EFJohnson 7780 instruction

Part No. 001-7780-500 11-99hph Printed in U.S.A.

Image 116

EFJohnson 7780 service manual

Contents

7780 Page Page Table of Contents Table of Contents CONT’D List of Tables List of Figures General Information Scope of Manual Equipment Description Accessories Factory Customer ServicePart Number Breakdown Transceiver Identification Accessories AccessoryToll-Free 800 Factory Returns Definitions Replacement PartsInternet Home Intrinsically Safe Information Temperature Code T3C Possible Ignition SourcesIntrinsically Safe and Nonincendive Ratings Classification of Hazardous Areas and Atmospheres Accessing PC Boards Material ClassificationTypical Hazard Group Class Area Classification Removing RF Unit Removing Logic Unit Specifications General Controls and Display FeaturesTransceiver Operation TX Indicator Red Indicates when the transmitter is keyed Low-Battery Indicator Amber Display DisplayFront Panel Keys Full Keypad Model Turning Power on and Setting Volume Option SwitchesGeneral Operation Backlight See Option Switch FunctionsFunction Conv Tone ENABLE/DISABLE Scanning Conventional and SMARTNET/ Smartzone Operation Monitoring Before Transmitting Conventional FeaturesDisplay Mode Selection Call Guard Squelch Monitor ModeBusy Channel Lockout Penalty Timer Conversation TimerPower Output Select Conventional Mode Scanning Priority Channel Sampling DTMF/ANI Signaling Standard Conventional Calls SMARTNET/SMARTZONE Features Viewing Unit IDStandard Group Calls Enhanced Private Conversation Calls Transceiver Operation Private Conversation II Calls Telephone Calls Call Alert Sending Status Conditions Emergency Alarm and CallMessaging Dynamic Regrouping Failsoft OperationSMARTNET/SMARTZONE Scanning Supervisory Tones Zone Change Parameter Keypad ProgrammingMenu Description Channel Parameters Channel Change ParameterSystem Parameters Programming Setup Pctrunk Software InstallationTransceiver Programming Computer Description Connecting RPI to Computer and Transceiver Starting and ExitingProgramming File Types Help Files Screen Pop-Up Buttons and File Size Indicator Programming ProcedureFile Size Indication Creating and Displaying Systems Menu Commands Menu Bar Radio Type Menu Download Menu Upload MenuSystems Menu Window Menu Defaults RADIO-WIDE Parameter ScreensBand Zones Radio Wide Scan List Radio-Wide Scan List ScreenModify List Screen Assign Function Buttons RADIO-WIDE Conventional Screen RADIO-WIDE SMARTNET/SMARTZONE ScreenFull Spectrum CC Scan Hot Dtmf Adjustable Parameters RADIO-WIDE Portable Options ScreenProgramming Conventional Systems and Channels Conventional System General Screen Timers Conventional System Modify Scan List ScreenKeypad Editing Scan List Button Priority Channel Selection Scan TimersSetting UP Conventional Channels Conventional Channel Screen Parameters Selected Channel Transmit Power SignalingChannel Type Tx Time-Out Restricted Access Time-Out TimerISW Delay Time Splinter Channels SMARTNET/SMARTZONE System Other ID’S Screen SMARTNET/SMARTZONE System Phone Interconnect ScreenPhone Interconnect Private Call SMARTNET/SMARTZONE System Emergency Settings Screen Emergency AlarmSMARTNET/SMARTZONE System Talk Groups Screen Failsoft Channel Message Aliasing Screen SMARTNET/SMARTZONE System Lists ScreensTrunking Phone List Screen Announcement Groups Screen Control Channels Screen Trunking Call List Screen SMARTNET/SMARTZONE Channel Screen Parameters Setting UP SMARTNET/SMART- Zone ChannelsStatus Aliasing Screen SMARTNET/SmartZone Channel Screen Other Screen Parameters Call Guard CTCSS/DCS Codes and Tones Recommended Tone Call Guard Codes Freq MHz Channels MHz Channels MHz Channels MHz Channels MHz Channels MHz Channels Power Switching and Regulation Power SwitchingCircuit Description Synthesizer Description Charge Pump Q1, Q2, Loop Filter VCO and Tcxo ModulationSynthesizer Chip IC1 If Amplifier Q2, LIMITER/DETECTOR IC3 Receiver Circuit DescriptionRF Amplifier Q1, First Mixer Q2 Antenna Switch and LOW-PASS Filter Squelch Circuit IC4A/B, IC5ATransmitter Description Amplifier Q9, Driver Q8 Control Logic and Display Receive Audio Processing Microprocessor IC306 Pin Descriptions Pin Port Name Input or Description Active High Output Hvfulswlrq Receive Data FILTER/DETECTOR IC102A/B, IC107A/B Audio Amplifier IC104-IC106Receive and Transmit Data Processing Transmit Data Filter IC206B/ IC206A Transmit Audio Processing LOW-PASS Filter IC205A/B Smartnet Data Processing Battery Pack and Charger Information Battery PackPower Setting Operating Time Function Fahrenheit Celsius Battery Pack and Charger Information Alignment Procedure and Performance Tests Test Setup Tune Software Hqhudo Mm/3/32 Mm/1/8 Phone Jack Preliminary Setup Main Pctune Screen Transmit Frequency and Power Transmit Power Adjustment ScreenHigh Power Level = 3.0 watts Low Power Level = 1.0 watt Modulation Balance Squelch Adjust Rssi AdjustAudio Deviation Data Deviation Performance Tests Receiver Performance Tests Power Output Transmitter Performance TestsTransmit Frequency Transmit Modulation This page intentionally left blank Parts List Display AssemblyChassis Parts Ref No Description KEY Assembly Display Assembly If Assembly If AssemblyKEY Assembly PLL Assembly RF Unit RF Unit NJM2904V-TE1 IC RF Unit Logic Unit Logic Unit TDA7233D IC Logic Unit 200K ERJ3GE MP35 MP18 MP25 KEY Front Panel EP2 EP1 MP32 MP33 MP27 MP34 MP28 MP29 MP23 MP22 MP30 MP24 MP26 MP18 PLL Board Bottom View Schematic Diagrams and Component LayoutsPLL Board TOP View If Board TOP View If Board Bottom View Transceiver Block Diagram RF Unit RF Board TOP View MIC RF Board Schematic If AMP Logic Board TOP View HD1 Logic Board Schematic Receive Audio Processing Display Board Bottom View GND KEYR3 KEYR2 KEYR1 KEYR0 KEYS3 KEYS2 KEYS1 KEYS0 GND Display Board Schematic DS3 DS4 DS5 KEY Board Front View KEY Board Back View KEY Board Schematic S S R R R R Scan HC2 HC7 HC8 HC3 Schematic Diagrams and Component Layouts