Icom IC-V85 Service Manual

Also see for IC-V85: Step-by-Step Programming Guide Instruction manual Service manual Instruction manual

Contents

4 - 4VCC SW5VSW5V7445“PS5C”VCO5T5VR5VLOGIC UNITRF UNIT• POWER SUPPLY CIRCUITSRF UNITPS5VLogical circuits;CPU (IC8),Reset IC (IC21),EEPROM (IC7), etcVCO and BUFFER amp.;VCO (Q76, D59−D61),Buffers (Q5, Q74, Q75), etc.COMMON;PLL IC (IC19),D/A converter, etc.TRNSMITTER CIRCUITS;Pre-driver (Q3), etc.RECEIVER CIRCUITS;IF IC (IC2), 1st mixer (Q13),1st IF amp. (Q14), etc.FOR POWER SAVE MODE;APC amp. (IC26),tone amp. (IC26), etc.CPU(IC8)“R5C”“T5C”“PSVCO”Q11Q4, D6, D7Q9, Q10, Q18, Q19IC12Q22Q21Q5473 58 69VCO5RegulatorSW5VRegulatorCPU5RegulatorChargercircuitT5VRegulatorR5VRegulatorPS5VRegulator“PWRON”From thebatteryFrom theext. DC powerVoltage lineControl signal4-4 POWER SUPPLY CIRCUITSDC voltage from the battery or external DC power supply is routed to whole circuit of the transciever via regulators.4-5 CPU PORT ALLOCATIONPinNo.PinName Description I/O1 TONE Tone signals (DTMF/BEEP/1750Hz). OUT2 CTCSS Tone signals (CTCSS/DTCSS). OUT4 AFON AF power amplifi er control signal."High"=While the AF poer amp. is activated. OUT5 RMUTE AF line mute signal to the AF switch."Low"=While muting. OUT9 CSHIFT Clock frequency shift control signal to theclock oscillator. OUT10 RESET CPU reset signal."Low"=CPU reset. IN16 PWRSW [PWR] Key."Low"=When the key is pushed. IN17 NOIS "NOIS" signal. IN18 DCC Eexternal power supply connection detect."Low"=Powered by external DC. IN19 HOUT Power supply detect."Low"=Powered by battery. IN20 PTT Input signal from [PTT] key."High"=While the key is pushed. IN21−24 KR0−KR3 Input signal from Key pads."Low"=When the key is pushed. IN25 LEDC Backlight control signal to the LED driver. OUT33 DISDA Serial data to the LCD driver. IN34 DISST Chip-enable signal to the LCD driver. IN35 DISCK Serial clock signal to the LCD driver. IN36 DISEN Disable signal to the LCD driver. IN40 DICK Pulse signal from [CONTROL DIAL]. IN41 DIUD IN42 MONISW [MONI] key."Low"=When the key is pushed. IN45 PWRON Control signal to the power regulator. OUT48−52 KS0−KS4 Input signal from Key pads."Low"=When the key is pushed. OUT53 MICS AF fi lter switching signal. OUT54 MMUTE MIC line mute signal to the AF switch."low"=While muting. OUT55 DADATA Data signal to the D/A converter. OUT56 DACK Clock signal to the D/A converter. OUTPinNo.PinName Description I/O57 DASTB Strobe signal to the D/A converter. OUT58 T5C T5 line control signal to the T5 regulator."Low"=While transmitting. OUT59 TXC Transmit mute signal to the TX switch."Low"=While TX muting. OUT61 UNLK PLL unlock signal."Low"=PLL is unlocked. IN63 PLLSTB Strobe signal to the PLL IC. OUT64 PLPS PLL IC power save mode switching signal."Low"=While in power save mode. OUT65 PLLDATA Data signal to the PLL IC. OUT66 PLLCK Clock signal to the PLL IC. OUT68 PLLSW PLL loop fi lter characteristic toggle signal."High"=While the PLL is kicked-up. OUT69 PSVCO VCO regulator control signal."Low"=While Vco is activated." OUT70 CHGIH Charger circuit (High) control signal."High"=While charging. OUT71 CHGC Charger circuit control signal."High"=While charging. OUT74 PS5CPower save line control signal to the PS5Vregulator."Low"=While power save mode.OUT77 SI External MIC key (A/D) input."High"=While the key is pushed. IN78 OPSD Data signal to the attached optional unit. OUT79 ESCK Clock signal to the EEPROM. OUT81 OPV1 Scramble unit detection signal."Low"=DTMF unit is attached. IN82 OPV2 Optional unit attachement detection signal."Low"=DTMF unit is attached. IN83 OPV3 DTMF unit detection signal."Low"=DTMF unit is attached. IN87 DCIN External power supply's voltage detection. IN88 LVIN Lock voltage. IN90 SD "SD" signal (RSSI signal). IN91 VIN Remining battery voltage detection. IN93 CTCIN DTCS and CTCSS signals. IN