Icom IC-E7 Service Manual

Also see for IC-E7: Instruction manual Service manual Instruction manual

Contents

4 - 5PinNo.PortName Description2 K2 Input port for [Y], [Z]keys.3 K1 Input port for [BAND], [CALL] and [V/M] keys.4 RSSI Input port for RSSI signal for the S-meterindicator from FM IF IC (IC15, pin 12).5 VIN Input port for volatage detection of attachedbattery pack.6 CTONE Input port for WX signal.7 RTONE Input port for CTCSS/DTCS signal.14 ESIO I/O port for EEPROM (IC1) data.15 ECK I/O port for the EEPROM (IC1) clock.25 POWER Input port for [PWR] key (S6).LOW: When the key is pushed.26 DSTB Outputs strobe signal to the D/A converter(IC13, pin 8).28 CLS Outputs clock sift signal to the clockfrequency shift circuit (Q5).29 VSTB Outputs VOL strobe signal to the electronicVR (IC7, pin 14).32 PDAOutputs serial data to the PLL IC (IC18, pin 13),electronic VR (IC7, pin 16) and D/A converter(IC13, pin 6).33 PSTB Outputs PLL strobe signal to the PLL IC(IC18, pin14).34 PCKOutputs serial clock signal to the PLL IC(IC18, pin 12), electronic VR (IC7, pin 15) andD/A converter (IC13, pin 7).35 PUL Inputs PLL unlock signal ("PUL") from PLL IC(IC18, pin15).41 LEDROutputs TX indicator LED (DS8; Red) controlsignal to the LED driver (Q49)."High": While transmitting.42 LEDGOutputs RX indicator LED (DS8; Green)control signal to the LED driver (Q49)."High": While receiving.43 UHFCOutputs UHF RF circuit control signal to theband selector (Q36)."High": While receiving on the UHF band.44 R3COutputs receive circuit control signal to R3Vregulator (Q6)."High": While receiving.45 WFMOutputs receiving mode (FM/WFM) switchingsignal to the FM/WFM switches (Q16, Q17,Q51, Q52)."Low": While receiving in FM mode.46 AMOutputs receiving mode (AM/FM) switchingsignal to the AM demodulator switch (Q18)and AF switch (IC14)."High": While receiving in AM mode.47 NOISE Inputs "NOISE" signal from the FM IF IC(IC15, pin 13).48 DTCS Outputs DTCS filter control signal to theDTCS fi lter (Q41).49 TCON Outputs tone filter control (IC5) signal to theCTCSS fi lter switch (Q8).PinNo.PortName Description51 VHFCOutputs VHF RF circuit control signal to theband selector (Q36)."High": While receiving on the VHF band(76−300 MHz).52 PCONOutputs +3V line control signal to the +3Vregulator (IC10)."High": While the transceiver's power is ON.53 +3SC Outputs +3S line control signal to the +3Sregulator (Q3, Q4).54 TXCOutputs transmit circuits control signal to T3regulator circuit (Q24–Q27)."High": While transmitting.55 BEEP• While receiving, outputs beep sound to theelectric volume (IC7, pin6).• While transmitting, outputs 1750 Hz tone signalto the microphone amplifier circuit (IC8, pin 9).56 TXUOutputs UHF TX circuit control signal to TXband switch (Q27)."High": While transmitting on UHF band.57 TXVOutputs VHF TX circuits control signal to TXband switch (Q27)."High": While transmitting on VHF band.58 VSHIFTOutputs oscilating frequency shift circuit(VCO BOARD; Q5, D2–D4) control signal."High": D2–D4 are ON, and the oscillatingfrequency is shifts down.59 DBL2Outputs doubler switches (VCO BOARD;D13, D17) control signal."High":While receiving 500 MHz and below.60 DBL1Outputs doubler switches (VCO BOARD;D12, D16) control signal."Low":While receiving 500 MHz and above.61 ATTOutputs attenuator control signal to theattenuator controller (Q40)."High":While attenuator is activated.63 HFC Outputs HF RF circuit control signal to theHF band selector (Q35).64 BCC Outputs 0.5–30MHz receive circuit controlsignal to the HF band selector (Q35).65 V3C Outputs 430 MHz VCO control signal to the430 MHz VCO switch (VCO BOARD; Q3).66 V2C Outputs 144 MHz VCO control signal to the144 MHz VCO switch (VCO BOARD; Q3).67 V1C Outputs 50 MHz VCO control signal to the50 MHz VCO switch (VCO BOARD; Q4).68 AFONOutputs AF power amplifier (IC9) control signalto the AF power amplifier controller (Q46, Q47)."High": While the audio is emitted.69 LIGHTOutputs backlight control signal to the LCDbacklight (PA BOARD; DS1) driver (Q22)."High": While the backlight is ON.70 MMUTEOutputs MIC line mute signal to the MICmute switch (Q37)."High": MIC signal is muted.71 800C Outputs 500 – 999 MHz RF circuit controlsignal to the 800 MHz band selector (Q40).73,74DUD,DCK Input ports for [DIAL].4-4 PORT ALLOCATIONS4-4-1 CPU (MAIN UNIT; IC4)