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General| Brand | Realistic |
|---|---|
| Model | PRO-2021 |
| Category | Stereo Receiver |
| Language | English |
Lists required test equipment and notes for preparing the receiver for alignment procedures.
Step-by-step instructions for aligning the Intermediate Frequency section of the receiver.
Procedures for aligning the Voltage Controlled Oscillator across different frequency bands.
Steps for aligning the reference frequency oscillator for accurate tuning.
Specific alignment steps for the VHF Low Band RF amplifier.
Specific alignment steps for the Aircraft Band RF amplifier.
Specific alignment steps for the VHF High Band RF amplifier.
Specific alignment steps for the UHF Band RF amplifier.
Addresses issues with display not lighting, no sound, or both when the unit is powered on.
Covers problems related to the scanning function and squelch operation.
Details issues where specific frequency bands fail to operate while others function.
Addresses problems with the search mode not halting correctly on frequencies.
List of all capacitor components with their specifications and part numbers.
List of specialized capacitor arrays used in the device.
List of crystal oscillators and filter components.
List of all diode components, including varactors and zeners.
List of integrated circuits with their functions and part numbers.
List of inductor coils and transformers used in the circuitry.
List of all transistor components with their types and part numbers.
List of all resistor components with their values and specifications.
List of trimmer capacitors used for fine-tuning circuits.
List of potentiometers for volume and squelch control.
List of other components like connectors, wires, and accessories.
Diagrams showing pinouts and internal circuits for key integrated circuits.
Details specific component changes for European/Australian models.
Alignment procedures for the VHF-Mid band VCO on specific models.
Alignment procedures for the VHF-Mid band RF amplifier on specific models.
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