Whites TDI : Pots & switchs values/position

[Jose]

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

[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?

[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

[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.

[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]

Ok, thanks Carl.