LDM

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 ?