Sm320 Service Manual — Digi

The Digi SM320 is a highly regarded electronic weighing scale and label printing scale, widely used in retail environments such as delicatessens, grocery stores, and supermarkets. Known for its robustness and reliability, the SM320 is a workhorse device. However, like all electronic hardware, it requires periodic maintenance and occasional repair. The "Digi SM320 Service Manual" is the definitive technical document designed to guide technicians through these processes. This write-up provides an informative summary of what the service manual entails, the technical specifications it covers, and the standard maintenance procedures it outlines.

Press the print head down firmly until it clicks into the locked position. RAM/EPROM Error Corrupted memory or failed mainboard component.

To perform calibration or change legal-for-trade parameters, you must access the physical hardware switches located inside the scale chassis. Locating the Span Switch Turn off the scale and unplug the power cord. Remove the stainless steel platter.

: 3/6 kg (1 g/2 g intervals), 6/15 kg (2 g/5 g intervals), or 15/30 kg (5 g/10 g intervals). digi sm320 service manual

If the scale fails to power on or resets intermittently under load, measure the output voltages on the SMPS wire harness using a digital multimeter:

Use a terminal program (115200, 8N1, no flow control):

: To reset network settings, hold Re-zero and C during power-up. Troubleshooting Common Issues The Digi SM320 is a highly regarded electronic

: Standard interfaces include RS232 , RJ45 (Ethernet) , and RJ9 for cash drawers. Wireless IEEE 802.11a/b/g/n is available as an option.

Usually related to load cell or calibration issues.

When your SM320 starts flashing error codes or refusing to power on, a frantic internet search for a "fix" can lead to dead ends. The most critical tool you need is the . The "Digi SM320 Service Manual" is the definitive

To enter calibration mode, press the Span Switch , then in Z-Mode, hold RE-ZERO and enter code 8715 . Follow the on-screen prompts to place test weights (e.g., 3kg for a 15kg capacity scale) and press the asterisk * key to finalize.

Ensure the scale pan is completely empty. Press the Visual Zero or ∗ (Print/Enter) key. The scale will capture the zero point reference.

For a scale to be legally used in trade, it must be calibrated according to local weights and measures regulations. The service manual contains the "Adjustment Mode" instructions.

Over time, load cells wear out. The SM320 needs recalibration to maintain legal-for-trade accuracy. The service manual provides the secret key sequences (usually holding down specific keys during power-up) to enter technician mode—information never found in the user guide.

For official technical support or to request a full physical manual, you can contact DIGI America Support or DIGI Europe Support . SM-320 | Retail - DIGI (TERAOKA)