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Why channel A clipping on soundcraftsmen ma5002a what's wrong

Why channel a is in clipping mode all the time? Checked DC output at speaker binding posts. Channel A was 91 volts, channel B was 0 volt.

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  • Master
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When you have a DC voltage on the output, check your capacitors in the amp. Looks like the big electrolytic is defect.
I don't have a manual of this amp, so I can't verify if I'm right and what cap you should look for.

Posted on Nov 21, 2014

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Posted on Jan 02, 2017

  • 4234 Answers

SOURCE: soundcraftsmen MA5002A ( B channel is dead)

Each of the output transistors should have numbers/letters silkscreened on them. Post the markings here and I can give you the entire part numbers.

Dan

Posted on Apr 15, 2009

  • 4234 Answers

SOURCE: i have a sound tech ps 1300 amp. at start up

The output transistors are shorted at the least. This unit requires service. If I remember correectly, there are 6 output transistors per channel on this one, so expect a parts cost in the $50-$80 range.

Dan

Posted on Oct 10, 2009

Grubhead
  • 5017 Answers

SOURCE: One channel dead - Aiwa NSX-D5 (RX-N5K amp)

When you put your headphones in does it switch off the speakers? If it does it could be a faulty headphone jack.

Posted on Jun 17, 2010

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petraman7
  • 1175 Answers

SOURCE: One (right) preamp blow! I've located the problem

hi...
transistors are not ok on the C160 module.
replace all the power transistors and emitter resistors for that channel.
www.bdent.com and www.ceitron.com are good for transistors

Posted on Oct 04, 2010

  • 55 Answers

SOURCE: I have a Crown XLS 1000 running in stereo highpass

Make sure you are getting a signal into channel 2, A cable swap will tell you this.

Posted on Oct 09, 2010

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Soundcraftsmen MA5002A channel A in clipping mode all the time. What is wrong?


Swap the inputs and see if the chanel changes, if so the problem is in your input, if not you need to get it repaired.

Nov 18, 2014 | Car Audio & Video

1 Answer

Shut up stereo protect mode?


Protect mode is on because something in your speaker wiring is wrong, or you have a broken speaker, or it\'s too late and you already fried one or more of the amp\'s output transistors.



You gotta fix the problem. Not remove the safety guard and carry on with a busted machine.



Look for wires touching between the speaker terminals or on the backs of the speakers. If you done a half-ass job of wiring up then this is the most likely cause.



If you can\'t find bad/frayed wiring, then disconnect all the speakers out the back of the amp. Switch the amp on. Does it trip out? If no, that\'s good. Turn up the volume. Is it still okay? If yes, that\'s good. You haven\'t yet killed the output transistors. If it goes in to protect though, ut oh. It\'s Repair Shop Time.



If the amp is okay, then power off and add one speaker. Power on with the volume down. If it trips either at no volume or when you increase the sound, then you got a bad speaker and you just found it. Repeat the process, adding one speaker at a time. Make sure you put Vol to minimum and power off each time before adding the next speaker.

Sep 14, 2014 | Sherwood Rd-7405hdr 7.1-channel 70-watt...

1 Answer

HK 3380 Receiver - Power turns ON, then within a few seconds displays a PROTECT mode and immediately shuts off. I have checked speaker leads for shorting, etc. This unit was operating perfectly and then...


It seems that one (or both) of the power amps are defective. To have a quick check, take a meter, sett it on the DC voltage and measure the outputs, one by one (with no speaker attached and no signal) for the short time when the unit stays on. If you have high DC voltage on the outputs (one or both) this means that channel(s) needs repairs (most likely the power transistors are blown). If one of the paired transistors is gone you need to replace both of them anyway.
Good lock
Kostiko

Sep 21, 2011 | Harman Kardon HK 3380 Receiver

1 Answer

How do you switch the behringer 3000 to bridged mode,what settings do you use to get 1200 watts out of it.


