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EFJohnson 7780 3-KEY BOARD FRONT VIEW, 3-KEY BOARD BACK VIEW

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SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS

8-12

November 1999

Part No. 001-7780-500

SPEAKER

MICROPHONE

HC8

HC7

HC6

HC5

HC1

HC4

HC3

HC2

20 2

DS1

DS2

SCAN A/D

( ) MENU

3-KEY BOARD FRONT VIEW3-KEY BOARD BACK VIEW

Contents

Main Series Page Page TABLE OF CONTENTS 1 GENERAL INFORMATION 2 TRANSCEIVER OPERATION 3 TRANSCEIVER PROGRAMMING TABLE OF CONTENTS (CONTD) 4 CIRCUIT DESCRIPTION 5 BATTERY PACK AND CHARGER INFORMATION 6 ALIGNMENT PROCEDURE AND PERFORMANCE TESTS TABLE OF CONTENTS (CONTD) 7 PARTS LIST 8 SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS LIST OF TABLES LIST OF FIGURES SECTION 1 GENERAL INFORMATION Page Page WAR NING Page Page 7780 SPECIFICATIONS RECEIVER TRANSMITTER Page * Page Page Page Page Page Page Page Page Page Page Page Page ** Page Page Page Page SECTION 3 TRANSCEIVER PROGRAMMING Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page SECTION 4 CIRCUIT DESCRIPTION Page Page Page Page Table 4-1 Microprocessor IC306 Pin Descriptions Pin Name Port Name Input or Output Description Active High or Low Table 4-1 Microprocessor IC306 Pin Descriptions (Continued) 3LQ 1DPH 3RUW1DPH ,QSXWRU RU/RZ 2XWSXW 'HVFULSWLRQ $FWLYH+LJK Page Page Page SECTION 5 BATTERY PACK AND CHARGER INFORMATION CAUTION Page SECTION 6 ALIGNMENT PROCEDURE AND PERFORMANCE TESTS Page Page Page PERFORMANCE TESTS Page Page SECTION 7 PARTS LIST RefNo. Description PartNo. CHASSIS PARTS JACK ASSEMBLY DISPLAY ASSEMBLY 3-KEY ASSEMBLY DISPLAY ASSEMBLY 10-KEY ASSEMBLY IF ASSEMBLY 10-KEY ASSEMBLY IF ASSEMBLY Ref No. Description PartNo. RefNo. Description PartNo. PLL ASSEMBLY IF ASSEMBLY Ref No. Description PartNo. RF UNIT Page Page Page LOGIC UNIT RF UNIT LOGIC UNIT Page Page Page Page Page PARTS LIST 7-14 10-KEY FRONT PANEL 3-KEY FRONT PANEL PARTS LIST 7-15 November 1999 Page 8-1 November 1999 SECTION 8 SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS C4 PLL BOARD BOTTOM VIEW Q1 C1 R8 R9 HC2 IF BOARD TOP VIEW IF BOARD BOTTOM VIEW RF UNIT 8-3 TRANSCEIVER BLOCK DIAGRAM IF BOARD PLL BOARD RECEIVER RF BOARD TOP VIEWRF BOARD BOTTOMVIEW Part No. 001-7780-500 8-4 PLL BOARD IF AMP 8-5 RF BOARD SCHEMATIC TO ACCESSORY JACK Channel Switch 8-6 LOGICBOARDTOPVIEW TO PTT BOARD LOGIC BOARD SCHEMATIC 8-7 DISPLAY BOARDTOP VIEWDISPLAY BOARDBOTTOM VIEW 8-8 DISPLAY BOARD SCHEMATIC 8-9 November 1999 * 8-11 November 1999 * 10-KEY BOARD SCHEMATIC Microphone Speaker F1 F2 SCAN A/D ( ) MENU 3-KEY BOARD FRONT VIEW 3-KEY BOARD BACK VIEW 8-13 November 1999 F1 F2 F3 3-KEY BOARD SCHEMATIC Microphone Speaker