Xtant x1001 powers up no sound

integrite07 · 18th June 2011, 04:13 PM

I'm working on this amp for a friend of mine. I have fixed all the power supply side so it powers up i get the led power light on and 2 other led lights next to a small transfore labeled led 406 and led 407 i don't really know if these are an error code/alarm. Also i have been getting some odd readings when i compare the two hcpl3120 octo's. Any help would be amazing here are a few pics.

Thank you

Perry Babin · 18th June 2011, 06:58 PM

If the LEDs are protection circuit indicators, they should have light-pipes extending down to them from the top cover.

Is the LED near the opto-couplers (LED236?) lit?

integrite07 · 18th June 2011, 07:01 PM

No LED236 is not lit. The only LED's that are lit are the ones i previously stated. Any ideas?

Perry Babin · 18th June 2011, 07:07 PM

If the LEDs are protection circuit indicators, they should have light-pipes extending down to them from the top cover. Do they have light-pipes from the top cover?

Are the protection indicators elsewhere on the cover?

integrite07 · 18th June 2011, 07:09 PM

Sorry about that, no they do not

Perry Babin · 18th June 2011, 08:37 PM

Are the protection indicators elsewhere on the cover?

integrite07 · 4th July 2011, 03:31 PM

The protection light-pipes are on the upper left near the output fets. I'm sorry for the delay but i was out of town. Anything you can suggest i changed the 3120 octo's when i pulled the old ones i they tested good.

Perry Babin · 4th July 2011, 03:41 PM

With the black probe on pin 5 and the red probe on pin 8, what is the DC voltage on each of the 3120s?

integrite07 · 4th July 2011, 03:48 PM

4.2 on the left one and 20 on the right one

Perry Babin · 4th July 2011, 05:10 PM

4.2 isn't enough. It should be 15-20v. Find the regulator for it and determine why it doesn't have the correct output voltage.

18th June 2011, 06:58 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If the LEDs are protection circuit indicators, they should have light-pipes extending down to them from the top cover. Is the LED near the opto-couplers (LED236?) lit? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

18th June 2011, 07:07 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If the LEDs are protection circuit indicators, they should have light-pipes extending down to them from the top cover. Do they have light-pipes from the top cover? Are the protection indicators elsewhere on the cover? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

18th June 2011, 08:37 PM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Are the protection indicators elsewhere on the cover? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

4th July 2011, 03:41 PM	#8
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	With the black probe on pin 5 and the red probe on pin 8, what is the DC voltage on each of the 3120s? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

4th July 2011, 05:10 PM	#10
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	4.2 isn't enough. It should be 15-20v. Find the regulator for it and determine why it doesn't have the correct output voltage. __________________ 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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18th June 2011, 07:01 PM	#3
integrite07 diyAudio Member Join Date: Jun 2011 Location: Mishawaka, IN	No LED236 is not lit. The only LED's that are lit are the ones i previously stated. Any ideas?

18th June 2011, 07:09 PM	#5
integrite07 diyAudio Member Join Date: Jun 2011 Location: Mishawaka, IN	Sorry about that, no they do not

4th July 2011, 03:31 PM	#7
integrite07 diyAudio Member Join Date: Jun 2011 Location: Mishawaka, IN	The protection light-pipes are on the upper left near the output fets. I'm sorry for the delay but i was out of town. Anything you can suggest i changed the 3120 octo's when i pulled the old ones i they tested good.

4th July 2011, 03:48 PM	#9
integrite07 diyAudio Member Join Date: Jun 2011 Location: Mishawaka, IN	4.2 on the left one and 20 on the right one

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