I need your input or any professional help with my problem.

[Danny (OBX)]

I need your input or any professional help with my problem.
I have a Fisher CZ 70.

1. I can only raise my sensitivity no higher than 4 without getting false readings or bouncing tones at every swing.
2. I turn my volume/discrimination down to 1 with the sensitivity above 4 and it makes does not make a big difference, but it does help.
3. I do ground balance and it does not make any difference either.
4. This problem is happening if I am at the beach (salt mode) or in the woods relic (normal mode) hunting 100 miles away from the beach.
5. At every swing, the loud tone occurs and it is awful

 

[Tony (NC)]

Maybe you got some debris in the cover. I have quit using a coil cover at all. Hope you figure it out.

 

[Danny (OBX)]

No, I do not use a coil cover and my coils are not warn. The alternate coil I tried, was a new one.

 

[Tony (NC)]

I now relent to some of the forum scientists! Just kidding guys!

 

[BarnacleBill]

Just some general questions which may or may not help.

1. Does it act the same in All Metal mode.
2. I've never used a CZ-70, so will the machine turn on without a coil attached? If it will, does swinging the machine without the coil cause a sound?
3. With the machine set up making the noises, does swinging the coil while held out in front of you make the sound? And does swinging the coil overhead make the sound?
4. Have you removed the batteries and inspected the contacts/wires to see if they are corroded/frayed so that movement might cause a voltage drop to the machine?
5. Have you removed the batteries and let the machine set for a couple minutes to do a cold re-boot?
6. Have you changed all the batteries to new alkalines?
7. Is the display reacting also like the changes in sound?


HH
BarnacleBill

 

[Danny (OBX)]

I think I will just call Fisher Lab and see if I can send it in for some R&R. Maybe they can fix the issue without loosing any depth. I can get several inches in depth anytime I am going more than 4 on my sen. Thanks... And if there are any more ideas, I am open...

 

[Low-Boy/LCPM]

I can't go past four on my machine. I don't put vol past 5. Try lower sens and see what happens. Try a clean spot to ground bal, take your coil cover off try another coil. Wrap the coil nice and tight around the shaft. Jiggle it. Or send it back to Fisher!

 

[mtdoramike]

at higher sensitivity then 4.

 

[Ron from Michigan]

I had two CZ7A'S and both were very erratic with the sensitivity past 4.I think the targets were deeper at 4 than when the CZ was at six because all of the hyper static.Same ground area my CZ5 and CZ3D could run at max sensitivity without this problems.But the CZ7A's still had excellent depth.

 

[Danny (OBX)]

1. Does it act the same in All Metal mode.
Yes
2. I've never used a CZ-70, so will the machine turn on without a coil attached? If it will, does swinging the machine without the coil cause a sound?
Good ?, I will have to check this.

3. With the machine set up making the noises, does swinging the coil while held out in front of you make the sound? And does swinging the coil overhead make the sound?

4. Have you removed the batteries and inspected the contacts/wires to see if they are corroded/frayed so that movement might cause a voltage drop to the machine?
All ok

5. Have you removed the batteries and let the machine set for a couple minutes to do a cold re-boot?
Tried that too

6. Have you changed all the batteries to new alkalines?
Yes

7. Is the display reacting also like the changes in sound?
Yes, All functions are working great and with sound. Tones are not changed. When I up my sen. above 4, I increase my depth, but I have to turn down my discrim to be able to stand the bouncing sound.

Maybe it is the iron plate in my head......... Just kidding

 

[Jackpine Savage]

in your vehicle where it could have gotten hot? I had bought a used CZ that operated just like you are saying and the Tech felt that heat had caused some drift in the components or something to that effect.

Tom.

 

[Danny (OBX)]

That could have happened. That is the most logical thing that could happened. thanks..I'm about to call the tech