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Old 28th May 2009, 03:45 AM   #1
91h22a is offline 91h22a  United States
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Default help with my Xtant 1001d

Hello all I have an xtant 1001d amplifier and it has very low sound output so I determined this must have something to do with the muting circuit. So i have traced the remote lead and found what appears to be a missing capacitor in location C53. The leads remain and look like the cap has broken off.

Now I purchased this amp broken (all jumpers in correct locations) and as all of you know there is really no help when it comes to xtant. So I hope to get some good advice here from some repair veterans.

I am an electronics tech but only for about a year and I only work on lcds plasmas blu rays but never without schematics! So my limited experience leaves me lost and I have all but begged (well maybe a little) Xtant for schematics. Any help would be greatly appreciated and any advice on this amp would also be welcomed.

I am determined so no suggesting sending it to a repair facility
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Old 28th May 2009, 09:20 AM   #2
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Are the gain jumpers in the +20dB position?

Are the gain pots at the maximum position?

With 1v in, what is the output voltage on the speaker terminals?
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Old 29th May 2009, 03:22 AM   #3
91h22a is offline 91h22a  United States
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Mr. Babin, thanks for the prompt response. I hooked a 1v signal to the amp with the signal jumper at the +20db setting and the gain turned to max and got something like 1.5volts at the speaker terminals. Then I did some looking all over the amp and found the large iron core transformer to have 6 out of 16 (or 20 i am not certain) of the legs broken just slightly so the only way I found them were to pry them away from the pcb. So I cleaned off the coating and soldered the broken leads and now i am seeing something like 44 -55v (depending on the gain). So Mr. Babin what if any suggestions do you have...the amp seems to be producing much more power but I am still curious to hear your thoughts before throwing it into the car. Again thanks for your expertise and assistance.



David
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Old 29th May 2009, 12:38 PM   #4
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It sounds like you found the problem. Reinstall it to see if there are any other problems.
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Old 29th May 2009, 01:03 PM   #5
Westerp is offline Westerp  Netherlands
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I would hook it up to a couple of resistors around 8 ohm 30 watt with a
small speaker and 50 ohm in series across then feed it a signal first. Putting it
back without being sure it works as intended could cost you your speakers.
That voltage at the output could be anything.
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Old 29th May 2009, 03:38 PM   #6
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It appears to be working. With 1v in, it was producing 40+v on the outputs.
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Old 30th May 2009, 07:10 AM   #7
91h22a is offline 91h22a  United States
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Thanks gentleman for your input!

Mr. Babin thanks to you especially because I have your DVD for Basic Car Electronics and it certainly helped me with this endeavor.

The amp seems to be working well after a 10hr burn in at medium levels and I am happy to say I feel confident enough to incorporate this amp into my vehicle.

Thanks again and I hope I can help you in return sometime.


David
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Old 21st July 2009, 04:21 AM   #8
darylf is offline darylf  United States
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Hey do you still have your x1001d? If so you could you look up a couple of vaules for me?

thanks
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Old 21st July 2009, 01:57 PM   #9
91h22a is offline 91h22a  United States
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I do. Let me know what you need and I will get back to you as soon as I can.
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Old 21st July 2009, 09:55 PM   #10
darylf is offline darylf  United States
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Great, Thank you so much.

Im in need of these values.

Q25 last on on the top row of fets.

I need to know what Q35 is, its about 3 inches below to the left of Q25

and Q3-11. left side of the fets. I have IRFz44N, but Im not sure they are the correct fets.

Also my board is PCB-1001d

And has no fans on the heat sink.

thanks again.
Daryl
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