Well... you probably won't like this, but here is some info: In bridged mode, a different Speakon to speaker cable is required from only the B... it is wired differently and you can only use one of the plugs. The speaker or speaker system CANNOT be less than 8 ohms in bridged mode... this precludes using speakers in parallel or multiple speakers that are less than 16 ohm impedance... such speakers are NOT commonly available as most are either 4 or 8 ohm. There is a slide switch for bridged mode on the face of the mixer. Next thing you won't like... The 1200 Watts specification is PEAK power, NOT RMS... You can get 400 watts RMS per side USING 4 ohm speakers. If you use 8 ohm speakers, each of those will get 200 watts. I use this mixer myself and ALSO repair them. The voltage swing at the outputs is about +/-60 volts MAX (peak). This is about 40 volts RMS by the time the circuit LOSSES are taken into account. Across a 4 ohm speaker you get 10 amps times the 40 volts or 400 watts. Across an 8 ohm you get 5 amps or 200 watts. The voltage rails in the switching amp are +/-70 volts DC so these are reasonable values. Bridged mode just uses both sides of the amp driven in opposite directions for higher voltage out BUT you have to use no less than a single 8 ohm speaker so there is NO advantage to bridged mode power wise. IF YOU NEED more power, use extra speakers from an additonal amp driven by the 1/4 TRS mains output jacks OR use additonal POWERED speakers driven from the same jacks. Please read my tip about the hazard regarding the SLEEVE of the cahnnel A cable when using Speakon to 1/4 plug cables being the HOT and the tip being the cold for channel A. Ground the sleeve accidentally and goodbye channel A amp...

May 10, 2011 | Behringer Pmp3000 16 Channel Audio Mixer

1 Answer

My car subwoofers go IN and OUT frequently as of recently. wires APPEAR to be connected. Are they blown?


The cables from the amp to the speakers could be shorting out, the speaker(s) could be shorting or going bad. The impedance of the speakers could be to low for the amplifier. The amp could be overheating because of any of the above. Turn the power off and try disconnecting one speaker, make sure no bare wires are touching. Reapply the power and observe. If it still does it , reconnect the speaker and preform same test to the other channel. The previous test can determine the side that has the problem. If the problem is still present the speakers and cables need to be checked with an ohm meter. If the cables and speakers check out then the amp speaker outputs need to be checked to see if there is any DC voltage present. If DC voltage is present on the outputs then the amp output section needs to be repaired.

Jun 21, 2010 | Diesel Audio NSX-1422 Car Amp

1 Answer

CROWN CE1000- slips into fault immediately after connection


if ur output power amp is defective u will have that problem - meaning the moment u connect load across it it will go into circuit protection to limit/stop excessive output current. make sure the speaker terminals are connected to +/- output terminals. in bridge mode use only channel 1 and that too with 4 ohms speaker only otherwise amp will clip. considering all connections are okay if it still clips when speaker is connected, u have a faulty power amp section. this the way ur amp is designed

Apr 05, 2010 | Crown CE1000 2-Channel Amplifier

2 Answers

How many watts is it


http://www.kenwoodusa.com/UserFiles/File/Global/Consumer/Manuals/kac528.pdf

Page 7 of the manual gives you all the different configurations of this amp, and it's MAX power. FYI; Kenwood rates their amps at MAX power, not clean. Hope this helps.

Sep 30, 2009 | Kenwood KAC-628 Car Audio Amplifier

1 Answer

I have a phonic powerpod 7. the speaker connections are A & B main 1 & the same main 2 in the middle there is 1 1/4 jack socket that says bridge. it says dont connect any speakers to a or b when...


In bridge mode, the left and right amplifiers are in essence connected together. Typically, the speaker connections are to the positive connectors for each channel for this mode. WIth the speakers still connected, you essentially shorted the outputs to ground and smoked the output section. The unit will detect this now and not turn on the output section. Your unit is in what is usually called "protect" mode. This unit will require repair. Expect to have the output transistors replaced at the very least. I would estimate around $16-$40 for parts.

Dan

Jul 01, 2009 | Audio Players & Recorders

1 Answer

Soundcraftsmen MA5002A ( B channel is dead)


Each of the output transistors should have numbers/letters silkscreened on them. Post the markings here and I can give you the entire part numbers.

Dan

Apr 14, 2009 | Audio Players & Recorders

2 Answers

No sound from speakers


In most recivers or amps yes if there is a short in one channel all the amps go into shutdown or into the protect mode. Now if you know how an amp works then you should be able with a schematic to find out what amp is causing the over load simply by see in the schematic where the speaker output is on the curcuit and then measure for a DC B+ . Thats the amp you would disconnect to conferm that all the others were ok as an output on an amp curcuit shouldnt have more then .3 to .8 volts dc unless its unbalanced.. Seek a pro to assit you if you dont have the equipment to test the amp and for sure get a service manual or schematic diagram. Good Luck

May 16, 2006 | Kenwood VR-5080 Receiver

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