RF Board TOP View, Mic | EFJohnson 7780 guide

						R26
C35	D5	C36	R22	R25	C38	IC2
C35		C36	R22	R25	C38

R27	C41
R28	R29	C122

J1

MIC

JACK

C140

W1

L13 L34

C34	R21	R23
C33	D4

C37

D1

C1	L1
C30

	D2	HC14
C2	HC17	HC14	C43	R24	C44	R32	R33
	L2
							R34	R35
D3	D11				HC9		C45	C46
D3	D11

Q5	R36

R31	R30
C42	C40	C47
	Q6

C49 R39

	FI7
FI1	HC6
	HC6

HC5

Q21 Q20

R3

C4 L32

C31	Q7
	C111

C137

R37

C48

C50

W/N

FIOUT

		GND
		IF5V
		FIIN
		R5V
	BOARD	GND
		IFIN
		R5V
	TOIF	R5V
	TOIF	GND

HC2	Q19		C27	R96		HC3
HC2			C27	R96		R95

	C29	R102	R91		D15	D16
						D16
				R92
	HC7		D13

C28	R103
D14
HC8	R93
R94	C135

R98

C8

C9

R1

L9

C15

L10

C18

W4

R99

R2

C5

L5

HR1

C16

C17

C20

R6

W5

R4

R5

C25

C138

Q1 R104

C7

C11

L8

L7

L6

Q2 C14

	C13
C12	R7
W6	L11
	R9

L14

R20

C32

C59

HC20

C55

C54

FI4	Q14
	R77	D10
FI5
FI2
FI6

INFIN

GND

XTAL RSSI NOISE DET

	C126	FI3
	C26	C76
	R101	R53
	R101	C78
		C78
	C139	C77

	C19
	C10
	R51
R97
L19	C75
	C75
Q10	R50
	R50

C117		R10
R78		R11	C125
R12	C24	C23	Q17
	C22	L12	Q17
	C22	L12
D7	R79		C124

L29

C72

R49

R48

HC16

C109

	HC18		R54
	HC18
	C105		L20
C112	C105	C106	Q11

	C79	R52	C69	Q9	R80
	C127	C73	R47	Q9	R80
	C127	C73	R47
	R85		C70		C120

IC1

L33

L26

C52

L25

HC12

C91

IC4

C53	C95
	C95
	C94	L30
C97		C133	C134
C97
		L28	C132
R75	X3	C128	Q18
	X3	C128
R76		R87	C131	C104
R76		C130	L27	C104
		C130	L27

C108

R5V

DET

NOISE

RSSI

W/N

PLLST

PLLSO

PLLSK

RF5C

GND

VCC

VCC

GND

GND

GND

HC10

			C93	R56
			C93	R60
		PWR		R60
		PWR
BOARD		TMUT		R61
		T5V		R61
		LTR		R62
		MOD		R62
		+5V
		LOCKUP
J1 LOGIC		LOCKUP		C82
		ULOCK	C107	C82
		GND
		GND		Q12
		BATT
		BATT
TO		BATT
		BATT	C83
		BATT		L22
				L22
HC1	C103	C84	R66	C102	C101

	R55		C114		C71		R46	L17		Q16
	C80		C74		C67		R46	C66		Q16
	C80		C74		C67			C66
	R57		R69		C68					C121
	R58		C90		L16			Q8
	R59		Q13		C64					L24
	C81		Q13	D6						L24
	C81			D6
	R65		C85	R45	C65	R44	R83	C63	L15	C62
	R64		C89	R45	C65	R44	R83	C63	L15	C62
	R64		C89
	R63		W3	HW2		HC13			C57
			D9						C57
			D9
C100	R68	R67	C136	C98	L23				C58	R82

FIN	GND	PLLSK	PLLSO PLLST LOCKUP LD	LO	GND	RF5V	LV	GND
								RF BOARD BOTTOM VIEW
			TO PLL BOARD

RF BOARD TOP VIEW

R74

R41

R42

R43

C119

C60

R72

R73

C96

HC15

R86

C129

IC3

C88

RF5V

RF5C

GND

VCC VCOV

CPV

November 1999	8-4
Part No. 001-7780-500

Image 104

EFJohnson 7780 service manual RF Board TOP View, Mic

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 Accessories Factory Customer ServicePart Number Breakdown Transceiver Identification Accessories AccessoryToll-Free 800 Factory Returns Definitions Replacement PartsInternet Home Intrinsically Safe Information Temperature Code T3C Possible Ignition SourcesIntrinsically Safe and Nonincendive Ratings Classification of Hazardous Areas and Atmospheres Accessing PC Boards Material ClassificationTypical Hazard Group Class 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 Turning Power on and Setting Volume Option SwitchesGeneral Operation 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 Penalty Timer Conversation TimerPower Output Select Conventional Mode Scanning Priority Channel Sampling DTMF/ANI Signaling Standard Conventional Calls SMARTNET/SMARTZONE Features Viewing Unit IDStandard Group Calls 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 Programming Setup Pctrunk Software InstallationTransceiver Programming Computer Description Connecting RPI to Computer and Transceiver Starting and ExitingProgramming File Types Help Files Screen Pop-Up Buttons and File Size Indicator Programming ProcedureFile Size Indication Creating and Displaying Systems Menu Commands Menu Bar Radio Type Menu Download Menu Upload MenuSystems Menu Window Menu Defaults RADIO-WIDE Parameter ScreensBand Zones Radio Wide Scan List Radio-Wide Scan List ScreenModify List Screen Assign Function Buttons RADIO-WIDE Conventional Screen RADIO-WIDE SMARTNET/SMARTZONE ScreenFull Spectrum CC Scan Hot Dtmf Adjustable Parameters RADIO-WIDE Portable Options ScreenProgramming Conventional Systems and Channels Conventional System General Screen Timers Conventional System Modify Scan List ScreenKeypad Editing Scan List Button Priority Channel Selection Scan TimersSetting UP Conventional Channels Conventional Channel Screen Parameters Selected Channel Transmit Power SignalingChannel Type Tx Time-Out Restricted Access Time-Out TimerISW Delay Time Splinter Channels SMARTNET/SMARTZONE System Other ID’S Screen SMARTNET/SMARTZONE System Phone Interconnect ScreenPhone Interconnect Private Call SMARTNET/SMARTZONE System Emergency Settings Screen Emergency AlarmSMARTNET/SMARTZONE System Talk Groups Screen 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 Power Switching and Regulation Power SwitchingCircuit Description 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 Antenna Switch and LOW-PASS Filter Squelch Circuit IC4A/B, IC5ATransmitter Description 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 Battery Pack and Charger Information Battery PackPower Setting Operating Time 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 Transmit Frequency and Power Transmit Power Adjustment ScreenHigh Power Level = 3.0 watts Low Power Level = 1.0 watt Modulation Balance Squelch Adjust Rssi AdjustAudio Deviation Data Deviation Performance Tests Receiver Performance Tests Power Output Transmitter Performance TestsTransmit Frequency Transmit Modulation This page intentionally left blank Parts List Display AssemblyChassis Parts 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