Digi Sm320 Service Manual
Blurry barcodes, fading print, or constant paper jams usually point to a mechanical printer issue rather than a software glitch. Cleaning the Thermal Print Head (TPH) Turn off the scale entirely. Open the side cassette door and remove the label roll.
| Category | Specification Details | | :--- | :--- | | | 3/6 kg, 6/15 kg, or 15/30 kg | | Display Resolution | 1/3000 | | Display Types | Operator (CU) : Tare, Weight (5 digits), Unit Price (6 digits), Total Price (7 digits) Customer (OP) : 202x32 px FSTN LCD with backlight | | Memory Options | Standard: 2 MB (~8,300 PLUs); Upgradable: 4 MB (~18,000 PLUs) or 8 MB (~38,000 PLUs) | | Preset Keys | SM-320B : 32 keys (bench model) / SM-320P : 56 keys (pole model) | | Standard Interfaces | 1x RJ45 (Ethernet), 1x RS-232C, 1x RJ9 (Cash Drawer) | | Optional Connectivity | Wi-Fi (IEEE 802.11a/b/g/n) | | Printer Type | High-reliability thermal head printer with a 203 dpi resolution | | Max Print Width | 56mm | | Max Paper Width | 60mm (for both receipt and label stock) | | Printing Speed | Up to 105 mm per second | | Thermal Head Life | 100 million pulses or 100 km of printing | | Power Supply | Universal AC 100V-240V, 50/60Hz | | Operating Environment | Temperature: -10°C to +40°C; Humidity: 15% to 85% (non-condensing) |
Flip the back to the OFF position to lock the calibration settings. 5. Thermal Printer Maintenance & Alignment
In the fast-paced world of industrial shipping, logistics, and retail, the stands out as a workhorse. Known for its robust build and precise weighing capabilities, this indicator (often paired with a base scale) is a staple in warehouses, packing stations, and shipping departments. However, like any precision electronic instrument, it is susceptible to errors, display issues, and calibration drift. digi sm320 service manual
Use an isopropyl alcohol (99%) swab to gently clean the black heating line on the print head. Allow it to dry completely before reloading media. Adjusting Print Head Pressure
Gently pull the side panel to reveal the label roll tray.
Equipped with RJ45 (Ethernet), RS232 (Serial), and RJ9 (Cash Drawer) ports for flexible integration. 2. Key Sections in the Digi SM-320 Service Manual Blurry barcodes, fading print, or constant paper jams
| Symptom | Likely Cause | Fix | |---------|--------------|-----| | No power LED | Fuse F1 (internal, 3A slow-blow) blown | Replace fuse; check for short on VBAT input | | TX LED blinks but no link | Antenna mismatch or coax damage | Test with dummy load; measure SWR (<2:1) | | Intermittent serial data | Loose terminal block screws | Re-torque; check for cold solder joints on DB9 | | Overheating | Failed thermal pad between PA and chassis | Replace thermal pad (1.5mm, 3W/mK) | | Firmware corrupt | Power loss during update | Use XMODEM recovery via bootloader (hold ‘DEF’ button at power-up) |
The scale cannot get a stable reading. Check for drafts, vibration, or something touching the platter.
The most accurate source for the latest version of the manual. | Category | Specification Details | | :---
When replacing components on the Main PCB, ensure the following core connections are checked:
By combining the information in this article with the official service manual and the collective wisdom of online technician forums, you have all the tools necessary to become an expert on your DIGI SM-320.
If the scale displays incorrect weights or has undergone a load cell replacement, you must recalibrate the unit.
The official is the definitive resource for technicians and maintenance personnel, offering detailed schematics, error code definitions, calibration procedures, and repair instructions.
