Digi Sm320 Service Manual
The Digi SM-320 is a retail scale designed for high-speed performance and efficiency in prepacking and storefront operations. While specific full-text service manuals for the SM-320 are often proprietary to authorized dealers, documentation and resources from the DIGI SM-series (including the SM-100, SM-300, and SM-120) provide a consistent framework for servicing and maintenance. Service & Technical Overview
The service documentation typically covers the following critical areas for authorized technicians:
Setup and Mode Changes: Instructions for navigating between Registration, Program, X (Read), and Z (Reset) modes to perform maintenance or reporting.
Memory Initialization: Procedures for clearing scale memory (e.g., using specific key combinations like . + Power ON) to reset specifications or clear data conflicts.
Calibration: Software-based calibration steps to ensure weight accuracy, often involving specific "SPEC" settings (e.g., SPEC 49 or 150 for interface configurations).
Connectivity: Technical specs for Ethernet (Coaxial/Twisted Cable) and RS232C interfaces used for linking the scale to POS systems or label printers. Common Service Files & Programming
Servicing the SM-320 involves managing several internal programmable files: DIGI DC-200/300 Service Manual, V1.37
For professional technicians and authorized dealers, a service manual for the DIGI SM-320
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. 1. Hardware Specifications
is a high-speed thermal label/receipt printing scale with a focus on retail and ECR (Electronic Cash Register) functionality. Resolution: 1/3,000. Memory: Standard 2MB (up to 8,300 PLUs), expandable to 8MB.
Interface: Includes 1x RJ45 (Ethernet), 1x RS232, and 1x RJ9 for a cash drawer.
Printer: 203 dpi thermal head; max speed of 105 mm/sec; life span of ~100 km. 2. Calibration Procedure (Span Adjustment)
Calibration should be performed annually or whenever the scale is moved. Accessing Calibration Mode:
Switch on the scale while holding Re-Zero and C to initialize.
Press the Span Switch (physical switch inside or under the unit). Enter "Z Mode" by pressing M, Re-Zero, M, M.
Hold Re-Zero and type the service code 8715 to enter "CALIBRATION MODE". digi sm320 service manual
Weight Testing: Ensure no weight is on the platter and press Total Print (*). Place the required test weight (e.g., 3kg for a 15kg unit) and press Total Print again to set the span. 3. Network & IP Configuration
often requires manual IP assignment for POS system integration.
Manual Setting: Enter the administration page or use the keypad to adjust SPEC 135, which determines the last set of numbers in the IP address.
HEX Format: Note that some DIGI firmware requires the IP to be entered in Hexadecimal (e.g., 192.168.168.X becomes C0.A8.A8.X). 4. Troubleshooting Common Error Codes SM-320 | Retail | DIGI SINGAPORE
Since I don’t have the full official service manual, this “interesting guide” covers the most useful diagnostic, repair, and configuration steps based on common SM320 hardware issues.
7. Where to Find the Real SM320 Service Manual
Digi does not publicly release full schematics, but similar OEM versions are available from:
- Digi Support Archive – request “SM320 Hardware Reference” (PDF, 20 pages, covers jumper settings & connector pinouts).
- Manualslib / ElektroTanya – search “Digi SM320 Service Manual” (user-uploaded; often incomplete).
- Alternative: Get MaxStream XTend manual (same RF engine, different branding).
The SM-320 is a high-speed thermal printing scale available in Options include
202 x 32 pixel backlit FSTN LCD for both operator and customer.
