VH4 tube layout

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AC

AC

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I recently bought a second hand VH4, probably a 2009.

Last week I noticed that the midi-switching doesn't respond as it should anymore. I can go to channel 1 without a problem, but when I select one of the other 3 channels, it goes to that channel, but I can't change it to another one of those 3 channels.

Today, when I lit it up, I saw that one of the tube fault indicators was turned blue, under tube 3.

Now, I've searched for the tube layout, if tube 3 would happen to have something to do with the midi-switching, but it's not in the manual (http://www.diezel.ch/en/products/pdf/vh ... nglish.pdf)

The manual also states that with a faulty tube, the led should be red, not blue. Did that change?


So...
Do I have 1 problem or 2?
Because my tube-tech is not midi-minded...
 
He did.


So actually, 2 problems.

Problem one is already solved. Now waiting for part 2.
 
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