MX-5050BII
from 1981 · ¼″ ½-track 2-channel (BII-2) · ¼″ ¼-track 2-channel (BII-4) · ¼″ full-track mono (BII-F) · ¼″ DIN (BII-2E). Dashed cards are wanted.
1 document held, 1 wanted.
Otari's combined book for the BII series, and a complete one: general information, installation, operation, preventive maintenance, amplifier adjustments, transport maintenance, performance testing, P.C.B. assemblies and parts lists, exploded views, and a full set of circuit diagrams. Ten sections over 116 pages. Table 1-1 covers all four machines — BII-2, BII-4, BII-F and the DIN BII-2E — and Section V documents the factory conversion from 15 and 7½ ips to 7½ and 3¾.
This book is also the answer to a small mystery. A 22-page PDF circulates under the filename otari_mx-5050_ii_2_schematics.pdf, which reads as the 1977 Mark II-2 and is not: it is this manual's Section V block diagram and timing chart, its Section VIII board layouts, its Section IX exploded views, and its Section X schematics, lifted out and rebound as a single file. The five schematic sheets in it — A10620B and A10680C rec and repro amp, PB-46Q control, PB-46R timer drive, and the transport wiring diagram — are pages 10-2 to 10-6 here, in that order.
Two copies below. The first has a text layer and is searchable; the second is the image original at ten times the size and slightly better on the drawing sheets. 116 pages either way.
Provenance: mirrored from the Internet Archive.
The instruction manual on this page is Otari's combined book: operation, alignment, transport maintenance, parts lists and circuit diagrams in one binding. What is not here is anything Otari issued beyond it — a service bulletin, a revision notice, an addendum sheet, or a later edition than the sixth. If you hold BII paper that is not this book, it is wanted.
Wanted — not yet held. Have one? See how to contribute.