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This video shows the reverse engineering of a Russian electronic board. The reference of the board is "TDCK". It is the power supply board of a satellite communication receiver used in several Russian missiles. We can can this receiver in a Tornado-C missile for instance (Торнадо-С). Video: • Cистема навигации РСЗО "Торнадо-С" 00:00 - Intro 00:04 - Overview 05:08 - Reverse engineering part 1: overall description 06:07 - part 2: 12V DC-DC converter 09:05 - part 3: voltage monitor circuits 13:14 - part 4: 3.3V and 5.0V DC-DC converters 13:57 - part 5: DC-DC converters shutdown circuits 16:00 - part 6: standby power supply Errata: Due to an error during reverse engineering the networks Diode-Resistor-Capacitor are actually snubbers connected in parallel to each transformer primary. Nothing is connected to the gate of the MOSFETs. Notes: Most parts are US or European parts. It is obvious that Russia don't have the modern technology to design such board with their own parts. Russian parts: The toroidal transformer The 10A fuse Maybe the electrochemical capacitor Main parts used on this power supply: UCC28084 (Texas) PWM controller for the 12V power supply TPS54356 and TPS54357 (Texas) PWM controllers for 3.3V and 5V Power Supplies MAX974 (Analog Devices) Quad comparators with internal voltage reference IRF7328 (Infineon) dual P-channel MOSFET MJD112 (ON Semi) NPN Darlington FDS4488 (On Semi) N-channel MOSFET IRFR5305 (Infineon) P-channel MOSFET SI4156 (Vishay) N-channel MOSFET Weird things: The grid of one unused MOSFET is left open What is the purpose of the fuse ? What will happen to the missile if the fuse blows ?