Minelab Explorer

[Orbit]

Minelab explore failed does anyone know which components are marked on the pcb for power supply ? yes and a resistor in between capacitor C501 and C502 he seems to have jumped out does not exist ?!
the other side---

[Altra]

Hi Orbit

I looked at my explorer pcb

The missing resistor between C502 and C501 is a 100 ohm "101" size 805. The same as the resistor above "101"

The 8 pin ICs are dual mosfet, not sure if it is p or n channel? Usually for "soft switch" designs p channels are used to switch the high side B+. You can check the drain to source diodes to identify if P or N.

Possible parts
IRF7104 p-ch

https://www.infineon.com/dgdl/irf710...5355f111081ace

IRF7373 n-ch

https://www.infineon.com/dgdl/irf731...redirId=112278

I'll check the diodes and sot-23 parts tommorow.

[Orbit]

Thank you very much Altra !

[Altra]

I checked the drain to source diodes on the SO-8 ic's.

In your photo the upper ic appears to be a dual N-P mosfet. Maybe a IRF7319 or Si4562


The lower ic is a dual p channel like a IRF7104 or better Si4925

The missing sot-23 on my pcb is marked "702" which cross reference to a 2N7002 mosfet.

The other sot-23 marked "A6s" crosses to a BAS16 diode and the last one "5Dp" BC327 transistor.

Verify the markings and use this to cross reference your parts

http://www.marsport.org.uk/smd/mainframe.htm

http://www.griederbauteile.ch/downlo...de_Catalog.pdf

[Orbit]

Hi Altra ! You are definitely right that missing component I also characterized it as 2n7002 mosfet as well as bass 16 , instead of the first above i tried irf 7313 and it heats up which would mean that the double N and P mosfet the lower one is PN mosfet. I'll try since I don't have one right now double mosfet N -P , to install something unusual to install half N and a half P mosfet , so I'll post what's going on until I get the original N -P mosfet. Frankenstein mosfet ...