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Old 27th Sep 2020, 6:54 pm   #1
Ted Kendall
Dekatron
 
Join Date: Jul 2008
Location: Kington, Herefordshire, UK.
Posts: 3,658
Default Tascam 122 Mk3 - HG 302

I'm grappling with one of these at the moment - the direct drive motor is playing up, and the routine replacement of the surface-mount electrolytics didn't fix it. When it runs, it's fine, but one time in ten or thereabouts it refuses to start unless the flywheel is poked with a stick. This doesn't seem to be a dead spot as such, as it happens in several positions of the flywheel. The cassette compartment switch is OK and has been cleaned. Next suspect is the Hall effect sensors, yclept HG 302. The only data sheet I can find for it gives little information save to state that the output is between 50 and 75 mV, which is tiny compared to other sensors, and I can find neither suppliers nor equivalents. Anybody here have either, or more information?
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