Aligning the intermediate frequency chain ensures maximum selectivity and signal-to-noise ratio. Technicians inject a precise 450 kHz or 55.845 MHz signal into the IF chain and adjust the IF transformer cores (IFT coils) for maximum voltage output on an oscilloscope or VTVM (Vacuum Tube Voltmeter). FM Alignment
Gently pull the main tuning knob, squelch, volume, RF gain, bass, treble, and BFO knobs straight off their shafts. Use a plastic pry tool if they are stubborn. grundig satellit 750 service manual
The Grundig Satellit 750 heavily relies on Complementary Metal-Oxide-Semiconductor (CMOS) integrated circuits and Field-Effect Transistors (FETs) in the RF front-end. These components are highly susceptible to static electricity. Work on an grounded ESD-safe mat. Use a plastic pry tool if they are stubborn
This board handles everything from signal reception to demodulation. If you have an issue where FM works but shortwave is completely silent, the schematic will guide you to check the switching diodes or the 1st mixer FETs (often 2SK192 or similar components) responsible for the AM bands. The Display & MCU Board Work on an grounded ESD-safe mat
At least 60 MHz bandwidth to trace intermediate frequencies.
