ASR 33 buzzing

Paul Koning paulkoning at
Thu Oct 13 18:28:07 CDT 2016

> On Oct 13, 2016, at 7:14 PM, Brad H <vintagecomputer at> wrote:
> Posting around hoping somebody might be able to point me in the right
> direction.  I tried greenkeys but no response.
> I have an ASR 33 I got.  When I plug it in on Line mode there is a clicking
> in the power supply area and nothing else.  If I put it to Off or Local,
> there is a loud buzzing sound and eventually a 2A fuse on the back left side
> of the machine blows.  It's like something's stuck but the noise is kind of
> hard to pin down.  Wondering if there's any Model 33 experienced guys out
> there. :)

Given the blown fuse I'd suspect a stuck mechanism, so the motor is stalled and you're getting overcurrent.  Try turning the motor by hand to confirm.


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