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The first thing to do is to check the circuit voltages. There are several voltages in this circuit that are generated with the help of buck and boost regulators. If these regulators fail, the system will not be able to start up. In the next step, you must reset or reprogram the program in the flash memory. If you do not have the necessary experience in this task yet, I recommend that you first view the following links and then proceed to program the IC: ------------------------------------ Sponsorship link connected to the Shaparak portal: https://zarinp.al/golmrezadarvishy Sponsorship link for loved ones abroad: https://paypal.me/MLavaei?country.x=I... --------------------------------- Digital receiver voltage measurement: • How to measure voltage: Digital receiver Programming the IC with ch341: • How to program the IC? Recipient... Thank you for your support ❤️❤️❤️ Our website for providing courses https://www.elecma.ir 1) Analysis of switching power supplies based on circuit and schematic 2) Analysis of the surge protector circuit board on the map and explanation of the circuit's working principles 3) Analysis of the computer power circuit. Complete analysis of 4 different maps with existing types of ACs 4) Construction of a variable power supply with high and low current (with transistor matching) 5) Installation of a flash player in a car radio in principle along with construction of a signal circuit without changing the radio circuit 6) Examination and analysis of a car battery charger circuit 7) Scientific and practical examination of a welding inverter or welding machine 8) Car amplifier training course 9) 220-volt power inverter training course 10) Modification of a book-type power supply to a short-circuit circuit 11) Zero to one hundred basic concepts of electronics (scientific and practical course) Our website for providing courses https://www.elecma.ir 00:00 Examination of the receiver circuit of the receiver 02:43 Voltage measurement of the digital receiver circuit 05:42 Testing communication paths for voltage 10:10 Examination of buck and boost regulators