Gpx4500 problem

[eclipse]

I've used paint stripper, made locally but for large board patches. Since you have very small section of the board that needs to be cleaned you can use other methods to remove the paint /mechanical stripping/

[Wahyu]

Hi Woody, what is the purpose of the inductor?

[eclipse]

This is input EMI filter. The SD2000 circuit here on the forum also has similar filter.

[David_1]

because the lack of circuit, the pesky white paint and the overal complexity.

anyone found a solvent for the white paint ?

[kt315]

do a trip in nearest shop Building Materials. ask staff 'remover for paints', but ATTENTION! it must be LIKE A GEL -!
NOT LIQUID -! not acetone, not white spirit, not solvent etc. THE GEL in metalic tin. it is toxic, you must do the job be out your home.
put a layer on the place. wait 1 hour, then delete/wash away.

[detectormods]

Do not get any gel under ic’s a it causes conductive paths that will be impossible to remove. Beware methylene chloride.

[kt315]

Do not get any gel under ic’s a it causes conductive paths that will be impossible to remove. Beware methylene chloride.

https://www.ebay.com/itm/15428766610...Bk9SR56Ftc6tYQ

[kt315]

Do not get any gel under ic’s a it causes conductive paths that will be impossible to remove. Beware methylene chloride.

[kt315]

Do not get any gel under ic’s a it causes conductive paths that will be impossible to remove. Beware methylene chloride.

[ton69]

Hi Woody, what is the purpose of the inductor?

Frequency correction in the current spectrum

[kt315]

again guys I URGENTLY AND URGENTLY ask you do the images more legible for The Archive.

please do these step by step!

1. wait clear sunday time. the sun must be VERY OPEN!
2. GO OUT from your home, at your homeyard, under the sunlight.
3. place PCB so the sun light will be from left upper PCB corner.
4. the shadows must be short, but they must be!
5. do a photoshooting.
6. you have NOT EVEN A TINY CHANCE here to get the answer if you are doing your Home Work poorly and woorse.
7. set your camera on high resolution. your pics has to be from 5MB and more.
8. send your pics to [email protected] with subject in subject field:
new HiRes pics of board [detector model name] for your collection.
9. Forget your egoistic intentions only take on and give nothing in return.
do not cultivate your EGO.


GOOD LUCK IN THIS YOUR NEW HOBBY.

[eclipse]

This Gpx board is chinese clone, Kt315. Just saying.

[detectormods]

That inductor is a filter for the transmitter output, it has a 6.8 ohm resistor in parellel to stop the inductor ringing, it will very slightly slow the leading edge of the transmit pulse and turn off to mitigate some spurious emissions, but some may not be aware that it has a slight effect on receive when using a mono coil, as in it behaves as an increased impedance to the signal thus stopping signal loss into the rest of the transmit circuitry. Especially when using faster modes as enhance or fine gold. It is easily proven by shorting it out and testing signal recovery amplitude.

[hooby life]

That inductor is a filter for the transmitter output, it has a 6.8 ohm resistor in parellel to stop the inductor ringing, it will very slightly slow the leading edge of the transmit pulse and turn off to mitigate some spurious emissions, but some may not be aware that it has a slight effect on receive when using a mono coil, as in it behaves as an increased impedance to the signal thus stopping signal loss into the rest of the transmit circuitry. Especially when using faster modes as enhance or fine gold. It is easily proven by shorting it out and testing signal recovery amplitude.

[eclipse]

Did you manage to fix the board?