Icom HF/VHF/UHF ALL MODE TRANSCEIVER manual Maintenance, Fuse replacement, Memory backup, Cleaning

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MAINTENANCE 8

■Fuse replacement

If a fuse blows or the transceiver stops functioning, try to ﬁnd the source of the problem, and replace the damaged fuse with a new, rated fuse.

Caution: Disconnect the DC power cable from the transceiver when changing a fuse.

The IC-706MKIIG has 2 types of fuses installed for

transceiver protection.
• DC power cable fuses	...................................... 30	A
• Circuitry fuse	F.G.M.B. 125 V 4	A

DC POWER CABLE FUSE REPLACEMENT

30 A fuse

CIRCUITRY FUSE REPLACEMENT

The 13.8 V DC from the DC power cable is applied to all units in the IC-706MKIIG, except for the power ampliﬁer, through the circuitry fuse. This fuse is installed in the PA unit.

4 A Fuse

■Memory backup

All of the CPU’s memory is backed up by an EEP- ROM (Electronically-Erasable Programmable Read- Only Memory). All data you set, such as VFO, mem- ory, set mode contents, etc. is stored in this EEP- ROM. There is no internal lithium battery.

■Cleaning

If the transceiver becomes dusty or dirty, wipe it clean with a dry, soft cloth.

AVOID the use of strong chemical solvents such as thinner, benzine or alcohol to clean the transceiver. These may damage the transceiver’s surfaces.

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Contents I706MKG Word Definition Rwarning PrecautionsTable of Contents 0MAIN Dial Tension Latch Panel DescriptionFront panel @2PREAMP/ATTENUATOR Switch P.AMP/ATT 2LOCK Switch LockFunction switches Function p VOX Function pSpeech Compressor p BREAK-IN pRear and side panels ACC Socket When connecting the ACC conversion cable OPC-599ACC PIN # Name Description Specifications Color Function display 1DOT Matrix Indicators3FUNCTION Indicators 4DSP IndicatorsHM-103 Schematic Diagram ➊UP/DOWN Switches UP/DN ➋LOCK Switch Lock➌PTT Switch PTT Microphone ConnectorGrounding Installation and ConnectionsPL-259 Connector Installation Example UnpackingFront panel separation InstallationSingle body mounting StandRtty Terminal Required connectionsAdvanced connections Connecting a NON-ICOM Power supply connectionsConnecting the PS-85 DC Power Supply Connecting a NON-ICOM DC Power SupplyExternal antenna tuners and linear ampliﬁer Connecting the AH-4Connecting the AT-180 Connecting the IC-PW1Power OFF Frequency SettingWhen ﬁrst applying power CPU resetting Initial settingsVFO VFO ModeMemory Mode pgs VFO descriptionBand selection Frequency settingProgrammable tuning steps Hz and 10 Hz tuning stepsSub dial function MHz quick tuning stepTS Switch Flow Chart SSB/CW/RTTY modes Any mode FM/WFM/AM modes➁ Push F-1-F-3 to select a band stacking register Mode selectionOperating Mode Selection Quick band change functionRIT function Receive and TransmitFunctions for receive If shift functionPeak meter hold Noise blankerAGC time constant Preamp and attenuatorRF/SQL control priority RF gain and squelchSimple band scope SSB Filter PresettingOptional ﬁlter selection Filter ON/OFFNR Noise Reduction function Ceiver maintains the ON/OFF condition when pushing F-2NRANF Automatic Notch Filter function DMeter function Output power and mic gainFunctions for transmit VOX operation Speech compressorTuner Operation Manual TuningOptional AT-180 Automatic Antenna Tuner operation PTT tune function ➂ The Tuner light lights constantly when tuning is completeOptional AH-4AUTOMATIC Antenna Tuner operation AH-4 operationSplit lock function Split frequency operationQuick split function ➀ Select VFO a and set the frequency to 7.057 MHz/CW➄ Push and hold PTT to transmit release PTT to receive Repeater operation➂ Push F-3SCN to toggle tone scan operation on and OFF Tone squelch operationTone scan operation ➅ Communicate in the usual mannerFrequency Duplex Direction One-touch repeater functionAuto repeater function This function automatically activates the repeater setElec KEY Functions for CWConnections for CW CW operationCW pitch control CW reverse modeDElectronic CW keyer Quick SET Mode Setting the electronic keyerConnections for Afsk Functions for RttyConnections for Rtty FSK Rtty Afsk operation Presetting for RttyRtty FSK operation Data socket Adjusting the transmit signal output from the TNCPacket operation Connections for packetPlot measurement Measuring SWRSpot measurement Memory clearing Memory and Scan OperationMemory channels Memory channel selectionMemory/call programming Programming in VFO modeProgramming in memory mode Editing programming memory names Frequency transferringMemory names Calling up memory names➀ Select the S1 display Memo padsWriting frequencies and operating modes into memo pads Calling up a frequency from a memo padPreparation Scan typesPriority watch Programmed scan operationMemory scan operation Select memory scan operationData format Remote Jack CI-V InformationCI-V connection example VFO A=B Command TableGeneral SET ModeQuick set mode operation Initial set mode operationQ4 VOX Gain SSB/AM/FM only Quick set mode itemsQ3 VOX Delay SSB/AM/FM only Q2 MIC Gain SSB/AM/FM onlyQ5 Anti VOX SSB/AM/FM only Initial set mode items RF/SQL SQL/AUTO/RFSQL DUP HF duplex offset Quick Split quick split functionSplit Lock split lock SPL Offset split offsetScan Resume scan resume AM NB Noise blanker in AM modePWR on CHK Power on check Auto Rptr auto repeaterVsend SEL ACC socket output 29 9600 Mode Data socket speedTune Strt auto tuner start PTT Tune PTT tune functionCI-V TRN CI-V transceive LVL Spch S-level speechCI-V Addres CI-V address CI-V Baud CI-V data rateCleaning MaintenanceFuse replacement Memory backupPower Supply Receive Problem Possible Cause Solution TroubleshootingTransmit Display Scan Problem Possible Cause Solution Opening the transceiver case Optional INSTALLATIONS/SETTINGSIf ﬁlters DOperation InstallationPIN no Description Name AT-180 internal switch descriptionS2 S1 B a Bottom view Internal ViewsTop view Options SP-21EXTERNAL Speaker SP-7EXTERNAL SpeakerSP-10EXTERNAL Speaker SP-12EXTERNAL Speaker SP-20EXTERNAL SpeakerSpecifications Indication Description No. Indication + power onPower OFF then on to exit initial set mode Menu GuideMenu Display SSB/AM/FM mode CW mode Rtty modeMode Display For 2 secCount on us