Xtant x1001 powers up no sound

[integrite07]

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]

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]

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

 

[Perry Babin]

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]

Sorry about that, no they do not

 

[Perry Babin]

Are the protection indicators elsewhere on the cover?

 

[integrite07]

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]

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]

4.2 on the left one and 20 on the right one

 

[Perry Babin]

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.

 

[integrite07]

The regulator gauges correctly. It doesn't make sense to me.

 

[blong1012]

Hey i have the same problem with my xtant1001 did u ever figure out what was wrong?

 

[kfx5050]

have the same amp but my led 236 light up. not at as birght as the power led mebe one shad dark but it is light up. i dont have any out put. any idas???