According to the client, the radio tape recorder began to turn off periodically, and in the end it didn’t turn on at all ... I took it to the Orsha service where they could not fix the problem. After that, they asked to see me already, and as I understood it, this was already the last hope for recovery.
Having disassembled the radio, the crumpled frame immediately caught my eye. All the contacts in the radio were soldered, and the contacts on the panel even managed to be cleaned with sandpaper (for this, it’s generally worth pulling your hands under the base and throwing them over the fence), admire this in the photo for yourself. I was even more frightened when I saw that someone twisted the ferrites on the local oscillator frequency tuning circuits in the tuner (this was evident from the bends of some mustaches) and if they were not returned to their original position, then there was a possibility that the radio would have poor radio reception, and that's really bad...

The MOST (Media Oriented System Transport) optical system is installed on this radio, and to start it on the table, you need to loop the receiver with the emitter. Having connected the radio tape recorder to the LBP, they began to measure the voltages ... And then I understood why it was decided to solder it all in another service ... As soon as the board with the tuner was slightly tilted, the necessary voltages appeared at the control points, which, as it were, hinted at the launch of the radio ... From that moment my torment began, it took 2.5 days of painstaking drawing of pieces of the circuit (since there are no circuits for these devices anywhere) and stress removal in search of a microcrack.

The search for a microcrack led me to the microcontroller located on the tuner board, it then controls the supply of voltage to the right places, the power to the MCU came stably and did not disappear when the board was bent, generation on quartz was also present.
But one of the microcracks was with microcracks, which, in fact, were hard to see even in a microscope, and it was because of this that the controller could not execute the program and simply did not know what to do ...
So, having lost the microcircuit, the controller moved its legs as expected and did not react to the bends in any way ...

p.s. to date, this is the longest repair over which I had to work hard, how I do not like these microcracks! too many nerve cells are spent on their search =)