Mark v90 possible bad relay?

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Drexter
Bottle Rocket
Posts: 3
Joined: Thu Aug 29, 2019 11:21 pm

Mark v90 possible bad relay?

Post by Drexter » Thu Aug 29, 2019 11:40 pm

Hello everyone I used to be member of this group a long time ago weird thing is user didn’t worked so anyway... this thing has been happening for a while now,
Every time i play in 45w mode i hear a relay sound, thing is nothing really happens, just sounds as if i were changing channels but not doing it nor anything happening, now heres what im mentioning this, the real problem i get is, sometimes when i do change in footswitch from channel 3 to 1, channel one shuts of, then only if you play hard it will work again, that or just changing from any channel and back again, so does this have been a problem to any of you guys or do you have any idea were i should look for?

Already troubleshooted
Cables
tubes all of them including recto
Diode or tube
All watt modes
All channel modes
Loop active or not
Pentode or triode
Footswitch and external footswitch
Guitar
Variac or full power
Here a link to video
https://youtu.be/l9IvaEv5S7w
Thanks

Giz-Tone
Mark I
Posts: 43
Joined: Fri Jan 24, 2014 2:31 pm

Re: Mark v90 possible bad relay?

Post by Giz-Tone » Fri Aug 30, 2019 1:08 pm

I remember a post similar to this. The amp was making a sound like the channels were switching. It turned out to be a problem with the lead for the foot switch.

Giz-Tone
Mark I
Posts: 43
Joined: Fri Jan 24, 2014 2:31 pm

Re: Mark v90 possible bad relay?

Post by Giz-Tone » Fri Aug 30, 2019 1:12 pm


Drexter
Bottle Rocket
Posts: 3
Joined: Thu Aug 29, 2019 11:21 pm

Re: Mark v90 possible bad relay?

Post by Drexter » Fri Aug 30, 2019 1:56 pm

Thanks for the reply , as I stated before footswitch already being troubleshooted, problem persist using external switching directly to the channel as using any midi cable or diferent footswitch, also most notably happen when amp is not used frequently

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jb's 52
Mark IV
Posts: 544
Joined: Tue Mar 16, 2010 11:19 am
Location: west coast

Re: Mark v90 possible bad relay?

Post by jb's 52 » Fri Sep 06, 2019 11:41 am

I had the same issue seen here (with and without bypass):
https://youtu.be/-41mAFh-xDk
https://youtu.be/wtQrx93XwjA

I had to send it to Mesa for repair.
Repair notes state:

"Replaced relays RYC3E and RYC1C. They are in series between 3rd and 4th CH1 stagers. 1 of the[m] was hanging / sticking"
♫♫♫♫


Union Down

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danyeo1
Mark IV
Posts: 757
Joined: Tue Dec 13, 2005 12:05 am
Location: Central NJ

Re: Mark v90 possible bad relay?

Post by danyeo1 » Wed Oct 09, 2019 10:30 pm

Same problem with mine. I switch to channel one and nothing, but if I smack the strings I will get sound after a few seconds. No issues with channels 2 and 3.
MarkIIC+,III, IV and V, ED clips here.

http://soundcloud.com/danieldowning

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