Gpx4500 problem

[hooby life]

Did you manage to fix the board?

Yes i do
NOw The device does not work in the normal mode, while it works with the enhanced and spicial modes, and the reason is that I installed a commercial coil that I think is not compatible with the device. Normal mode crashes because it was running on it. any information about what happened ? Fix it ?

[detectormods]

Yes i do
NOw The device does not work in the normal mode, while it works with the enhanced and spicial modes, and the reason is that I installed a commercial coil that I think is not compatible with the device. Normal mode crashes because it was running on it. any information about what happened ? Fix it ?

Replace the 4053 under board near front middle.

[Wahyu]

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.

thank you for replying, will the inductor and resistor affect the current in the coil?

[detectormods]

thank you for replying, will the inductor and resistor affect the current in the coil?

it should have little to no effect, if the core gets warm in operation it indicates power loss but it runs cool.