Question about Mackie SRM 1801

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Mackie SMR 1801 module

I turned on the mackie SMR 1801 and the light red/power work and the other light indicted ok but the relay do not switch on and if i touch the inner line the OL light pop on and the green light indicanting signal the aplifier do not worh because the relay never switch on. I chaged the DIODES FDP 33 and the problem continue.

Posted by Anonymous on

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Posted on Jan 02, 2017

  • 5603 Answers

SOURCE: Where is the fuse on the mackie 1801.....there is

There are more than one fuse and they are internal. Replacing the fuse without fixing the cause MAY result in causing more damage to components. The fuse is inside to force one to open the box to repair.

Here is schematic:

http://elektrotanya.com/mackie_swa1801_sch.rar/download.html

Posted on Jan 22, 2011

  • 5603 Answers

SOURCE: 2nd time i went to

Unless you are electronically adept, this is NOT DIY. Take this to a shop.

Posted on Apr 29, 2011

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1 Answer

The OL and THERMAL LEDs turn on quickly after an even very low level signal input.


These subs are renowned for problems. The PSU and the output stages as well as the main driver are all weak and there are a number of companies that will upgrade them and sort out other issues such as vibrations. Assuming it is out of warranty and you really want to use this you would be best going to a specialist repairer to get it sorted not Mackie.

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Hi sorry it was mackie srm 1801 works fine on A out put can I use for time all is working well


Yes, you can use the A output, as long as you're OK with it being a mono system. It may be helpful to read the manual which has a lot of info including possible setup configurations. Here's a link-
http://www.mackie.com/products/srm1801/pdf/SRM1801_OM.pdf

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This will likely be a component level issue. I suggest taking it to the shop. Call and ask them, but some repair guys prefer you pull the amp out to save space in their shop.

Mar 28, 2015 | Mackie SRM 1801

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It is likely that the O/P transistors have blown, especially if the fuse keeps blowing and the O/L led comes on. It's a repair shop jobbie

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Likely the amp blew and the power supply is being overloaded and keeps trying to power on but finds an overload and continues as the power goes away. This is NOT a DIY unless your are electronically adept.

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Where is the fuse on the mackie 1801.....there is no fuse tray at the power cord plug....


There are more than one fuse and they are internal. Replacing the fuse without fixing the cause MAY result in causing more damage to components. The fuse is inside to force one to open the box to repair.

Here is schematic:

http://elektrotanya.com/mackie_swa1801_sch.rar/download.html

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