Jeohunter - Visual Ground Scanner

[Funfinder]

Hi geo-i, my brave friend , hope you're still relaxed and confident.

OK, the above flat-ribbon cable is attached correctly.

And if you haven't done anything with the left flat-ribbon cable
then there's no way for any problem with it.

If it's the same front touch-pad panel as you see below
then the connections have to be identical.


What we do now is to narrow the fault:

1. create lamp-battery circuit, unplug reset button cable
and test if lamp only shines while new reset button is
pressed (if lamp always shines: find and remove the
shortcut or damaged button and test it again)

2. unsolder the both wires near the flat ribbon
cable and test if Jeohunter is working OK now

3. plug reset button cable and test if lamp
only shines while new reset button is pressed
(if lamp always shines:
find and remove the shortcut and test it again)

4. carefully resolder the both reset button wires
(don't create any soldering shortcuts)

ONLY while you press the button the test-lamp should burn
or the Multimeter electricity should flow.

Please show me picture of "window screen goes like crazy".
Good luck.


PS.
Below you can see my newest microscopical work:
Casio LCD-TV net-adapter plug minus to plus reversed
(the area was 1x1cm) and attaching an antenna connector.

[Funfinder]

I eventually managed to download the file using "deposit files", after following a somewhat convoluted process, and having to enter the special code twice. After watching the video, I now feel a bit dizzy and a little nauseous.
It would have been better if you had compressed the file in rar format, then split it into 1MB chunks and posted them here.

Hi, any new great discoveries at the secret remote project forum... ?

If you are getting a vertico just by watching you better
should not try this tecnique in real - you could end up
bumping into some trees, roots or other stuff.

Yeah, that's the way of "circle-scanning"!
Either you like it or not.
It may feel great to be the "gravity center" of your own world...

btw. if you only look straight at the coil and make a counterturn
when you found something usual you won't get very dizzy.

However it is the only real efficient way if you want to
look for treasures at sites where not every centimeter lies
a target.
Even 1 person holdable eliptical DD 1m coils could be
realizable which would be much better because you
could cover around 4 meters of diamater in one turn!


attached: the Jeohunter video (as another backup)

[der_fisherman]

Hi, any new great discoveries at the secret remote project forum... ?

If you are getting a vertico just by watching you better
should not try this tecnique in real - you could end up
bumping into some trees, roots or other stuff.

Yeah, that's the way of "circle-scanning"!
Either you like it or not.
It may feel great to be the "gravity center" of your own world...

btw. if you only look straight at the coil and make a counterturn
when you found something usual you won't get very dizzy.

However it is the only real efficient way if you want to
look for treasures at sites where not every centimeter lies
a target.
Even 1 person holdable eliptical DD 1m coils could be
realizable which would be much better because you
could cover around 4 meters of diamater in one turn!


attached: the Jeohunter video (as another backup)

Firstly thanks for posting so that we can all see it.
I got a bit dizzy too! How is spinning around any better than normal MD scanning? I miss the reasons for doing that....at least the usual method clears/checks a "path" about a meter wide. But you only check the circumference of a circle, so I guess that you must move slowly at a rate of the width of the search head for each revolution made......if you are a classically trained ballet dancer, you might handle it, but I would fall over in the first 5 minutes.....
Sad that you did not show us what it was you actually found either, what was it?
regards
Andy

[geo-i]

window screen joehunters

hello my friend fun finder thank every thing but i have a big problem
i am worry about my joehunters the screen does not produce
proper way and the picture do not stable no sound got out
it like dizziness please help me bro SOS
this are the picture of '' window screen goes like crazy''

[Funfinder]

Hi geo-i,

this window screen is crazy!

Do you have really had connected the
coil-cable while shooting this first picture?


I really have no idea what's been happened,
but the Reset Button Mod cannot be the fault,
because even if you had created a shortcut this
only would have the same effect as if someone
presses all the time the touchpad reset button
while turning the off Jeohunter to on.


So there must be a different cause!

