Amp repair question - MTX 1501D

Skew · 12th March 2011, 03:11 AM

I have an MTX 1501D amplifier that does not work. The amp has been used very little, and worked fine for me while I had it. I sold the amp to a friend, and he may have damaged it trying to install it and gave it back.

I opened the case and did not find any discolored or burnt components. Are there problems that usually occur with these amps, or any ideas on what to check? I am good with electronics but I do not have an oscilloscope. Any diagrams, guides, or advice would be very much appreciated.

Perry Babin · 12th March 2011, 03:58 AM

Is the older model or the newer model (with the LED display on it)?

Skew · 12th March 2011, 05:14 PM

There is a small LED on the top of the amplifier. I believe this LED turns on but no sound comes out of the subwoofers when everything is connected.

Perry Babin · 13th March 2011, 05:17 AM

Is LED238 lighting up inside the amp?

Skew · 05:50 PM

I do not believe LED238 lights up, but LEDs 399 (highlighted by green box) and the large 463 that shows from the outside near the MTX logo both light up when the 12V and REM terminals are supplied with 12 volts. There is also a faint high-pitched tone that the amplifier emits as soon as it is connected to power, followed by a low volume hissing and crackling sound that continues until power is disconnected. I have attached some pictures of the amplifier. Any help or advice would be great. Thank you.

Perry Babin · 4th April 2011, 07:31 PM

Quote:

I do not believe LED238 lights up

That's not definitive. Check it again. It may take several seconds for it to light up.

Gunman · 11th May 2011, 04:55 AM

Hello, dear friends! I'm from Russia, sorry foe my english

I have a problem with me 1501, do You have a circuit diagram (basic electric scheme, circuit scheme or electrical scheme)? Or may be You can take pictures of the elements (parts) inside it so close, so I can see numbers and letters on all elements?

Perry Babin · 11th May 2011, 06:05 AM

Which parts do you need to see?

Gunman · 11th May 2011, 06:22 AM

Quote:

Originally Posted by Perry Babin

Which parts do you need to see?

all You can give to me

a half of an amp has burned

Can You help me?

Perry Babin · 11th May 2011, 06:48 AM

Post photos of the burned areas/parts.

12th March 2011, 03:11 AM	#1
Skew diyAudio Member Join Date: Mar 2011	Amp repair question - MTX 1501D I have an MTX 1501D amplifier that does not work. The amp has been used very little, and worked fine for me while I had it. I sold the amp to a friend, and he may have damaged it trying to install it and gave it back. I opened the case and did not find any discolored or burnt components. Are there problems that usually occur with these amps, or any ideas on what to check? I am good with electronics but I do not have an oscilloscope. Any diagrams, guides, or advice would be very much appreciated.

12th March 2011, 03:58 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Is the older model or the newer model (with the LED display on it)? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

13th March 2011, 05:17 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Is LED238 lighting up inside the amp? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

4th April 2011, 05:20 PM	#5
Skew diyAudio Member Join Date: Mar 2011	I do not believe LED238 lights up, but LEDs 399 (highlighted by green box) and the large 463 that shows from the outside near the MTX logo both light up when the 12V and REM terminals are supplied with 12 volts. There is also a faint high-pitched tone that the amplifier emits as soon as it is connected to power, followed by a low volume hissing and crackling sound that continues until power is disconnected. I have attached some pictures of the amplifier. Any help or advice would be great. Thank you. Last edited by Skew; 4th April 2011 at 05:50 PM.

11th May 2011, 06:05 AM	#8
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Which parts do you need to see? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links


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12th March 2011, 05:14 PM	#3
Skew diyAudio Member Join Date: Mar 2011	There is a small LED on the top of the amplifier. I believe this LED turns on but no sound comes out of the subwoofers when everything is connected.

11th May 2011, 04:55 AM	#7
Gunman diyAudio Member Join Date: May 2011	Hello, dear friends! I'm from Russia, sorry foe my english I have a problem with me 1501, do You have a circuit diagram (basic electric scheme, circuit scheme or electrical scheme)? Or may be You can take pictures of the elements (parts) inside it so close, so I can see numbers and letters on all elements?

11th May 2011, 06:48 AM	#10
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Post photos of the burned areas/parts. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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