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Topic: Help! Nashville 112 lost most of its volume |
Don R Brown
From:
Rochester, New York, USA
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Posted 7 Jan 2016 7:51 pm |
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Cliff notes: Nashville 112 lost most of its volume after being moved.
Up front let me say I'm relatively green on the sound end of things. So if I don't describe something quite right, or have to ask for clarification, please bear with me.
I have a Nashville 112, and just recently picked up a Roland Cube. Other than some jams in summer, I don't play out so the equipment stays pretty much unmoved. I have been running a line from the earphone jack of my computer to the "CD Input" jack on the back of the 112. This lets me play YouTube songs right there to practice with. Until I got the Cube about 3 or 4 weeks ago I ran the steel into the high gain jack on the front of the 112 also. But since then I've been experimenting with the Cube and the steel goes through that.
Today we had the carpet cleaned and I took everything out of the room. When I hook everything back up as it was, the Peavey has lost most of its volume. I have unplugged and re-plugged, I've tried running the steel through the 112, I've tried running the computer feed through the Cube. No matter what way I do it, Cube works, Peavey is very quiet. With the volume pedal really mashed I can get enough out of the 112 to be about "normal" but that SHOULD happen at about 1/3rd pedal, not at wide open. All the knob settings on the 112 are as they were.
One other thing I noticed. I know the advice about not plugging / unplugging "hot". The few times I have done it in the past, I would get the typical "pop" or gunfire report. While trying to diagnose this tonight I realized I had pulled and re-plugged without cutting power, but I'm not getting any pop.
I think it's my wife's fault for wanting to have the carpet cleaning company come in. But maybe I'd better keep that opinion to myself.  Anybody have suggestions on what's going on?
Thanks in advance! |
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Georg Sørtun
From:
Mandal, Agder, Norway
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Posted 7 Jan 2016 8:15 pm
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Have no idea what's wrong, but to help with figuring it out you can try plugging your steel into the "return" jacks on the front panel one after the other to find out if the problem is in the pre, eq or power stage.
Try in the following order:
- steel into post eq patch "return".
- steel into pre eq patch "return". |
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Don R Brown
From:
Rochester, New York, USA
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Posted 7 Jan 2016 8:35 pm
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| Georg, thanks for the suggestion. There seems to be no difference in volume between the low gain jack, the post-eq return, and the pre-eq return. It does seem louder in the high-gain jack, but with the volume pedal all the way down to the floor it is only about "normal" practice volume - whereas before I could, if I wanted, put out enough volume to be uncomfortable in the room I'm in. I'm not sure what that tells us, but it's a start I guess. |
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Georg Sørtun
From:
Mandal, Agder, Norway
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Posted 7 Jan 2016 9:14 pm
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So far it seems all stages before the power-stage are working, so the loss is after the post eq patch point.
Lastly, you can try plugging an audio-source into the Power Amp In at the back-panel. A steel PU won't work well there, impedance-mismatch - unless you have a buffer or active VP after it. Most other sources should work with the low impedance on Power Amp In. |
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Jeff Bollettino
From:
Virginia, USA
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Posted 8 Jan 2016 1:42 am
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Don,
I can't tell if you've already tried these steps but here's a few ideas to isolate the trouble:
First, if you've got anything plugged in to the back panel (headphone jack, remote switch, etc) unplug them for this testing
1. Double-check your knob settings to make sure something didn't get changed in the move. Rotate all the knobs full CCW and then bring back to desired setting. Verify problem remains
2. Run a cable directly from the guitar (no volume pedal) to the Peavey input and verify that it's still low. Plug this same cable into the Cube and verify that it's normal.
3. Repeat #2 with a different cable
4. If problem remains at this point I think we've isolated it to the amp. Thinking about the amp being moved and what might happen mechanically, unplug the amp from AC power and check that the speaker connections aren't loose. Also, power still off to prevent popping, insert/remove a guitar cable plug a couple of times in/out of the 4 jacks on the back. These jacks have built-in switches which might not fully open/close when old or dirty and might have been jostled in the move. If you have some contact cleaner spray you could also try it on those jacks.
5. If problem remains, I would try giving the amp a jolt (physically) to see if anything changes - basically hitting it or rocking it and letting it land with a little bit of a thud to see if anything internal is loose. Many amp problems turn out to be mechanical.
