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Step-by-step procedure for adjusting the regulated power supply board.
Procedure for calibrating the level meter for accurate readings.
Procedure for adjusting the driver circuit board for optimal performance.
Procedure for aligning the FM Intermediate Frequency (IF) stages.
Procedure for calibrating the FM dial and aligning RF circuits.
Adjustments for FM signal meter, distortion, tune meter, and muting.
Procedure for multiplex (MPX) alignment.
Alignment for AM IF, dial calibration, RF, and signal meter.
Detailed circuit diagram of the QRX-5500A tuner section.
Detailed circuit diagram of the QRX-5500A audio section.
Detailed circuit diagram of the QRX-7500A tuner section.
Detailed circuit diagram of the QRX-7500A audio section.
Detailed circuit diagram of the QRX-7500A equalizer and CD-4 section.
General| Total Harmonic Distortion | 0.3% (Stereo) |
|---|---|
| Tuning Range | FM, MW |
| Weight | 21.2kg |
| Input Sensitivity (MM) | 2.5mV |
| Input Sensitivity (Line) | 150mV |
| Signal to Noise Ratio (Line) | 85dB |
| Output (Line) | 150mV |
| Output (DIN) | 30mV |
| Type | Receiver |
| Power Output (Stereo) | 50 W per channel |
| Frequency Response | 10Hz to 30kHz |
| Inputs | Phono, Aux, Tape |
| Dimensions | 54.1 x 16.1 x 37.1 cm |
| Signal-to-Noise Ratio | 85 dB (Line) |
| Speaker Load Impedance | 4-16 ohms |
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