Peavey TNT 115 disassembly??

[The Ancient One]

I was gifted a Peavey TNT 115. It was in storage, is very dust. It works but the pots are scratchy. I want to pull it apart and clean it. But I'm stumped and could use some advice. (amp has been sitting 2 weeks so should be discharged??)

I removed the 4 screws in the top and the 4 screws from the back shelf. The amp is free but will not come come out the front or back, seems to hang up after a few inches. There is slack in the speaker wire.
Does the speaker need to be disconnected?

If someone could provide the steps I'd be most grateful!

I'm fully aware of step 1, take it to a tech, which I have happily ignored. It's just too damn heavy to move again.

 

[The Ancient One]

Should have included asking about the speaker grill? Is it held by Velcro? As always help appreciated.

 

[basscooker]

Depending on its year, yes to both, IIRC.
The speaker is wired out the bottom of the chassis and is probably what is "hanging it up". The wires are likely spade connectors and will fit through a hole in top of the enclosure, then through a grommet in the bottom of the chassis.
The grill is attached with a velcro-like mating system.

 

[agedhorse]

If you are going to do it yourself, here are43 bits of information to help you avoid damaging your amp beyond economical repair.

1. Use only Caig DeOxit D-5

2. Use only the tiniest amount possible

3. Spray into the a lot that the terminals exit from and never through the bushing

4. Don’t let it get anywhere else.!

 

[lowplaces]

If someone could provide the steps I'd be most grateful!

I'd try the handle screws.

 

[basscooker]

^^^^^
Ooo yes I forgot that part! They DID do that too sometimes

 

[The Ancient One]

THX.

 

[lowplaces]

THX.

Let us know how it goes .

 

[Al Kraft]

Should have included asking about the speaker grill? Is it held by Velcro? As always help appreciated.

Many Peavy grilles of that era (and prior) had a "velcro inspired" kind of attachment in all for corners. The trick is that it wasn't velcro but a number of small hard "little plastic sticks" that interlock much more strongly than velcro. If you don't see any screws holding the grill on you may have this type of attaching system.

You need to try and pull it straight apart at the corners and push it straight back together. I just repaired a friend's Bass Combo 300 Mark III last week where someone couldn't get the grill on properly and decided drywall screws were a better solution. All that was needed was to line up the matching patches with the "little plastic sticks" on them and push them straight together. You will hear and feel when they lock in, unlike velcro.

 

[rojo412]

I've had my fair share of "Peavey cleanings" over the years and the overall results have been good. They made solid gear that needed to be cleaned out after a few decades, but once done, it works great.
Best of luck! Looking forward to a successful reconditioning for you.

 

[sylvanbass]

No guidance on repair/cleanings, but IMO these were pretty damn solid amps! Had a couple variations of the Peavey 115 combo's back in the day including the one you have there, and they were built like tanks and sounded good to!

 

[Stewie]

Only amp you can pour beer directly into, roll down the stairs and store outside. If they were a wee lighter. You wouldn't need anything else. I sold my 1977 TNT 130 a few years ago.
Looked new and is still running smooth

 

[AudioTaper]

The grill on the one you have is held in by truss head wood screws. No velcro or anything like that (the "sticks" on the older units are more like little mushroom pieces that interlock. My first amp was an '89 Combo 300 I bought used as a teen)

*Make sure its unplugged from the wall*

The speaker connector is a Molex, it may or may not be keyed so watch what direction it's oriented.

Loosen the handle bolts and remove the metal corners on the back. The chassis should slide out the back, make sure the front part with the knobs stays level. If it dips down, it might get hung up.

The caps should have bleed-off resistors, but just watch where your fingers go and be careful.

*Listen to Agedhorse on the DeOxit*

It's a nice amp, I didn't see many of the red graphic series of Peaveys come through my shop.
Good luck!

 

[bass.slinger]

Definitely loosen / remove the handle. I would also take out one of the top airflow grill screws to see if it is a wood screw. If it is a metal screw / bolt, then it most likely connects to the metal amp chassis and you will need to remove those also.

 

[Kaa]

Use an engine hoist.

 

[JRT64]

I started out with a Peavey TNT 115 back in 1978. Used it up until the mid 90's. That thing was built like a tank and totally reliable. Only thing that failed was the speaker cone. And THAT was after 14 years of very heavy use. I replaced it with a JBL, and it was still working when I sold it a couple of years afterward. Peavey really built things to last back in the day. Whether it was instrument amps, power amps, or whatever, it was dependable stuff.

 

[The Ancient One]

The grill on the one you have is held in by truss head wood screws. No velcro or anything like that (the "sticks" on the older units are more like little mushroom pieces that interlock. My first amp was an '89 Combo 300 I bought used as a teen)

*Make sure its unplugged from the wall*

The speaker connector is a Molex, it may or may not be keyed so watch what direction it's oriented.
View attachment 5160297

Loosen the handle bolts and remove the metal corners on the back. The chassis should slide out the back, make sure the front part with the knobs stays level. If it dips down, it might get hung up.

The caps should have bleed-off resistors, but just watch where your fingers go and be careful.

*Listen to Agedhorse on the DeOxit*

It's a nice amp, I didn't see many of the red graphic series of Peaveys come through my shop.
Good luck!

Thanks so much! You were right on the money, almost like you done this before. After following the advice given I was able to pull the amp. The only other problem I ran into was some loose tolex that bound it up a bit. A putty knife resolved that.

The speaker wire is direct into the board but an easy disconnect after pulling the speaker. The grill on this model is screwed on. Because I'm old I took pictures of the wires and marked them as I removed them.

It was much cleaner than expected, mainly cobwebs. Amp is dated 10/3/02. Guess I be holding a 21st birthday party for her.

Since I pulled the speaker can anyone identify the manufacturer? Pic's attached.

Again most grateful for all the help!

 

[bigtone23]

Glad you got it opened up and clean! Now it's good for another 21 years!
The speaker is a proprietary Eminence. Peavey made a lot of speakers (Scorpions, Black Widows, Sheffields), but some amps received an Eminence. Happens all the time, you have a massive, quality speaker manufacturer nearby that can do OEM work...

 

[smurfco]

peavey fever!

 

[agedhorse]

It's an OEM Eminence driver. What's interesting is the bonding strap that bonds speaker - (which is at ground on this amp) to the speaker frame. At one time this was done to comply with some obscure interpretations of safety regulations but that was all cleared up with the introduction of UL/IEC 60065 about 30 years ago.

For those who may be reading this unrelated to this specific amp, do not use that speaker with the bonding strap connected in other amps because these days many amp's speaker - terminals are not connected to ground and that would make the basket energized.