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Old 20th January 2015, 04:07 PM   #1
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Default Arcam 6 Plus Amplifier Repair

Hi all,
I have an Arcam 6plus which failed to power up. I took the lid off and noticed that the main power input fuse had blown. I know the very basics of amplifier repair so i checked the continuity of the output transistors and sure enough one side was shorted. I replaced the blown side with new and it then powered up fine so i then adjusted bias for both channels at 4mv.
My problem is that now it still tends to blow the main fuse from time to time (probably 1 in three power ups) but when on is absolutely perfect. It's like there is a big power surge on power up as when looking at a newly fitted fuse as i power up you can see it surge ever so slightly.
Any help would be much appreciated, thank you.
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Old 20th January 2015, 04:44 PM   #2
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What model is Arcam 6 plus? I can't find a schematic!
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Old 20th January 2015, 04:47 PM   #3
Mooly is offline Mooly  United Kingdom
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Sounds like you have fitted non time delay fuse in place of a T or AT type.
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Old 20th January 2015, 04:55 PM   #4
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It's an Arcam Alpha 6 Plus.
The correct fuse is T1A25 and at first i used a non time delay 1A which it blew on second attempt, the only fuse i had to hand was a non time delay 1.6A which it blew on the third attempt. I did think about this but the only time delay fuse i had was a 1A which it blew instantly.
I will try a time delay 1.25 and see if it sorts it.
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