Need help to fix old RC controller

[Ralf Kalkuhl]

I dont know anything about circuits i just need help to solder the negative wire back to the board i just dont know where to solder the wire on the board any help would be appreciated.

 

[Harald Kapp]

Show us an image of the back of the pCB.
It may also help to know which chip is under the label "Modul Nr. 40018" as knowing where the chip's ground pin is helps identifying the trace to the wire pad.

 

[Bluejets]

Good chance that the negative sign (-) on the electrolytic capacitor will be the negative rail.

It's the can looking device between D3 and R8.

Nice clear photo of the reverse side of the board would help also.

 

[Harald Kapp]

Good chance that the negative sign (-) on the electrolytic capacitor will be the negative rail.

Good hint.

 

[Ralf Kalkuhl]

Here's a pic of the back and the chip

 

[Ralf Kalkuhl]

thanks guys i actually got it working again the ground rail was on that can thing