For lab technicians who have lost their physical copy, here is an distilled operational protocol derived from the latest 5402 documentation.
The Eppendorf 5402 is a legacy refrigerated microcentrifuge that has been largely replaced by newer models like the Centrifuge 5420 . While a "solid paper" specifically for an updated 5402 manual does not exist—as the device itself is no longer in production—you can access the original technical documentation and modern equivalents via the Eppendorf Download Center . Essential Documentation & Technical Details eppendorf 5402 manual updated
18 × 1.5 mL / 2.0 mL microcentrifuge tubes For lab technicians who have lost their physical
Turn on the main power switch located on the side or rear panel. Essential Documentation & Technical Details 18 × 1
The full service manual (with circuit diagrams) is not publicly available due to Eppendorf IP. However, the updated User Manual includes an "Authorized Service Provider" section with wiring schematics for the power supply board (Pages 78-82).
Do not use halogenated hydrocarbons, strong acids, or aggressive alkaline solutions for cleaning.