Zero Point Micro II no delay sounds

[Aryk]

I get signal just no effect. Pot don't seem to change anything either. Here's my readings:
TL072:
1. 4.54
2. 4.54
3. 4.54
4. 0
5. 4.54
6. 4.54
7. 4.54
8. 9.0

PT2399:
1. 4.49
2. 2.22
3. 0
4. 1.05
5. 4.31
6. 0
7. .05
8. 4.14
9. 4.24
10. .66
11. 2.22
12. 2.22
13. Same
14 same
15 same
16 same

Regulator:
VI: 9.09
G: 0
VO: 4.48

Also my regulator is pretty hot like could burn yourself if you held your finger there too long.

Any thoughts?
Thanks,
Aryk

[copachino]

IMO pin 4 must be 0v as pin 3, its grounded internally via 10 ohm resistor check value near pin 4

[Aryk]

Yep pin 4 is at 1.05 not sure what might cause this

[copachino]

Yep pin 4 is at 1.05 not sure what might cause this

Hace ypu tried another pt2399???

[Aryk]

I have yes. What other parts are connected to pin 4 that would allow voltage to get to it?

[copachino]

you could check r18 and delay pot

[madbean]

Pins 4 - 10 are all off. Here's what you should be getting:

1. ~5v
2. 2.5
3. 0
4. ~0
5. >=2.5
6. 2.5
7. <1
8. <1
9.-16. 2.5

The fact that your regulator is hot means something is wrong. Are you using an LM78L05?

[copachino]

sounds like a bad reg or bad IC to me, pins 5 to 8 have voltage surge direct to the reg, if not supplied ok, could be reg or a jumpered pad somewhere

[Aryk]

I'm using an LM78L05ACZ and have swapped out the regulator and IC with no change

[copachino]

I'm using an LM78L05ACZ and have swapped out the regulator and IC with no change

can you post photos of the board??

[Aryk]

Here you go


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[copachino]

first i see you are wiring cables of pots upside down... why??

[Aryk]

It's to fit it into the enclosure they aren't upside down


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[Aryk]

Or at least are wired correctly.


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[copachino]

i saw it now its right wiring on the pots, have you tried to move de delay pot??. also the best its to make a probe and on the IC(pt2399) input give a shot. also once happened that the input was grounded and the output too, if that its so, the you get only bypass output