EFJohnson 001-9800-001 User Manual
Service manual 984, Uhf) 988, 800 mh
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Table of contents
Document Outline
- TABLE OF CONTENTS
- SECTION 1 GENERAL INFORMATION
- 1.1 SCOPE OF MANUAL
- 1.2 TRANSCEIVER DESCRIPTION
- 1.3 PART NUMBER BREAKDOWN
- 1.4 TRANSCEIVER IDENTIFICATION
- 1.5 ACCESSORIES
- 1.6 PRODUCT WARRANTY
- 1.7 FACTORY CUSTOMER SERVICE
- 1.8 FACTORY RETURNS
- 1.9 REPLACEMENT PARTS
- 1.10 INTERNET HOME PAGE
- 800 MHz 988x SPECIFICATIONS
- 900 MHz 989x SPECIFICATIONS
- UHF 984x SPECIFICATIONS
- SECTION 2 INSTALLATION
- SECTION 3 CIRCUIT DESCRIPTION
- 3.1 GENERAL TRANSCEIVER DESCRIPTION
- 3.2 POWER DISTRIBUTION AND SWITCHING
- 3.3 AUDIO/LOGIC BOARD DIGITAL CIRCUIT
- 3.4 RECEIVE AUDIO/DATA PROCESSING
- 3.5 TRANSMIT AUDIO/DATA PROCESSING
- 3.6 DISPLAY BOARD
- 3.7 SYNTHESIZER CIRCUIT DESCRIPTION (UHF MODELS)
- 3.8 RECEIVER CIRCUIT DESCRIPTION (UHF MODELS)
- 3.9 TRANSMITTER CIRCUIT DESCRIPTION (UHF MODELS)
- 3.10 SYNTHESIZER CIRCUIT DESCRIPTION (800/900 MHz MODELS)
- 3.10.1 Introduction
- 3.10.2 Voltage-Controlled Oscillator
- 3.10.3 VCO and TCXO Modulation
- 3.10.4 Active Filter (Q800)
- 3.10.5 Buffer Amplifier (Q801), Tx/Tx Switch (CR801/CR802)
- 3.10.6 Synthesizer Integrated Circuit (U804)
- 3.10.7 Lock Detect
- 3.10.8 Charge Pump
- 3.10.9 Shift Register (U800, U801) and Digital Potentiometer (U802) Programming
- 3.11 RECEIVER CIRCUIT DESCRIPTION (800/900 MHz MODELS)
- 3.12 TRANSMITTER CIRCUIT DESCRIPTION (800/900 MHz MODELS)
- SECTION 4 SERVICING
- SECTION 5 PARTS LIST
- SECTION 6 SCHEMATICS AND BOARD LAYOUTS