psarkissian

First off, do not use camcorder batteries in the JTV's, they are not as compatible as you may have been lead to believe.

The JTV Line 6 battery is getting old and spent, and is not charging the way it should. 98-034-0003 is an older part number

on the battery, whereas 98-034-0009 is the current number.

Or, a failed solder point on the battery box circuit sending a false low volt signal to the main board. The JTV-59, battery

and charger should be checked out at the nearest Line 6 authorized service center.

Use Workbench HD.

Same board as JTV, but with a different program. Both use Workbench HD.

You can do a re-Flashing of the Firmware,... v3.01 as I recall.

Then you will know for certain whether it is hardware or software.

But most probable is hardware.

600 has a lacquered finish maple fret board, not an unfinished rosewood fret board and made in Korea.

That one is made in Indonesia.

600 has a lacquer back of the neck, this one doesn't, so it has to be a 300.

I have two 600's here in the lab with lacquered back of the necks.

They can be hard to tell apart.

Could be intermittent slide pot, intermittent cable connect to circuit board or jack plate circuit header.

Maybe a program glitch or other intermittent issue with the main board.

Not a 500, they don't have a tremolo bridge and the 500 bridge is a fixed on-the-deck bridge.

The 600 has a lacquer back of the neck,... so it has to be a 300 Electric. Nice.

Saw the photos from the the support ticket from back in May, as the Support people consulted me about that.

Trying to repair trace damage like won't last. And two IC's near that spot may be damaged as well, one of which,

sorry to say, is an out of date IC no longer made or available.

Not if it's the 500 electric program board.

Continuing on the posting in the early Variax topics.

All of my Line 6 gear plays nice with my third party gear.

No schematics available. Too much proprietary stuff in it.

No schematics available. Too much proprietary stuff in it.

The way the strings are on a 500 Electric, the  ends won't fall onto the circuit.

That can happen with a JTV-69 though.

AES is the protocol. What they do with it,... even I don't have that info.

Not something I typically deal with on those.

Use the tubes (valves) specified and matched sets, as specified in the post on tubes.

Remember,... these are not all analog tube amps, so the digital and analog sides have to talk nice to each other.

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.

If the power amp board failed, then it will need to go to an authorized service center

for a proper troubleshoot and repair.

It might be time to replace the power tubes (valves). When was the last time that was done?

If it isn't published in Line 6 literature, then it is not out there.

Log a support with them for those particulars. If It is related to the service bulletin, then it would be warranty.

If it is something else, then it won't be. They would have to troubleshoot on their repair bench to determine that.

Use Firefox or Chrome.

Also, if there's a problem with the headphone jack, like a short, it will put the output amp into "Mute" mode.

Rare, but it can happen.

I was hoping that if it went to E&M in Milton Keynes, Bletchley, that it might come up as a warranty repair if a service bulletin was involved.

Your serial suggests it might be,... might be, a possibility. It's why I was hoping they would evaluate it. That would not occur at a non authorized service.

:)

Used to be a couple between Homestead and Jupiter. One might have retired, he was older than me.

hmmm,...

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.

"... 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.