help - DSL 100 died *updated

[iplayloudly]

so i'm jamming tonight at pretty low volume, and suddenly the sound just fizzed out and died. All was fine for at least an hour beforehand. All lights were still on, and all tubes were light up normally. I checked all the cables, and even put in a spare set of tubes, but still nothing.

Anyone had this problem before? I was just sitting in my computer chair playing when it happened. No cable was stepped on, nothing yanked out of the jack or anything, so I doubt it would be a jack problem. I guess I'll have to take it to a tech...

 

[glpg80]

got a known working preamp tube you can swap around each slot?

did you recently move it from its current location?

did you check impedance settings of the cabinet and the head?

if it has an effects send/return, have you tried bypassing the preamp and sending a direct signal into the effects return to see if you still dont get any sound?

you'll want to try to isolate it for preamp or poweramp or filter related. my guess is that you've had a preamp tube go south. because if it were hardware related and you heard a component go, you would have had alot more going on than just calm idling.

check those first and report back.

 

[killertone]

Check the HT fuse. I am betting it is as easy as that. If the HT fuse goes, the tubes will still light up but it will be as if the amp is in standby mode even when it is in play mode. If the HT fuse did blow chances are you have a bad power tube. Replace the fuse and power tubes and you will be back in biz.

 

[JerryP]

Check the HT fuse. I am betting it is as easy as that. If the HT fuse goes, the tubes will still light up but it will be as if the amp is in standby mode even when it is in play mode. If the HT fuse did blow chances are you have a bad power tube. Replace the fuse and power tubes and you will be back in biz.

+1

 

[iplayloudly]

you guys are awesome. sure enough, blown HT fuse.

I have a spare set of power tubes so I guess I just need a fuse. Any idea where to get one? autozone or something?

 

[JerryP]

Radio Shack

 

[Loudness250]

More likely to score a fuse at Radio Shack or something like that.

 

[jasonP]

Make sure and check the bias after installing new tubes.

 

[JimmyDoomsday]

ace hardware has em cheap (and in larger supply than radio shack) as well.

 

[D-Rock]

Check the 1amp fuse

 

[crankyrayhanky]

That happened to me at song #1 at a gig. I had to take the charity of my buddies Line6 that night- the horror!
I've had a DSL & a TSL, I couldn't keep them out of the shop for the self destructing transformer

 

[iplayloudly]

well guys it didn't help. I got a new fuse and swapped the power tubes (had a spare set). Still no sound.

I did notice something odd though. I accidentally flipped it on without putting it on standby first, and I noticed one of the preamp tubes flashed up real bright and then dimmed down to normal, while the others all looked normal to begin with.

So I tried swapping that one tube with a known-good tube from another amp, but still nothing. I also see that my new fuse has not yet blown. I would think that whatever caused the 1st one to blow would cause the new one to blow right away. Am I right? Any other ideas?

 

[killertone]

Preamp tube flash is fairly normal and does not mean the tube is bad. Try replacing the PI tube, it is the one closest to the power tubes.

 

[Rogue]

I don't know how to diagnose it, but the output tranny has been known to blow because of a grounding fault in the output jack. Try the Marshall amp forum or metro amp forum. They should be able to you out.

 

[D-Rock]

An amp can have more than one fuse in it. Some amps have two that are accessible from the outside of the amp like an SLO. Some have one on the outside, and/or one (or more) on the PCB. Just depends on the amp. If you blow the right fuse, your amp will power up, but it will act like it's on permanent standby.

 

[Rogue]

An amp can have more than one fuse in it. Some amps have two that are accessible from the outside of the amp like an SLO. Some have one on the outside, and/or one (or more) on the PCB. Just depends on the amp. If you blow the right fuse, your amp will power up, but it will act like it's on permanent standby.

You're right. There are some fuses on the mainboard on that amp, I believe. Could be worth checking.

 

[JerryP]

Check the fuse again. Did it blow again? That amp has 2 fuses on the back and more inside.
Jerry

 

[iplayloudly]

I checked every fuse I could find, inside and out. None were blown after changing the blown HT fuse. Everything on the inside appeared to be normal. No burn marks or anything, or loose connections that I could find. But I don't have a ton of experience with the inside of amps so I figured its best to let someone who knows what they're doing look at it.

I ended up taking it to a tech this morning. I guess I'll let you know what happens when I hear from him

 

[D-Rock]

I checked every fuse I could find, inside and out. None were blown after changing the blown HT fuse. Everything on the inside appeared to be normal. No burn marks or anything, or loose connections that I could find. But I don't have a ton of experience with the inside of amps so I figured its best to let someone who knows what they're doing look at it.

I ended up taking it to a tech this morning. I guess I'll let you know what happens when I hear from him

When all else fails, seek professional help