CD error Vanquish 540

[Melano87]

Hi,

I have a problem with my vanquish 540, it displays "CD" as soon as I turn it on with my two V8 and V10 coils.
I checked everything I could (mH coils, capacitors...) to the best of my knowledge, I can't find the solution. (The detector is "a 3rd hand", so no invoice or other).

I also feel like the startup sound has decreased.

I tried a reset, but nothing...

Does anyone have any ideas?

Thanks.

[ivconic]

"CD" = Coil Disconnect
The "CD" error on your Vanquish indicates a coil compatibility issue or a faulty connection between the coil and the control unit.

[ivconic]

I'm not sure... but I'm guessing.
If the coil cable is 100% checked and OK, the coil connector as well; the only thing left for me is to doubt the attempt to update without connecting the coil to the detector.
I will abuse this thread to add something else.
Some time ago I wanted to replace my 340 with a 540.
The next day I immediately went out into the woods to test the 540.
I was (to say the least) disappointed with the instability and the abundance of false signals!??
It is the same forest and the same place where the 340 delighted me with its calm and precise behavior.
I returned home and in a hurry, without reading the instructions, tried to update.
I noticed that the text on the monitor warns me that the coil must be connected.
I don't remember well now, I think I did the update without the coil.
And later after half an hour I did the update again, this time with coil.
In the room, the 540 worked great.
The next day I went to the same forest... alas, everything was as before, very poor performance, many false signals, unbearable instability!
And it is a new detector, from the store, never used.
At the same time, I carried the 340 with me. The 340 still performed phenomenally!
On the same day, in the early evening, I drove to another city, to a friend who owns a detector shop, returned the 540 to him.
And twenty days later, unintentionally, I had the opportunity to get another 340 in some exchange.
So now I have two 340! Ha, ha, ha!
Of course, I don't need two, sooner or later I will sell or exchange one.
But I noticed their prices are not going down but going up!??
So now I'm already in a profit of about 50e by the very fact that I saved 340, not rushing to sell it.
Long post... typical of me.
But here I raise a question about what I experienced.
Nothing is clear to me!?

[ivconic]

Ah yes, I forgot to mention that my friend, who already has an Equinox 800, also bought a new 440.
He was also in the woods with me that day.
It will sound incredible but his 440 behaved identically unstable with many false signals, same as the 540 I tested.
And he is now selling his 440.
This is a direct question for ML...

[Altra]

Try a factory reset by pressing the power button for more than 7 seconds. My Equinox has been stuck in the "CD" error and was fixed by a reset

[Skippy]

A 'coil disconnect' error is not necessarily caused by problems with the TX or RX circuitry. It can be a problem with the 'Data' signal ( serial memory authentification /security / ID chip ) , or possibly the 3.3 Volt power supply to the coil pre-amp etc circuit, which would clearly stop the memory chip functioning.
Try measuring the +3V3 output from the control box. I've no idea what the pinout of the Quish is. Finding 'Ground' should be easy, it's likely to be connected to USB-port ground, and maybe the headphone ground.
Broken connections to the control-box coil connector may be a possible failure, they get wiggled every time the coil is plugged/unplugged.

[Melano87]

I'm not sure... but I'm guessing.
If the coil cable is 100% checked and OK, the coil connector as well; the only thing left for me is to doubt the attempt to update without connecting the coil to the detector.
I will abuse this thread to add something else.
Some time ago I wanted to replace my 340 with a 540.
The next day I immediately went out into the woods to test the 540.
I was (to say the least) disappointed with the instability and the abundance of false signals!??
It is the same forest and the same place where the 340 delighted me with its calm and precise behavior.
I returned home and in a hurry, without reading the instructions, tried to update.
I noticed that the text on the monitor warns me that the coil must be connected.
I don't remember well now, I think I did the update without the coil.
And later after half an hour I did the update again, this time with coil.
In the room, the 540 worked great.
The next day I went to the same forest... alas, everything was as before, very poor performance, many false signals, unbearable instability!
And it is a new detector, from the store, never used.
At the same time, I carried the 340 with me. The 340 still performed phenomenally!
On the same day, in the early evening, I drove to another city, to a friend who owns a detector shop, returned the 540 to him.
And twenty days later, unintentionally, I had the opportunity to get another 340 in some exchange.
So now I have two 340! Ha, ha, ha!
Of course, I don't need two, sooner or later I will sell or exchange one.
But I noticed their prices are not going down but going up!??
So now I'm already in a profit of about 50e by the very fact that I saved 340, not rushing to sell it.
Long post... typical of me.
But here I raise a question about what I experienced.
Nothing is clear to me!?

Thanks ivonic.
I even unsoldered the connector to see if anything could have shorted it out.
But nothing...

[Melano87]

Try a factory reset by pressing the power button for more than 7 seconds. My Equinox has been stuck in the "CD" error and was fixed by a reset

Thanks Altra.

It's not possible to perform a reset when "Cd" is displayed.
Because the detector turns on, "calculates," and then displays "Cd."
If you hold the power button from the beginning for 7 seconds, nothing happens. If you turn it on, release it, then press and hold the button again during the calculation phase, nothing happens either. And if you do this when "Cd" is displayed, it turns off the detector.

However, I was able to connect the detector to the computer for the update; it was detected, and it confirmed that the detector had the latest update.

[Melano87]

A 'coil disconnect' error is not necessarily caused by problems with the TX or RX circuitry. It can be a problem with the 'Data' signal ( serial memory authentification /security / ID chip ) , or possibly the 3.3 Volt power supply to the coil pre-amp etc circuit, which would clearly stop the memory chip functioning.
Try measuring the +3V3 output from the control box. I've no idea what the pinout of the Quish is. Finding 'Ground' should be easy, it's likely to be connected to USB-port ground, and maybe the headphone ground.
Broken connections to the control-box coil connector may be a possible failure, they get wiggled every time the coil is plugged/unplugged.

Thanks Skippy.

As mentioned above, I tested and checked my two coils, no issues.
I unsoldered the board connector to check, and nothing happened either.
Regarding the measurements, I admit I'm not sure where to test; I tested to the best of my ability.

I had some doubts about the capacitor because it looks strange, see the photo.
But it looks fine.

[Pep_T]

Have you tried probing the pins of the coil while it is connected in order to determine if there is any signal?
If you do not have an oscilloscope you can have some sort of idea using a multimeter in AC voltage, or if it is a single frequency machine, with Hz measurement.

[Altra]

Unfortunately with a CD error the Tx circuit is disabled. So you can't do a decent circuit test. If lucky maybe you will find a bad solder joint or burned component.

See page 17

[Skippy]

Quote: "As mentioned above, I tested and checked my two coils, no issues."

I never said there was a coil problem ....

Anyway, the PCB has some clearly-labelled test-points on it, such as 'GND' and '3V2D' ( digital ) '3V2A' ( analogue), they may give something to probe.
There's also what appears to be a fuse, or poly-fuse, the green-coloured 'resistor' next to the 'RED' power pad. Maybe worth checking.

[boilcoil]

Maybe you have a blocked/pressed button and that might be the reason you can't do a factory restore.
Check all the buttons to see if they are working properly.

[ivconic]

Maybe the photo is not enough resolution, maybe this is nothing... but with the available photo it seems to me that something is wrong with this chip. Some pins have turned a darker color, as if burned or overheated.
Pins 12, 13, 14... 23,24 and 25. Also... C308 is missing the left solder side...

[nejdet]

There seem to be traces of oxidation all over the board!