[kohnni]

Hey everyone,
I just buildt the mp573 but do not get it working yet. there is no voltage in between TP2 & TP4. in the following are the measurements at the reference points:

A: 2,5
B: 4,0
C: 22,5
D: 13,4
E: 1,9
F: 12,7
G: 0,0
H: 4,9
I: 0,6
J: 4,25
K: 4,25
L: 0,0

I couldn't find any bridged solder points, but I have to say, that there are two things that seem to be suspicious.

1.: in the diy-kit, the Resitors R31,R39,..., R68 (eight in total, labled as '47k' in the component list) were in my case 10k Resistors. I ordered new 47k resistors an attached them. there were also another five 10k resistors (R16,...,R56) in the kit, which i soldered in the correct place. Was it wrong to replace the Resistors with the correct value labled in the parts list?

2.: on the DI Board, there are three holes for the capacitors C34 (470n-100V). In the parts list it says, that it should be labled 'u47'. I wasn't sure, if I had the right part at first, and soldered it at the end. The capacitor I soldered is labled '4n7j100' and it only fits into the first two holes on the pcb. here you find a photo for better explanation: https://drive.google.com/file/d/1LbVpfQoVmGiiJJseUyKfa57sRqvknj2D/view?usp=sharing

thanks a lot for your help!
johannes

[JPK]

1.: in the diy-kit, the Resitors R31,R39,..., R68 (eight in total, labled as '47k' in the component list) were in my case 10k Resistors.

This was an error on our part on some kits. You did well replacing them by the correct 47k (you should have told us so that we could replace them...).

The capacitor I soldered is labled '4n7j100'

This a 4.7 nF and it should go on C26.
C34 must be labeled 0,47.

L: 0,0

Check the connections to the output transformer on CN2.
Check the solder joints and also look for any short circuit between wires.
Also check the DC resistances of the output transformer.

[kohnni]

thanks a lot for your quick help. you were right, i swapped c26 & c34. but still i don't get any voltage between TP2 & TP4. here are the resitances of the output transformer: 

yellow-orange: 23,8
red-brown: 19,4
blue-green: 20.9
violet-black: 21

[JPK]

yellow-orange: 23,8
red-brown: 19,4

These values are not correct. Did you measure with the transformer unplugged?