MARK IV: Documents
Documents
Start with the manual
Operation and maintenance manual (OS3-298, 4th edition, December 1997)
Covers MX-5050 MKIV-2, BIII-2
Also includes transport adjustment, audio alignment, parts and schematics.
Operation and maintenance manual (OS3-298, 3rd edition, May 1992)
Covers MX-5050 MKIV-2, BIII-2
Also includes maintenance, parts lists and schematic diagrams.
Service and repair
Service training binder
Covers the whole MX-5050 line
Service bulletin: DD capstan motor lubrication (June 1989)
Specifications and sales
MX-5050 Series data sheet (OA-321C, 1991)
Covers the whole last-generation line — MKIV, BQIII and BIII, two through eight channels
Period press
Browse all 5 MARK IV Period Press sightings →Wanted
Manuals for the MKIV-4, MKIV-8 and BQIII
OS3-298 covers the MKIV-2, MKIV-2E, BIII-F, BIII-2 and BIII-2E — five machines behind a cover naming two. It lists the MKIV-4 and MKIV-8 in its family table too, but does not cover them: the half-inch four- and eight-channel desk-tops, and the upright quarter-inch four-channel BQIII, have no factory manual on this site.
MKIV-2/BIII-2 manual, first and second editions (OS3-298)
The third edition, printed May 1992, and fourth edition, printed December 1997, are held here. The first and second editions of OS3-298 are still wanted.
Have one? Here is how to contribute.