[Power Supply 0-30V]

audioguru , thank you very much! All earned. Was a simple mistake, capacitors C2 and C3 were short-circuited, the holes in the board was unnecessary, did not find and solder properly. Oh, how glad I am !!!!!!!! ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D

[Power Supply 0-30V]

The output voltage from U1 should be 11.2V which is the 5.6V reference from zener diode D8 multiplied by two by U1 since R5 and R6 make U1 have a gain of 2.

U2 heats too much when its output current is too high due to a wiring problem with the pins of Q2, Q4 or Q5.

Found an error at the output of U1 is now about 11V.
The scheme collected on TL081, transistors Q4, Q2 checked, replaced, still U2 heats, the power supply is not working at the output of 0,45 V. At shaper negative voltage must be much volts? I have a 0,7 V, is that right?
Sorry for my English

[Power Supply 0-30V]

Hi,
Collected the Power Supply. I turned on does not work. Strongly heats U2. In what could be the problem? The output of U1 (6) with respect to point 4 (-) voltage of 27V. Is this correct? ???