Bob,
 
If it buzzes when first plugging in to AC, its the small electrolytic  capacitor in the UCC-6.  The one closest to the front.  See pics.
 
Mouser has them.  
 
73,
 
Wayne
KB1FDW
 
 
 
 
On 10/05/2023 4:31 PM EDT Bob Patterson <[email protected]> wrote:
 
 

Hi,

Here's a good one for you...

My KSR-33 started making buzzing noise, emanating from the left rear of the machine, with the power switch turned off.  It is also typing randomly with the power switch turned to Local.  But, the printer appears to be typing normally under computer control with the power switch turned to Line.

Does anyone have an idea what's wrong?

I'm not really able to identify exactly which gadget the buzzing is coming from, but it's not the motor. It seems to be coming from the left end of the shaft that the motor drives.

Thanks very much for any help you can provide.

Bob Patterson

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