Question about Pyramid (PS36KX) 600-Watt Power Supply

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PS-36KX Protection light flashing and alarm.

While powering a TS-440, the supply shut down. I noted a blown 8 amp fuse. Replaced it and saw the "protection" light flashing and the alarm sounding. No automatic reset as promised in the owners manual. Unit is three months old. What do I check first??

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Check all transistors that are atached to
heat sinks , For a short between two of the
three legs. It can't be reset becuse you have
a short.



Posted on Jul 25, 2009

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Posted on Jan 02, 2017

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1998 Jeep Laredo continuous clicking sound passenger side under dash it runs battery down ignition is off continuous clicking please help thank you


A number of people in the link report the same problem on the Jeep Forum and there are a number of fixes.

I also found this for you.

The problem seems to be a short in one of the rear dome lights, which seems to be affecting two fuse circuits. The temporary solution was to remove one fuse and replace another (blown), and remove the bulb from the bad dome light. I had to remove "fuze#5-15 amps-Interior Lighting", this stopped the clicking noise, I replaced blown fuze#8-15 amp-Overhead Console, keyless Entry ..." This fuse also seems to effect the alarm system (contrary to the documentation), and I think that was what was killing the engine. The problem existed before fuse#8 blew. Removing fuse#5 may have solved the problem, but the other fuse blew while I was testing the dome lights, and the jeep will not start without it.

Found lots of wires bare or broken in all the door wiring harnesses ( in rubber boot that goes to the door)I first checked both fuse 5 and 8 but both o.k. After fixing the broken wires found fuse 8 had blown. Replaced that and all is well again. Thanks for the advise got me looking in the right direction.

. Fuse box located in passenger side door jam...check #8 fuse if its not blown check others...if it is blown, check your radio, and interior lights for good ground
Clicking noise under passenger dash Jeep just shuts down

Jan 10, 2016 | Jeep Cars & Trucks

1 Answer

Protection light flashing and alarm sounding, unit was running and the unit just quit and the flashing light and alarm came on


Will the unit power up without the cb radio? I would suggest a short somewhere in the system if the protection light continues to shine bright.

Mar 24, 2013 | Pyramid (PS36KX) 600-Watt Power Supply

2 Answers

The red light just stays on .I changed the fuse and the same thing


Needs to get a Depot service done for the Electronic board. Could be an issue with Capacitor or IC. Good luck.

Jan 07, 2011 | Pyramid (PS36KX) 600-Watt Power Supply

1 Answer

Sanyo DP5747 Plasma TV no power


Found 1 of the 2 ac supply ( 8amp) fuses blown on the main pwr. supply. Replaced fuse and good so far. Looked over the ps for damaged components, none found. Checked current with ampmeter with tv on, showing 3amps. Cheers

Jan 03, 2010 | Sanyo Televison & Video

1 Answer

Re: Pyramid PS-36kx power supply buzzer sounded,red light came on


Hi! I saw your question, and maybe this will help. I also have a Texas Star 100w amp, and this same power supply. Even though the nominal draw for your equipment is way below the rated amp flow of the power supply, when you key up, and the output on the amp is at max, you are drawing the limit of your power supply! Try running this setup at a lower linear output. You don't need the full 100 watts to get out! 60-80 watts is aplenty! You should start at a low output, and slowly increase the output(while keyed up), untill the power supply starts to complain.(buzzer/light). This is what your limit will be. The only other cure, is a MUCH bigger power supply. Unfortunately, I cannot afford a 60-90 amp supply, so this is what I am forced to do to use the one we have. Also,keep your cb's output very low when using the linear amp. These amps are supposed to get a low signal from your radio, or the linear amp is overdriven. (noisy and unstable. Hope this helps you! 73's to you! jimsjinx

