Whites TDI : Pots & switchs values/position

[Melano87]

Ok, thanks Carl.

[Carl-NC]

It will take a deep dive into the circuitry to figure this out. Do you have:

1. A good understanding of how PI operates
2. An oscilloscope

[Melano87]

Are you sure the GB is turned off?

Hi Carl,
I tried many things, and the Pulse Scan improved by putting an On-Off switch on the GB and a general GB potentiometer rather than the GEB On-Off Fine (resistance) + Coarse assembly.
On the other hand I still have a "power" problem, it does not take targets at more than 10cm, when I turn the Gain potentiometer I see the slight evolution but nothing more.
Thanks.

[Melano87]

Yes, the "GB OFF Fine" is OFF and the "COARSE GEB" in the mini. For the gain if I increase I see the increase in the distance with my gold alliance, no change on the euro coin. A succinct wiring diagram by hand of my GB.

https://zupimages.net/up/23/02/aylu.jpeg

[Carl-NC]

For a one euro coin, the TDI SL took it at 30cm, my TDI modified at 2 cm (not 20 but 2)...........

Are you sure the GB is turned off?

[Jose]

If I understood correctly, a 19 cm gold ring, a 2 cm euro coin. you may have a problem with the GB.

[Orbit]

My case is made of aluminum and separates into 4 parts, your realisation is much prettier.

I think I have a problem but I can't figure out where. With the original 12" Dual Field, I capture Gain at full, no GB, Pulse Delay at the mini, Audible Threshold, Conductivity on All, a 19 cm gold ring (4-5cm less than a real TDI SL I was lent). For a one euro coin, the TDI SL took it at 30cm, my TDI modified at 2 cm (not 20 but 2)...........

pay attention to the gain potentiometer !

[Melano87]

Looks like we bought the PCB TDI from the same store. I also had to make a box for the device.

My case is made of aluminum and separates into 4 parts, your realisation is much prettier.

I think I have a problem but I can't figure out where. With the original 12" Dual Field, I capture Gain at full, no GB, Pulse Delay at the mini, Audible Threshold, Conductivity on All, a 19 cm gold ring (4-5cm less than a real TDI SL I was lent). For a one euro coin, the TDI SL took it at 30cm, my TDI modified at 2 cm (not 20 but 2)...........

[Orbit]

Looks like we bought the PCB TDI from the same store. I also had to make a box for the device.

[Melano87]

It looks like your headphone jack is not wired properly. In my diagram above, "Pin 3" is the "tip" connection on the jack. "Pin 2" should connect to the pin on the opposite side of the jack so that when the headphone is unplugged it makes contact.

Good evening Carl, it's okay, it works. All I need now is to do tests. Thank you again.

[Carl-NC]

It looks like your headphone jack is not wired properly. In my diagram above, "Pin 3" is the "tip" connection on the jack. "Pin 2" should connect to the pin on the opposite side of the jack so that when the headphone is unplugged it makes contact.

[Melano87]

Like this:

Hi Carl,

I had to leave aside my assembly for personal reasons and I was finally able to resume it, everything seemed to work, I had made a bad assembly on the conductivity switch but I was able to change it.
However, I will have to do tests.

I still have one last problem with the sound.
There is no sound in the speaker, to have sound I have to plug in a headset and I end up with sound in the headphones and the speaker. Why ?

Thanks.

[Melano87]

Thanks again Carl.

[Carl-NC]

Like this:

[Melano87]

The connection of the 6.35 female jack to the P2 connector, each pin of the connector corresponds to each "section" of the jack, or is there a particular assembly?