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Topic: Trouble Shooting a Pre Amp (peavy vmp2) |
James Quillian
From:
San Antonio, Texas, USA
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Posted 5 Jun 2015 6:26 pm |
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I am not looking for an exact solution, just some possibilities to investigate. Before I take something to a shop I like to have an idea of what I might be dealing with.
The light comes on but there is no signal.
Fist, since the light comes on am I safe in thinking the fuse is o.k.?
It quit working suddenly after 14 years of good service. Tubes have never been changed. It has never been opened.
Any suggestions as to what the problem might be?
I usually replace electronic things when they quit but this is such a great pre amp I may fix it. And, they don't make them anymore.
_________________
Curbside Jimmy's New Act
https://www.youtube.com/watch?v=XlzieFLE5no |
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Bill Hatcher
From:
Atlanta Ga. USA
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Posted 5 Jun 2015 6:52 pm
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nice unit and worth fixing.
start with the tubes. try swapping one at a time with a known good one. thats your easiest starting point before you open it up.
get a schematic. see if there are any internal fuses. |
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James Quillian
From:
San Antonio, Texas, USA
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Posted 6 Jun 2015 3:12 pm
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| Bill Hatcher wrote: |
nice unit and worth fixing.
start with the tubes. try swapping one at a time with a known good one. thats your easiest starting point before you open it up.
get a schematic. see if there are any internal fuses. |
Do you have any suggestions as to what tubes would be good with this unit? They have never been changed.I know nothing about tubes.
In tube amplifiers I have had in the past, when tubes have gone bad, the unit would perform badly for a while first. This was a sudden thing.
_________________
Curbside Jimmy's New Act
https://www.youtube.com/watch?v=XlzieFLE5no |
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Bill Hatcher
From:
Atlanta Ga. USA
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Posted 6 Jun 2015 3:21 pm
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i have 3 of those units.
there are lots of 9 pin tubes in there! you need to check each one. i would have to look at the schematic to see how the gain stage is on those, but there is a possibility that one of the tubes drives both sides of the output. first, make sure the filament voltage is good...are the tubes lighting up??
if the tubes are lighting up, then check each one. start there first before checking out inside. |
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James Quillian
From:
San Antonio, Texas, USA
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Posted 7 Jun 2015 1:40 pm
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| Bill Hatcher wrote: |
i have 3 of those units.
there are lots of 9 pin tubes in there! you need to check each one. i would have to look at the schematic to see how the gain stage is on those, but there is a possibility that one of the tubes drives both sides of the output. first, make sure the filament voltage is good...are the tubes lighting up??
if the tubes are lighting up, then check each one. start there first before checking out inside. |
There are 8 tubes and none of them light up and they are cold to the touch.
There are 4 additional fuses that are visible in the second picture. I may need a tool to get them out. They look o.k. but I know that doesn't mean they are not blown. These fuses are before any electricity would get to the tubes. I may need to get a tool to take them out. Any additional thoughts?
_________________
Curbside Jimmy's New Act
https://www.youtube.com/watch?v=XlzieFLE5no |
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Mike Wheeler
From:
Delaware, Ohio, USA
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Posted 7 Jun 2015 1:55 pm
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Make sure to unplug the A/C cord, and discharge the large power supply caps before troubleshooting anything.
Sounds like you lost the heater voltage, at least...maybe the power transformer itself.
There are a lot of pin-plug connectors coming from the power supply board...unplug and clean each one, then plug and unplug them several times. (to break up any corrosion) You might have had a bad connection.
As for the fuses...just pop one end out of its holder and check the fuse with an ohmmeter...if good it should read a dead short. If the fuses all check good, I think you need a tech to look at it.
_________________
Best regards,
Mike |
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James Quillian
From:
San Antonio, Texas, USA
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Mike Wheeler
From:
Delaware, Ohio, USA
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Posted 8 Jun 2015 12:20 pm
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Hope it's something inexpensive, James. Good luck.
_________________
Best regards,
Mike |
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Lane Gray
From:
Topeka, KS
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Posted 8 Jun 2015 1:31 pm
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Total failures are usually easy to find and fix. It's when it doesn't work well (or sometimes doesn't work well) that it gets more expensive.
_________________
2 pedal steels, a lapStrat, and an 8-string Dobro (and 3 ukes)
More amps than guitars, and not many effects |
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Mike Brown
From:
Meridian, Mississippi USA
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Posted 8 Jun 2015 1:58 pm Peavey Repair Center
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You may ship the product to;
Peavey Service Center
Attn; Repair Department
412 Hwy. 80 East
Meridian, MS 39301
Please include a note of symptoms and your daytime phone number.
Thanks,
Mike Brown
Peavey USA |
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Lane Gray
From:
Topeka, KS
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Posted 8 Jun 2015 2:00 pm
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Listen to Mike. They're good, and surprisingly affordable.
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2 pedal steels, a lapStrat, and an 8-string Dobro (and 3 ukes)
More amps than guitars, and not many effects |
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James Quillian
From:
San Antonio, Texas, USA
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Posted 9 Jun 2015 7:18 am Re: Peavey Repair Center
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| Mike Brown wrote: |
You may ship the product to;
Peavey Service Center
Attn; Repair Department
412 Hwy. 80 East
Meridian, MS 39301
Please include a note of symptoms and your daytime phone number.
