EFJohnson 764X, 761X service manual RLOý0/ìçíå$ýì5í.ð7 Íëëðêäíçðçèç 03ì Ýìäëëý9&2ýFDVH

EFJohnson 764X, 761X service manual VHF Test Frequencies, UHF Test Frequencies, COMPUTER-AIDED Tuning EFJohnson 761X, 764X VHF Adjustments, Preliminary Setup, PLL Adjustment VHF Models, Transmitter Adjustments VHF Models EFJohnson 764X, 761X service manual VHF Adjustments CONT’D, Output Power Adjust, FM Deviation Adjust EFJohnson 761X, 764X Dtcs Waveform Adjust, Receiver Adjustments VHF Models, Bandpass Filter Adjust, Squelch Adjust EFJohnson 764X, 761X service manual Beep Tone Level Adjustment EFJohnson 761X, 764X service manual UHF Adjustments, PLL Adjustment UHF Models, Transmitter Adjustments UHF Models EFJohnson 764X, 761X service manual UHF Adjustments CONT’D, UHF Adjustment Points EFJohnson 761X, 764X service manual UHF Adjustments CONT’D Receiver Adjustments UHF Models, Bandpass Filter Adjust EFJohnson 764X, 761X service manual Parts List, Æçìíýõ9+ôý0$,1ý81,7 EFJohnson 761X, 764X service manual Íäç HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ Íëëðêäíçðíçí Íäæ EFJohnson 764X, 761X service manual Ìää HUDPLFý&ìçíåý-%ýì&ýìíé.7ð1 Íëëðêäíçðçìé Ëíí EFJohnson 761X, 764X service manual Ëäí HUDPLFý&ìçíåý-%ýìýìíê.ð7ð$ Íëëðêäíçðíçê Ëäì EFJohnson 764X, 761X service manual RLOý0/ìçíå$ýì5í.ð7 Íëëðêäíçðçèç 03ì Ýìäëëý9&2ýFDVH EFJohnson 761X, 764X service manual 5íéé 5HVý5-ê*-ýìííý9ýõìíýRKPô Íëëðêäíçðìêå 5íéè EFJohnson 764X, 761X service manual 5ìèé 5HVý5-ê*-ýìíéý9ýõìííýNýRKPô EFJohnson 761X, 764X service manual Æçéíýõ8+ôý0$,1ý81,7 EFJohnson 764X, 761X service manual Íêì HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ Íëëðêäíçðíçí Íêë EFJohnson 761X, 764X service manual Íäé HUDPLFý+0çí6-ý&+ýíêíýèíí9ý EFJohnson 764X, 761X service manual Õéäíðèìëý0+ô Ìèì EFJohnson 761X, 764X service manual 5HIý1Rï EFJohnson 764X, 761X service manual Êëç EFJohnson 761X, 764X service manual Íëëðêäíçðäèë EFJohnson 764X, 761X service manual 4éì 7UDQVLVWRUý7&êçê.ý7ìéæ EFJohnson 761X, 764X service manual 5íæé EFJohnson 764X, 761X service manual 5ìçå 5HVý5-ê*-ýìíéý9ýõìííýNýRKPô EFJohnson 761X, 764X service manual 5217ý81,7 Õ9+ý$1ý8+ý02/6ô EFJohnson 764X, 761X service manual =HQHUý0$åíèìð0ýõ7ô EFJohnson 761X, 764X service manual Æçìíýõ9+ôý&+$66,6ý3$576 EFJohnson 764X, 761X service manual VHF 7610 Exploded View, Front Unit EFJohnson 761X, 764X service manual UHF 7640 Exploded View EFJohnson 764X, 761X service manual Schematic Diagrams and Component Layouts, VHF 7610 Block Diagram, Main Unit, Front Unit EFJohnson 761X, 764X service manual VHF 7610 Transistor Basing Diagrams EFJohnson 764X, 761X service manual Foldout → EFJohnson 761X, 764X service manual VHF 7610 Main Board TOP View EFJohnson 764X, 761X service manual VHF 7610 Main Board Schematic, VHF Main Unit EFJohnson 761X, 764X service manual UHF 7640 Block Diagram
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PARTS LIST

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November 1998

7-5

 