Apr 30, 2009 | Pyramid (PS36KX) 600-Watt Power Supply

1 Answer

I have an audiobahn A8000t amp with the protection light on


There are many different ways that an amp can fail but the two most common failures are shorted output transistors and blown power supply transistors (< those are not blown). There are several types of protection circuits in amplifiers. The most common are over-current and thermal. The over-current protection is supposed to protect the output transistors. Sometimes it doesn't work well enough to prevent the failure of the output transistors but it will work well enough to shut the supply down before the power supply FETs are destroyed. If the amp remains in protect mode, goes into protect mode or blows the fuse as soon as the remote voltage is applied, shorted output transistors are almost certainly the cause. If the fuse protecting the amp is too large, if the protection circuit doesn't respond quickly enough or if the power supply is poorly designed, the power supply transistors may fail. If you see a lot of black soot on the power supply transistors (near the power transformer), the power supply transistors have failed. Soot on the board doesn't necessarily mean the transistors have failed. Sometimes, technicians don't clean up the mess from a previous failure.
In general, when a transistor fails, it will either short (common for output AND power supply transistors) or open (common for power supply transistors). Transistors act like valves. They control the current flowing through a circuit. A shorted transistor acts like a valve that's stuck open (passing too much current). In the case of an output transistor, the shorted transistors tries to deliver the full rail voltage to the speaker output terminal. If you've ever seen a damaged amp that pushed or pulled the speaker cone to its limits when the amp powered up (common on some Rockford amplifiers), that was almost certainly due to a shorted output transistor. When checking transistors, you most commonly look for shorted connections inside the transistor. You do this by using a multimeter to look for low resistance connections between the transistor's terminals.
Note:
I used the terms short and open on the previous paragraph. A short (short circuit) is a path through which current flows that should not be there. An open (open circuit) is a break in the circuit.

Dec 30, 2008 | AudioBahn A8000T Car Audio Amplifier

1 Answer

I have a fosgate 301x with power to the amp but none coming out


There are many different ways that an amp can fail but the two most common failures are shorted output transistors and blown power supply transistors (< those are not blown). There are several types of protection circuits in amplifiers. The most common are over-current and thermal. The over-current protection is supposed to protect the output transistors. Sometimes it doesn't work well enough to prevent the failure of the output transistors but it will work well enough to shut the supply down before the power supply FETs are destroyed. If the amp remains in protect mode, goes into protect mode or blows the fuse as soon as the remote voltage is applied, shorted output transistors are almost certainly the cause. If the fuse protecting the amp is too large, if the protection circuit doesn't respond quickly enough or if the power supply is poorly designed, the power supply transistors may fail. If you see a lot of black soot on the power supply transistors (near the power transformer), the power supply transistors have failed. Soot on the board doesn't necessarily mean the transistors have failed. Sometimes, technicians don't clean up the mess from a previous failure.
In general, when a transistor fails, it will either short (common for output AND power supply transistors) or open (common for power supply transistors). Transistors act like valves. They control the current flowing through a circuit. A shorted transistor acts like a valve that's stuck open (passing too much current). In the case of an output transistor, the shorted transistors tries to deliver the full rail voltage to the speaker output terminal. If you've ever seen a damaged amp that pushed or pulled the speaker cone to its limits when the amp powered up (common on some Rockford amplifiers), that was almost certainly due to a shorted output transistor. When checking transistors, you most commonly look for shorted connections inside the transistor. You do this by using a multimeter to look for low resistance connections between the transistor's terminals.
Note:
I used the terms short and open on the previous paragraph. A short (short circuit) is a path through which current flows that should not be there. An open (open circuit) is a break in the circuit.

There are no internal fuses on any car audio Amplifier. Servicing will be required.

Dec 30, 2008 | Rockford Fosgate Punch 301X Car Audio...

1 Answer

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.

Nov 15, 2008 | Pyramid - PS21KX 20 Amp Power Supply Car...

2 Answers

Pyramid 35 amp regulated power supply


Use specified power supply by the computer.

Feb 05, 2008 | Computers & Internet

2 Answers

Amp in protection mode


Disconnect all speaker wires and signal cables from the amp. If it powers up normally (doesn't go into protection), the wiring needs to be checked. If it still shuts down, the amp likely has blown output transistors.

Nov 11, 2007 | AudioBahn A4401Q Car Audio Amplifier

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