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Old 10th Aug 2022, 4:13 pm   #31
DMcMahon
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Location: Worthing, West Sussex, UK.
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Default Re: Sony TC-645 1/4 Track R2R Erase Head & Issues

Quote:
Originally Posted by DMcMahon View Post


To me it is the Motor Auto Stop lever (left hand side on the 377/399) that is preventing (probably not intentionally) the tape getting closer/touching the left hand side of the erase head. The lever is linked to the long dog legged lever on the rear of the Head Deck Assembly where its pivoted weight attempts to push the Auto Stop Lever upwards with the tape tension contacting the Auto Stop Lever stopping the Auto Stop Lever going too high.

If I push the Auto Stop Lever upwards (so it no longer contacts the tape) then the tape moves up and makes light contact with the left hand side of the erase head.

David
My description above is a little inaccurate. The lever that I am calling the Auto Stop Lever is the dog eared lever on the Head Deck Assembly, this is the lever where its vertical section makes contact with the tape, the lever is also mechanically coupled to the short lever that actuates the Motor stop microswitch.

David
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