subwoofer amplifier help

at1receptor · 23rd June 2007, 02:50 AM

Can someone please help me with my Definitive Tech PF15TL? There is no sound but it powers up. Changed the resistor that was blown (19.1 kohms) and STK4050V but still no sound. A schematic was shared in March 2007 and I'm using this as a guide. I'll appreciate all the help. Thanks.
at1receptor

XEAGLEKEEPER · 23rd June 2007, 05:13 AM

If I could view the schematic I may be able to help.

Dave

at1receptor · 23rd June 2007, 01:21 PM

Yes. Here is the schematic: And thank you very much.

Sonusthree · 23rd June 2007, 01:27 PM

Aha! The answer seems so clear now! In fact .......... transparent!

XEAGLEKEEPER · 23rd June 2007, 02:37 PM

at1receptor
In your user control panel enable e-mail

Dave

at1receptor · 23rd June 2007, 07:48 PM

Yes

at1receptor · 23rd June 2007, 07:48 PM

You can email me at beta_1_block@yahoo.com. Thanks again.

at1receptor · 23rd June 2007, 07:48 PM

Can you tell me what's transparent?

Sonusthree · 23rd June 2007, 08:00 PM

Quote:

Originally posted by at1receptor
Can you tell me what's transparent?

Sure. It was supposed to be a joke based on the fact that, when I first saw the post and when I posted, the schematic was not attached!
I saw that the schematic appeared later but I was too busy to edit my post at that time.

Live long and prosper,
Martin

jerluwoo · 23rd June 2007, 08:14 PM

That 19.1k is for the muting so I would check the muting control circuit. If it isnt supplying enough voltage then the amp will stay in mute mode. See if that mpsa92 controlling it is bad.

23rd June 2007, 02:50 AM	#1
at1receptor diyAudio Member Join Date: Jun 2007	subwoofer amplifier help Can someone please help me with my Definitive Tech PF15TL? There is no sound but it powers up. Changed the resistor that was blown (19.1 kohms) and STK4050V but still no sound. A schematic was shared in March 2007 and I'm using this as a guide. I'll appreciate all the help. Thanks. at1receptor

23rd June 2007, 05:13 AM	#2
XEAGLEKEEPER diyAudio Member Join Date: Jan 2006 Location: central Iowa	If I could view the schematic I may be able to help. Dave __________________ Ret. USAF... AKA- Avionic * Solder slinger for hire...*

23rd June 2007, 02:37 PM	#5
XEAGLEKEEPER diyAudio Member Join Date: Jan 2006 Location: central Iowa	at1receptor In your user control panel enable e-mail Dave __________________ Ret. USAF... AKA- Avionic * Solder slinger for hire...*

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23rd June 2007, 01:27 PM	#4
Sonusthree diyAudio Member Join Date: Dec 2005 Location: Brighton,UK	Aha! The answer seems so clear now! In fact .......... transparent!

23rd June 2007, 07:48 PM	#6
at1receptor diyAudio Member Join Date: Jun 2007	Yes

23rd June 2007, 08:14 PM	#10
jerluwoo diyAudio Member Join Date: Feb 2006 Location: Ashland,Ky U.S	That 19.1k is for the muting so I would check the muting control circuit. If it isnt supplying enough voltage then the amp will stay in mute mode. See if that mpsa92 controlling it is bad.

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