EFJohnson 7780 service manual If Board TOP View, If Board Bottom View

Page 102

SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS

		C7		C1
		C6		C4
CPV	VCOV	VCC	GND	RF5C	RF5V

R15	R14	R22
R16	HC1	C30

C33	R24	R28	R27	D3
				D3
				C10
Q4		R29		L2

	C35	HR1	C25	Q2
			R21
				C9

C14
C11	R4	IC3
		IC3
C12	R5

C18 C13

	R9
C23
C29	R18	R17
R19	C20	C21	GND

IF BOARD TOP VIEW

C19 HW1

R8

C16

C17

C32

Q3	X1
	X1
	R7
	C15

	C24	R25	R26
	C24	R13
	C26		R12
	R23	R20	R12
	R23	R20

IC1

C3 C31

C8 C2

IC2 D2

R2

C5

Q1

HC2

W/N

FIOUT

GND

IF5V

FIIN

R5V

GND

IFIN

GND

XTAL

RSSI

NOISE

DET

SQLC

IF BOARD BOTTOM VIEW

November 1999
Part No. 001-7780-500	8-2

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Contents 7780 Page Page Table of Contents Table of Contents CONT’D List of Tables List of FiguresGeneral Information Scope of Manual Equipment DescriptionPart Number Breakdown AccessoriesFactory Customer Service Transceiver IdentificationToll-Free 800 AccessoriesAccessory Factory ReturnsReplacement Parts Internet Home Intrinsically Safe InformationDefinitions Intrinsically Safe and Nonincendive Ratings Temperature Code T3CPossible Ignition Sources Classification of Hazardous Areas and AtmospheresTypical Hazard Group Class Accessing PC BoardsMaterial Classification Area ClassificationRemoving RF Unit Removing Logic UnitSpecifications GeneralFeatures Transceiver OperationControls and Display TX Indicator Red Indicates when the transmitter is keyed Low-Battery Indicator AmberDisplay Front Panel Keys Full Keypad ModelDisplay General Operation Turning Power on and Setting VolumeOption Switches BacklightOption Switch Functions Function ConvSee Tone ENABLE/DISABLE ScanningConventional and SMARTNET/ Smartzone Operation Conventional Features Display Mode SelectionMonitoring Before Transmitting Monitor Mode Busy Channel LockoutCall Guard Squelch Power Output Select Penalty TimerConversation Timer Conventional Mode ScanningPriority Channel Sampling DTMF/ANI Signaling Standard Conventional CallsStandard Group Calls SMARTNET/SMARTZONE FeaturesViewing Unit ID Enhanced Private Conversation CallsTransceiver 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 Transceiver Programming Programming SetupPctrunk Software Installation Computer DescriptionProgramming File Types Connecting RPI to Computer and TransceiverStarting and Exiting Help FilesFile Size Indication Screen Pop-Up Buttons and File Size IndicatorProgramming Procedure Creating and Displaying SystemsMenu Commands Menu BarSystems Menu Radio Type MenuDownload Menu Upload Menu Window MenuBand DefaultsRADIO-WIDE Parameter Screens ZonesModify List Screen Radio Wide Scan ListRadio-Wide Scan List Screen Assign Function ButtonsFull Spectrum CC Scan RADIO-WIDE Conventional ScreenRADIO-WIDE SMARTNET/SMARTZONE Screen Hot DtmfProgramming Conventional Systems and Channels Adjustable ParametersRADIO-WIDE Portable Options Screen Conventional System General ScreenKeypad Editing TimersConventional System Modify Scan List Screen Scan List ButtonScan Timers Setting UP Conventional ChannelsPriority Channel Selection Conventional Channel Screen Parameters Selected ChannelChannel Type Transmit PowerSignaling Tx Time-OutISW Delay Time Restricted AccessTime-Out Timer Splinter ChannelsPhone Interconnect SMARTNET/SMARTZONE System Other ID’S ScreenSMARTNET/SMARTZONE System Phone Interconnect Screen Private CallSMARTNET/SMARTZONE System Talk Groups Screen SMARTNET/SMARTZONE System Emergency Settings ScreenEmergency Alarm Failsoft ChannelSMARTNET/SMARTZONE System Lists Screens Trunking Phone List ScreenMessage Aliasing Screen Announcement Groups Screen Control Channels ScreenTrunking Call List Screen Setting UP SMARTNET/SMART- Zone Channels Status Aliasing ScreenSMARTNET/SMARTZONE Channel Screen Parameters SMARTNET/SmartZone Channel Screen Other Screen ParametersCall Guard CTCSS/DCS Codes and Tones Recommended Tone Call Guard Codes FreqMHz Channels MHz Channels MHz Channels MHz Channels MHz Channels MHz Channels Circuit Description Power Switching and RegulationPower Switching Synthesizer DescriptionVCO 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 Transmitter Description Antenna Switch and LOW-PASS FilterSquelch Circuit IC4A/B, IC5A Amplifier Q9, Driver Q8Control Logic and Display Receive Audio ProcessingMicroprocessor IC306 Pin Descriptions Pin Port Name Input or Description Active High OutputHvfulswlrq Audio Amplifier IC104-IC106 Receive and Transmit Data ProcessingReceive Data FILTER/DETECTOR IC102A/B, IC107A/B Transmit Data Filter IC206B/ IC206A Transmit Audio ProcessingLOW-PASS Filter IC205A/B Smartnet Data ProcessingPower Setting Operating Time Battery Pack and Charger InformationBattery Pack Function Fahrenheit CelsiusBattery Pack and Charger Information Alignment Procedure and Performance Tests Test SetupTune Software Hqhudo Mm/3/32 Mm/1/8 Phone JackPreliminary Setup Main Pctune ScreenHigh Power Level = 3.0 watts Low Power Level = 1.0 watt Transmit Frequency and PowerTransmit Power Adjustment Screen Modulation BalanceAudio Deviation Squelch AdjustRssi Adjust Data DeviationPerformance Tests Receiver Performance TestsTransmit Frequency Power OutputTransmitter Performance Tests Transmit ModulationThis page intentionally left blank Chassis Parts Parts ListDisplay Assembly Ref No DescriptionKEY Assembly Display AssemblyIf Assembly KEY AssemblyIf Assembly PLL Assembly RF UnitRF Unit NJM2904V-TE1 IC RF Unit Logic Unit Logic Unit TDA7233D IC Logic Unit 200K ERJ3GE MP35 MP18 MP25 KEY Front Panel EP2EP1 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 TOP View If Board Bottom ViewTransceiver Block Diagram RF UnitRF Board TOP View MICRF Board Schematic If AMPLogic Board TOP View HD1Logic Board Schematic Receive Audio ProcessingDisplay Board Bottom View GND KEYR3 KEYR2 KEYR1 KEYR0 KEYS3 KEYS2 KEYS1 KEYS0 GNDDisplay Board Schematic DS3 DS4 DS5KEY Board Front View KEY Board Back ViewKEY Board Schematic S S R R R RScan HC2 HC7 HC8 HC3 Schematic Diagrams and Component Layouts