JBL EON 515-XT repair

[lowell]

Not sure EXACLTY which screws, but once I put ALL the pcb screws that mount the pcb to the sink, it worked.

[J M Fahey]

Maybe one of them is also the grounding one.

[drandle]

Ok guys/gals... I have a pair of 515xt's that I bought a year and a half ago. the guy I bought them from took super great care of them and they were like new when I got them. I play in a band that is all acoustic instruments so we don't crank the sound. I've only used these maybe 5 or 6 times in the last year and a half.

Last night we were practicining and I noticed that as soon as I played my bass (with active electronics and eq) it was all distorted through the speakers. Really distorted. I went so far as to plug it right into the input of the speaker and got the same result. one speaker seems to be worse than the other one.

I can't imagine that I've blown the speakers, we don't play in venues that are very big so we never crank it past halfway, and I do have the switch set to music not mic.

I haven't torn into it yet but any help would be appreciated as to how to check if it's the amp or the speaker? How do I tear this thing apart?

Thanks guys/gals!

Don

UPDATE>>> I plugged my passive (fender jazz) bass directly into the input and it was clean. Clean until i cranked up to about halfway and I could hear the distortion start, sounded like a piece of something rattling around the speaker... otherwise it was pretty clean, but I imagine when I crank it with the input from the mixer that it's going to distort bad again....

[Jazz P Bass]

Sounds to me like you have a blown speaker.

[drandle]

Sounds to me like you have a blown speaker.

Crap, I was hoping that wasn't the case, although I thought it probably would be. I took the front off and noticed that when I press the speaker cone it clicks, like it's able to move on it's piston. Not sure if this is normal or not, but that may indeed be indicative of a blown speaker. The date stamped on the speaker is 4/19/2013, so it's not too old. Someone mentioned in a previous post that there's a 5-year warranty on these but would it cover a blown speaker?

[Enzo]

OK, the passive bass sounds clean while the active bass sounds all distorted. How old is the battery in the active bass?

[drandle]

OK, the passive bass sounds clean while the active bass sounds all distorted. How old is the battery in the active bass?

The Passive bass does distort eventually, it just takes a little more gain on the channel. the batteries in the active bass are only a few days old, should be good.

[drandle]

Have any of you tried the drop-in recone kits? Seems pretty simple to do, just wondering what your results were?

[Enzo]

Before deciding on that, make sure. Disconnect the speaker from the amp and drive a different speaker from the amp. Does that speaker also distort?

[drandle]

Before deciding on that, make sure. Disconnect the speaker from the amp and drive a different speaker from the amp. Does that speaker also distort?

Yep, did that after I got home from my gig today. The symptom followed the speaker. the good speaker moves as it should but the blown one is loose and clanks around when you press on the cone....

[Razenby]

If anyone want the JBL EON515XT or the EON315 Repaired then I have really specialise in these. I have done many and have all the kit to do the parametric test and thermal testing. This is service and repair so ALL parts that are stressed or that cause common failures are replaced. 4 day turn around. Bases near reading. Cheers,

[ojov]

help

Hi, I am currently trying to resurrect a JBL 515 that does not start any more (no light - no sound)
I have replaced Q370-Q373 and U604-u607 for new ones

I want to do the same for Q605 and Q606 (GBT, 20A 600V TRENCH W/DIODE) but I am not sure what item to choose.
Would someone help me and find the right item at Farnell ?

Thank you

Olivier