Question about Mackie SWA1801 Subwoofer

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My SWA1801z Amp heats up like crazy. You can burn your fingers if not careful. That's not good for the components I believe. The sound is not that loud from the cabinet and might be more than alittle distorted.

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If the SWA1801z Amp heats up like crazy, and

he sound is not that loud from the cabinet and might be more than a little Distorted,

then check for VAS circuits.

Could be failing transistor

On the circuits above.

Posted on Oct 26, 2012

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Change the audio amplifier IC

Posted on Jul 13, 2009

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1 Answer

Unit was clipping out @ high volume.


First of all, I would need to know the make and model number, rather than guessing. Second question, why are you driving the amp into clipping, if that's what you mean? That will destroy tweeter and midrange drivers. Certainly, if you are driving it into clipping, the heatsinks have got to be hot, and I don't believe an external fan will cool the right places. If you can get back to me with more information, you can contact me at my website, audioserviceclinic.com, to inquire about a repair. Thank you.

Nov 27, 2014 | Audio Players & Recorders

1 Answer

Won't heat, sounds and looks fine


The Titanic looked fine! :) You have blown a fuse. Check inside the oven chamber and look for missing powder paint or signs of arcing, if so there is a paint to repair microwaves for this issue or else just dispose of the microwave. If the inside is good remove all the screws and remove the cover. Replace the fuse. If the magnetron was making louder noises prior then replace the magnetron. Since the fuse went the giant capacitor is likely bad. While the cabinet is open make sure to look for burned wires, check the continuity of thermal cutoffs, and check the main circuit-board for burned traces or components. The relays in most electronics are known for arcing (spot welding) and staying in the wrong position. Tap them hard with the back end of a screwdriver. During all of this use safe electrical practices by having the power cord unplugged. The capacitor could still have a high charge on it so be careful.

Dec 01, 2013 | GE XL1800 1100 Watts Microwave Oven

1 Answer

I'm a student training to be a tech. Today I'm working on an Acer Aspire 5920 series and it's not taking power at all. No LEDs flash...nothing. While troubleshooting it I noticed an audible *popping*...


The DC jack, where you plug the power adapter cable, might be loose or defective, & needs to be either re-soldered or replaced.
In order to do this, the laptop needs to be disassembled & the motherboard taken out. Also, the motherboard needs to be checked for defective/burned out components in the area near the DC jack. Any defective/burned out components found should be replaced, or you might need to replace the laptop's motherboard altogether.

Sep 16, 2010 | Acer Aspire 5920-6727 Notebook

2 Answers

What problem occour when unit take high ampere.


When a unit starts to draw high amps, you start loosing motors, the compressor ect. If there is a problem with one of the componants, it will over amp and cause it to burn out. Each motor has a factory set amp rating on it and as it gets older and worn, it draws more current causing it to over heat and finally give out. It is important to have the unit serviced to keep the unit running as good as new. That is what occurs, burned out motors.
Sincerely,
Shastalaker7
A/C, Heating, & Refrigeration Contractor

Aug 16, 2010 | LG Heating & Cooling

1 Answer

I have a Norcold 9000. It works fine on electric & propane, but will not keep cool on battery power.


Have you tested for 12 vdc at terminals where element is connected to board? If yes, and 12vdc is present, then I'd pull element out and bench test it carefully. Just let it cool down, and attach 12vdc from a battery or other source to it and see if it heats up. Careful not to burn your fingers or hand when feeling outside of element for heat. If no heat felt, replace it.

Jun 01, 2010 | Thetford Norcold RV Cooler/Freezer

1 Answer

Aeg d5701-4 bottom oven slow to heat up and does not reach set temperature fan works


It sounds like the oven element is not working.
To check it, remove rear panel in oven compartment, after running it for a few minutes, it should be very hot to the touch, BE CAREFUL, DO NOT BURN YOUR FINGERS.

Apr 21, 2010 | AEG D5701-4 Electric Double Oven

2 Answers

Amp wont turn on, but i hear a pop when turning off


first off nothing should pop when turned off next it could be a grounding problem external or internal or worse an audio output problem take a volt meeter and turn key to on check the ground and positive on the amp should read 12 to 14 volts do same with ground and remote wire if these both read correct remove the back set your meeter to the diode setting the audio outputs are usually the larger ones but sometimes not take your leads and touch out side legs then to the outside to center try each one every way you can switching leads if at any time the buzzer stays on or goes to flat 0 then that output is bad if all check good i would go through the car making better connections and cleaning up any wires that might seem to be faulty maybe even replace your RCA cables
im running 18 speakers and 8 amplifiers in my car and i have done this several times :( but i don't pop unless something is wrong hope this helps

Jul 24, 2009 | Line 6 Spider Iii 30

1 Answer

Only half of the wicks burns/ flame varies in height/ smokes !


Sounds like you have a wick that has burnt unevenly in the past and now there is not a good setting for an optimum burn. Either the wick needs to be trimmed even or you need a new wick.

Nov 14, 2008 | Heating & Cooling

1 Answer

How to open SWA1801Z


Please follow the guide given in the link.. there is a chapter on woofer replacement..


http://www.mackie.com/pdf/repair/SWA1801z%20repair%20guide.pdf

--please give your comments..

have a good day
sree

Jul 01, 2008 | Mackie SWA1801 Subwoofer

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