Boss PSA-120 adaptor

jolynyk · Post by **jolynyk** » 19 Feb 2004 6:34 am

I have a Boss PSA-120 power adaptor, & when I wiggle the cord right where it comes out of the adaptor in the rubber sleeve it crackles & cuts out, obviously a break, or about to become a break.. I see there are 2 screws at opposite corners to take it apart.
Can these in fact be taken apart, & has anybody been successful in repairing these cords.......... Thanks.... John

Paul Osbty · Post by **Paul Osbty** » 19 Feb 2004 2:50 pm

John,

It is very typical where you have found the intermittent wire. Although I don't have that exact adapter, most all of them are the same. I just repaired one for a keyboardist inside of 10 minutes.

Open it up and you will see that the two wires go through that rubber grommet (strain relief) that feeds the wires through the case.

Cut the wires back about 3 to 6 inches and resolder them to the circuit board. Pay attention to the "polarity". It is AC feeding the circuit board, but I always re-wire things EXACTLY as original.

You can use RTV or black tape or whatever to make a new grommet.

jolynyk · Post by **jolynyk** » 19 Feb 2004 5:28 pm

Paul, that rubber grommet (strain relief), can it be used again, does the wire just slide through it?? or can I just slice through it lengthwise, kind of peel it off the existing wire & use it again?? or is it molded to the wire?? Here comes my intelligence again, DUH, what is RTV?? Just thought I'd better get all these things answered so as to know what to expect when I get into it... Thanks....John[This message was edited by jolynyk on 19 February 2004 at 05:29 PM.]

Pete Burak · Post by **Pete Burak** » 19 Feb 2004 5:58 pm

I brought 2 of these back to life recently.

The wires on mine were making contact with the circuit board just fine, so I cut the stress relief grommett out of the line (oddly enough, this is where the wire breaks), stripped the wires back a 1/4" (Note: The ends connected to the board are pretty short at this point, so get it right the first time!

), slid some shrink wrap over the 2 cords, and soldered them together (one of the cords has a printed pattern on it to identify polarity).
Shrink the shrink wrap onto the soldered spot, and put a plastic zip-tie over the cord on either side of the case (one on the inside, one on the outside) to create a new "stress relief" thing-ee (there's probably a better way to do this, but hey, it works).
I then used two 1/2" wood screws (with phillips heads) to put the case back together (the original screws are a hassle).

RV3 - No-Batter-ee! (repeat chant as neccessary)

[This message was edited by Pete Burak on 19 February 2004 at 06:13 PM.]

jolynyk · Post by **jolynyk** » 19 Feb 2004 8:49 pm

Thanks Pete, Just hate to think a person would have to throw it away because of a wire break.. would be nice if somebody would sell these little rubber Stress relief (booties), for lack of a better word.. but I got some good advice now.. gonna dive into it tomorrow after I borrow me a soldering gun, or a welding torch... ha. John

Paul Osbty · Post by **Paul Osbty** » 20 Feb 2004 3:15 am

Yea, sometimes those grommets can be pulled or cut off and reused. Give it a try.

Radio Shack sells grommets. You can also go to a Home Depot type store and they should have grommets and the RTV. They will know what either is.

RTV is clear and somewhat like caulking.

jolynyk · Post by **jolynyk** » 20 Feb 2004 4:57 am

Thanks Paul,
I will check out Radio Shack, but I will try to cut off the existing grommet, either way, with the help from Forum members, I'm gonna fix this thing... Thanks for all the help I've recieved.. John