Question about Marshall MG100HDFX 100-Watt Amplifier Head

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Marshall mg 100hdfx fan

I AM TRYING TO FIND A REPLACEMENT COOLING FAN FOR A MARSHALL MG100HDFX AMP HEAD. CAN'T EVEN FIND ONE ON EBAY??

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  • marty0108 Sep 10, 2009

    thanks for the info..have to take unit apart and see what type of fan is in it. looks like just a few screws at the top will let the electronics drop out in one unit.should be east to access the fan then..the 2 fan idea is a really good one. the cooler the better. i don't have it up past about 3 or so anyway..not giging with it. thanks again..marty

  • marty0108 Sep 10, 2009

    thanks for the info..have to take unit apart and see what type of fan is in it. looks like just a few screws at the top will let the electronics drop out in one unit.should be east to access the fan then..the 2 fan idea is a really good one. the cooler the better. i don't have it up past about 3 or so anyway..not giging with it. thanks again..marty

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Some of the Marshall equipment uses computer size fans and even on occasion the same connection.

Take the bad fan with you to a computer repair shop it will be much cheaper than a marshall part they should be able to help you out

Posted on Sep 09, 2009

Testimonial: "that sounds like the best way to do it..will just take fan to computer shop and try and get a replacement...thanks for the assistance"

  • Project NOMAD
    Project NOMAD Sep 09, 2009

    Just a thought.



    There are fans and there are fans proably wont matter if you are cranking but look out for the ultra quiet ones.

    Also of you can fit more than one anywhere do a push pull with an extra fan one to pull coller air in and the other to push the hot air out



    Makes equipment run a bit better IMHO and also helps keep dust out too !



    If its one of the bigger fans then your next bet is an AUTO shop, dont laugh those things appear on lots of BIG racks and cool the h3ll out of em.

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I was having the same problem and here is a video I found that shows you exactly what to do

http://www.youtube.com/watch?v=fAKdrNAhV5w

Posted on Feb 16, 2011

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2 Answers

My amplifier keeps going silent every couple of minutes


Try cooling or warming it to see if it stays on for more time(for cooling) or lower (for warming)...
If it does maybe the final stage of amplification (havent seen the scematics to tell you the exact component) must be overheating and stop its operation for safety and don't burn itself...
You should check the power supply for correct voltages and if they are correct change this chip with a new.
DONT change the IC before checking the psu because it may broke the new one too..

Mar 11, 2012 | Marshall MG100HDFX 100-Watt Amplifier Head

1 Answer

Marshall MG100HDFX, VERY loud painful humming/noises as soon as the amp is turned on. Cant be adjusted by volume or anything, is this a connection problem?


Likely the filter capacitor(s) have failed OR the power amp has shorted driving DC with ripple into your speaker (very bad). Take it for repair before damage might be done.

Jan 10, 2011 | Marshall MG100HDFX 100-Watt Amplifier Head

1 Answer

No head!


They were designed to be used with the Marshall MG100HDFX heads.

Jun 30, 2010 | Marshall MG100HDFX 100-Watt Amplifier Head

1 Answer

IS IT HARD TO REPLACE COOLING FAN .MG 100 HDFX?


Hardest thing is getting the chassis out past the Tolex covering. Sometimes it catches and you have to use a knife blade to hold it out of the way.

Make sure to use an identical fan with identical ratings. Some of these are throttled depending on sensed heat. For those, an exact model fan should be used.

May 09, 2010 | Marshall MG100HDFX 100-Watt Amplifier Head

1 Answer

My marshall mghdfx head fan makes noise when you first turn it on. what is this?


Some cooling fans are "throttled" depending on the sensed temp... these CAN be noisy upon initial startup.

It can also be bearings going out... best plan is to watch it and see if it gets worse.

Changing a fan is fairly easy. You have to observe the polarity of the connections. Replace with identical unit.

May 09, 2010 | Marshall MG100HDFX 100-Watt Amplifier Head

1 Answer

Dear experts, i have a MG100HDFX and no sound seems to come out. i replaced the burnt fuse inside the head and i disconnected the timer for the cooling fan cuz thats what kept blowing the fuse. With the...


The problem is not likely to be the fan. I would suspect the output section of the amp to have a problem. These units use a 15 leg power IC for the output. Look for a small IC attached to the heatsink. It will be marked TDA7293V. This is the likely defective part.

Dan

Jan 07, 2010 | Marshall MG100HDFX 100-Watt Amplifier Head

1 Answer

Cooling fan ,heat sink MG100HDFX does fan blow out or **** cool air in? Someone left it unassembled..


If you can get two IN then do it but make sure one is pushing air out and the other sucking in.

Feb 01, 2009 | Marshall MG100HDFX 100-Watt Amplifier Head

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