Hello, I built the power supply from the attached schematic, but it does not work.
I found that the output voltage stays at about 3.5V at any position of the potentiometer POT3 or POT1.
I also found that the voltage across BE junction of the BC transistor stays always at 0.55-0.60V.
The input voltage is about 33Vdc, and I am using a 24Vac / 160VA transformer. I used TIP35C instead of BD249, and BD140 instead of BD136.
I checked the layout and it seems to be ok (no bridges). I used only POT1, POT2 and POT3.

The original schematic is named original_schematic and the schematic I build is named schematic_img.
Between the schematic that I built and the original schematic is the following difference: the schematic that I built is using an external transistor for current limiting, because I found some time ago that the internal limiting transistor is very weak and it does not resist when there is a short circuit on the output, probably because the current that suddenly flown through it is very high. Or probably I am using some fake LM723.

I tried the following: I changed the potentiometers with some new ones, I changed LM723 with a new one, but the situation is the same.
What should I check to find were is the problem ?
I think that there is a problem with the current limit, but I am not 100% sure.

Later Edit: The voltage on pin 12 is about 33V, on pin 11 is about 32.5V, on the output pin (pin 10) the voltage is always 4.1V.

 

Try building this one to test it, it looks like your circuit is drawn wrong...you can omit current limit by temporary linking pins 2,3.

 

Did you found were the problem is in my circuit ?
It is a problem with the original schematic or with my schematic ?

 

Did you found were the problem is in my circuit ?
It is a problem with the original schematic or with my schematic ?

Pins 4,5 and 2,3 are not wired correctly, 4,5 are for voltage control, 2,3 for current.. Check my previous post diagram..

 

1. Does the schematic that you attached at post #2 have variable current limit down to 0A ?
2. I found that the current limiting is temperature dependent, is there any schematic that does not have temperature dependent current limit ?