowmodeO15 EPTT External PTT input.H=An external PTT is pushed. I16 ATXAutomatic TX control for VOXmode.H=Microphone input is detected.O17 BEEP Beep sounds. (Square waves) O18 AFONAF power AMP control.H= A F p owe r A M P ( I C 5 5 ) i sactivated.O19 SCK Common clock. O20 SO Common serial data. O22 KEY2 [UPPER] key input.L=Pushed I23 KEY1 [LOWER] key input.L=Pushed I24 PLST PLL strobe.H=Load enable. I/O25 DAST D/A converter strobe.H=Load enable. I/O26 ESDA EEPROM data. I/O27 ESCL EEPROM clock. I/O28 R5CPower supply switching control.H= S u p p l y i n g c u r r e n t t o t h ereceiver circuits ("R5"line).O29 T5CPower supply switching control.H= S u p p l y i n g c u r r e n t t o t h etransmitter circuits ("T5"line).O30 S5CPower supply switching control.H= Supplying current to the RX/TX common circuits ("S5"line).O31 PWONPower supply switching control.H= The transceiver's power isON.O32 IPTT Internal PTT input.L=PTT pushed. I33,34,36CENC2,CENC1,CENC0CTCSS/DTCS signal. O37–40CBI0–CBI3 [ROTARY SELECTOR] input. I41 DUSE Frequency response switching.H=DTCS encoding O42 RLED Busy LED (Green) control.L=LED lights. (Squelch open) O43 TLED Busy LED (Red) control.L=LED lights. (Transmit) O47 MGC0 MIC gain control. O48 MGC1 MIC gain control. O49 CLI Cloning data. I50 CLO OPINNO.LINENAME DESCRIPTION I/O51 ADSW A/D conversion select.H=RSSI input, L=BATV input O53 NOIS Noise level detect.H=Squelch close I54 UNLK PLL unlock detect. I55 RMUT2 RX AF mute switch control.L=AF mute. O56 RMUT1 RX AF mute switch control.L=AF mute. O57 MMUT MIC mute switch control.L=MIC mute. O58 TMUT Transmission mute.L=TX inhibit. O59 MDET External microphone connectiondetect. I60 LVIN Lock voltage input. I61 TEMP Temperature sensing voltage. I62 AFVI [VOLUME CONTROL] input. I63 VOXV Microphone input sensing voltage. I64 AD5Remaining battery voltage.(or)RSSI voltage.( The input signal depends on thestatus of pin 51.)IPINNo.LINENAME DESCRIPTION23 T1(TXPO)BPF tuning voltageTX power control24 T2 BPF tuning voltage7 REF Reference frequency adjust voltage.8 LVA Additional lock voltage adjustment.11 SQLC Squelch threshold setting.12 TENC CTCSS deviation adjustment.19 BAL DTCS balance.20 VRAF Max. deviation/AF volume adjustment.