Icom IC-F11 Service Manual

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Contents

Icom IC-F11 Service Manual Manual pdf 48 page image

4 - 44-4 POWER SUPPLY CIRCUITSVOLTAGE LINELINEHVVCCCPU5VT5VR5VS5V+5VVCO5VDESCRIPTIONThe voltage from the attached battery pack.The same voltage as the HV line (battery volt-age) which is controlled by the power swtich([VOL] control).Common 5 V converted from the VCC line by the+5 regulator circuit (IC10). The output voltage isapplied to the CPU (IC7), reset circuit (IC8) andetc.5 V for transmitter circuits regulated by the T5regulator circuit (Q27).5 V for receiver circuits regulated by the R5 reg-ulator circuit (Q26).Common 5 V converted from the VCC line by theS5 regulator circuit (Q24, Q19).The same voltage as the CPU5V line for the ana-log swtich (IC6), buffer amplifier (Q13), etc.The same voltage as the +5V line for the TX-VCO (Q11), RX-VCO (Q10) and buffer amplifiers(Q5–Q7).4-5 PORT ALLOCATIONS4-5-1 CPU (IC7)Pinnumber7131419202324252829303637383940414243444546515253545557585960PortnameRESSENC0SENC1SENC2SENC3CENC0CENC1CENC2SCKSOBEEPPLSTDASTEXSTPTTTXCRLEDTLEDAFONESDACLICLOF1F2NOISUNLKTEMPCDECSDECRSSILVINDescriptionInput port for RESET signal.Outputs single tone encode signal.Outputs CTCSS/DTCS data signal.Outputs serial clock signal to the PLLIC (IC1), EEPROM (IC11), etc.Outputs data signal to the PLL IC(IC1) and D/A convertor (IC9).Outputs beep audio signal.I/O port for strobe signal from/to PLLIC (IC9).• Outputs strobe signal to the D/A con-vertor (IC9).• Input port for the initial version sig-nal.Outputs strobe signal for the expanderIC (IC15).Input port for [PTT] swtich signal.High: While [PTT] switch is pushed.Outputs TX mute control signal.High: While transmittingOutputs BUSY LED control signal.High: While receiving.Outputs TX LED control signal.high: While transmitting.Outputs control signal for the regulatorcircuit of AF power amplifier.High: While squelch is open, etc.I/O port for data signal from/to theEEPROM (IC11).Input port for cloning signal.Outputs the cloning signal.Input ports for the customization keysignals.Input port for the noise pulse signal forthe squelch function.Input port for PLL unlock signal.High: PLL is locked.Input port for the transceiver’s internaltempereture detection.Input port for CTCSS/DTCS signals.Input port for single tone decode sig-nal.Input port for the RSSI voltage.Input port for the PLL lock voltage.