EV 118P sub

[lowell]

Anyone have a SM or schematic? Got one with no sound.

[Enzo]

Have you tested the speaker itself? Any amplifier has a power supply, which should be recognizable without a drawing. Do the caps charge? If it has peak lights, do they flash with peaks? Any sort of preamp inside with op amps ought to have a +/-15v power supply, it that present at the ICs?

Is the power supply linear or SMPS? Is the amp itself linear or digital?

[lowell]

Good questions.

Its not the speaker.

The main rails are good and are at the output devices.

I need to check the low v supplies. The limiter light isnt lighting. The Logo light is.

Its definitely SMPS. And prrtty sure it's Class D.

[lowell]

Scratch that. The -45v supply is good. The other is +42v and slightly fluctuating. This remains with the PA disconnected.

A little info on what is in here, since we don't have a schematic.

There is TIP31 and TIP32 in here. They're on the pcb that the input jacks are mounted to. They test fine with my meter, no obvious shorts.

There are 2 78m33 regulators. It's a +3.3v type. Yes 2. And I don't see any others, therefore the lack of a negative complementary regulator. ??
They each however have different "other" codes on them. One is 78m33 1cmjnye, and the other is, 78m33 21mcf2e.

The + supply feeding them is fluctuating +9-14v. And the 3.3v is there for a millisecond, then gone, it's pulsing.

The PA has two STP14NF12 on each output board. (2 boards). http://www.mouser.com/ProductDetail/...Pna0lGxA%3D%3D.

[lowell]

Anyone a service center? Could someone pm me a schematic?

[Enzo]

Did you call EV and ask if they would provide it?

[TomCarlos]

Did you look on the EV Web site?

They have current and discontinued schematics.

[lowell]

I did and dont see it. I emailed them a week ago. Guess I'll try to call. I saw online someone saying they wont provide them to non-authorized service people. I'm definitely gonna call anyway and see what I can get.

[lowell]

Negative. They said it'll have to be sent to them.

[Jazz P Bass]

Or send it to this guy: EV ElectroVoice ELX118P/ ZXA1 SUB Subwoofer amp amplifer module REPAIR SERVICE!! | eBay

$149.00 + freight

[Jazz P Bass]

Whoa!

Replacement amp: Electro-Voice F 01U 174 480 Amp Assembly for EV ELX118 | Full Compass

$249.00

Now that is salty.

[tbonuss]

Haha. Yeah I saw that last night when I was trying to see if I could find the scat, and spit hot tea all over my freaking laptop.