Mini 3 board repair

VitaliyK · Jun 20, 2025

After drone was drown, I tried to wash it. At one point I made main board response. As I hade issue with pairing I decided to clean it again. Big mistake

Several resistors were brushed away.
Does anyone have schematic, PCB layout or high quality pictures with visible components? Attached picture with missed resistors.

Max Headroom · Jun 20, 2025

After drone was drown, I tried to wash it.

You washed your drone, is this a wind up?

Exphantomflyer · Jun 20, 2025

Pad 7 and 8 looked destroyed, thats a call for a microscope and a very steady hand

VitaliyK · Jun 20, 2025

Max Headroom said:
You washed your drone, is this a wind up?

I just connected battery, power board and main PCB. I had charging and LED sequences working.

VitaliyK · Jun 20, 2025

Exphantomflyer said:
Pad 7 and 8 looked destroyed, thats a call for a microscope and a very steady hand

This connector is not used. Actually here is no socket installed. Looks like I just lost several resistors. For LEDs they are 470 ohm and 10 kOhm.
Also I need part number for SMD socket between main and power boards.

Cafguy · Jun 20, 2025

Is doing that really worth it? I mean you can get that board for around 50 bucks.

VitaliyK · Jun 21, 2025

Cafguy said:
Is doing that really worth it? I mean you can get that board for around 50 bucks.

Call this hobby. Here such board over 100 and I'm not sure the rest is OK. Battery I fixed with 18650 cells.

Dogpilot · Jun 28, 2025

If you go to this link for Aliexpress 3this seller has lots of photos of the board:
Aliexpress mini 3 board

VitaliyK · Jun 28, 2025

Dogpilot said:
If you go to this link for Aliexpress 3this seller has lots of photos of the board:
Aliexpress mini 3 board

Hi. Thanks for the link. $156 for used board ?!?!?! Here pictures much better DJI Mini 3 Chip ID

Does anybody have resistors nominals and connector part number (or brand name)?

Dogpilot · Jun 28, 2025

I know, the price of any main board is absurd. However, if you have a dead one or a bound one, it could be a bargain. Sometimes buying a complete broken drone is not a bad way to go, you do usually have the issue of it not being unbound. If you just need parts, well then it could be a deal. Sell off what you don't need. I have seen people selling a mini 3 for $250, complete here, recently.