Boss ps-2 no power through adapter. Power through battery

[Locrian99]

Hello,

Buddy of mine brought this to me and I'm pretty sure I've figured out the problem but I'm not positive on the best path to fix.   

So as stated works fine off battery power, does not work on the adapter.   

Here's is the service manual.

https://www.synthxl.com/wp-content/uploads/2020/04/Boss-PS-2-Service-Manual.pdf

It appears to me the pad for the part of the dc jack that connects to the middle of the EMI has lifted.    I do not have continuity between there and the middle of the emi.   It appears to me this ground. 






Also here is with arrow to pad that appears to be lifted to me. 




One side of d1 and the middle of the emi have continuity.   

Should I just be able to run a jumper from the broken pad pin to d1?   Or is there a better way to make a long lasting fix.

Thanks

This didn't fix it. 

[Locrian99]

Well I confirmed continuity between the center pin and center of emi, d1 and the "lifted pad" pin.   This was with my jumper.

[MrStab]

Surely the DC socket just needs replaced or cleaned?

[Locrian99]

Well the pad that seemed to be lifted made me think otherwise.   I do not have continuity between the dc jack and d1 or the middle
Of the other pad I would expect to without the jumper I put in.  But that still didn't solve it.    I don't have a replacement jack handy.      Though I suppose I could wire another switched jack in there to see if it works. 

I also read 9V at the board side of the jack and. 9V when measured on the emi with the ground at the jack not when at where I would expect to see ground at d1 or the emi. 

[MrStab]

Ah okay I think i see the problem: the ground trace has ruptured. Ground from the battery's negative terminal comes in elsewhere (input jack), hence why it works. Ground from the DC plug goes to the anode of D1 and EMI cap, but nowhere else.

Try making the blue connection shown here:

[Locrian99]

Ah okay I think i see the problem: the ground trace has ruptured. Ground from the battery's negative terminal comes in elsewhere (input jack), hence why it works. Ground from the DC plug goes to the anode of D1 and EMI cap, but nowhere else.

Try making the blue connection shown here:

Thank you will do looks like I was looking at it backwards ?

[Locrian99]

Fixed thank you very much.   Guess I needed both jumpers?   I didn't try it without the other.

[MrStab]

No worries! The original jumper probably isn't necessary, from what I can tell, but it can't hurt.