Mark V briefly loses power, then comes right back on?

Discussion for the new Mark V

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tele_jas
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Re: Mark V briefly loses power, then comes right back on?

Post by tele_jas » Wed Nov 25, 2015 7:25 pm

Spoke to Mesa today. They walked me through a few basic things and asked a few questions and got the SN to my amp. He informed me that my amp is still under warranty and so I'm shipping it back in on Friday (after the holiday) to be repaired at no charge (other than shipping it in to them).

I've dealt with several amp makers in the past, Mesa and Dr. Z (and maybe one other boutique maker) are the absolute BEST at customer service. Many companies, large and small, need to follow Mesa's lead in this. Make a good product and stand behind it!

I'll report back in 3-4 weeks on their findings, but they suspect some resistors in the power supply or transformer are going bad.
Dr. Z Maz Jr Mk.II * Dr. Z Stingray * Mesa TA30 * Some Telecasters ** EVH * Wolfgang * Bunch-O-Pedals!

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tele_jas
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Re: Mark V briefly loses power, then comes right back on?

Post by tele_jas » Fri Dec 18, 2015 8:21 am

**UPDATE**

Sent my amp in to Mesa a few weeks ago, they called me Wednesday with an update:

Said they put it "through the paces" and could not get it to replicate the issue I was having.... But, there were some components in the power section that they upgraded/replaced, and they tested and re-tensioned the footswitch jack and another jack (or a few).

He said they tested it for a while after all this and it did not cut out on them, so they are sending it back to me with a detailed repair sheet.

Mesa CS is great and I can't wait to get it back, but it does make me a little nervous that they never could replicate the issue in-house and I got it quite often. Hopefully the power section update fixed it?

I'll keep ya'll posted
Dr. Z Maz Jr Mk.II * Dr. Z Stingray * Mesa TA30 * Some Telecasters ** EVH * Wolfgang * Bunch-O-Pedals!

Giz-Tone
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Re: Mark V briefly loses power, then comes right back on?

Post by Giz-Tone » Fri Dec 18, 2015 5:08 pm

I'm not surprised; the damn thing happens so sporadically. My amp cut out once since I last posted, the one time I wasn't watching the tubes like a hawk. Typical. I'm glad your amp is on its way home to you.

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Re: Mark V briefly loses power, then comes right back on?

Post by Giz-Tone » Wed Jan 13, 2016 1:18 pm

Has your amp returned to you? Any issues since if it has?

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tele_jas
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Re: Mark V briefly loses power, then comes right back on?

Post by tele_jas » Wed Jan 13, 2016 1:49 pm

Giz-Tone wrote:Has your amp returned to you? Any issues since if it has?
Yes, I got it last week!

I replied to a post on TGP, I thought I replied here too but I guess I didn't....Sorry.

Yes, got it and have played it several times and have not had any issues..... I think they fixed it.

They called me right after Christmas and said the replaced some components in the power supply/transformer and re-tensioned my footswitch pin connections. I'm keeping my fingers crossed, but it appears to be fixed.

I'm playing a show this Saturday and gonna use my Mark V, that will be the true test :P
Dr. Z Maz Jr Mk.II * Dr. Z Stingray * Mesa TA30 * Some Telecasters ** EVH * Wolfgang * Bunch-O-Pedals!

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Re: Mark V briefly loses power, then comes right back on?

Post by bandit2013 » Sun Jan 17, 2016 6:46 am

It is good to hear you may have a resolve on your issue. Did you send the amp with the power tubes installed or did you remove them when you shipped it for repair?

I have had other issues with my Mark V but nothing like what you have experienced. I did have a similar problem but was related to rectifier tube and power tubes and eventually a screen resistor. I have not had any issues since the repair.

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Re: Mark V briefly loses power, then comes right back on?

