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Where is the mains fuse on an RM20?

 
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yourguitarhero
RM100


Joined: 30 Oct 2009
Posts: 110
Location: Edinburgh

PostPosted: Tue Jun 27, 2017 12:13 am    Post subject: Where is the mains fuse on an RM20? Reply with quote

My RM20 won't turn on.
I am trying to check the mains fuse, but I can't find it.

There are markings for it next to the IEC connector on the back.
However there doesn't seem to be a drawer or anything. I had a look at the back of that bit and it seems like it could be inside a wee black tube but it doesn't seem removable?

Am I being really stupid?
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webrthomson
Donating Member


Joined: 01 May 2012
Posts: 363
Location: Glasgow (UK)

PostPosted: Tue Jun 27, 2017 4:43 am    Post subject: Reply with quote

Hey - the mains fuse is under the square thing with the voltages on it:



There should be a little lip on one side and you can pop a screw driver under there and pop it off (make sure you take a note of what voltage it was set for first - take a picure on your phone is normally best) and simply replace the fuse and put it back in - job done!
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yourguitarhero
RM100


Joined: 30 Oct 2009
Posts: 110
Location: Edinburgh

PostPosted: Tue Jun 27, 2017 5:01 am    Post subject: Reply with quote

That makes a lot of sense.
Must have been having a case of the stupids
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webrthomson
Donating Member


Joined: 01 May 2012
Posts: 363
Location: Glasgow (UK)

PostPosted: Tue Jun 27, 2017 9:22 am    Post subject: Reply with quote

yourguitarhero wrote:
That makes a lot of sense.
Must have been having a case of the stupids


No bother - make sure you lever it from both sides so as not to break it once you get it going Smile
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yourguitarhero
RM100


Joined: 30 Oct 2009
Posts: 110
Location: Edinburgh

PostPosted: Tue Jun 27, 2017 4:55 pm    Post subject: Reply with quote

Yeah, the fuse was all smashed in there.

Do these use the bigger sized fuses? As I had one the right kind but the normal size you get for HT fuses. But it just wobbled about and the amp still wouldn't turn on.
And I tried the (working, small sized) fuse in its holder from my RM50 but again, no power to the amp although the holder fit correctly though maybe isn't reaching all the way back. Worked again back in the RM50.
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warmachine67
RM20


Joined: 20 Apr 2017
Posts: 27
Location: Alabama

PostPosted: Tue Jun 27, 2017 6:18 pm    Post subject: Reply with quote

I checked my rm22 and it is the smaller fuse, just like the one from your rm50.
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yourguitarhero
RM100


Joined: 30 Oct 2009
Posts: 110
Location: Edinburgh

PostPosted: Wed Jun 28, 2017 6:11 am    Post subject: Reply with quote

Bollocks, maybe I've broken something in the fuse holder
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