There is a small hole in the middle of the large circuit board. The switch doesn't look like a switch, but a little lever...which is green (brown?) as I recall. With the machine turned off, just stick a small screwdriver throught the whole and you can flip the lever.

--- On Tue, 1/18/11, Daniel Roth <[log in to unmask]> wrote:

From: Daniel Roth <[log in to unmask]>
Subject: [ARSCLIST] Otari MX5050 Bii adjust tape speed.
To: [log in to unmask]
Date: Tuesday, January 18, 2011, 1:50 PM

Hello folks,

I need to change the speed setting on my Otari MX5050 Bii-type reel-to-reel deck from 7 1/2 ips to 3 3/4 ips. Currently the unit is set up for 7 1/2 and 15 ips, respectively. I have found instructions on how to do this by opening the unit and manually selecting the alternate position of "Switch S1." However, I cannot locate said switch inside the unit as instructed.

Any insights, comments, diagrams, images, etc. would be appreciated.


Dan Roth
Walter J. Brown Media Archives and
Peabody Award Collection
University of Georgia
Athens, GA