Part No. 001-7600-001

Page 69 Page 71
Image 70
Page 69 Page 71
Contents 761x VHF 764x UHF Conventional Mobile Conventional FM TWO-WAY Radio Table of Contents Table of Contents CONT’D Schematic Diagrams and Component Layouts General Information Toll-Free 800 75xx AccessoriesAccessory Factory ReturnsReplacement Parts Internet HomeThis page intentionally left blank VHF and 7640 UHF Mobile Specifications GeneralGeneral Information Installation and Disassembly Transceiver InstallationPower Cable Installation Installing Mounting BracketInstalling Microphone Hanger Cable InstallationUsing AN External Speaker Power Cable FusesChanging 20-Ampere Power Cable Fuses Accessory Cable InstallationRemoving PC Board Transceiver DisassemblyRemove shield E Setting 5-Tone Deviation 2-TONE/5-TONE Module InstallationInstallation Procedure 2 2-TONE ProgrammingInstallation and Disassembly Features OperationTransceiver Back Panel Controls and DisplayBasic Operation Direct Selection The F1-F4 Receiving and Placing Calls Option Key Programmable Functions TIME-OUT TimerProgrammable Functions Function Key Label Description Section NoCall Guard Tone Select Monitor Mode SelectOutput Power Select Channel SelectChannel Scan Priority Channel Sampling Programming Cables Programming SetupSection Programming Programming SoftwareMenu Flow Starting the ProgramSpecial Keys and Functions File MenuPrint Menu Screen MenuProgram Menu Model MenuMemory Channel Screen Description LMR Models Setup MenuParameter Description Bank Select Frequency TimerCh Atr Rx/TxScan Auto ResetLockout ToneKey and Display Assign Screen Description Key DescriptionKey Description Label Selection RF PowerDtmf Autodial Screen Description Bank/FreeScan Function Screen Description Continuous Tone Screen DescriptionParameter Description Resume Stop Timer2-Tone Code Channel Screen Description Auto CHAuto Tx EXO TimerTimer Auto Tx StunCommon Screen Description Expert Screen Description Unique PMR European Screens Unique PMR ScreensCloning Programming ONE Transceiver with Another Memory Channel Screen PMR Models This page intentionally left blank VHF 7610 Circuit Description VHF Receiver CircuitAudio Amplifier Circuit Receiver Mute CircuitMicrophone Amplifier Circuit Power Amplifier ModuleVHF Transmitter Circuit Modulation CircuitVHF PLL Circuit APC CircuitPLL Circuit Line Description VHF IC PIN DescriptionsPin Port Description VHF Port Expander IC11 Main Unit VHF I/O Expander IC5 Main UnitPin Pin Port Description NameUHF 7640 Circuit Description UHF Receiver CircuitSecond if System IC1 UHF UHF Transmitter Circuit PLL Circuit UHF UHF PLL CircuitUHF Power Supply UHF CPU IC1 Port AllocationUHF I/O Expander IC12 Main Unit UHF Port Expander IC13 Main UnitSuggested Test Equipment Adjustment ProcedureTest Setup Equipment Grade and RangeTest Channels Test CableVHF Test Frequencies COMPUTER-AIDED TuningUHF Test Frequencies Preliminary Setup VHF AdjustmentsVHF Adjustments PLL Adjustment VHF ModelsOutput Power Adjust VHF Adjustments CONT’DFM Deviation Adjust Bandpass Filter Adjust Dtcs Waveform AdjustReceiver Adjustments VHF Models Squelch AdjustBeep Tone Level Adjustment Beep Tone LevelPLL Adjustment UHF Models UHF AdjustmentsTransmitter Adjustments UHF Models UHF Adjustments CONT’D UHF Adjustment PointsUHF Adjustments CONT’D Receiver Adjustments UHF Models Parts List Æçìíýõ9+ôý0$,1ý81,7Íäç HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ Íëëðêäíçðíçí Íäæ Ìää HUDPLFý&ìçíåý-%ýì&ýìíé.7ð1 Íëëðêäíçðçìé Ëíí Ëäí HUDPLFý&ìçíåý-%ýìýìíê.ð7ð$ Íëëðêäíçðíçê Ëäì RLOý0/ìçíå$ýì5í.ð7 Íëëðêäíçðçèç 03ì Ýìäëëý9&2ýFDVH 5íéé 5HVý5-ê*-ýìííý9ýõìíýRKPô Íëëðêäíçðìêå 5íéè 5ìèé 5HVý5-ê*-ýìíéý9ýõìííýNýRKPô Æçéíýõ8+ôý0$,1ý81,7 Íêì HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ Íëëðêäíçðíçí Íêë Íäé HUDPLFý+0çí6-ý&+ýíêíýèíí9ý Õéäíðèìëý0+ô Ìèì 5HIý1Rï Êëç Íëëðêäíçðäèë 4éì 7UDQVLVWRUý7&êçê.ý7ìéæ 5íæé 5ìçå 5HVý5-ê*-ýìíéý9ýõìííýNýRKPô 5217ý81,7 Õ9+ý$1ý8+ý02/6ô =HQHUý0$åíèìð0ýõ7ô Æçìíýõ9+ôý&+$66,6ý3$576 VHF 7610 Exploded View Front UnitUHF 7640 Exploded View Main Unit Schematic Diagrams and Component LayoutsVHF 7610 Block Diagram Front UnitVHF 7610 Transistor Basing Diagrams Foldout → VHF 7610 Main Board TOP View VHF 7610 Main Board Schematic VHF Main UnitUHF 7640 Block Diagram UHF 7640 Main Board Bottom View UHF 7640 Main Board TOP View J4 T o O p tion al Un itUHF 7640 Main Board Schematic VHF/UHF Front Unit Board TOP View VHF/UHF Front Unit Board Bottom ViewVHF/UHF Front Unit Schematic UHF 7640 Transistor Basing Diagrams
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