This post concerns the original 424, the white or grey or beige coloured one, also referred to as the Mark one, MK I, M1, original gangster. I ahve manuals for the other versions of the 424 in other blog posts. Here is the .pdf file forthe Tascam 424 Service manual with schematics free download, approximately … Continue reading Tascam 424 Service Manual, Schematics & Owner’s Manual →