20 Most Recent Pyramid - PS21KX 20 Amp Power Supply Car Audio Amplifier Questions & Answers

0helpful
2answers

PS36K power supply overload problem

Most of Pyramid's supplies are based on the LM723 voltage regulator. The DATASHEET should tell you most of what you'll need to know to repair it. THIS is the schematic diagram.

If the output voltage drives the voltmeter to the end of the scale, it likely has one or more shorted power transistors.
4/29/2021 2:21:20 AM • Pyramid - PS21KX... • Answered on Apr 29, 2021
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1answer

I am getting 240volt accross the ground and neutral at the output

You're getting 240 volts from a pyramid amp? Recommend contacting a local car audio professional or Pyramid customer support directly here: http://www.pyramidcaraudio.com/ContactUs.aspx helpful-j2fqtt4x4km4a1x1cbly0mof-5-0_11.png
2/10/2018 6:49:34 AM • Pyramid - PS21KX... • Answered on Feb 10, 2018
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1answer

I have one of the older 20 amp supplys it has 24

Yes. Recommend contacting a local car audio professional or Pyramid customer support directly here: http://www.pyramidcaraudio.com/ContactUs.aspx helpful-j2fqtt4x4km4a1x1cbly0mof-5-0_10.png
2/10/2018 6:23:01 AM • Pyramid - PS21KX... • Answered on Feb 10, 2018
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1answer

Linking 2 amps together

Say that three times real fast. Recommend contacting a local car audio professional or Pyramid customer support directly here: http://www.pyramidcaraudio.com/ContactUs.aspx helpful-j2fqtt4x4km4a1x1cbly0mof-5-0_10.png
2/10/2018 6:13:05 AM • Pyramid - PS21KX... • Answered on Feb 10, 2018
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1answer

Cooling fan started squealing. It is listed as 25 volt 100 pf. Any idea where to get one?

Yes. Recommend contacting a local car audio professional or Pyramid customer support directly here: http://www.pyramidcaraudio.com/ContactUs.aspx helpful-j2fqtt4x4km4a1x1cbly0mof-5-0_10.png
2/10/2018 6:11:12 AM • Pyramid - PS21KX... • Answered on Feb 10, 2018
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1answer

Cooling fan

Cool. Recommend contacting a local car audio professional or Pyramid customer support directly here: http://www.pyramidcaraudio.com/ContactUs.aspx helpful-j2fqtt4x4km4a1x1cbly0mof-5-0_10.png
2/10/2018 6:10:54 AM • Pyramid - PS21KX... • Answered on Feb 10, 2018
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1answer

What is the protection light

That is exactly what the protection light is for. Recommend contacting a local car audio professional or Pyramid customer support directly here: http://www.pyramidcaraudio.com/ContactUs.aspx helpful-j2fqtt4x4km4a1x1cbly0mof-5-0_9.png
2/10/2018 5:56:38 AM • Pyramid - PS21KX... • Answered on Feb 10, 2018
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1answer

Hello,

I'm not sure what you mean by 'wide open voltage'. If it's over 17v, the supply may have multiple problems. I don't have the 52kx schematic but other Pyramid supplies have over-voltage protection. There is an SCR that is triggered when the voltage gets to ~17v. This should clamp the output and trigger a shutdown. You should check the 16v Zener diode and the SCR. If the SCR or the Zener is defective, that would prevent the over-voltage from clamping the voltage. Also confirm that the SCR has a solid connection to the ground terminal of the supply. If it's open, that could prevent the clamp from shutting down the supply.

