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NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: sullivan2002
Date: February 17, 2019 02:10AM
Hi to all friends

I have to repair my Excalibur 1000 that in this momento opened. I suspect could be one pot (Threashold or volume) or the Quartz or coil.
There is someone who has the electric circuit of this fantastic equipollente?

Thanks in Advance



Edited 1 time(s). Last edit at 02/17/2019 02:11AM by sullivan2002.

Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: GeorgeinSC
Date: February 22, 2019 09:53PM
As far as I know no one has the schematic for the detector. Minelab is very careful to safeguard their information. Too many thieves trying to duplicate their machines and sell them cheap.



Minelab Sovereign GT With an assortment of coils
Garrett Pro Pointer
Leche digging tool
Minelab Excalibur II
T-Rex 9.5 wet sand scoop

Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: sullivan2002
Date: February 23, 2019 03:05AM
Thanks for answer me. I understand but I need it just to repair my device.
Every time we buy a new electronic device we must hava the way to repair after warranty period of time. This is common for most devices just like TV, Amplifier, ecc...

So I cannot now do myself this operations or I can do but with difficulties.

Hope someone has somewhere and could share with me also privately

sullivan2002@libero.it

Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: OldBeechnut
Date: February 23, 2019 07:31AM
Been into the excalibur for about ten years, lots of research into and yet to hear of, or see any Blue prints of.



2019.....Gold rings..117..Misc/gold 10.....Silver/Sterling 320

Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: GeorgeinSC
Date: February 23, 2019 11:25AM
Unfortunately schematics for metal detectors are not available to the general public. They are only available to the manufacturer and to the repair centers authorized by the manufacturer.



Minelab Sovereign GT With an assortment of coils
Garrett Pro Pointer
Leche digging tool
Minelab Excalibur II
T-Rex 9.5 wet sand scoop

Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: stoneshirt
Date: May 08, 2019 10:24AM
Hey,and Hi...
The Chinese have it.!
stoneshirt.

avatar
Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: Ron from Michigan
Date: May 09, 2019 07:42PM
Stoneshirt, sad but true.



Minelab Sovereign and Equinox 600

Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: RC
Date: May 21, 2019 05:29AM
Yep Chinese knock off excalibur 2. You can find them on Amazon fir around 3000.00 dollars. The call it a Garden Detector. Wish someone would shut these fakers down. My friend bought one of these. Looks exactly like the real deal . He used it two months and then it died. It did not perform the way the real excal does. But the fakes are so good it is hard to tell. Minelab needs to have a database of serial numbers for the excal that can be searched. They have it for their more expensive machines but not the excal

Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: chuck, ky
Date: May 21, 2019 07:52PM
Why would any one even think about paying 3 thousand dollars for an Excalibur?

Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: bklein
Date: May 27, 2019 09:20AM
You don’t need a schematic normally to fix these. Bad pots are found with a scope or meter. Bad traces are found visually or with a continuity test. Press around the board to look for intermittents.

Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: sullivan2002
Date: June 04, 2019 06:58AM
it's not so easy, cause boards are 3 and need to be separated each other.

Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: bklein
Date: June 09, 2019 09:50AM
I’d not recommend taking them apart unless you find the issue requires it.
You don’t need to do it to verify the pots or xtal.

Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: sullivan2002
Date: June 24, 2019 09:48AM
the problem is that I can't find the problem, it takes me every so often to check the motherboard but it all seems fine. The impedance between TXA and TXB and RXA and RXB seems ok, there are no traces or marks of water in the tracks, the tracks all look okay, I can hear the threshold sound very well and I can adjust the intensity with the relative pot (knob) but when I set over the coil a piece of aluminum, it does not detect it,
Honestly, I'm in a closed alley and I don't know how to proceed. Maybe there was dampness or damaged slopes, but this is not the case.



I don't think is a coil problem,
I don't think is a water or humidity, metal detector inside I found it very dry
I don't think now is xtal cause if was xtal maybe I say maybe I could not hear the threshold sound
battery is out of the question cause I use only power supply with 13/14volt
I don't think are traces, nobody could damage them, they are in good shape and all are inside the Excalibur casing
I don't think are pots, I changed one, I replaced one with another taken from the sensivity, I don't remember but I also I tried to shorten the external terminals as if it were at its maximum value

I need good advice from someone who is really expert, a push to get to the solution

PS: I have a tester and a little oscilloscope, I need to know where to put the tips and what to test and what to check again.

I discovered that touching the boad near the volume pot, It changes the volume of the threshold but is like when I touch an input of an home amplifier but I don't hear the tipical sound of detection.


THANKS



Edited 3 time(s). Last edit at 06/24/2019 09:54AM by sullivan2002.


Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: chuck, ky
Date: June 24, 2019 10:29AM
What do you have the disc set to? Can it detect gold and nickels? Minelab repair could fix the problem quickly and easily.

Re: NEED Schematic Diagram of MINELAB EXCALIBUR 1000 circuit
Posted by: sullivan2002
Date: June 27, 2019 08:25AM
Now it's out of use, no gold and no nickel

I know the Minelab could do quickly, I have also a Minelab Equinox so I use this for gold and nickel.

I don't want to pay a lot to repair it.

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