Hello Iam new there. I have problem with this PSU. I designed it in the Multisim simulation, but doesn't work. Used modified partlist, 24VAC TR, BZX83C5V6, I have troubles with - 5.6V D7. I using TLE2141CP OP amps in simulation and if I connect U2 to the -5.6V, then voltage drop to 800mV. If I connect U2 pin 4 to GND, then PSU work, but LED slow flashing :-D. It seems that RV1 don't work. It is possible to test this PSU in simulation or PSU in simulation don't work? I mean that it must work. I have 100% correct wiring and parts. Please help.