| Author |
Topic: Peavey LTD tripping circuit breaker |
Jordan Stern
From:
Texas, USA
|
Posted 19 Jun 2024 11:04 am |
|
| Hi there. I have an early Peavey LTD that trips the circuit breaker when I plug it in. I don't even have to power on the unit, it trips the breaker even when the switch is in the off position. I sent the chassis to Peavey for repair, and I just got a call from them, saying there is nothing wrong with it. They suggested it might be the speaker itself causing a short circuit. The speaker is a Peavey labeled JBL 15". Any ideas? I have a couple more 15 inch speakers around, I just would like to stick with the factory JBL if I can. |
|
|
 |
Jeff Highland
From:
New South Wales, Australia
|
Posted 19 Jun 2024 1:24 pm
|
|
That sounds unlikely (impossible) that a speaker fault would trip your house breaker when plugged in without being turned on.
The problem would have to be before the transformer primary.
Possible culprits
-bad power cord
-bad IEC power socket if this has one
-shorted fuse holder or fuse
-shorted power switch
-wiring associated with the above
_________________
Duesenberg Fairytale
1949 Supro Supreme
1950 National New Yorker
2008 Highland Baritone Weissenborn
2020 Highland New Yorker.
2020 Highland Mohan Veena
2021 Highland Weissencone |
|
|
|
Bill A. Moore
From:
Silver City, New Mexico, USA
|
Posted 19 Jun 2024 2:18 pm
|
|
| I assume you've tried different outlets, and the outlet isn't GFCI protected. |
|
|
|
Jordan Stern
From:
Texas, USA
|
Posted 19 Jun 2024 2:31 pm
|
|
| Yup, I’ve tried outlets in different parts of my house. Even tried it at a venue and tripped the stage power. |
|
|
|
Ricky Davis
From:
Bertram, Texas USA
|
Posted 19 Jun 2024 3:04 pm
|
|
_________________
Ricky Davis
Email Ricky: sshawaiian2362@gmail.com
Last edited by Ricky Davis on 19 Jun 2024 4:11 pm; edited 1 time in total |
|
|
|
Jeff Highland
From:
New South Wales, Australia
|
Posted 19 Jun 2024 3:11 pm
|
|
Polarity of the speaker terminals will only affect the phase of the sound produced, the speaker coil does not care which is + or -.
Got to be something pre-power transformer if it trips breakers when turned off.
Does the fuse blow?
If you remove the fuse, does it trip the breaker when you plug in?
_________________
Duesenberg Fairytale
1949 Supro Supreme
1950 National New Yorker
2008 Highland Baritone Weissenborn
2020 Highland New Yorker.
2020 Highland Mohan Veena
2021 Highland Weissencone |
|
|
|
Jeff Highland
From:
New South Wales, Australia
|
Posted 19 Jun 2024 3:48 pm
|
|
Are you CERTAIN that the switch was in the off position when plugged in?
Whilst it seems impossible for the speaker to be the culprit on the information you have provided, it is straightforward to check it for a short.
Just unplug the terminals and use a multimeter on Ohms to measure between them
A 4 ohm speaker will read about 3 ohms DCR and an 8 ohm will give around 7.
A short is going to read significantly lower.
A lot quicker than swapping speakers.
_________________
Duesenberg Fairytale
1949 Supro Supreme
1950 National New Yorker
2008 Highland Baritone Weissenborn
2020 Highland New Yorker.
2020 Highland Mohan Veena
2021 Highland Weissencone |
|
|
|
Jerry Overstreet
From:
Louisville Ky
|
Posted 19 Jun 2024 4:53 pm
|
|
Well yeah, a shorted out speaker will fry the amp which in turn could throw the breaker, but if Peavey has given the amp a clean bill of health?......
I'd try disconnecting the the speaker leads to see it that makes a difference.
