Aion Refractor Low Voltage

[dobo2001]

So I built a Klon awhile ago, and it's just starting to act up.

Here's the documentation: https://aionelectronics.com/wp-content/uploads/2013/11/aion-refractor-centaur-documentation-v2.pdf

The problem is coming from IC2 (TL072), that's where the signal stops, and the voltages look really wrong:

1: -8.15
2: 3.56
3: 4.25
4: -9.28
5: 4.25
6: -8.13
7: -8.2
8: -8.17

There's no +18V coming in, and I think that's the problem. I'm not sure if it's somewhere near the IC, or somewhere near the charge pump.

Here are the charge pump voltages (TC1044SCPA):

1: 9.3
2: 5.53
3: 0
4: -3.75
5: -9.28
6: 4.5
7: 5.97
8: 9.7

The correct amount of voltage is getting to the PCB from the DC Jack, IC1 (TL072) is working fine. Any help is appreciated, thanks!

[ahiddentableau]

Sounds to me like you don't really need help, maybe just a bit of a dose of confidence.  Your thinking is totally sound.  So just keep going with it.  It's like you went 90% of the way to solving your problem, then for some reason just stopped when you're so close to the end.  Yes, the Klon has a relatively complicated power supply.  IC2 needs to have +18V on pin 8 and -9V on pin 4.  You started by measuring your IC2 voltages--good call.  So pin 4 is right.  So what's going on with pin 8?  It should be somewhere around 17V.  So you've got a problem with your power supply.  Just use the schematic to follow that rail back to the charge pump.  Make sure you have +18V at that junction between D4 and C22.  That should tell you what you need to know.

Good luck with the repair!