Minelab Sovereign XS-2 pro-needed scheme or help.

[crni1]

Is there any one of your schemes or may have had a similar problem and can and can help.
I bought the Minelab Sovereign XS-2 pro allegedly correct, but the previous owner instead of 12V. connected 2 batteries at 9V and the detector does not work.

[crni1]

Can you tell me what this component is, on the tile labeled Q6

[waltr]

Google search of "3AS marking on SOT-23" gave this:
http://www.s-manuals.com/smd/3a

A 'Q' ref des typically is a transistor.

[crni1]

Thank you Waltr,so I thought it was a transistor, I found myself.
Bc856A

[DavidB]

It is in the virtual ground circuit shown here with correct designators

[crni1]

1i 2 replaced
3 (Q4) heats up when the probe is connected.

[kt315]

first of all you must de3solder all mosfets. anotherway if there is DC level on a gate of one of them
you do NOT see right voltages.

[crni1]

Thank you all, but I will have to give up until I find more documentation, one potentiometer is on the front panel and something is intertwined with a wire.