ASR 33 buzzing

[David Collins]

You might want to try moving the keyboard forward and away from the operating lever that connects to it at the back right corner of the keyboard. If the keyboard is pushed too far back on that lever it can load up the mechanism and stall it. 

It will need to be re-aligned to get the keyboard working again but that will need to be done anyway - it's pretty sensitive to movement. 

You should be able to turn the mechanism by hand but it also may need to be loosened up if it hasn't been used for a long time. 

The 33 I restored blew fuses initially and I thought it had a bad start cap. Turns out the start cap had been removed and my unit doesn't seem to need it. Once I rotated it a few times and put grease here and there it ran ok. 

If you can get it to work by turning it by hand while it's buzzing then a bad or missing start cap may be your issue.

David Collins
HP Computer Museum

> On 14 Oct. 2016, at 4:56 pm, Brad H <vintagecomputer at bettercomputing.net> wrote:
> 
> 
> 
> I missed those somehow.. thank you.  Got a lot to learn with this beast!
> 
> 
> Sent from my Samsung device
> 
> -------- Original message --------
> From: COURYHOUSE at aol.com 
> Date: 2016-10-13  10:30 PM  (GMT-08:00) 
> To: cctalk at classiccmp.org, vintagecomputer at bettercomputing.net 
> Subject: Re: ASR 33 buzzing 
> 
> 
> did  you  get the  links  we  sent you  over 
> on the greenkeys  list  for  sources on 33 manuals and paperwork 
> we  sent you?  We did not get an acknowledgment.  thanks  
> Ed#  www.smecc.org 
>  
> 
> In a message dated 10/13/2016 4:37:20 P.M. US Mountain Standard Time, 
> vintagecomputer at bettercomputing.net writes:
> The 
>  buzzing definitely seems to be coming from the motor.  I put a 
>  plastic
> tool to the casing and could feel it vibrating. However, I can turn 
>  it by
> hand (clockwise) and see all the gears and striker mechanisms 
>  working.
> 
> It did manage to work briefly yesterday.. it did kind of a 
>  'reset'.  But
> yeah.. not today.
> 
> -----Original 
>  Message-----
> From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf 
>  Of Paul Koning
> Sent: Thursday, October 13, 2016 4:28 PM
> To: General 
>  Discussion: On-Topic and Off-Topic Posts 
>  <cctalk at classiccmp.org>
> Subject: Re: ASR 33 buzzing
> 
> 
>> 
>  On Oct 13, 2016, at 7:14 PM, Brad H 
>  <vintagecomputer at bettercomputing.net>
> 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.
> 
>     
> paul
>