Post by tele_jas » Sun Jan 17, 2016 2:29 pm

bandit2013 wrote:It is good to hear you may have a resolve on your issue. Did you send the amp with the power tubes installed or did you remove them when you shipped it for repair?
I had the option of sending the tubes to have them tested as well, or just the chassis without the tubes. I did send my tubes in and they all tested fine...... It was my power supply with the additional possibility of something in the footswitch jack causing issues. But more than likely, the power supply.

I played a 4 hour show last night, plus sound check and a quick practice pre-show... A total of almost 5 1/2 hours and it did not give me any problems.
Dr. Z Maz Jr Mk.II * Dr. Z Stingray * Mesa TA30 * Some Telecasters ** EVH * Wolfgang * Bunch-O-Pedals!

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Re: Mark V briefly loses power, then comes right back on?

Post by kreatorkills » Sat Feb 06, 2016 12:16 am

I had the same problem last year but it only happened once, and right after the power came back on the rectifier tube started smoking and then died. I took it to an authorized repair guy and he checked the amp out completely and replaced the rectifier tube. The amp had no problems that he could find and since replacing the rectifier tube i have had no further problems.
So if you haven't already, try replacing the rectifier tube.
Good luck.
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tele_jas
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Re: Mark V briefly loses power, then comes right back on?

Post by tele_jas » Sat Feb 06, 2016 2:14 am

kreatorkills wrote:I had the same problem last year but it only happened once, and right after the power came back on the rectifier tube started smoking and then died. I took it to an authorized repair guy and he checked the amp out completely and replaced the rectifier tube. The amp had no problems that he could find and since replacing the rectifier tube i have had no further problems.
So if you haven't already, try replacing the rectifier tube.
Good luck.
I already sent it in and got it back right after Christmas.... They found some bad components in the power transformer and some issues with the footswitch jack and re-tensioned the input.

I did replace the rectifier tube prior to sending it in, no fix.
Dr. Z Maz Jr Mk.II * Dr. Z Stingray * Mesa TA30 * Some Telecasters ** EVH * Wolfgang * Bunch-O-Pedals!

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Re: Mark V briefly loses power, then comes right back on?

Post by jaslan » Fri May 06, 2016 10:55 am

I started experiencing this a few months ago. My amp is about 6 months old. It would happen once or maybe twice a day playing 2-4 hours per day or, sometimes not at all for several days. At first, it was very quick and i wasnt even sure what was happening. Then, once it went off for about 2 seconds and when it came back, the channel had reset to channel 1 and all 3 channel footswitch lights were on (like i had just turned on the power from a cold start up). This is when i started to suspect power problems. I talked to support and they said i may be experiencing low voltage in my house. So i tried to keep an eye on that (i have a rack mount power strip with a voltage readout but the amp was plugged directly into the wall per supports recommendation). It continued to cut out occasionally and then, the other day, it cut out and reset to channel 1. There were no lights on the front panel of the head or footswitch and the sound faded out over the 15 seconds or so. Now the amp wont come on at all. I can see when the power switch is on, that the power tube filaments are getting power and glowing orange but no sound or lights anywhere on the amp or footswitch.
I talked to support again and they seemed fairly certain of low voltage condition at my location and he did mention that they have been seeing this problem. He said there is a "tech order" update that replaces some components in the power supply that should fix the problem by making it less sensitive to momentary low voltage conditions (or at least that was my understanding).
I contacted the nearest repair shop and he ordered the components and once he gets them i will take the head in and he said it should only take an hour or two. I am hoping that fixes everything and will post the results here.
I live a a town of about 45,000 people in an area with plenty of new development and our house is less than 20 years old and i have never had any trouble so far in our 8 years of living here with appliances or my old amp, etc. i am hoping the diagnosis is correct and it just needs a more robust power supply. I guess if that doesnt do it i may have to look into a voltage regulator.

Anyway, back to Guitar Rig for, hopefully, only a week or two... :oops:

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Re: Mark V briefly loses power, then comes right back on?

