IDX-PRO+VDI

[Amermurad]

Maybe you hook the sensitivity switch to negative 4. If you know what I mean by negative 4

[Amermurad]

You should find 0, 4, and 8 volts

[Amermurad]

Hello
The device only works in mode pin-point
In your opinion, what is the problem?
thanks to all

You have a short between ground and neg
ative

[dgm]

Remember that the voltage you read must be divided by 10, due to the gain of the ic.

[dgm]

Hi Lian, in my opinion, first you have to check the pcb and all connected components are correct, then the wires that go to the potentiometers are too long, finally, you have to make the coil properly, both the tx and rx are tight with a string and the tx is temporarily blocked on a tablet, and the rx is placed on it and the precise point is found to perform a nulling. You have to measure a voltage as low as possible almost close to zero, but even 2 millivolts is the same, this voltage must be measured with an oscilloscope vpp in ac between the ground of the pcb and the sixth pin of the 5534 ic.

[lian]

Hello
The device only works in mode pin-point
In your opinion, what is the problem?
thanks to all

[lian]

Thank you freind

poor contact of R38 and I change Q3....The sound works but I can't change the frequency of TX I change the capacitor and the number of turns of the coil

[CDI]

hi freinds
please i need for help
what is the problem here

Try to put finger on audio transistor, if is hot, its look like u have short somewhere...

[lian]

hi freinds
please i need for help
what is the problem here

[lian]

hi freinds
please i need for help
what is the problem here
https://www.youtube.com/watch?v=MmMzdhT6w3U