guitarmech111 Posted October 12, 2013 Share Posted October 12, 2013 here is the problem I am having. I like to have a little reverb from the DT25 in my patches when using the dream rig. Lately, when switching to a patch, the reverb on channel A does not always work when I adjust the amp knob. I have had an issue where I go to turn the reverb all the way off on the amp, but the reverb still persists.IF I hold the knob for a scond or two full off, twisting it till it will not move any more and hold, it will go off. If I select a patch and turn the reverb up on the DT25, the reverb will never go off. I have to hold the reveb knob all the way off by rotating and holding the reveb knob fully off for a 1 second count. I went through all this with support and they said it sounds like I may have a bad reverb knob and need to have it serviced. It is a little over a year old and out of warranty. I am tired of having line6 equipment go south on me and just outside of warranty. I spent too much money on this dream rig to have it serviced shortly after the warranty goes out. It is almost as if there is a planned obsolescence and you should always buy the extended warranty for any line6 product.I am wondering if it may be the month or twio older firmware change that has to do with this or not. When I switch the patches, the amp responds as expected. It is only when I twist the reverb knob on channel A that the DT25 goes south. Channel B does not exhibit this behavior. Quote Link to comment Share on other sites More sharing options...
guitarmech111 Posted October 12, 2013 Author Share Posted October 12, 2013 Just downgraded the firmware, same problem. I plugged straight into the amp with the 1/4" plug and the issue is still there. Looks like a problem with the amp... Not a happy camper... Quote Link to comment Share on other sites More sharing options...
Rowbi Posted October 12, 2013 Share Posted October 12, 2013 I can empathise with your issue - but the only people who sell the extended warranties are the guitar stores. Line 6 don't offer any sort of warranty extension, so they wouldn't profit from anything more than the purchase of spare parts - which for a potentiometer would only be minimal (and the repair shop may just use a generic pot anyway). I think L6 would be more concerned with having repeat business from customers - as that's how you build recurring revenue by improving reliability of products. it sounds like a faulty pot, which although it shouldn't fail after a year, they do fail on all amps eventually (the usual scratchy pots). Perhaps you can have a local tech take a look as it may only need 30 mins and minimal labour and parts cost to replace the faulty pot to see if that resolves it. Let us know how you get on with the repair please, as I'd be interested to know how the repair goes. Cheers Rowbi Quote Link to comment Share on other sites More sharing options...
guitarmech111 Posted October 16, 2013 Author Share Posted October 16, 2013 I really don't think it is the pot though. I have a gut feeling that something got whacked in the firmware or a digital component. I have the equipment and expertise to replace the pot. I need to source one. I was actually thinking of selling the whole dream rig though. I have had way too many L6 products fail right after the warranty runs out. Quote Link to comment Share on other sites More sharing options...
ozbadman Posted October 16, 2013 Share Posted October 16, 2013 Just downgraded the firmware, same problem. I plugged straight into the amp with the 1/4" plug and the issue is still there. Looks like a problem with the amp... Not a happy camper... Sounds like it's the potentiometer itself. I haven't had my DT25 apart, but I would imagine it's a standard pot. Since it's out of warranty anyway, any local electronics dude could probably fix it. Just be sure to warn them it's a tube amp, so there are high death-causing voltages in there, even when it's turned off (big capacitors). Quote Link to comment Share on other sites More sharing options...
stumblinman Posted October 18, 2013 Share Posted October 18, 2013 Sounds like it's the potentiometer itself. I haven't had my DT25 apart, but I would imagine it's a standard pot. Since it's out of warranty anyway, any local electronics dude could probably fix it. Just be sure to warn them it's a tube amp, so there are high death-causing voltages in there, even when it's turned off (big capacitors). Since I just pulled my DT25 apart to retube/bias I thought I might say what I noticed. There is a PCB that runs the full length of the knobs inside, which looks like the pot is soldered to. I could not get a good view of the pots because of the other internal stuff, but it looks like it might be more complex than just a pot swap. Quote Link to comment Share on other sites More sharing options...
ozbadman Posted October 18, 2013 Share Posted October 18, 2013 Since I just pulled my DT25 apart to retube/bias I thought I might say what I noticed. There is a PCB that runs the full length of the knobs inside, which looks like the pot is soldered to. I could not get a good view of the pots because of the other internal stuff, but it looks like it might be more complex than just a pot swap. It's pretty common to solder pots directly to the circuit board. I know Line 6 uses specialist pots in their JTVs, but I can't think of any reason that would be necessary for the DT amps. As you point out, they may be hard to get to, but I would still expect it to be just a pot swap. Of course, I could easily be wrong. :) Quote Link to comment Share on other sites More sharing options...
guitarmech111 Posted November 18, 2013 Author Share Posted November 18, 2013 just ordered the pot today. They are cheap and I am not really confident that these are good quality. The pot should be here is a few days. I just had a toggle switch go bad on my JTV. I am convinced that Line6 uses the cheapest chinese made crap they could get their hands on. My toggle switch is fully functional, but broke where the plastic cap meets the post. Like cheap pot metal snapped. Not a happy camper about that or my dream rig experience!! Quote Link to comment Share on other sites More sharing options...
ozbadman Posted November 19, 2013 Share Posted November 19, 2013 Unless it's a specialty pot, there's no reason you couldn't replace it with a better quality one. Quote Link to comment Share on other sites More sharing options...
guitarmech111 Posted November 23, 2013 Author Share Posted November 23, 2013 replaced the pot. It was only a couple bucks and about an hours work. The new pot solved the problem. 1 Quote Link to comment Share on other sites More sharing options...
ozbadman Posted November 24, 2013 Share Posted November 24, 2013 Congrats. Quote Link to comment Share on other sites More sharing options...
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