MTX 6500d

radwilsons5803 · 2nd May 2011, 05:56 AM

Hello, this is my first post and im still learning. Ive read many posts and it gives me a headache at times, haha.
I recently picked up this amp and for some reason when i hook it up to my power supply it only reads around 2.5 volts. Any other amp(including the other non working amps i have) ive hooked up reads 13.8 volts instantly. Am i looking at replacing fets, etc? This site is most appreciated and i plan on buying the BCAE Repiar Tutorial asap, thanks

Perry Babin · 2nd May 2011, 02:34 PM

It sounds like it's drawing excessive current. Does it draw down the power supply voltage without remote voltage applied?

radwilsons5803 · 2nd May 2011, 04:31 PM

Yes. Thank you for the quick response

Perry Babin · 2nd May 2011, 04:39 PM

Remove FET601-FET604 and check them out of the circuit. If none appear shorted, clean up the solder pads for the FETs to ensure that there are no solder bridged ans connect the amp to the power supply. Does it still drag down the voltage?

radwilsons5803 · 2nd May 2011, 05:59 PM

Im guessing i need a certain tool to remove the FETs? FET604 definately appears to have some kind of damage to it.

Perry Babin · 2nd May 2011, 06:30 PM

Yes, you'll need solder, a good soldering iron, a desoldering pump or desoldering braid and a multimeter.

radwilsons5803 · 2nd May 2011, 06:54 PM

Have a multimeter already, will pick up the other items and post what i find, thank you

radwilsons5803 · 4th May 2011, 07:40 AM

How do i check them when i have removed them? Thanks

Perry Babin · 4th May 2011, 02:09 PM

Follow the link to the Basic Transistor Testing page in the sig line below. Use the test for FETs.

radwilsons5803 · 4th May 2011, 07:10 PM

Sounds good, thank you

2nd May 2011, 05:56 AM	#1
radwilsons5803 diyAudio Member Join Date: Apr 2011 Location: Minneapolis, MN	MTX 6500d Hello, this is my first post and im still learning. Ive read many posts and it gives me a headache at times, haha. I recently picked up this amp and for some reason when i hook it up to my power supply it only reads around 2.5 volts. Any other amp(including the other non working amps i have) ive hooked up reads 13.8 volts instantly. Am i looking at replacing fets, etc? This site is most appreciated and i plan on buying the BCAE Repiar Tutorial asap, thanks

2nd May 2011, 02:34 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	It sounds like it's drawing excessive current. Does it draw down the power supply voltage without remote voltage applied? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

2nd May 2011, 04:39 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Remove FET601-FET604 and check them out of the circuit. If none appear shorted, clean up the solder pads for the FETs to ensure that there are no solder bridged ans connect the amp to the power supply. Does it still drag down the voltage? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

2nd May 2011, 06:30 PM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Yes, you'll need solder, a good soldering iron, a desoldering pump or desoldering braid and a multimeter. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

4th May 2011, 02:09 PM	#9
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Follow the link to the Basic Transistor Testing page in the sig line below. Use the test for FETs. __________________ 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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2nd May 2011, 04:31 PM	#3
radwilsons5803 diyAudio Member Join Date: Apr 2011 Location: Minneapolis, MN	Yes. Thank you for the quick response

2nd May 2011, 05:59 PM	#5
radwilsons5803 diyAudio Member Join Date: Apr 2011 Location: Minneapolis, MN	Im guessing i need a certain tool to remove the FETs? FET604 definately appears to have some kind of damage to it.

2nd May 2011, 06:54 PM	#7
radwilsons5803 diyAudio Member Join Date: Apr 2011 Location: Minneapolis, MN	Have a multimeter already, will pick up the other items and post what i find, thank you

4th May 2011, 07:40 AM	#8
radwilsons5803 diyAudio Member Join Date: Apr 2011 Location: Minneapolis, MN	How do i check them when i have removed them? Thanks

4th May 2011, 07:10 PM	#10
radwilsons5803 diyAudio Member Join Date: Apr 2011 Location: Minneapolis, MN	Sounds good, thank you

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