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#1
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The thing I see is franco lrl electromagnetic mineorro, it's electrostatic. Actually, all the work changes according to the use of the first transistor. The IR used in the mineoro works as an electromagnetic field determinant. I hope I'm not wrong.
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#2
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Franco's receiver doesn't look like an electrostatic receiver. It is more an electric field meter. It creates an oscillation at the input and device traces any possible offset of the waveform. The number of transistors determines if it will catch a negative or a positive offset. In Franco's case it detects the positive side. And so the increase in signal when the antenna looks at the negative source target... ![]() IR leds is a none working mambo jumbo tech which works very good as a bate! ![]() |
#3
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I confirmed that my friend's FG90 has a problem, even if I make it move towards the sky, and even by decreasing the sensitivity to 10, the slightest movement gives beeps
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#4
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The device may have mechanical problems. Pay attention to the resistance of the case to mechanical movements when holding the device by the handle of the holder. Or turn on the device, place it on a flat surface, hold the body with one hand and, without fanaticism, press left and right on the handle by which you hold the device. This is one of the most common reasons.
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#5
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#6
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I did the handle test and there is no beep , only with full movement of the device , thank you for your help
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#7
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Hi Abdou.
Its difficult to repair the lrl from distance, this must be maken by you. FG90 has 3 detectors. You must isolate every time the two detectors and let only one to work so to understand where is the problem. First detector is the receiver on the board FG38679B. 2nd is the ion chamber and 3th is the magnetic receiver at right side of chamber. For begining desolder the red wire of ion chamber and take out the IC of the magnetic receiver. Move it to see if you have random beeps.....
__________________
Geo |
#8
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Thank you very much Dear friend , I don't know where to start, I'll take your advice ,
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#9
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- I cut the red wire of the ionic chamber and I removed the IC from the magnetic receiver
- when the switch (deep sensitivity) is in the ( normal ) position , no beep when the device is in movement - when the switch (deep sensitivity) is in the ( high ) position , beep in any movement even with low sensitivity |
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