If the voltage is going high, measure the DC voltage from pin 4 to pin 5 of the LM723. It should remain the same at all times. Also measure the voltage from pin 5 to the ground terminal of the supply. That should also remain constant at all times.
1/12/2017 9:25:37 PM • Pyramid - PS21KX... • Answered on Jan 12, 2017
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4answers

Pyramid - PS21KX 20 Amp Powersupply overload

The problem I have had with a PS-20 is a blown capacitor. Hooked to a radio, would allow radio to receive fine, but when trying to transmit, amperage would bottom out. Behind the transformer is a large circuit board. UNPLUG POWER SUPPLY, remove cover, Undo the two nuts, flip board over, and gently rock the 4700uf capacitors side to side. If they move more than 1/16th of an inch, chances are they are blown. Remove/replace and should be good to go...
2/6/2014 11:36:32 PM • Pyramid - PS21KX... • Answered on Feb 06, 2014
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2answers

Power suply lights up fine .... when i attach

Make sure is grounded properly and check the wires, the positive is connected to + and negative to -
I hope this helps.
8/5/2012 8:05:08 PM • Pyramid - PS21KX... • Answered on Aug 05, 2012
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1answer

Blows fuses when turn on

Bad amp.
12/12/2011 1:46:43 AM • Pyramid - PS21KX... • Answered on Dec 12, 2011
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1answer

Keep blowing fuses when turned power on

Bad amp. Trash. Sorry sugar :(
12/12/2011 1:44:05 AM • Pyramid - PS21KX... • Answered on Dec 12, 2011
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1answer

Protection light comes on

protection light come on and bets
10/28/2011 6:26:10 PM • Pyramid - PS21KX... • Answered on Oct 28, 2011
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1answer

Have pyramid 26kx converter, protection light

The out put transistor are cooked and will need to be repair.
12/10/2010 8:36:42 PM • Pyramid - PS21KX... • Answered on Dec 10, 2010
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1answer

Ps 52 kx power supply will not hold load

thank you for your help . I have already fixed the power supply I double checked the transisters and found three bad so I replaced all the power transisters and it is fine . thanks again bob
9/20/2009 10:54:39 PM • Pyramid - PS21KX... • Answered on Sep 20, 2009
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1answer

Pyramid ps-36kx

Generally, the fuse only blows when the rectifiers fail. In other Pyramid supplies, they use a square, 4 terminal bridge rectifier. They probably use the same thing in your supply.

Let me know if you have any other questions.
1/24/2009 3:13:09 AM • Pyramid - PS21KX... • Answered on Jan 24, 2009
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1answer

Pyramid Power Supply PS 52KX

I have used this tech for repairing some of my radio equipment and found him to be honest and dependable A rare thing now days. check with him at [email protected]. Unless you are wanting to take a shot at repairing it yourself if so I will do some searching myself to see if I can give you a hand on it.
12/25/2008 2:44:26 AM • Pyramid - PS21KX... • Answered on Dec 25, 2008
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1answer

Pryamid ps36k power supply

Have you done any troubleshooting at this point?

Are you going to try to repair this yourself?

Have you tried to locate a schematic for the supply?
3/13/2008 6:28:00 PM • Pyramid - PS21KX... • Answered on Mar 13, 2008
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2answers

What is a pyramid schemes?

Hi Linda, It's called a pyramid because it starts with one person putting money into a fund, Say it's a guy, He then invite as many people as he can(say 10) to do the same and then those 10 people invite as many as they can(say 10 each x10=100) and so on100x10=1,000) and on(1,000x10=10,000)... see how it grows... And what happens is the 1st guy gets a percentage of the money from the 10 people he invites plus a percentage from the 100 people they invited and it goes on and on, , the people he invited get a percentage of the people they invite plus a percentage from the people they invited and so on and on and it just keeps going and going and the higher on the list you are the more money you get but the lower on the list you are the more you struggle as it gets harder and harder to make money because everybody above you on the list are all getting a percentage from people all down the list until eventually everybody on the bottom of the list looses all their money and that's why it's *******......DO NOT DO IT, If you make any money from this scheme just know it's from people loosing theirs, Take care.........
1/13/2022 5:20:58 AM • Pyramid Car... • Answered on Jan 13, 2022
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1answer

Tuscany pyramid awing instruction diagram sheet for the framework.Thnks Bruce

Over 10 year old messages on a another board referred to expired web sites that are no longer operating. I saw a reference to the following web site: http://www.canvaslove.co.uk/pyramid-awning-instructions
7/22/2019 4:56:51 PM • Pyramid Car... • Answered on Jul 22, 2019
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