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Diagrams for rockforfosgate 40ix mosfet amplifier.

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Wiring diagram or service diagram?

Posted on Dec 11, 2009

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Posted on Jan 02, 2017

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Free manual for mosfet phase linear upa424 240watt amplifier


You do have 12 volts connected to the remote connection, correct?

Dec 11, 2013 | Phase Linear UPA424CS Car Audio Amplifier

1 Answer

I'm looking for wiring diagram and service manual for PRX-635. Mosfets are out of order, I want to fix and understand it kk happened. I have the necessary education and experience. Thank you. ...


This unit has Class "D" amplifier which is a switching type, unlike most linear amplifiers you might be familiar with. The MOSFETs operate either in full on or full off mode and switch... probably at 100KHz or more with a duty cycle proportionate to the desired output. The energy is then smoothed in an inductor/capacitor filter becoming the desired linear type signal. You MUST have a triggered oscilloscope to troubleshoot this type of an amplifier. You may also need experience with logic circuits as often the current limiters for the switchers uses logic circuits. Thepower supply for most of these high powered call D amps runs from the power line and you will need an isolation transformer to safely work on the unit, primarily for personal safety. Search Google for "Class D amplifier" for information if you haven't had engineering education on these amps.

Aug 25, 2011 | JBL PRX635 Speaker PA Active

1 Answer

Infinity 600 wat amp


Your amplifier is having a serious fault within preventing further damage to the amplifier. If could be a failure of the output mosfets, failure of the predriver, failure of the bias to the output mosfets, short inthe speakers- check this out- fault inthe error amp section for wrong current indiication or malfunctions in the mother board. All of this will need careful location of the fault by checking ont these stages. Porceed only if you are competent or seek help. Good day

Jun 28, 2010 | Infinity 468W Class AB Bridgeable...

2 Answers

Where can I get wiring diagram?


www.pyleaudio.com/manuals/PLMRA220-420.pdf

Jul 22, 2009 | Pyle - plmra220 - Marine 600 Watt 2...

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Trying to find the right FET to replace burnt up ones with


hafler use international rectifier hexfets. there is alot of confusion what constitutes a mosfet amplifier.
if the outputs are mosfets instead of bipolar transistors, it is a mosfet amp.
some designs are using mosfets to drive the switch mode power supply,but use bipolar output transistors.that is not a true mosfet amp.
you need to go to an electronic supplier for the repair industry.
or the manufacturers warranty depot,who will be able to order them.mosfets are very high current devices,you have to ask ...why did they fail. if they are the switch mode drivers,there is bad capacitors in that circuit

May 23, 2009 | MTX Thunder 5-Channel Amplifier 895 Car...

1 Answer

Blown mosfet


Hello dancisbrown,

If you or someone you know is relatively skilled at soldering, you should be able to replace the MOSFET. The problem may be in determining a suitable replacement. First get the data off of the blown component and then go here to the MOSFET cross-reference guide. http://clivetec.superihost.com/MOSFETs.htm

After you have found a replacement, go here to purchase the new one. http://www.mouser.com/

You might want to consider replacing all 4 while you have the board out.

Hope this helps.

Apr 14, 2009 | Kenwood KAC- X810D Car Audio Amplifier

2 Answers

Too many repairs


sounds like you power supplies (mosfets) are bad

Jul 11, 2008 | Crate SPA1600 Power Amplifier - SPA Series...

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