psarkissian

Metal covers can mess with the magnetic field of the pole pieces,... just so you are aware.

Might have to special order that from Full Compass, or take it to a Line 6 authorized service center and have them install it. https://line6.com/find/service_center/ Or, register your guitar in your Line 6 account, get with Customer support again, and see about sending it to me here at Line 6.

Technically, it's an encoder. If It is doing that, it should checked out by a Line 6 authorized service center. https://line6.com/find/service_center/

How old are the Tubes? What brand and tube number are they (power and pre-amp tubes)?

Brand and tube number of the matched set? If not the power tubes, maybe the 12AX7 pre-amp tubes.

james589batson,... "If anyone has tested it, feedback would be helpful before trying it yourself!" --- Review my above post. I am the person at YGGI/Line 6 who services and repairs JTV, Standard and Shuriken guitars since 2010 (done close to 3,000 by now), and guitar with and without active circuitry on and off for decades before that. I've seen these battery foul ups and failures first hand,... to the guitars, the batteries and the chargers. Been getting paid to do this tech stuff for some 50 years now, and doing it in general for the heck of it since I was 11 or 12. Pretty much seen it all. Correct battery with the correct specifications, charge/discharge rates,...correctly matched components in general is a must. Hence my above recommendations. Don't want to see any of you blow your gear and as a result, have it end up on my repair bench or an authorized service center needlessly.

Flextone discrepancies,... could be differences in revisions. There were heads as well as combos. Also, there may not be third party schematics for third party modules or sections, as they would not be ours to have or display.

Cost? Not off hand. I would have to evaluate it and check it out, see what's going on with it, and give an estimate. The Customer Support people would add it up and quote an estimate. Any time,... that's what I'm here for.

Could be the jack plate, interface or main board. No techs that do guitars,... hmmm. Log a Support ticket in your account and they will let you know what the options are. They may suggest sending it back me for service.

With the JTV-69, I don't see a service record for that. I figure it has never been serviced, so it more than likely has and earlier revision main board in it. Current version board has a couple of updated chips that are more current for today's data stream rates. The 89F would have the current version board in it. the 69 is a 2012 build, the 89F is from 2016. It should be checked out by a Line 6 authorized technician near you. It is won't be something you can self repair.

With a cotton swab, drip in isopropyl alcohol or contact cleaner onto the piezo. Let in work its way into the saddle. The blow it out with canned air. Repeat as needed. If that doesn't do it, take it to a Line 6 authorized service center to have it checked out. Could be a failing piezo or solder point. Have an service tech experienced with this product deal with it.

Used to work at JBL/UREI, so Soundcraft was down the hall from us, very cool mixer boards and consoles. Was an ADAT service tech at Alesis, doing all the ADAT variants, my specialty was the M20, along with the 12R and Studio 32 mixers. Was going to be one of two A6 Andromeda synth techs and was going to be the main tech for the HD24,... then the whole breakdown occurred and Numark bought them. Interesting times. Central might not be backwards compatible enough for the 500 for some reason. Glad you manged to get another one.

Just "OS X",...typically refers to OS prior to the animal named OS's. Monkey has been backwards compatible until recently, when it all went to Line 6 Central. My last Mac Lap compatible with original Variax was OS 10.6.8 (whatever animal that was). Monkey still worked until recently on my OS 15.4 Sonoma, but I can no longer connect to any original Variaxes except to check Firmware version and can no longer do updates.. With many parts no longer available or made anymore, some people are getting used one as a source for parts. Also check out https://line6.com/support/ as some info have become available. https://line6.com/technical-schematics/ Just became available recently, for Legacy products, for those with technical prowess and skills. Some IC chips are no longer available or made anymore, being an almost 20 year old product and all. And as usual, attempt at own risk.

For 700 Electric, I see zero at this time. Inquire here again in early July, I can check again.

"... Googling that gave me a post from you in 2017 that said 'with that error code',... the main board needs to be replaced by an authorized service center. "--- That was for a JTV's with Flash v1.82, as there was glitch in the program. You had to roll back and then update to a Flash version beyond v1.82 or risk freezing the board beyond repair. That does not apply to original Variax, such as 500 Electric. On the Downloads page, it looks like Snow Leopard is too current an OS.