If Board TOP View, If Board Bottom View | EFJohnson 7780 specification

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

Image 102

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

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 Replacement Parts Internet Home Intrinsically Safe InformationDefinitions 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 Features Transceiver OperationControls and Display TX Indicator Red Indicates when the transmitter is keyed Low-Battery Indicator Amber Display Front Panel Keys Full Keypad ModelDisplay General Operation Turning Power on and Setting VolumeOption Switches Backlight Option Switch Functions Function ConvSee Tone ENABLE/DISABLE Scanning Conventional 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 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 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 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 Scan Timers Setting UP Conventional ChannelsPriority Channel Selection 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 SMARTNET/SMARTZONE System Lists Screens Trunking Phone List ScreenMessage Aliasing Screen Announcement Groups Screen Control Channels Screen Trunking Call List Screen Setting UP SMARTNET/SMART- Zone Channels Status Aliasing ScreenSMARTNET/SMARTZONE Channel Screen Parameters 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 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 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 Audio Amplifier IC104-IC106 Receive and Transmit Data ProcessingReceive Data FILTER/DETECTOR IC102A/B, IC107A/B 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 KEY AssemblyIf 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 Schematic Diagrams and Component Layouts PLL Board TOP ViewPLL Board Bottom 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