EHX Q Tron Plus - Problem

[Axxis]

Hello, good people!

I just went to London and bought an EHX Q Tron Plus. It’s the old design, with the big, flat and flashy box. Well, I bought the pedal in a “vintage guitar”-shop I Denmark street. It did not come with a power supply, so I got the thing for 70 pounds. The first thing I did was to buy a power supply I got presented by a Norwegian musician forum. It works, but does not go completely inside the hole, but the box powers up… I opened the box and was a bit disappointed. Several parts were not in the right place or not properly installed. Anyways, I fixed it.

The big problem now is that when I play with the effect, the sound becomes very low. If I have the Q Tron in “normal”, the sound is so low, you can’t hear it. I need to put it in “boost”, and gain to the max, to even hear some sound. The “Overload” light lights up all the time, even in normal mode, and in some way lower the sound. If I wait some seconds, not playing, and I then play one note really fast, it comes through, but then the “overload”-light lights up again fast
.
I’ve used my Fender JB MIA and a FLEABASS.

Does anybody know anything about this problem, or know how I can fix this…?

Greetings from Norway
- Axel

[RCCollins]

it's hard to know without knowing what modifications you did when you had it open

[Axxis]

I did not modify anything. One of the switches had "fell off" so i put it back together.
It was like this before I opened it up.

And in the power input, the flat metal part, touching the side of the power supply pin, were loose, so I fastened it.

So, no mods, only tightening stuff...

[Axxis]

Hello. I figured how I could Get it to work propperly! If I use a jack-cable between FX send and return, it works. Could it be some wireing problem?

[cheapbasslovin]

Yes. The return is supposed to have a switch integral to it that opens the circuit between the PCB and Output when a plug is in place, and closes the circuit when there is no plug in place. Either the wire from the PCB has become disconnected, the jack has become corroded and the switch never makes contact, or the jack has warped out of spec and never makes contact. I have an old Plus that I need to get into. If I have a chance soon, I'll look at it and see where that wire goes to.