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Tandy Radio Shack Realistic PRO-2021 - User Manual

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I
~EALI.s::C®
IervIce
PRO-2021
PROGRAMMABLE
SCANNER
AM
/FM
MONITOR
RECEIVER
Catalog
Nurnber:
20-113
CUSTOM
MANUFACTURED
FOR
RADIO
SHACK.
A
DIVISION
OF
TANDY
CORPORATION
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Summary

SPECIFICATIONS

BLOCK DIAGRAM

PRINCIPLES OF OPERATION

GENERAL OPERATION OUTLINE

ALIGNMENT AND TEST POINTS

ALIGNMENT PREPARATION

Lists the necessary test equipment and preparation steps for device alignment.

IF SECTION ALIGNMENT

Detailed procedure for aligning the Intermediate Frequency section of the receiver.

VCO ALIGNMENT

Steps to align the Voltage Controlled Oscillator for different frequency bands.

REFERENCE FREQUENCY OSC ALIGNMENT

Procedure to align the reference frequency oscillator for accurate tuning.

RF AMP ALIGNMENT

VHF LO BAND

Steps for aligning the Radio Frequency amplifier for the VHF Low band.

AIRCRAFT BAND

Steps for aligning the Radio Frequency amplifier for the Aircraft band.

VHF-HI BAND

Steps for aligning the Radio Frequency amplifier for the VHF High band.

UHF BAND

Steps for aligning the Radio Frequency amplifier for the UHF band.

ZEROMATIC FUNCTION AND HOW TO CHECK IT

RECEPTION CHECK

MEMORY CHECK

TROUBLESHOOTING

P.C. BOARDS (TOP AND BOTTOM VIEWS)

WIRING DIAGRAM

ELECTRICAL PARTS LIST

CAPACITORS

Lists capacitor components with their specifications and part numbers.

CRYSTALS & FILTERS

Lists crystal and filter components with their specifications and part numbers.

DIODES

Lists diode components with their specifications and part numbers.

INTEGRATED CIRCUITS

Lists integrated circuit components with their specifications and part numbers.

TRANSISTORS

Lists transistor components with their specifications and part numbers.

RESISTORS

Lists resistor components with their specifications and part numbers.

MECHANICAL PARTS LIST

SEMICONDUCTOR LEAD IDENTIFICATION AND IC CIRCUIT DIAGRAM

INTEGRATED CIRCUIT LEAD IDENTIFICATION

Provides pinout diagrams and identification for integrated circuits.

TRANSISTOR LEAD IDENTIFICATION

DIODE IDENTIFICATION AND LEAD POLARITY

MICROPROCESSOR (IC11) PORT FORMAT

APPENDIX

VHF-MID Band Alignment for European;Australian models

Specific alignment procedures for European/Australian models of the VHF-MID band.

CIRCUIT REVISION

Details component changes required for a specific circuit revision.

VCO ALIGNMENT

Alignment steps for the Voltage Controlled Oscillator for European/Australian models.

RF AMP ALIGNMENT

Alignment steps for the Radio Frequency amplifier for European/Australian models.

Tandy Radio Shack Realistic PRO-2021 Specifications

General IconGeneral
TypeScanner Receiver
Modulation TypesAM, FM, WFM
Channels200
Power Supply13.8V DC
Dimensions2 7/8 x 7 1/2 x 7 1/4 inches (72 x 191 x 184 mm)
Weight3.3 lbs (1.5 kg)
Memory200 channels