XForce 1KW supply voltage.

[BJ radionut]

XForce 1KW supply voltage.​

This is gonna be a dumb question but I’m very novice when it comes to amplifiers. Should this be around 13.8 VDC. At the points I circled? Feel free to add other members.

Jim5570091

www.worldwidedx.com

Copied from direct message to me...

 

[AudioShockwav]

Can't see the image Gary.

73
Jeff

 

[BJ radionut]

weird shows on my screen???

 

[Jim5570091]

 

[Jim5570091]

Hope attaching the photos clears the photos. The 3 transistors that turn the fans on smoked as soon as it powered on. Just need to figure out what power is supposed to be on the the main power bar. I think it’s set up like a mobile amplifier with a power supply added.
Thanks again.

 

[Jim5570091]

I have a gut feeling the transformers broken down and sent 110 vac to the main board.

 

[Shadetree Mechanic]

Might be as high as 16 or 18 volts because it is an unregulated power supply. When keyed, the voltage should sag to 13 or 14 volts depending on the load. Is it wired for 120v or 240v? I don't think it got 120v to the main board, because it would have launched the big capacitors with the bus bars on them. Maybe it's wired 120v and you have it plugged into 240v?

By the way, what voltage do you see measuring at those points?

 

[Jim5570091]

It is wired 110vac. I will have desolder the wires from the buss bar to test. I’m scared I’ll pop something else. Looks like it’s using two separate transformers on individual setup. I plan on removing the wires and testing the voltage on them later tonight. Just needed to know what I should be seeing.

 

[Jim5570091]

And I’ve been running it for several years. 110vac.

 

[linearone]

XForce 1KW supply voltage.​

This is gonna be a dumb question but I’m very novice when it comes to amplifiers. Should this be around 13.8 VDC. At the points I circled? Feel free to add other members.

Jim5570091

www.worldwidedx.com

Copied from direct message to me...

They used to float at 18-20 and drop to 14-16

 

[AudioShockwav]

They used to float at 18-20 and drop to 14-16

Yep, not regulated so they float with no load on them.
The one I had would float at @22 and pull down to 18-19 under load with the the hi taps on the transformers used.
73
Jeff

 

[Jim5570091]

They used to float at 18-20 and drop to 14-16

I read 21 VDC. No load. So I guess that rules that out.

 

[linearone]

I read 21 VDC. No load. So I guess that rules that out.

Thats fine. When u key it it will drop down

 

[Jim5570091]

I did continuity test across ground to buss bar while the wires were disconnected. Their common so I have a short somewhere. Going to start removing components one at a time until I find the short. Thanks for your advice.

 

[linearone]

I did continuity test across ground to buss bar while the wires were disconnected. Their common so I have a short somewhere. Going to start removing components one at a time until I find the short. Thanks for your advice.

What is the issue you are trying to resolve? Does the box run?