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Locate the calibration switch (usually a micro-switch hidden under a sealed plate beneath the scale base or via a specific key combination during boot-up, such as holding the [RERE] or [TARE] key while switching on the power).
If you require an official technical service manual for warranty or complex repairs, you can contact DIGI Europe Support +44-(0)3450-609010 or visit the DIGI Global Contact Page to find a local distributor. DIGI (TERAOKA) wiring diagram for your SM-320 unit? digi sm320 service manual
Gently flip the scale back up and separate the upper housing from the base chassis, taking care not to pull the display and keyboard ribbon cables.
The Digi SM-320 service manual outlines specific error messages to help isolate hardware or software faults rapidly. Error Code / Symptom Likely Cause Recommended Corrective Action Load cell mechanically jammed or drifted. This public link is valid for 7 days
4-wire or 6-wire shielded cable carrying the excitation voltage and returning the microvolt signal.
Mount the adhesive label roll onto the primary supply spool. Can’t copy the link right now
Weight on platter exceeds max capacity; or load cell is structurally damaged.
If you need to replace a blown fuse, a faulty keypad membrane, or the main PCB, the service manual includes exploded view diagrams. These show you exactly how to disassemble the casing without snapping plastic clips or damaging ribbon cables.