Hope this helps you |
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Tony Prior
From:
Charlotte NC
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Don R Brown
From:
Rochester, New York, USA
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Posted 8 Jan 2016 6:08 am
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Good morning! I start the day off with 3 helpful suggestions. It will be a bit later in the morning before I have time to attack this, but will let you all know how it works out.
Thank you!!! |
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Mike Brown
From:
Meridian, Mississippi USA
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Posted 8 Jan 2016 9:17 am No output
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| Don,are you getting audio from the headphone output? |
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Don R Brown
From:
Rochester, New York, USA
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Posted 8 Jan 2016 10:27 am
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The good news is the amp is working as intended now. Bad news is I'm not 100% sure what the issue was.
Even tho I went through everything last night, the first thing I did this afternoon was verify what Mike Brown asked about audio from headphone jack of the computer. Plugged into the 112, could barely hear the song from the computer. Changed nothing, plugged into the Cube, sounded great.
NOW - plugged it back into the 112 again (same place, the "CD INPUT" jack on the back) and it sounded a little louder. I plugged and unplugged it several times and normal volume came back. Sat down at the steel and it too is fine now - good volume (that is plugged into the "high gain" jack in the front of the amp, as it has been.
So it seems I had a bad connection at the input on the rear of the amp, but I'm not sure why it also affects the one on the front. I have some spray electronic cleaner, I'll spray the male plug and repeat the plug-unplug a few times - I'm a little reluctant to just blast into the jack itself with the stuff.
Any other suggestions, comments or whatever? Thanks to all who offered help - I appreciate it! |
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Don R Brown
From:
Rochester, New York, USA
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Posted 8 Jan 2016 10:29 am
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| And Mike - on further thinking, I now guess you meant out of the headphone jack of the 112, not headphone jack of the computer TO the 112 which was what I thought you meant. Regardless, verifying that is what led me to the issue. |
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Mike Brown
From:
Meridian, Mississippi USA
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Don R Brown
From:
Rochester, New York, USA
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Posted 8 Jan 2016 11:04 am
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Amp is working fine now, back to how it was.
The stuff I had on hand is CRC QD Electronic Cleaner. Is it OK to spray directly into the jack, or was I better off doing what I did, putting it on the male and then plugging it in? |
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Georg Sørtun
From:
Mandal, Agder, Norway
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Posted 8 Jan 2016 11:22 am
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So, you had a bad (dirty) jack or jack-switch? Not uncommon in amp patches.
Electronic cleaner should be safe to spray around in/on the circuits, but it makes sense to - as you have - limit its spread to where it is really needed.
Not all materials (plastics etc) used in and around electronic circuits are totally "immune" to all cleaning agents. |
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Mike Wheeler
From:
Delaware, Ohio, USA
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Posted 8 Jan 2016 12:09 pm
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Don, the direct answer is no, don't spray the cleaner into the jack opening. That could get the liquid onto components that shouldn't get wet.
You did exactly right...spray the plug and then insert it in and out of the jack a few times. I'd recommend repeating that action 2 or 3 times.
The only thing better would be to pull the chassis out and spray the jacks. That way you could be more accurate with the spray.
_________________
Best regards,
Mike |
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Don R Brown
From:
Rochester, New York, USA
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Posted 8 Jan 2016 12:41 pm
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| Thanks Mike! I'm relatively new to amps but dealt with a fair amount of electrical stuff before retiring and found some restraint and discretion was usually a good idea. That 112 has been fine until now and I didn't want to take a chance on messing it up. |
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Tony Prior
From:
Charlotte NC
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Posted 8 Jan 2016 1:24 pm
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The issue is one of the Jacks or two of the Jacks were dirty with oxidation, this is not UNCOMMON with PV amps. Not a diss of the amp, just a reality. When you plugged in a 1/4 connector it burnished (scraped) the internal contact point of the jack.
I still recommend removing the amp chassis, clean ALL the connectors and jacks, burnish ( remove oxidation) with a small file , do not forget the reverb connector. LOGIC says if one or two connectors/jacks were dirty, each of the others are suspect. While the amp is out also spray clean the POTS to clean them as well from noise and static.
Again this is NOT a DISS of any PV products which I believe to be second to none in quality and workmanship, the issue described is maintenance, not failure. I don't recall over the last several decades having any PV amp that I have owned actually die and need repair.
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Emmons L-II , Fender Telecasters, B-Benders , Eastman Mandolin ,
Pro Tools 12 on WIN 7 !
jobless- but not homeless- now retired 9 years
CURRENT MUSIC TRACKS AT > https://tprior2241.wixsite.com/website |
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