Download Print this page

Realistic PRO-2021 Service Manual

Hide thumbs Also See for PRO-2021:

Service manual (46 pages)

Table Of Contents

Table of Contents

Contents
Specifications
Block Diagram
Principles of Operation
General Operation Outline
Alignment and Test Points
Alignment Preparation
IF Section Alignment
VCO Alignment
Reference Frequency OSC Alignment
Aircraft HI Band and UHF Band
RF Amp Alignment
VHF lo Band
Aircraft Band
VHF-HI Band
UHF Band
Zeromatic Function and How to Check It
Zeromatic Function When Output Is in "H" Level
Keys Access Pulse Output (IC11)
PLL Data Waveform (IC11)
Reception Check Chart
Memory Check Chart
Troubleshooting
P.C. Boards (Top View)
P.C. Boards (Bottom View)
Wiring Diagram
Electrical Parts List
Capacitors List
Capacitor Array
Crystals & Filters List
Diodes List
Integrated Circuits List
Coils & Transformers List
Transistors List
Resistors List
Capacitors, Trimmer List
Variable Resistors
Miscellaneous
Disassembly/Exploded View
Mechanical Parts List
Semiconductor Lead Identification and IC Circuit Diagram
Integrated Circuit Lead Identification
Transistor Lead Identification
Diode Identification and Lead Polarity
Microprocessor (IC11) Port Format
VHS-MID Band Alignment for European/Australian Models
Circuit Revision
Schematic Diagram

Quick Links

1 Contents
2 Specifications
3 Principles of Operation
4 General Operation Outline
5 Schematic Diagram
Download this manual

Table of Contents

Need help?

Do you have a question about the PRO-2021 and is the answer not in the manual?

Questions and answers

RON RALEY

February 8, 2025

I HAVE A 200 CHANNEL PRO 2021 SCANNER WHEN I TURN IT ON IT WORKS BUT IT BEEPS EVERY 3 SECONDS HOW CAN I GET THAT BEEPING TO QUIT IS IT SOMETHING I DID WRONG? PLEASE HELP GOING NUTS HEARING IT

Realistic PRO-2021 Service Manual

Quick Links

Need help?

Questions and answers

Related Manuals for Realistic PRO-2021

Related Products for Realistic PRO-2021

Table of Contents