Perhaps while opening the box you have
created some loose-connection at one of
the plugs. Check out the 2 plugs with the
colored monitor wires in the back of the box.

Try to remember exactly what you have done
after opening the box.

- Have you switched off the power first
as I've told or removed the accu-pack?

- Was there a smell of any burned?

- Have you removed a cable and forgotten
to plug it back?

- Have you touched a part of the mainboard
by some piece of iron, wire etc.?

- Have you done the above described 4 step test?

- is the reset-button cable still there or removed?


I need answers to all of those questions
if we should have a chance to find out
what has happened. And if you may have
made a mistake you know about please tell it.

At the moment I can't make any predictions
if your Jeohunter is somehow broken or not.
It may be only some kind of plug problems.

It would be fine if you could make some
detailed pictures of the opened Jeohunter.
Let's hope the best for the moment.


PS: Yes, you have the identical touchpad -
it can be seen at your picture from here:
http://www.geotech1.com/forums/showp...&postcount=466

[Funfinder]

direct soldering!

geo-i, your DSC00660.JPG shows me that you have
removed the vertically printed circuit board. Why?

This board holds the on-off switch which is very
dangerous if the accu-pack was still attached!


This whole vertical circuit board removement
was not as described by me (see below),
because you can simply solder the both wires
easily without removing that PCB and
without creating possible troubles.

Because the both needed contacts are directly at the
opposite side of the upper flat-ribbon cable.

I hope nothing serious has happened at this action.

[Funfinder]

Jeohunter Connection Layout

Hi geo-i,

hope the especially drawn 4 U schematic helps.

You must control that every cable of the
vertically pcb leads to the correct plug.

Check out first if you have the same mainboard
as shown below (the lower right region contains
the transmitter/receiver & detection circuit and
is usually hidden below an alu-housing so only
compare the rest of the board if it is identical).

Be very careful about the 2 black/red wired cables -
don't confuse them - one contains the full 14.8v.

Always draw a little schematic of the
correct wiring before you remove cables!

Check out that the cables really lead to the
correct plugs like you can see in the layout
and that the plugs have a good connection.

Make shure the color of the wires finally
will have the same position as shown!

Good Luck!

[geo-i]

mistake

hello my friend because the picture is not very clear
bro i am making big mistake sorry my friend can you
give me the picture of the circut from the front
side thanks.



regards
geo-i

[Funfinder]

Hi geo-i,

why you started with this Reset-Button-Mod without
informing me and using the great chance of direct help?
Because this was the first mistake.

And what was (the second) your big mistake?
Are you shure that you made a big mistake?

Perhaps this is also a problem if you translate all this
information by a computer and this computer-program
tells you wrong things. How good is your english?

I'm asking this because of the question:
Of exactly what circuit do you want a picture?

After the new drawn Jeohunter Connection Layout
everything should be pretty clear.

Please geo-i, tell me exactly what has happened
and what is the actual status quo, this means what
is the situation now with the Jeohunter.


As example: How did you connect the cables?


If you have problems to describe it take some pictures.
Show me pictures so I can compare it and see the
difference.

I'm feeling with you in this sad hours of possible loss
but you have to look forward!

First we have to find out if there is really nothing to do
and next you may perhaps have to find a way for a
replacement of the maybe fried or burned parts.


But you have to help and if you ignore all my formerly
questions for information etc. we won't come any further.
Do you understand this?

[geo-i]

correction of circuit

hello my best friend in your question there is a many answers
yes i switched off the power fist and remove all the accu pack
and i remembered last week when i build the joehunters accu
pack with the ultrafire i discover di scomfort smell burned in the
box of joehunters i quickly pull out the accu pack switch and
removed all cabel . after that incident i did not use the device
for one day and decided to build new joehunters accu pack
but with different case it can remove easily i waited for 7 hours ,
after i saw your modification reset button i am i feel more interest
to make one but i was doing it wrongly due to the circuit is not clearly
shown . i only decided the ciruit got burning smell shown in 2 red circle. thanks


regards

geo-i

[geo-i]

direct soldering

hello my friend according to the picture diagram shown i am quite confuse
about the connection whether both of the 2 cabel orenge and black is been connected together see the picture.thanks




regards
geo-i

[Qiaozhi]

What amazes me is why someone would spend 2500 euros on a detector that, according to the advertising is "perfection in its nature", and then frig around with the innards when they don't really know what they're doing.
That's certainly one way that's going to make the guarantee null and void.

