PI circuit modifications and identification

[Brian Deese]

I have a PI unit that has poor performance,on the board it has 6 trimpots. I have not been able to get a schematic yet. How do you go about identifying the pots and what they adjust to tune this machine for better performance? Right now the machine is only useful to find plow points and sickle bar mower blades,not sensitive to coins at all. I can post Pics of the circuit if anyone wants to take a crack at it.

[Carl-NC]

A pic of the PCB might help identify it, then a schematic could follow.

[Brian Deese]

Here are some pics

I can get in closer just tell me where.

[Qiaozhi]

I have a PI unit that has poor performance,on the board it has 6 trimpots. I have not been able to get a schematic yet. How do you go about identifying the pots and what they adjust to tune this machine for better performance? Right now the machine is only useful to find plow points and sickle bar mower blades,not sensitive to coins at all. I can post Pics of the circuit if anyone wants to take a crack at it.

It would help to know the make and model number of the unit.

[ApBerg]

http://www.geotech1.com/forums/showthread.php?t=17571

Zoekt en gij zult vinden.... sears and you will find...

Best regards

Ap

[ivconic]

http://www.ebay.com/itm/Metal-Mine-D...-/180720738441



http://articles.janes.com/articles/J...d-Kingdom.html



...

[Brian Deese]

Very Funny

http://www.geotech1.com/forums/showthread.php?t=17571

Zoekt en gij zult vinden.... sears and you will find...

Best regards

Ap

You will not find the answer to my question there though,will you?

[ApBerg]

Hello Brain,

No , sorry I do not know that PI detector. And yes ...that replay was not very nice for you... that was not the intention .

Best regards.

Ap

[Carl-NC]

Oops, sorry, this is still in my court.

[Brian Deese]

Oops, sorry, this is still in my court.

I know you are busy,I was trying to get some feedback from the community.

[Brian Deese]

Hello Brain,

No , sorry I do not know that PI detector. And yes ...that replay was not very nice for you... that was not the intention .

Best regards.

Ap

No problem,thanks for having a look at it.

[amtech2005]

Hello Everyone . It sure looks like a Whites AF-108 made for Europe ?

I never saw a schematic but there are several photos of this PI machine buried in this forum somewhere .


Regards.............Eugene

[Carl-NC]

Finally found the schematic, I need to scan it tho.

[Carl-NC]

Uploaded the schematic in the "Schematics" forum. Enjoy!

[Brian Deese]

Now its in my court

Now I have to find which pot adjust the sample delay time I think.Im going to be looking at that schematic for a while.I think I will have big one printed at kinkos.Thanks a million Carl.