KEY Front Panel, EP2 | EFJohnson 7780 specs

PARTS LIST

	Display Board
	EP3
MP9 (4)	(Display)	EP2
MP9 (4)		EP2
(Display)		(Display)
		DS6
MP15		(Display)
MP15
(Display)		MP7
		(Display)
MP12 (4)
Display)
MP8	Display Board
(Display)	Display Board
MP16
(Display)	MP10 (4)
	(Display)
	10-Key Board	MP4
		(Display)

	F1
SP1
(10-Key)
MP6
(Display)	F3

	MC1
	(10-Key)
	MP15
3-Key	(Display)
Board
MP4
(Display)	MP11
	MP11
	(Display)
	MP1
	(Display)

10-KEY FRONT PANEL

MP10 (2) (Display)

MC1 (3-Key Bd)

MP6

SP1 (Display)

(3-key Bd)

MP11

(Display)

ENT

MP1

3-KEY FRONT PANEL

(Display)

November 1999
Part No. 001-7780-500	7-14

Image 98

EFJohnson 7780 service manual KEY Front Panel, EP2

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 Part Number Breakdown AccessoriesFactory Customer Service Transceiver Identification Toll-Free 800 AccessoriesAccessory Factory Returns Definitions Replacement PartsInternet Home Intrinsically Safe Information Intrinsically Safe and Nonincendive Ratings Temperature Code T3CPossible Ignition Sources Classification of Hazardous Areas and Atmospheres Typical Hazard Group Class Accessing PC BoardsMaterial Classification 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 General Operation Turning Power on and Setting VolumeOption Switches 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 Power Output Select Penalty TimerConversation Timer Conventional Mode Scanning Priority Channel Sampling DTMF/ANI Signaling Standard Conventional Calls Standard Group Calls SMARTNET/SMARTZONE FeaturesViewing Unit ID 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 Transceiver Programming Programming SetupPctrunk Software Installation Computer Description Programming File Types Connecting RPI to Computer and TransceiverStarting and Exiting Help Files File Size Indication Screen Pop-Up Buttons and File Size IndicatorProgramming Procedure Creating and Displaying Systems Menu Commands Menu Bar Systems Menu Radio Type MenuDownload Menu Upload Menu Window Menu Band DefaultsRADIO-WIDE Parameter Screens Zones Modify List Screen Radio Wide Scan ListRadio-Wide Scan List Screen Assign Function Buttons Full Spectrum CC Scan RADIO-WIDE Conventional ScreenRADIO-WIDE SMARTNET/SMARTZONE Screen Hot Dtmf Programming Conventional Systems and Channels Adjustable ParametersRADIO-WIDE Portable Options Screen Conventional System General Screen Keypad Editing TimersConventional System Modify Scan List Screen Scan List Button Priority Channel Selection Scan TimersSetting UP Conventional Channels Conventional Channel Screen Parameters Selected Channel Channel Type Transmit PowerSignaling Tx Time-Out ISW Delay Time Restricted AccessTime-Out Timer Splinter Channels Phone Interconnect SMARTNET/SMARTZONE System Other ID’S ScreenSMARTNET/SMARTZONE System Phone Interconnect Screen Private Call SMARTNET/SMARTZONE System Talk Groups Screen SMARTNET/SMARTZONE System Emergency Settings ScreenEmergency Alarm 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 Circuit Description Power Switching and RegulationPower Switching 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 Transmitter Description Antenna Switch and LOW-PASS FilterSquelch Circuit IC4A/B, IC5A 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 Power Setting Operating Time Battery Pack and Charger InformationBattery Pack 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 High Power Level = 3.0 watts Low Power Level = 1.0 watt Transmit Frequency and PowerTransmit Power Adjustment Screen Modulation Balance Audio Deviation Squelch AdjustRssi Adjust Data Deviation Performance Tests Receiver Performance Tests Transmit Frequency Power OutputTransmitter Performance Tests Transmit Modulation This page intentionally left blank Chassis Parts Parts ListDisplay Assembly 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