TM848 repair?

Mike Stein mhs.stein at
Mon Jul 13 14:00:17 CDT 2020

Shouldn't be too difficult to troubleshoot; have you got the manual?

Start by checking the 24V > 12V regulator...


----- Original Message ----- 
From: "Jim Brain via cctalk" <cctalk at>
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at>
Sent: Monday, July 13, 2020 2:18 PM
Subject: TM848 repair?

> Anyone on list repair or rehab Tandon TM848 drives? I have a 4 or so of 
> the slimline drives from some Tandy Model 12/16b units that don't seem 
> to spin at all, and I've hooked them up to the same PSU that a TM848E 
> successfully runs on, so I am guessing it's not a PSU issue. (Though, my 
> understanding of 8" drives is extremely minimal, so...)
> If I could get just 2 of them working, that'd put a few 12/16b units 
> back in operation.
> Jim
> -- 
> Jim Brain
> brain at

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