If it's not, then I have to think maybe Peavey missed something in their evaluation. I know of nothing besides bad amp electronics or a shorted power cable that would trip a breaker. Since it throws the breaker just being plugged in, not even switched on, I'd suspect the power cable wiring or terminals, but I should think Peavey techs would've seen that. |
|
|
|
Jeff Highland
From:
New South Wales, Australia
|
Posted 19 Jun 2024 10:35 pm
|
|
Yes, a short in the speaker (or speaker leads) is likely to take out the output transitors. Can't imagine that Peavey would not have found that.
And unless the power switch is defective (shorted on permanantly) a problem like that should not cause a breaker to trip whan plugged in but not turned on.
_________________
Duesenberg Fairytale
1949 Supro Supreme
1950 National New Yorker
2008 Highland Baritone Weissenborn
2020 Highland New Yorker.
2020 Highland Mohan Veena
2021 Highland Weissencone |
|
|
|
Jack Stanton
From:
Somewhere in the swamps of Jersey
|
Posted 20 Jun 2024 1:23 pm
|
|
| The LTD has a circuit breaker? How do you reset it once it trips? |
|
|
|
Darvin Willhoite
From:
Roxton, Tx. USA
|
Posted 20 Jun 2024 7:31 pm
|
|
My LTD has a fuse.
_________________
Darvin Willhoite
MSA Millennium, Legend, and Studio Pro, Reese's restored Universal Direction guitar, a restored MSA Classic SS, several amps, new and old, and a Kemper Powerhead that I am really liking. Also a Zum D10, a Mullen RP, and a restored Rose S10, named the "Blue Bird". Also, I have acquired and restored the plexiglass D10 MSA Classic that was built as a demo in the early '70s. I also have a '74 lacquer P/P, with wood necks, and a showroom condition Sho-Bud Super Pro. |
|
|
|
Richard Sinkler
From:
aka: Rusty Strings -- Missoula, Montana
|
Posted 20 Jun 2024 7:46 pm
|
|
| Jack Stanton wrote: |
| The LTD has a circuit breaker? How do you reset it once it trips? |
I believe he is talking about the circuit breaker for the A.C. power in his house, not in the amp.
_________________
Carter D10 8p/8k, Dekley S10 3p/4k C6 setup,Regal RD40 Dobro, Recording King Professional Dobro, NV400, NV112,Ibanez Gio guitar, Epiphone SG Special (open D slide guitar) . Playing for 54 years and still counting. |
|
|
|
Darvin Willhoite
From:
Roxton, Tx. USA
|
Posted 21 Jun 2024 4:07 am
|
|
The fuse should blow way before the house circuit breaker trips, unless you have a lot of current draw from other things on the same circuit.
_________________
Darvin Willhoite
MSA Millennium, Legend, and Studio Pro, Reese's restored Universal Direction guitar, a restored MSA Classic SS, several amps, new and old, and a Kemper Powerhead that I am really liking. Also a Zum D10, a Mullen RP, and a restored Rose S10, named the "Blue Bird". Also, I have acquired and restored the plexiglass D10 MSA Classic that was built as a demo in the early '70s. I also have a '74 lacquer P/P, with wood necks, and a showroom condition Sho-Bud Super Pro. |
|
|
|
John Ducsai
From:
New Hampshire, USA
|
Posted 21 Jun 2024 6:38 am
|
|
I would check/change the power cord.
 |
|
|
|
Bruce Derr
From:
Lee, New Hampshire, USA
|
Posted 23 Jun 2024 7:56 am
|
|
| John Ducsai wrote: |
| I would check/change the power cord. |
+1
If the cord's plug has been replaced, check for a miswire there. Peavey probably powered the amp from an isolated power source, which could explain why they didn't see the problem. |
|
|
|
Jacobus De Bruyn
From:
NSW, Australia
|
Posted 27 Jun 2024 7:11 pm Amp trip power
|
|
| I am a electrical eng and used to fix amps as a hobby. If the amp output IC’s is not shorted I suggest your amp earth or neutral is open circuit. Meaning the neutral takes the shortest path through the earth wire. It can go the same if your earth is open along the lines. It trip because the live power current do not equal the neutral current. If a speaker is shorted it will blow a fuse or fry the output transistors. Your issue is on the input voltage. |
|
|
|
