EP1

PARTS LIST

MP37 (2)

(RF Board)

MP3 (RF Unit)

MP47 (4)

EP2 (Chassis)

MP10

MP6

MP7

MP2

MP8

MP45

MP36 (4)

MP4 (2)

(Chassis)

MP49MP1

EP1

(Chassis)

MP39 (4)

MP12

MP5

	MP13	MP17
MP4 (2)	(Chassis)	(Chassis)
MP4 (2)
(Jack Assy)

MP3

EP1

(Jack Assy)

J1/MP5 (Jack Assy)

	MP50	MP16 (2)
	(Pad)
		(Chassis)

MP1

(Jack Assy)

MP2

(Jack Assy)

MP3

(Jack Assy)

		EP2
	MP46	(Logic Assy)
	MP46	EP1
		EP1
		(Logic Board)

	November 1999
7-15	Part No. 001-7780-500

Page 99

Image 99

Contents

7780 Page Page Table of Contents Table of Contents CONT’D List of Figures List of Tables Scope of Manual Equipment Description General Information Transceiver Identification AccessoriesFactory Customer Service Part Number Breakdown Factory Returns AccessoriesAccessory Toll-Free 800 Replacement Parts Internet Home Intrinsically Safe InformationDefinitions Classification of Hazardous Areas and Atmospheres Temperature Code T3CPossible Ignition Sources Intrinsically Safe and Nonincendive Ratings Area Classification Accessing PC BoardsMaterial Classification Typical Hazard Group Class Removing Logic Unit Removing RF Unit General Specifications Features Transceiver OperationControls and Display Low-Battery Indicator Amber TX Indicator Red Indicates when the transmitter is keyed Display Front Panel Keys Full Keypad ModelDisplay Backlight Turning Power on and Setting VolumeOption Switches General Operation Option Switch Functions Function ConvSee Scanning Tone ENABLE/DISABLE Conventional and SMARTNET/ Smartzone Operation Conventional Features Display Mode SelectionMonitoring Before Transmitting Monitor Mode Busy Channel LockoutCall Guard Squelch Conventional Mode Scanning Penalty TimerConversation Timer Power Output Select Priority Channel Sampling Standard Conventional Calls DTMF/ANI Signaling Enhanced Private Conversation Calls SMARTNET/SMARTZONE FeaturesViewing Unit ID Standard Group Calls Transceiver Operation Private Conversation II Calls Telephone Calls Call Alert Emergency Alarm and Call MessagingSending Status Conditions Failsoft Operation SMARTNET/SMARTZONE ScanningDynamic Regrouping Supervisory Tones Keypad Programming Menu DescriptionZone Change Parameter Channel Change Parameter System ParametersChannel Parameters Computer Description Programming SetupPctrunk Software Installation Transceiver Programming Help Files Connecting RPI to Computer and TransceiverStarting and Exiting Programming File Types Creating and Displaying Systems Screen Pop-Up Buttons and File Size IndicatorProgramming Procedure File Size Indication Menu Bar Menu Commands Window Menu Radio Type MenuDownload Menu Upload Menu Systems Menu Zones DefaultsRADIO-WIDE Parameter Screens Band Assign Function Buttons Radio Wide Scan ListRadio-Wide Scan List Screen Modify List Screen Hot Dtmf RADIO-WIDE Conventional ScreenRADIO-WIDE SMARTNET/SMARTZONE Screen Full Spectrum CC Scan Conventional System General Screen Adjustable ParametersRADIO-WIDE Portable Options Screen Programming Conventional Systems and Channels Scan List Button TimersConventional System Modify Scan List Screen Keypad Editing Scan Timers Setting UP Conventional ChannelsPriority Channel Selection Selected Channel Conventional Channel Screen Parameters Tx Time-Out Transmit PowerSignaling Channel Type Splinter Channels Restricted AccessTime-Out Timer ISW Delay Time Private Call SMARTNET/SMARTZONE System Other ID’S ScreenSMARTNET/SMARTZONE System Phone Interconnect Screen Phone Interconnect Failsoft Channel SMARTNET/SMARTZONE System Emergency Settings ScreenEmergency Alarm SMARTNET/SMARTZONE System Talk Groups Screen SMARTNET/SMARTZONE System Lists Screens Trunking Phone List ScreenMessage Aliasing Screen Control Channels Screen Announcement Groups Screen Trunking Call List Screen Setting UP SMARTNET/SMART- Zone Channels Status Aliasing ScreenSMARTNET/SMARTZONE Channel Screen Parameters Other Screen Parameters SMARTNET/SmartZone Channel Screen Recommended Tone Call Guard Codes Freq Call Guard CTCSS/DCS Codes and Tones MHz Channels MHz Channels MHz Channels MHz Channels MHz Channels MHz Channels Synthesizer Description Power Switching and RegulationPower Switching Circuit Description VCO and Tcxo Modulation Synthesizer Chip IC1Charge Pump Q1, Q2, Loop Filter Receiver Circuit Description RF Amplifier Q1, First Mixer Q2If Amplifier Q2, LIMITER/DETECTOR IC3 Amplifier Q9, Driver Q8 Antenna Switch and LOW-PASS FilterSquelch Circuit IC4A/B, IC5A Transmitter Description Receive Audio Processing Control Logic and Display Pin Port Name Input or Description Active High Output Microprocessor IC306 Pin Descriptions Hvfulswlrq Audio Amplifier IC104-IC106 Receive and Transmit Data ProcessingReceive Data FILTER/DETECTOR IC102A/B, IC107A/B Transmit Audio Processing Transmit Data Filter IC206B/ IC206A Smartnet Data Processing LOW-PASS Filter IC205A/B Function Fahrenheit Celsius Battery Pack and Charger InformationBattery Pack Power Setting Operating Time Battery Pack and Charger Information Test Setup Alignment Procedure and Performance Tests Mm/3/32 Mm/1/8 Phone Jack Tune Software Hqhudo Main Pctune Screen Preliminary Setup Modulation Balance Transmit Frequency and PowerTransmit Power Adjustment Screen High Power Level = 3.0 watts Low Power Level = 1.0 watt Data Deviation Squelch AdjustRssi Adjust Audio Deviation Receiver Performance Tests Performance Tests Transmit Modulation Power OutputTransmitter Performance Tests Transmit Frequency This page intentionally left blank Ref No Description Parts ListDisplay Assembly Chassis Parts Display Assembly KEY Assembly If Assembly KEY AssemblyIf Assembly RF Unit PLL Assembly RF Unit NJM2904V-TE1 IC RF Unit Logic Unit Logic Unit TDA7233D IC Logic Unit 200K ERJ3GE MP35 MP18 MP25 EP2 KEY Front Panel EP1 MP32 MP33 MP27 MP34 MP28 MP29 MP23 MP22 MP30 MP24 MP26 MP18 Schematic Diagrams and Component Layouts PLL Board TOP ViewPLL Board Bottom View If Board Bottom View If Board TOP View RF Unit Transceiver Block Diagram MIC RF Board TOP View If AMP RF Board Schematic HD1 Logic Board TOP View Receive Audio Processing Logic Board Schematic GND KEYR3 KEYR2 KEYR1 KEYR0 KEYS3 KEYS2 KEYS1 KEYS0 GND Display Board Bottom View DS3 DS4 DS5 Display Board Schematic KEY Board Back View KEY Board Front View S S R R R R KEY Board Schematic Scan HC2 HC7 HC8 HC3 Schematic Diagrams and Component Layouts

EFJohnson 7780 service manual EP1

Models: 7780

EP1