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psarkissian

Service Engineer Moderator
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Posts posted by psarkissian

  1. Relay? Possible, but rare. Unequal topology is usually old tube (valve) elements wearing and

    pulling down voltage of signal path in the tube (valve) amp section.

     

    Also, be aware that topologies are not amplitude normalized between them, and that amp Class

    setting is also involved in how the gain loop topologies work.

     

    Schematics are not available due to intellectual property considerations, and we cannot vouch

    for the technical ability of others out there. Being high voltage tube amps, it is also a safety issue.

    I've been dealing with vacuum tubes and CRT's for 50+ years,... I still get zapped every now and then.

    It still hurts when that happens. So another reason we don't publish schematics.

     

    HD500 thru the Line 6 Link,... yes. I haven't tried that lately. As I recall, what comes out of the HD500

    comes out of the L6 Link as well, fed by the same source path.

     

  2. Yes, especially with the tube (valve) amps, as those are very high voltages. They tell me they have experience.

    I have 50+ years of it with tubes (Valves) and everything else, and I still slip and get zapped. It still hurts when I do that.

     

    Sending in just the head,... sometimes, depends on the problem. Something to work out with Support, us techs

    here and/or the authorized service center. And always get a return authorization (RMA) before sending it here.

     

    In some cases, servicing is a parts issue, as some parts are no longer available. Check the list for limited servicing

    in the Knowledge Base for that info.

     

  3. "... to an inherent fault." - I don't think it's an inherent fault, but there are a couple things to go over with the service tech to check.

    "... people closer to me who can change components on any P.C.B. ... " - They won't have access to service info or me.

    Your serial number number suggests it's an amp from 2008 or 2009.

     

    spydox,... unfortunately not everyone out there is as tech as you or I. Too many have tried self repairs on their own and have had poor results.

    Then it ends up on bench and ends up taking more time and money to get the job done than it would to use an authorized tech. I see this all to too often.

     

    "... we really lack is proprietary service manuals which many companies offer to the public. " - there are still intellectual property considerations,

    and we don't know, nor can we vouch for the ability of others to know what they are doing, when it comes to self repair. I see failed attempts come

    across my repair bench all to too often. Trying to prevent that, so people can spend their time making music and rocking and rolling.

     

    Proprietary service manuals offered to the public is, by definition, no longer proprietary. And usually when they are no longer proprietary

    do they do that. Not everything in these products are hardware. A lot of it is programming. 

     

  4. Could be several things. It needs to be taken in and checked out by an authorized service tech.

    It will not be a self repair sort of thing you can do. They would need to do it. If they need to, they

    can consult me further about it through our technician email channel if they want.

     

    Where in the UK are you? Is there a Virgin Express train to Milton Keynes where you are at?

     

     

  5. Chime, layer2, toggle-1 is my goto for a Ricki 370-12. I'm the de facto Ricki nut at Line 6 when it comes to 4001 or 370-12.  :)

     

    Shop the web site, there are B-Stock/ Re-furbs that have been across my bench and serviced before going on the site's shop.

    Looks a bit thin right now, try back there next week. I've sent some to the distribution hub recently.

    https://shop-us.line6.com/hardware/guitars/

     

     

  6. 1- Intellectual Property rights issues. They are very protective of that here. So I would not want to

    see anyone get in trouble over that.

     

    2- Even if you could, the program IC would be blank, so the board would not do anything. And no,

    can't use Monkey for that. Monkey just load and updates models, does not have the core program.

    So Monkey would not be useful for that. Getting that program,.... well, see #1.

     

    3- If such a guitar with this board in it were to come across my repair bench or bench of an authorized

    service center, it would be returned untouched, as a product with an unsupported modification.

     

     

    Mr Legler being in the EU, Full Compass won't do, maybe an equivalent supplier over there. Or as I

    mentioned before, get a used one to pull parts from, that has a good program board in it

     

    Hope you find it,... fröhliche Jagd.

     

     

  7. Tunings have to be part of the custom patch you create and name, so when you do an Upload All,

    everything uploads with it, including the Alt Tune strings. As far as I know, there is no way to do a

    Global Alt Tune. That would need a virtual Alt Tune knob for that. So, Alt Tunes are done as part of

    each custom patch. 

     

    What is the Flash version you have in your JTV?

     

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