Minelab E track power supply?

[crni1]

Can one of you help me?
I have Minelab E track I gave my friend to work, forgot to charge the battery, and connected the detector to the 12V 7A battery (probably turning the poles + -) and the detector is no longer working.
Which plate is the power supply? Every help is welcome. I have not opened it yet because I do not have any information.

[crni1]

I think the problem is here:

[Sean_Goddard]

Can you zoom in on that area please? What makes you think it is that area?

[crni1]

Thank you for your interest, Mr. Sean_Goddard.
I read on a Russian forum and they say this:
"The batteries are installed in the back cover of the unit and the cable is connected to the connector J10." The transistor K101 protects the circuit from the reverse power. "Voltage + BAT is continuously applied to the circuit and ULF, therefore, I recommend to Minelab metal detectors (they have similar power schemes ) "
"On the K104 transistor, the device turns off when the batteries are fully discharged - when the battery voltage is below xx volt, the 0 signal is set to the ERR output and switches off the U101"
"The stabilizer is controlled at the input of the SHDN using the on-off pulse designer on the U103 and the trigger U104. When the ON button is pressed, the pulse is sent to the CLK input of the trigger (counting), the output voltage appears at output K and includes the stabilizer"
Tomorrow I will set a better photo.

[Sean_Goddard]

If you can provide a list of the numbers on the top of each transistor, I will try to post a link to a SMD identification site where you can tell if PNP or NPN (do you know how to test these using a diode tester)?

It should be a simple task to identify the one transistor which I suspect has gone open circuit.

[crni1]

To know that I'm using a diode tester.
Tomorrow I will make a list of the transistor

[crni1]

I apologize to the members and Mr. Sean_Goddard, I was ill these days.
All transistors of D101-104 are A6t and they are all OK, these are diodes if I'm not wrong (BAS16, BAV62 = 1N414,the malfunction is not there.
When I start the detector, a short sound is heard and interrupted, there is nothing on the display.

[crni1]

I replaced some diodes BYS045, transistors, and 2 electrolytic capacitors 220 and 1000uf and the detector was working.
However, there was a problem that did not react to metal, only a little detected the box with electronics.
This place on the plate is hot.

[crni1]

In the images, I marked some of the SMD components and below are their tags with the numbers on the tile.
This IC circuit (?) I do not know what it looks like and it's wrong.
U706=?
U103,104,105,201,202,203=74HC4053D
U707=R2C
D605=A6t
Q503=S45
Q594=S44
Q601=9CC
Q703=8CC
Q710=WJ3
I would ask for help if someone knows the value of this IC circuit U706 to help me.

[crni1]

Is it possible that this IC LP295x is Micropower Voltage Regulators