Hi
I'm having an issue with my Mark and hoping to see if someone might be able to shed some light on what the causes / fixes might be.
The issue is that on Channel 3 there is no output.
Just for a bit of background and process of elimination...
Channel 1 and 2 work fine. My understanding is that power tube issues would result in all output issues with all channels, so suggesting this is not an issue with power tubes.
Can't be an issue with Rectifier tube as Channel 3 doesn't offer tube rectification. I've tried switching between pentod and triode which had no impact.
Since powertubes didn't seem to be the cause, I've replaced the tubes (one by one) that are isolated to Channel 3 (v4 to v7) and still no output. Have tried switching every option on channel 3 (modes / reverb / EQ / Preset EQ / wattage / Bright etc) with no success.
I've resigned myself to the fact that this will need to go to a tech to resolve. Unfortunately the only tech in my state doesn't work on weekends so would need to take a day off just to take it in and wanting to prep myself for what the possible causes might be and how expensive an issue this might be.
Any ideas what might be causing this?
Has anyone come across this issue before?
Is there anything else I can try before taking it to a tech?
Thanks in advance for any help, thoughts or suggestions are much appreciated.
Cheers
I'm having an issue with my Mark and hoping to see if someone might be able to shed some light on what the causes / fixes might be.
The issue is that on Channel 3 there is no output.
Just for a bit of background and process of elimination...
Channel 1 and 2 work fine. My understanding is that power tube issues would result in all output issues with all channels, so suggesting this is not an issue with power tubes.
Can't be an issue with Rectifier tube as Channel 3 doesn't offer tube rectification. I've tried switching between pentod and triode which had no impact.
Since powertubes didn't seem to be the cause, I've replaced the tubes (one by one) that are isolated to Channel 3 (v4 to v7) and still no output. Have tried switching every option on channel 3 (modes / reverb / EQ / Preset EQ / wattage / Bright etc) with no success.
I've resigned myself to the fact that this will need to go to a tech to resolve. Unfortunately the only tech in my state doesn't work on weekends so would need to take a day off just to take it in and wanting to prep myself for what the possible causes might be and how expensive an issue this might be.
Any ideas what might be causing this?
Has anyone come across this issue before?
Is there anything else I can try before taking it to a tech?
Thanks in advance for any help, thoughts or suggestions are much appreciated.
Cheers