Orion XTR 2250 The Beast

[Jason Smith 616]

This amp is using MTP60N06HD as the power supply fets with 100 ohm gate resistors.

Wondering what is the best replacement for the power supply fets ? and do i change the gate resistor value according to what fets i use ?

Also for the regulators in this amp are they using the LM317/337 or are they using 2N6491/2N6488 as the regulators wondering since they are missing from the board

Also would updating the chipset from 494 to a 594 be beneficial or not really

 

[Perry Babin]

10 ohms, more likely. They;'re OK.

3205 (best?)

If it has a zener with the regulated voltage on leg 1, rail on leg 2 and the 3rd leg is output, 88/91.

 

[Jason Smith 616]

Also 2 other questions.

Would switching the chipset from 494 to 594 be beneficial or not really?

And would these be good replacements for the switches?

F2UEEAU C&K | Switches | DigiKey

 

[Perry Babin]

I doubt it. I only order the 594 so if it were bad, that's what I'd use but for no other reason than that's what I'd have.

I don't know about the switches. If they are correct dimensionally, they should work.

 

[Jason Smith 616]

I started putting the gate resistors in this amp.

I ran into a problem already with this amp.

I checked for solder bridges and didnt find any.

Problem i'm having is from pads 2 to 3 for the power supply fets i'm getting 1 ohm

Any ideas on what might cause this?

 

[Perry Babin]

Pull the fuses. Do you read 1 ohm on both supplies?

 

[Jason Smith 616]

Took the fuses out .

1 supply i'm getting 1 ohm between pads 2-3

The other supply i'm getting readings in the K ohms range like its charging a cap

 

[Perry Babin]

Try twisting the transformer. Also be aware that these boards will hold solder on the rough edge of the board and bridge where it;'s not visible from overhead.

 

[Jason Smith 616]

I found a short in 1 transformer and fixed it.

Next question is do you happen to know the value of this cap red arrow pointing to it

Is the cap the same as the other 2? 470UF 100V

 

[Perry Babin]

I don't but if it's connected to the corresponding parts of the other supply as the other 470uf, I'd assume that it's the same value.

 

[Jason Smith 616]

DO you happen to have a pic of the power supply section of an Orion 2100 HCCA?

Im thinking the 2100 is very close to this amp and i need to see if i can find the value of this cap and there is another cap or diode missing

 

[Perry Babin]

The photos I have show the 2100 that has the caps laying down (axial configuration) in the primary and secondary.

 

[Jason Smith 616]

I think i have the caps figured out.

I'm going to order new caps for this amp since some are missing and others are old i want all matching caps.

What would yo recommend Nichicon or Panasonic caps or doesn't really make a difference ?

 

[Perry Babin]

I don't have a preference.

 

[Jason Smith 616]

This amp is missing 1 of the FEP30DP rectifiers.

Would the SF304C be a good replacement?



FEP30DP-E3/45 Vishay Semiconductors | Mouser


https://www.mouser.com/ds/2/345/sf301c-sf307c-8990.pdf

 

[Perry Babin]

Isn't that the wrong case style?

 

[Jason Smith 616]

Not sure why the datasheet shows a different package style.

Both are TO247 package style