Madires, at the owner of 2 identical LCR-TC1 one of device strong leakage of the accumulator was observed, charging lasted not for long, the analysis and check have revealed breakdown of one of C2-C4 capacitors - there was resistance on the "ground" slightly more than 1 kOmh! From + 5v the serviceable tester consumes current from 24,6mA to 44mA.
I would like to return to a problem of C11-C12 and to explain what it is desirable to apply high-quality capacitors with penetrative voltage not less than 100v to. Below I will attach the photo of impulses which are developed by a chip of U5 with a frequency about 1 MHz for food of primary winding of the pulse transformer.
Impulses voltage in this chain reach values from -17,6v to 65,6v, and their amplitude depends on accumulator voltage, the charge is higher, the amplitude is higher.