How to fix/replace MG100DFX fan?

ProGuitarStudent · 01-26-2008, 11:56 AM

Hello all. I have an MG100 combo & when I turn it on the fan makes a lot of noise for about 40 seconds or so and then quiets. I have searched the net & found it to be a common problem with the MG series. I have seen comments that some just ignore it (as I have untill now), some hit it with WD40, and some have replaced it. I would like to at least try the WD40 & if that does not work, replace it.

Does anyone know how I get it opened to do that or have any other thoughts/suggestions on the problem? I started to pull some screws out this morning & then backed off & figured I'd try to get some input 1st. Thanks.

MG100 · Yesterday, 09:15 AM

You can wire in a replacement fan easily enough - I sourced a suitable replacement in a shop called Maplin - the equivalent of your Radioshack I'm guessing. As far as I recall you need to to a fan that works on 12V DC. I'll check the exact spec and come back to you. The replacement fan I put in is louder - not a problem since you can;t hear it when the amp is running loud. You need to be careful that the fan doesn;t stop working - the output power amp chip (IC1 on the small PCB) needs the heatsink to be cooled.
Hope this helps
Paul

01-26-2008, 11:56 AM	#1 (permalink)
ProGuitarStudent Junior Member Join Date: Jan 2008 Location: Central NY Posts: 1	How to fix/replace MG100DFX fan? Hello all. I have an MG100 combo & when I turn it on the fan makes a lot of noise for about 40 seconds or so and then quiets. I have searched the net & found it to be a common problem with the MG series. I have seen comments that some just ignore it (as I have untill now), some hit it with WD40, and some have replaced it. I would like to at least try the WD40 & if that does not work, replace it. Does anyone know how I get it opened to do that or have any other thoughts/suggestions on the problem? I started to pull some screws out this morning & then backed off & figured I'd try to get some input 1st. Thanks.

Yesterday, 09:15 AM	#2 (permalink)
MG100 Junior Member Join Date: Dec 2008 Posts: 2	Re: How to fix/replace MG100DFX fan? You can wire in a replacement fan easily enough - I sourced a suitable replacement in a shop called Maplin - the equivalent of your Radioshack I'm guessing. As far as I recall you need to to a fan that works on 12V DC. I'll check the exact spec and come back to you. The replacement fan I put in is louder - not a problem since you can;t hear it when the amp is running loud. You need to be careful that the fan doesn;t stop working - the output power amp chip (IC1 on the small PCB) needs the heatsink to be cooled. Hope this helps Paul

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