This service manual for the Olympus OM-4 camera provides step‑by‑step procedures for inspection, disassembly, reassembly, adjustment, and diagnostic testing. It also includes a comprehensive list of tools, exploded parts diagrams, and wiring/circuit diagrams for both early (ROM 1) and later (ROM 4) versions.
The manual lists the camera's main specifications, such as TTL auto‑exposure, film format, lens mount, shutter speeds, viewfinder magnification, dimensions, and power requirements, helping technicians understand the device before performing repairs.
| Camera type | TTL auto‑exposure SLR camera |
|---|---|
| Film format | 24 mm × 36 mm |
| Lens mount | Olympus OM mount |
| Maximum shutter speed | 1/2000 sec |
| Synchronization | X contact at 1/60 sec or slower; hot shoe |
| Light measuring range | 0 EV to 19 EV (ISO 100, 50 mm at F1.4) |
| Film sensitivity | ISO 6 – 3200 |
| Viewfinder magnification | 0.84× at infinity with -0.15 diopter and 50 mm lens |
| Dimensions (body only) | 136 mm × 84 mm × 50 mm |
| Weight (body only) | 540 g |
It uses two silver‑oxide SR44 batteries or alkaline‑manganese LR44 batteries.
The camera can reach a maximum shutter speed of 1/2000 seconds.
The viewfinder provides 0.84× magnification at infinity with a -0.15 diopter correction and a 50 mm lens.
The body measures 136 mm wide, 84 mm high, and 50 mm deep.