Fisher Mark 5 Metal Detector wiring

[Sunitram]

Hello all,
I am new to this forum and have a question about an old Fisher Mark 5 Underwater Metal detector, which I recently aquired very cheap. Unfortunately someone did a really bad repair job on the inner cables and soldered the cables in the wrong order or left some of them hanging around. My question would be is there anybody out there who has one of those and can take pictures for me from inside the unit to get the right wiring done or even has some schematics of this one to fix it and get this old detector back to work... any hints in the right direction are highly appreciated - thanks a lot in advance. Regards



https://ibb.co/bMU0GK

ibb.co/kREBOz

[Carl-NC]

I think the Mark 5 was made by "JW Fishers". They are still in business and might be able to help.

[Sunitram]

Hey Carl, thanks for your reply. I already contacted them and they weren't able to help. They redirected me to a site called brokendetectors.com and Keith suggested to ask over here in the forum... so I keep my fingers crossed...

[Altra]

I have one and can post some photos later today. Carl is correct it is a JW Fishers.

[Sunitram]

Hey Altra, this would be so awesome - thanks in advance. Cheers

[Altra]

Here are some pictures of the Mark 5. If you need more info just ask.

[Sunitram]

Thanks so much!!! Awesome may I ask that if I see this correct in the first pic the middle pin on the right is not connected? So I assume the black cable is not supposed to be connected anywhere... Right?

[Altra]

I think the black wire was connected, you can see it hanging in another photo. The connections have become brittle over time. Do you know what kind of battery or voltage it used?
Judging by the contacts, it was one of those box batteries.


Add: I searched around and found it is a TR/VLF 5khz frequency the battery was a 9V carbon-zinc (Eveready 266)

[Sunitram]

Hey, it’s not quite correct there is a battery pack with six AA batteries 1.5V that needs to be connected to the connector.

[Sunitram]

So, I was able to fix the detector! The loose black cable needs to be connected to the free pin on the left. Yay!!! Thank you so much @Altra for the detailed pictures and for helping me bring this old lady back to life! If you need detailed pics of the unit let me know...