EFJohnson 7780 Display Board Bottom View, GND KEYR3 KEYR2 KEYR1 KEYR0 KEYS3 KEYS2 KEYS1 KEYS0 GND

Page 108

Tx LED

DS3

Busy LED

DS4

Batt LED

DS5

R8

C2

R9

C7	HR2	R3
C5	C6	R18	R7
C4	HR3	HR1

DS7

DS2

R14

R12

R16

C3

R17

DS6

DS8

R2	IC1

DS1	C1

R11	Q2	R15
	Q2
R13	Q3	R1
	Q3

Q4

Q1

GND KEYR3

KEYR2

KEYR1 KEYR0

KEYS3 KEYS2

KEYS1 KEYS0 GND

2

20

J2

GND GND SPE SPE SP

SP

L5V

DISSO

DISSK

DISST

DISEN

KEYS0

KEYS1

KEYS2

KEYS3 KEYR0

KEYR1

KEYR2

KEYR3

TXLED

BSYLED

BATLED

BKLED

GND

MICE

MIC

GND

GND

GND

29

1

J1

1									19
MIC	MICE	GND	GND	BKLED	L5V	GND	GND	SP	SPE

DISPLAY BOARD BOTTOM VIEW

DISPLAY BOARD TOP VIEW

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

Image 108

Contents 7780 Page Page Table of Contents Table of Contents CONT’D List of Tables List of FiguresGeneral Information Scope of Manual Equipment DescriptionAccessories Factory Customer ServicePart Number Breakdown Transceiver IdentificationAccessories AccessoryToll-Free 800 Factory ReturnsReplacement Parts Internet Home Intrinsically Safe InformationDefinitions Temperature Code T3C Possible Ignition SourcesIntrinsically Safe and Nonincendive Ratings Classification of Hazardous Areas and AtmospheresAccessing PC Boards Material ClassificationTypical Hazard Group Class 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 Turning Power on and Setting Volume Option SwitchesGeneral Operation 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 Penalty Timer Conversation TimerPower Output Select Conventional Mode ScanningPriority Channel Sampling DTMF/ANI Signaling Standard Conventional CallsSMARTNET/SMARTZONE Features Viewing Unit IDStandard Group Calls 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 Programming Setup Pctrunk Software InstallationTransceiver Programming Computer DescriptionConnecting RPI to Computer and Transceiver Starting and ExitingProgramming File Types Help FilesScreen Pop-Up Buttons and File Size Indicator Programming ProcedureFile Size Indication Creating and Displaying SystemsMenu Commands Menu BarRadio Type Menu Download Menu Upload MenuSystems Menu Window MenuDefaults RADIO-WIDE Parameter ScreensBand ZonesRadio Wide Scan List Radio-Wide Scan List ScreenModify List Screen Assign Function ButtonsRADIO-WIDE Conventional Screen RADIO-WIDE SMARTNET/SMARTZONE ScreenFull Spectrum CC Scan Hot DtmfAdjustable Parameters RADIO-WIDE Portable Options ScreenProgramming Conventional Systems and Channels Conventional System General ScreenTimers Conventional System Modify Scan List ScreenKeypad Editing Scan List ButtonScan Timers Setting UP Conventional ChannelsPriority Channel Selection Conventional Channel Screen Parameters Selected ChannelTransmit Power SignalingChannel Type Tx Time-OutRestricted Access Time-Out TimerISW Delay Time Splinter ChannelsSMARTNET/SMARTZONE System Other ID’S Screen SMARTNET/SMARTZONE System Phone Interconnect ScreenPhone Interconnect Private CallSMARTNET/SMARTZONE System Emergency Settings Screen Emergency AlarmSMARTNET/SMARTZONE System Talk Groups Screen 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 Power Switching and Regulation Power SwitchingCircuit Description 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 Antenna Switch and LOW-PASS Filter Squelch Circuit IC4A/B, IC5ATransmitter Description 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 ProcessingBattery Pack and Charger Information Battery PackPower Setting Operating Time 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 ScreenTransmit Frequency and Power Transmit Power Adjustment ScreenHigh Power Level = 3.0 watts Low Power Level = 1.0 watt Modulation BalanceSquelch Adjust Rssi AdjustAudio Deviation Data DeviationPerformance Tests Receiver Performance TestsPower Output Transmitter Performance TestsTransmit Frequency Transmit ModulationThis page intentionally left blank Parts List Display AssemblyChassis Parts 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