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psarkissian

Service Engineer Moderator
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Everything posted by psarkissian

  1. psarkissian
    "Is the part circled a connector or is it permanently affixed to the battery holder?"--- That connector is soldered in to the battery holder circuit board. That is a JTV-59,... battery holder swaps should be done by a Line 6 authorized technician who knows the product, as getting the battery harness wires through the cavity require removing the main board so you can get the cables through the hole. So go with a Line 6 authorized tech on this one. If it were a JTV-69 or JTV-89F, I wouldn't be concern. 59 is different. Going about it from the battery holder circuit board side of it is ill advised. A wrong move, connector or circuit trace damage on the old or new circuit board or cable connector, and you'll have to start over. Static discharge into the program IC on the battery circuit board, the program might get wiped, and you'll have to start over. Static discharge while trying to remove the main board, the program might get wiped, and you'll have to start over,... and with a new main board. Best to leave this one to a Line 6 authorized tech in your area, who has the right tools and experience for this.
  2. psarkissian
    Correct biasing needs to be done. These are not the all analog amps of old. Can't get away with the same sort of tube swapping over over/under biasing like in the 1960's and 70's. Take it to a Line 6 authorized service tech for that.
  3. psarkissian
    Do mess with the board, too many things can go wrong. Full Compass should have the whole battery box. That of course assumes that it is where your problem is.
  4. psarkissian
    Would have to be evaluated by our tech here. He has a set-up for doing circuit boards on that level. Black box display is one of his specialties. If it can be fixed, he can do it. There no more replacement boards for that. As per my prior post, register the amp in your account, then log a Support Ticket, they will let you know what your options are.
  5. psarkissian
    Register the amp in your account, then log a Support Ticket, they will let you know what your options are. If they have you send it in, it should be put into an "anti-static bag" for electronics, then shipped as recommended by the support person before sending it in.
  6. psarkissian
    Old Workbench is available for PC up to Windows 8, and Mac up to 10.8 Mountain Lion. When updating, a message comes up asking if you want to save patches. Unfortunately, it's just the patches and not the Alt Tunes. If the patch itself has a different tuning other than standard tuning, that would be saved as part of the patch.
  7. psarkissian
    MIDI is mainly for firmware updating and some MIDI CC functions. For anything beyond that, check the user manual MIDI chart,... https://line6.com/data/6/0a060b316ac34f0593546810e/application/pdf/MIDI Continuous Controller Reference - English ( Rev F ).pdf
  8. psarkissian
    With tubes, the characteristic curve and the way it's loaded is a big deal, especially in a hybrid amp with both analog and digital sections that need to function together. So don't try to mod these things. It's not like the old days with all analog amps, when you could tube swap at will. Those days are gone here.
  9. psarkissian
    Yes. It does cause problems with internal circuitry if let go for too long. Have had several on my bench in the past.
  10. psarkissian
    Looking at the serial number of the unit. Tubes have to be changed out periodically. If they are old, there could be a voltage pull down on the supply line. If a tube swap was done and they are not the specified tubes for the product or biased incorrectly, other problems will occur. Read my post on this subject here,...
  11. psarkissian
    Not my opinion, my experience and being an old guy who's been dealing with tubes a long time. Dealt with Spider Valve from its beginning. Dealing with tube gear in general since I was a teen. Have the 5881WXT match quartet installed and biased by a Line 6 authorized service center with the correct info. 12AX7B China or 12AX7EH is fine.
  12. psarkissian
    Mark,... It has to do with the subtle differences in the characteristic curves of the afore mentioned non-specified tubes. The program board does not like those differences, and the analog portion doesn't like the digital sections response. So it is imperative that the specified tubes are used.
  13. psarkissian
    Power tubes should be Sovtek 5881WXT, not Ruby 6L6. The standard spec biasing won't work with these tubes in this amp. The characteristic curves are close, but not close enough, so using our standard biasing will throw things off. These aren't the all analog amps of the 1960's, the digital board and analog sections need to talk to play nice with each other, not using specified parts has an affect. Check my post here on this subject,....
  14. psarkissian
    weedsy,... Afraid that is the case. There is no portability of original model patches to the HD world. Once you update to v2.00 or higher, the old patches won't work. Save the old Workbench to an archive medium, back-ups for the back-ups, as a general rule of thumb.
  15. psarkissian
    If it's coming up as a 59 in Workbench, then it's a programming issue in the board. Try using original Workbench, the 89 wasn't meant for HD, the 89F is. Use original Workbench. If that doesn't fix it,.... Not something you can fix yourself. 1) send it back, 2) take it to a Line6 authorized service center, 3) log a ticket with Customer Support to have it sent to me. At that point,... either a board swap out or I re-program it. It's a part of the program that is not user accessible. Afraid that re-Flash won't help in that case.
  16. psarkissian
    "Unfortunately, it sounds like you would need to bring it to an authorize service center for evaluation."--- Yes. Not a user self repair situation.
  17. psarkissian
    Yes,... what seldon1 said. How long has it been since the tubes (valves) were changed out?
  18. psarkissian
    1) What are the brand and numbers of the tubes? 2) Are the speakers connected to the correct outputs for the speakers being used? They have to be impedance matched. 3) Are you using proper speaker cable and not guitar cable to connect the speakers? That also goes to impedance matching issues.
  19. psarkissian
    Sounds like a hardware issue. It is not a self repairable problem. It will need to be serviced by a Line 6 authorized service center.
  20. psarkissian
    No Variax inputs on Bean PODs, just the floor POD's (except the HD300).
  21. psarkissian
    JTV-69, the latest would be Flash v2.22 program. Updates of the same Models. Using Workbench HD, you can create your own or adjust what there already is to how you like it.
  22. psarkissian
    Make certain the product is registered, then log a support ticket. They will let you know what the options are.
  23. psarkissian
    The section on Workbench interface,... Workbench Interface Q: How do I get the Variax Workbench interface to recognize the James Tyler Variax guitar? A: First, ensure that you have downloaded and installed the latest drivers for the Workbench interface from the Line 6 Downloads page. Then, ensure that the battery of the James Tyler Variax is charged and inserted into the guitar. Connect the Variax Workbench interface to the computer via USB, and also connect the James Tyler Variax guitar to the Workbench interface via the included VDI/Network cable. Lastly, connect a 1/4" cable into the guitar's output jack to power on the guitar (as the Workbench interface DOES NOT provide power to the guitar, this 'dummy' plug is necessary for the interface to recognize the JTV). The other end of the 1/4" cable does not need to be plugged into anything. You should see 2 green lights on the Workbench interface when everything is connected and being recognized properly.
  24. psarkissian
    Go with a tech who knows the insides of these.
  25. psarkissian
    jerseyboy,.... right. Could be as simple as a loose connection. Or as bad as the battery box, main board and jack plate circuit damage because of too much current being pulled because of trying to run both 1/4" and VDI together, or not using a TRS end guitar cable. Won't know for certain until it's on the repair bench and properly gone through and evaluated.
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