Thanks,
Mike Brown
Peavey USA |
That sounds like a good plan. I had no idea Peavey offered the service. Is this a formal system where they acknowledge receiving the equipment? I mean, do they do this all the time and is there a procedure for getting it back?
_________________
Curbside Jimmy's New Act
https://www.youtube.com/watch?v=XlzieFLE5no |
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Mike Brown
From:
Meridian, Mississippi USA
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Posted 9 Jun 2015 8:34 am Peavey Service
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Yes, we have 13 technicians available to repair Peavey products dating back to 1965. Believe it or not, quite a few older Peavey units are shipped to us for repair and we are glad to oblige. Our labor rate is $55.00 plus required parts to repair and your return freight costs.
We request that the complete product in question be returned to us for repair with a note of symptoms and a daytime phone number. If you need an estimate, please include that with your product with specific instructions.
Should you have further questions, please let us know. |
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Lane Gray
From:
Topeka, KS
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Posted 9 Jun 2015 11:48 am
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James, if, like me, you spend WAYYY too much time here, Peavey's repair service gets high marks. Quick turnaround, quality work, and at reasonable prices (even if their rate is higher, they're quick at finding the problem, since Peavey is all they work on).
_________________
2 pedal steels, a lapStrat, and an 8-string Dobro (and 3 ukes)
More amps than guitars, and not many effects |
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Mike Brown
From:
Meridian, Mississippi USA
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Posted 9 Jun 2015 1:14 pm Peavey Service Department
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| Lane, thanks for the PR! |
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James Quillian
From:
San Antonio, Texas, USA
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Posted 9 Jun 2015 6:12 pm Re: Peavey Service
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| Mike Brown wrote: |
Yes, we have 13 technicians available to repair Peavey products dating back to 1965. Believe it or not, quite a few older Peavey units are shipped to us for repair and we are glad to oblige. Our labor rate is $55.00 plus required parts to repair and your return freight costs.
We request that the complete product in question be returned to us for repair with a note of symptoms and a daytime phone number. If you need an estimate, please include that with your product with specific instructions.
Should you have further questions, please let us know. |
Thanks Mike it will be on its way if not tomorrow, the day after.
The VMP2 is the best piece of equipment I own, though not the most expensive. This unit is good for anything a person can run through it. I even run the steel through it in my home studio. It is the only all purpose preamp I can think of.
_________________
Curbside Jimmy's New Act
https://www.youtube.com/watch?v=XlzieFLE5no |
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Mike Brown
From:
Meridian, Mississippi USA
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Posted 10 Jun 2015 5:07 am Vmp2
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| I know, that product was an AMR(Audio Media Research)piece. When we instroduced it and the all tube compressor, every studio in Nashville had one. It is a good product period. |
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James Quackenbush
From:
Pomona, New York, USA
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Posted 18 Jun 2015 2:00 pm
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| They sure make a nice Bass pre also , along with other uses ....One of the best pre's out there ....Jim |
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James Quillian
From:
San Antonio, Texas, USA
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Posted 23 Jun 2015 3:05 pm Re: Peavey Service
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| Mike Brown wrote: |
Yes, we have 13 technicians available to repair Peavey products dating back to 1965. Believe it or not, quite a few older Peavey units are shipped to us for repair and we are glad to oblige. Our labor rate is $55.00 plus required parts to repair and your return freight costs.
We request that the complete product in question be returned to us for repair with a note of symptoms and a daytime phone number. If you need an estimate, please include that with your product with specific instructions.
Should you have further questions, please let us know. |
Does Peavey have a procedure for acknowledging the receipt of equipment? The unit was received by Peavey on June 15.
_________________
Curbside Jimmy's New Act
https://www.youtube.com/watch?v=XlzieFLE5no |
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Mike Brown
From:
Meridian, Mississippi USA
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Posted 24 Jun 2015 7:06 am Peavey Repairs
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Yes, but what most people don't realize is that we receive approximately 100 or so repair items daily, so a UPS, Fedex or USPS tracking number is necessary to validate when a package is received at our repair facility.
To pinpoint where your particular shipment is located when it is enroute to Peavey, log onto that particular shipping site and input the tracking number and enter. If your info is correct, that website should indicate if your package has been received by Peavey, on what date and who signed and received your package at Peavey. If you can obtain this info, you can call anyone in the Customer Service Division at 1-877-732-8391, ext. 1180. |
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James Quillian
From:
San Antonio, Texas, USA
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Posted 29 Jun 2015 6:25 pm
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This all worked real well. The total price turned out to be a lot less than I expected, With parts, the repair came to $111.00. The pre amp has not arrived yet but I am sure it is fine.
I even got some advice about how to keep it from wearing out again.
_________________
Curbside Jimmy's New Act
https://www.youtube.com/watch?v=XlzieFLE5no |
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Mike Brown
From:
Meridian, Mississippi USA
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Posted 30 Jun 2015 7:33 am Peavey Repair
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| I reviewed the service order and the two filter caps and replaced a fuse. fyi. |
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