RESSETTING THE OVERLOAD PROTECTION CIRCUIT OF THE PYRAMID PS-36K

not enoghf power in

What is the speaker load in Ohms that you are running? Or what exactly is hooked up to it? are you bridging it? The protection light will come on if the load is too much for the amp to handel. If the load (in Ohms) is less than the rated load that it can run, it will stop the output to keep the amp from self destructing. The amp will sense that the demand for power will be too high for the amps circuitry which will either make the amp get so hot that it will burn up the copper on the board or more likely burn up the power mosfetts that power the speakers. If the Ohms are within range then it will allow power to flow through the circuit until the rails that the mosfetts are bound to until they get so hot that it will go into thermal protection. So if your amp has both thermal and overload protection lights and the overload is light then the load is probably too much for the amp. if it's bridged in mono the you can only have 1 speaker setup hooked up it if it's a 2 channel amp. a 4 channel amp bridged in mono for both front and rear channels will be able to have 2 speakers rated a 4 ohms each hooked up to the amp 1 set per bridged output or channel.
Try it running in stereo with only 1 speaker per channel and see if it will produce sound. If not then you have an amp that has internal problems and will need to be serviced. Check your warranty to see if you are covered.

Recommend contacting a local car audio professional or Pyramid customer support directly here:

http://www.pyramidcaraudio.com/ContactUs.aspx

Perfect for Home, Shop & Hobbyist. * Input: 115V AC, 60Hz, 270 Watts. * Output: 13.8V DC. * 12 AMP Constant/14 AMP Surge. * Powers Cellular Phones,12V DC CB Radios, Scanners, HAM Radios, Autosound Systems. * Screw Terminal Connectors. * Electronic Overload Protection w/ Auto Reset. * Short Circuit & Thermal Protection. * Fuse Protected. * LED Condition Indicators. * Heavy Duty Cabinet & Heatsink w/Anti-Skid Rubber Feet. * Dimensions:7.87'L x 7.16'W x 4.72'H

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/jason_77a19afa8d604dee

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

One of your power transistors might have gone short circuit, You will have to have them repaced.

try changing the battery out

If you need further help, reach me via phone at https://www.6ya.com/expert/david_eb7ea98642566cc6

you need to get the voltage regulator circuit checked in your ps-21k

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...

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.