Often caused by a loose ribbon cable connecting the main PCB to the display board.

Turn the power switch back on while holding the keys until a memory clear prompt or confirmation beep occurs.

Wait for the stability indicator to light up. Press the [PLU] or [ENTER] key to save. Remove the weights, flip the span switch back, and reboot the scale. 4. Printer Maintenance and Adjustment

The display will show SPAN or a zero-count code.

The Digi SM-320 remains a reliable workhorse when serviced correctly. Regularly cleaning the thermal printer components, monitoring sensor voltages, and keeping calibration parameters sealed will ensure long-term, error-free operation. Always consult your physical copy of the for wiring diagrams, part numbers, and mainboard schematics specific to your exact firmware version.

Assembling the customer pole display involves three key steps: Remove the four stud screws located beneath the scale base.

Before using the service manual, know the device:

Regulates power to the thermal print head elements and controls the stepper motor for paper feeding. Span Calibration Procedure

: Equipped with 1x RJ45 (Ethernet), 1x RS232, and 1x RJ9 for cash drawer support; optional Wi-Fi is also available.

After finishing changes, press the # key to store the settings, or press the Tare ( 去皮 ) key to exit without saving.

: Software-based calibration steps to ensure weight accuracy, often involving specific "SPEC" settings (e.g., SPEC 49 or 150 for interface configurations).

Switch the unit to (Maintenance/Service Mode) using the operational mode key sequence.

If you need to fix, calibrate, or troubleshoot a Digi SM-320, this manual is . Do not rely on intuition; the SM-320 has specific programming lockouts that can only be navigated with this documentation. It is a solid, professional-grade technical resource.

The Digi SM-320 requires standard certified test weights to adjust its span. Ensure the scale is perfectly level using the built-in bubble level before starting. Entering Calibration Mode Ensure the scale is off.

typically covers advanced maintenance beyond the standard Operating Manual . Below is a breakdown of the deep technical content found in the SM-320 series service documentation.