CZ-3D Problem, anyone ever seen this before?

First off I had brand new batteries in it. Using the detector this evening it stopped giving me an audio response even when waving a quarter in front of it. I wondered if my headphones were bad so I unplugged them and still no response from the speaker with volume maxed out. After turning it on and off twice it started working again. About 8 minutes later it did the same thing, so I unplugged my headphones, reset the machine (on/off) a couple of times and it started working again. I then kept my headphones unplugged and used the speaker and about 3 minutes later the same thing happened. Do you think i have a flaky switch or could something else inside be going on? Thanks in advance for your help.

Hi,, It's highly possible that you have a bad potentiometer....The next time it does it try wiggling the volume control while you are passing a coin by the coil....If it comes in then you have a bad potentiometer on & off switch....JJ

When your unit fails..........Go straight to 'batt test'......as this bypasses all electronics.......and tests the power supply (the batteries). (((( Your battery compartment 'springs' may be weakining )))). If you hear no audio.....and see no needle deflection.........you have no DC.

Thanks for the help, its too late to do anything tonight but I will let you guys know what I find. I really appreciate your information !

Personally would clean the battery contacts buy a brand new set of batteries and test the integrity of the batterry compartment. No one mentioned a bad coil and would indeed try another coil on it as certainly couldn't hurt and one bad solder joint on the connector which sometimes makes contact and then doesn't could certainly cause this on and off again detection of a coin...

Well having my little girl be the coin holder I tested every switch, knob setting, auto-tune and battery checker and now can't get it to mess up. In all metal I also gently moved the cable around and it performed fine. Now ...before i got started I took off the coil connetor aand reconnected it....but this time turned it a little tighter. I wonder if that was the problem, but I won't know unless it messes up again....but i just thought of something, ill connect it like i had and see if that causes it...I'll be right back!

It ended up being that the coil connector was not tightened enough. Thanks for the help guys!

Do I get an attaboy as even a bad solder joint to the coil connector can cause major problems and in this case could have indeed been a bad coil..No tightening with pliers guys...just hand tighten and a common ink eraser that can be sharpened does a good job cleaning the contacts...if they still make them with all the modern typing technology available...

Dan-Pa. Wrote:
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> and a common ink eraser that can be sharpened does
> a good job cleaning the contacts...if they still
> make them with all the modern typing technology
> available...

Amazon has a “Faber-Castell Eraser Stick With Brush” for $2.15 each. In the good old days, you got a lot of them for that price.

Jim

Well, I have the worse luck. Problem is back after i thought it was gone forever (sigh). Any other ideas? I feel sick to my stomach over this.

If possible.............try my recommendation above.