Standard 2MB (approx. 8,300 PLUs), expandable to 4MB or 8MB. Interfaces:
Includes 1x RJ45 (Ethernet), 1x RS232, and 1x RJ9 for a cash drawer. 2. Installation & Assembly SM-320P (Pole version) , the assembly involves connecting the customer display: Remove Studs:
Unscrew the four stud screws located beneath the scale base. Connect Cables:
Securely join the serial cables from the scale and the pole display. Ensure the side latches click to prevent pin damage. Secure Pole:
Align the pole with the fixing locations and reinsert the stud screws. 3. Service & Maintenance Procedures Label Loading:
Gently pull the side panel, open the print head panel, load the label roll onto the spool, and guide the labels through the designated path before closing. Memory Initialization: (Standard for SM-series) Hold while turning the scale ON, then press the total print key three times followed by the (Clear) key. Thermal Head Maintenance:
Clean the thermal head regularly to maintain a 100km life span. To calibrate the head, hold during power-up. 4. Calibration & Mode Settings The Digi SM-320 is a retail scale designed
Service manuals for DIGI SM scales typically require a physical Span Switch to be ON for calibration. Software Calibration:
The SM-320 supports software-based calibration for zero point and span adjustments. Spec Settings: by pressing
in sequence to access machine specifications (like Spec 141 for barcode formatting). 5. Troubleshooting Error Messages
The manual contains a full list of error codes. Common issues often relate to: SM-320 | Retail - DIGI (TERAOKA)
Table_title: Basic Table_content: header: | Model | SM-320 | | | | row: | Model: Capacity | SM-320: 3/6 kg | : 6/15 kg | : | : 15/ DIGI (TERAOKA) Digi SM-300P Scale Repair Guide - Calibration - Scribd
DIGI SM-320 is a high-performance digital printing scale designed for fast-paced retail environments like supermarkets and butcher shops. Maintaining this equipment often requires access to technical procedures typically found in a service manual, including calibration, troubleshooting, and hardware assembly. Core Specifications of the DIGI SM-320 comes in two primary configurations: the (Bench version) and the (Pole version with a raised customer display).
Weight Capacity Options: 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).
Display: A 202 x 32 pixel FSTN backlit LCD showing tare, weight, unit price, and total price.
Printer: High-reliability thermal head with a 203 dpi resolution and 105 mm/sec printing speed.
Connectivity: Equipped with 1x RJ45 (Ethernet), 1x RS232, and 1x RJ9 for cash drawer support; optional Wi-Fi is also available.
Memory: Standard 2 MB (storing up to 8,300 PLUs), expandable to 4 MB or 8 MB. Critical Service Procedures
While specific service manuals are often restricted to authorized DIGI Scale dealers or technicians, common maintenance tasks include the following: 1. Calibration (Weight & Sensors)
Calibration is necessary if the scale shows incorrect weight readings or display errors.
Weight Calibration: Requires access to "Z Mode." For related models like the
, technicians often turn on the span switch and hold Re-zero while typing a specific code (e.g., 8715) to enter calibration. a faulty keypad membrane
Gap Sensor Calibration: To ensure label alignment, users can hit the Mode button until Z1.0 appears, then hold Re-zero and type 516 to view sensor voltage. 2. Hardware Assembly ( Pole Display)
Assembling the customer pole display involves three key steps: Remove the four stud screws located beneath the scale base.
Connect the serial cables from the scale and pole display, ensuring the latches click into place.
Secure the pole to the base using the previously removed screws. 3. Network and Memory Management
Clear Memory: To reset the unit, hold Re-zero and Feed while turning the machine on.
Initialize Network: To reset network settings, hold Re-zero and C during power-up. Troubleshooting Common Issues
Inaccurate Weight: Ensure the scale is on a flat, even surface and free of debris. Printer Jams
: Open the side panel tray and flip the print head panel switch. Ensure the label roll is guided correctly through the path and secured tightly.
Display Issues: Check for loose serial cable connections, especially in the
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)
Important Note: The Digi SM320 is a legacy (discontinued) industrial cellular terminal/server. Digi International no longer produces this model. Official service manuals are proprietary and not publicly hosted on Digi’s main site. This guide teaches you how to work with the manual, where to find remnants, and what procedures it contains.
Verdict: Essential for Maintenance, but Overpriced if Bought New
Overall Rating: 4.5/5 Stars
The Digi SM-320 Service Manual is a high-quality, indispensable resource if you plan on repairing or calibrating this specific scale model yourself. Unlike many modern manuals that are vague, Digi’s technical documentation is thorough and precise.
However, be aware that there is a difference between the "Operator's Manual" (easy to find) and the "Service Manual" (harder to find, protected).
3. Exploded Parts Diagrams
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.