[Funfinder]

@ geo-i

Looks like your later accu-pack wiring
has destroyed parts of the power circuit.


Before you do anything further you have
to be 100% shure that your accu-pack
really has 14,8V and correct polarity!


Your picture is OK but very hard to see -
seems R24 was burned and U1 5403 EUB.

R24 is replaceable if you are very careful
with a small 51kOhm resistor but the U1
which seems to controls the LCD screen:

http://www.digchip.com/datasheets/pa...MAX5403EUB.php

will be a problem.

Perhaps there is a simple bypass possibility
so you will have a fixed screen brightness...

Are you really shure that U1 has been damaged?
Can you recognize some brown, burned stuff there?


> i am quite confuse about the connection

If so please ask before - the diagram is really clear.
the both "power-line"-pins are connected together by
an orange cable. However it is very simple to solder
the cable to the correct pins - which you have done well.

Good luck, geo-i, if we're lucky we'll find a workaround.

If it's the U1 we need the pin-outs of this IC and
have to find out how exactly it functions.



@ Qiaozhi
I guess there was no more guarantee and geo-i
thought "no risk, no fun". Perhaps the price for learning
now is high but perhaps we will have a chance to repair
this "perfection in it's nature" detector.

Shure, the missing special reset button at the older
models is a problem, but the new ones have it by default.

[Funfinder]

geo-i

listen very carefully:

I found out an unrisky and possible workaround.

BUT:

You have to work extremly carefully, you should
get some experience first in soldering extremly
small contacts and it's fully your own risk. But
because now the damage already is done you
have not much to risk anyway!

What you have to do is to solder 4 isolated wires
to the shown contacts. At the end of the left 2 wires
solder a 51kOhm resistor and the both ends of the
right 2 wires (those are near the U1 chip) will
became the "variable resistor" area.

The wires are important because for testing you have
to reattach the vertical board and after this you don't
have any access to the below area.

For the resistor test wires to the right on the picture:
In the beginning you will start with a very high
resistor (100kOhm) to find out the effect.
Perhaps nothing will happen, so you can try a
lower one (50k) and test again.


How can you solder such tiny contacts?

You have to use very thin isolated wires.

Now solder a small amount of soldering-tin
to the contacts of those wires.

Press the tinned tip of the wire exactly over
the soldering pin and heat it from above
carefully until the wire is soldered onto the pin!

Try and repeat this technique first at a test
board until you have enough expierence.


For the moment this is your only chance if you
don't wanna send the mainboard to Makro Group!


Describtion of this workaround:

Usual the digital potentiometer will create a
variable resistor output between the pins 2 (LB)
and 4 (WB). But because you have told me this
IC was burned there is no longer any current
flow or resistor activity!

At the moment Pin 2 and Pin4 are cutted off
and that's the big problem.

By the way your crazy screen indicates that
before this IC was still functioning but already very bad.

Anyway - if you bridge Pin2 and Pin4 with your own
resistor, you can re-activate the needed connection.

But this has to be done very carefully!
You have to make shure that the end of the wires
will create no shortcut! Isolate them if you don't
use them for tests!

You should use ca. 20cm long wires for the
workaround connection so those are long enough
after you have plugged everything as it was before.

And as I have told already:
First go shure your accu-pack works correct.


You have nothing to lose! At the moment the board
doesn't work and it makes no big difference if there's
one malfunction or another one additional if it comes
to replacement.

But what you can gain:
- saving ALOT of money and time
- having the great feeling that YOU could "repair" it
- getting experience in electronics

Best wishes and good success!

[geo-i]

some brown

hello my best friend fun finder this are
the picture that some brown burned stuff
that i see with the special lenz.


regards
geo-i