Post by jaslan » Thu May 12, 2016 8:01 pm

I got my amp fixed. I was fortunate enough to have a qualified repairman within driving distance from my home. He was very accomodating (New Orleans repair location) and allowed me to coordinate bringing in the amp at a time when he was able to work on it immediately. In fact, he let me stay and watch and actually taught me some things about handling the tubes and taking the chassis out in case I ever need to send it somewhere, etc.
Anyway, when we plugged in the amp at his shop, it was still "dead" with no lights on the front panel at all but the tubes were getting power as indicated by the orange glowing "filaments". There are 4 diodes that the support tech had instructed him to replace with new ones that they sent to him. Before removing the old ones he tested them and 2 of them did, in fact, fail the test. After replacing all four diodes and putting the tubes back in, the amp powered up and worked flawlessly. We tested all the channels, etc. I have had the amp back at home for four days now and have put about 6 hours on it and have not had any "cutouts" so far. Mesa support was right on with the diagnosis and the fix.

In total, my amp was only out of commission for six days. The repair tech had the parts in hand the day AFTER in called support. The extra couple of days was actually my waiting for a day I was able to take it in.

Anyway, incredible support from Mesa and the repairman!

I hope this post helps someone. :P

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tele_jas
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Re: Mark V briefly loses power, then comes right back on?

Post by tele_jas » Thu May 12, 2016 9:26 pm

Awesome, thanks for the update!

There's nothing worse than having a dead, expensive, amp! Luckily, it was an easy fix (for both of us)
Dr. Z Maz Jr Mk.II * Dr. Z Stingray * Mesa TA30 * Some Telecasters ** EVH * Wolfgang * Bunch-O-Pedals!

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Re: Mark V briefly loses power, then comes right back on?

Post by bandit2013 » Sat May 14, 2016 8:02 am

I will buy that..... It is good to see there is a resolve to your issues......

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Re: Mark V briefly loses power, then comes right back on?

Post by Rocco Siffredi » Sat May 14, 2016 1:41 pm

jaslan wrote:I got my amp fixed. I was fortunate enough to have a qualified repairman within driving distance from my home. He was very accomodating (New Orleans repair location) and allowed me to coordinate bringing in the amp at a time when he was able to work on it immediately. In fact, he let me stay and watch and actually taught me some things about handling the tubes and taking the chassis out in case I ever need to send it somewhere, etc.
Anyway, when we plugged in the amp at his shop, it was still "dead" with no lights on the front panel at all but the tubes were getting power as indicated by the orange glowing "filaments". There are 4 diodes that the support tech had instructed him to replace with new ones that they sent to him. Before removing the old ones he tested them and 2 of them did, in fact, fail the test. After replacing all four diodes and putting the tubes back in, the amp powered up and worked flawlessly. We tested all the channels, etc. I have had the amp back at home for four days now and have put about 6 hours on it and have not had any "cutouts" so far. Mesa support was right on with the diagnosis and the fix.

In total, my amp was only out of commission for six days. The repair tech had the parts in hand the day AFTER in called support. The extra couple of days was actually my waiting for a day I was able to take it in.

Anyway, incredible support from Mesa and the repairman!

I hope this post helps someone. :P
Thanks! My Mark V is having this exact same issue.

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Re: Mark V briefly loses power, then comes right back on?

Post by tele_jas » Sat May 14, 2016 1:58 pm

Rocco Siffredi wrote:Thanks! My Mark V is having this exact same issue.
Give Mesa a call...Or have your tech call them. When I spoke to them, they said there were several from a few years ago that they have narrowed it down to the components they got from their supplier (or something like that), but they know which SN's have these parts and replacing them will fix the issue.
Dr. Z Maz Jr Mk.II * Dr. Z Stingray * Mesa TA30 * Some Telecasters ** EVH * Wolfgang * Bunch-O-Pedals!

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