Aion vector delay no delay?

[Kee22]

Ive seen it on internet unfortunately I don't have the components at the moment........Just my multimeter.

[Marcos - Munky]

Ok, so let's try to make it work for you anyway. To make your audio probe, you need:

- a amp. Any amp will work.
- a way to connect "loose wires" to this amp. If you have a spare jack and two pieces of wire, that'll work, so you can solder the wires to the jack and connect it to the amp using a regular cable. If you have a spare plug or a faulty cable which one plug works, that'll also do the job, as you can cut the cable or solder wires to that spare plug, and connect the plug to the amp.
- any cap with value between let's say 1nF and 220nF. Any value will do, any voltage rating will do, any kind of cap will do. If you don't have any spare caps, this is not a big deal, as long as you know exactly what you're doing with the audio probe (and we'll guide you to do it correctly).

Try to get a spare plug/jack/bad cable you can cut, and let us know. Don't worry on the cap, but if you have it then it's better.

[Kee22]

Hi
Ok so I made an audioprobe didnt use a cap. Its stange I have no signal in on PT2399 pin 16 is dead. I have a signal on r8 on the schematic but not on c7. Suggestions.

[Marcos - Munky]

Can't clearly see R8 on the photo you posted at the first topic. There's some shadow over R8.

First thing, check R8's value. It should be 10K. If it is, then check the solders around R8 and pin 16, maybe there are some very small solder bridges shorting something, or a cold solder joint. It's a nice idea to remove the old solder and put in some new solder.

If that doesn't help, then remove R8 and check it using a meter. A bad resistor can have it's resistance way higher than what it's supposed to be, and maybe it's high enough to attenuate all the signal that tries to get thru R8.

[Kee22]

Hi
Ive already replaced r8 didn't have a 10k so its a 9k but there's signal before and after r8.

[Marcos - Munky]

How is the signal on C& right now? What about the signal on R14?

[Kee22]

Hi
No signal after C7 and R9. Nothing after r14 either.

[Marcos - Munky]

Try to remove the PT2399 and then check the signl after C7 and R9 again.

[Kee22]

Hi
PT2399 removed signal on all of them and on the socket where pin 15 on the chip should be.

[Marcos - Munky]

Nice, then you got the problem to be around the PT2399.

Since you replaced both the PT2399 and the regulator, and got a 5V voltage reading after the regulator, then the next thing I'd try is to recheck all the solderings on the PT2399 socket. You may have a solder bridge somewhere, sometimes it's one so small you can't cleary see with naked eyes.

Also, check the voltages on pins 1, 3 and 4 of the PT2399 socket, without the IC inserted.

[Kee22]

This is starting to get really annoying, I've resoldered the entire socket and inspected it with magnifying glass cant find any problems. The volt without PT2399 chip in the socket is pin 1 4,95v pin 3 and 4 for shows zero.

[Marcos - Munky]

The voltages are correct. So, if you're getting sound on pin 15 of the PT2399 socket but get no sound with the PT2399 inserted on the socket, you got a bad IC or it died somehow. Put it back, check for sound on pin 15 and also check if the IC gets hot (just put your finger on it for a few seconds).

You found the part of the circuit the problem is. Now it's just a matter of narrow it down and solve it.

[Kee22]

Hi
It has to be something else Ive tried with 3 different PT2399 chips same thing and there no heat from the chip and no signal on pin 15? And thanks for all your replies  . Almost as it shorts when the chip is in the socket.

[duck_arse]

I think you;ve narrowed it down to the board and not the chips. can you post another photo of the board, this time with the PT out of its socket, please?

[Kee22]

[duck_arse]

orrlright. get yer meter, set to ohms. power off, socket empty, measure each and every 10k resistor on the board, please. also measure across those 2 100nF caps, they should read open circuit/non-sensical/high and counting - some reading other than a good steady number.

you seem to have lifted a track on the 9k1 resistor, you'll need to fix that for continuity. there is something looks like a fibre visble in the socket hole between pins 1 and 16. make sure it is not a wire strand, and remove it, anyway. thank you.

[ElectricDruid]

There's a resistor (22K?, second one above the blue trimmer) which doesn't look soldered too. Left hand end.