Please Help Mega Vibe problem

[Bobhfd81]

I have a KR Mega Vibe that just quit working all of a sudden.
Was just wondering if anyone had any idea why or have seen this problem
before. Everything powers up just fine and I get the bypass signal
but when I go to turn it on I get nothing. I opened it up and nothing
appears to be loose. any suggestions?

 

[bluesoul]

Had the same problem with a tube screamer...I pulled all the guts out and checked every solder connection with a magnifying glass until I found a cold joint on a resistor leg. You could also use a tooth pick and check each leg of resistors and caps etc for movement. Or save yourself the time and send it to Classic Amplification...Brad Burt. He is the guy to send a univibe (or clone) to.

 

[Roffe]

Have you checked The bulb?

 

[Sol]

I have a faulty Mega Vibe, which went from perfect to a scratchy distorted type sound.
Devastating, as it was by far the best of all the UniVibe types Ive tried, or at the very least my favorite.

Any ideas would be very welcome

 

[windjamma]

post it to gee electronics i reckon john could fix it

 

[bluesoul]

You can use a multimeter to test the path of voltage and find where it ends..usually a cold solder joint or maybe a component (cap resistor etc) gone bad. You can chase your tail around for hours and still not find anything if you are not sure what to look for!
If you want to LOOK with your eyes and hopefully see something...check all lead wires for loose connection and any place a short could occur. Pots and jacks can get a bit loose and move and short against something.
As good as those pedals are...well worth a little expense to have someone find and fix the problem. Email Brad at Classic Amplification.

 

[bluesoul]

I should have asked...when you say it powers up. Are you seeing the LED flashing? It always flashes even when not engaged (as I recall). When you engage the effect, does the 2nd LED come on?

 

[Bobhfd81]

Yes the LED flashes and the second LED comes on as well.

 

[bluesoul]

OK..that is good! Your power supply is doing it's job and voltage up to that point it is there. Somewhere past that point is ending the signal. You eliminated part of the circuit. I am betting one of the wires is loose or bad joint joint on the board...could be at the switch, or jacks too. Most likely not a failed component. Some times a bad connection is not easy to see...you may find it by moving and wiggling things. I have seen too many times a connection that looks fine until I grab a wire that is barely hanging. Pushing down on each leg of components on the board can reveal a bad joint...it will move. Good luck.

 

[Bobhfd81]

I will give that a try tonight, thanks for the help.

 

[Bobhfd81]

I tried pushing and wiggling wires and the bulb is working fine. can anyone describe
how to check w/ a multimeter?