Bandit 112 transtube-series, almost no volume.

[joske91]

Hello y'all!
I'm brand new here, and looking forward to help a lot of people further with their problems.
I have a little problem too, so hopefully someone could help me out!
Its about a Peavey bandit 112 transtube.
Didn't play on it like 3 - 4 years. But a few days ago, I wanted to play on my guitar, but almost no sound is coming through the speaker...
Was troubleshooting myself on this forum (by reading other posts), and came to the solution that some pots or jacks on my Amp would be bad.
So I tried some steps I'd seen on the forum, like putting a cable from send to return on the effect loop. That didn't make the change.
But if I put the cable on my Pre-amp out and power amp in, the volume is back, and the pot of the volume works properly.
My question: Where is the fault? In one of the jacks from the pre out/power in? or is the problem on the effect loop?

Thanks!

[diydidi]

So the amp has both an fx send/return, and pre out/ amp in sockets? Total of 4 sockets?
Make sure the jack socket pins close properly when the jack plug is out. They act like switches.

[Jazz P Bass]

He
So I tried some steps I'd seen on the forum, like putting a cable from send to return on the effect loop. That didn't make the change.
But if I put the cable on my Pre-amp out and power amp in, the volume is back, and the pot of the volume works properly.
My question: Where is the fault? In one of the jacks from the pre out/power in? or is the problem on the effect loop?

That pretty much nails it down to the pre out/ pwr in jacks.

Specifically, the power amp in jack.
Internal to the jacks construction is a normally closed contact that 'passes' the preamp signal onto the power amp.
If the contact is dirty or corroded, it will interfere with the preamp signal getting to the power amp.
You could try 'cleaning' it or simply leave a patch cord in the jacks.

[joske91]

Thanks for the comments! If I understand what you have said, the fault is in one of the two (or both) jackets on the Power amp in, or the pre amp out?
Willl take of the amplifier from the case and check out if the jackets are worn or corrosed.

[Fragger]

If you are going to be in there get yourself a small can of deoxit d5 and treat all the pots (little pinch hole in the back), jacks, switches... doesn`t take much. Work them after spraying. Jacks you can plug a guitar cord in the out a few times.

Radio Shack, Guitar Center sell it.

Well worth it for longer time contact reliability.

[Jazz P Bass]

Thanks for the comments! If I understand what you have said, the fault is in one of the two (or both) jackets on the Power amp in, or the pre amp out?
Willl take of the amplifier from the case and check out if the jackets are worn or corrosed.

It will be the Power Amp in jack.
The Pre Out has nothing to do with it.

Depending on the jack type, like a totally enclosed jack, you may not be able to 'see' anything.

[joske91]

Found the problem! It was like Jazz P Bass said, the power amp in was bad. The jacket was ok, but there were 2 soldings broken. Resolding these 2 did the trick.
Thanks a lot guys, now I'm ready to play my girlfriend out of home again!