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Digi SM-720 - Service Manual

Digi SM-720
158 pages
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COPYRIGHT © 2006 TERAOKA WEIGH-SYSTEM PTE LTD
SERVICE MANUAL
DIGITAL COMPUTING PRINTING SCALE
SM-720
Edition 5

Table of Contents

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Digi SM-720 Specifications

General IconGeneral
BrandDigi
ModelSM-720
CategoryScales
LanguageEnglish

Summary

General Information

Model Specification

Detailed specifications for various SM-720 scale models, including dimensions and capacity.

Operating Specification

Technical parameters for scale operation, including power source, frequency, and environmental conditions.

Type of Interface

Communication interfaces available for the scale, such as RS232C, PS2, and Ethernet.

Overview of SM-720 Scale

Dimension (in mm)

Physical dimensions for different SM-720 scale configurations, illustrated with diagrams.

Key sheet Layout

Explains the layout and function of the scale's keypad, showing different key configurations.

Panel Layout

Describes the layout of the scale's control panel and indicators, including status lights.

Span Switch Configuration

Span Switch Jumper Setting

Step-by-step guide to change span switch jumper settings for scale configuration.

Span Switch Location

Indicates the physical location of the span switch on the scale's main board.

Initial Setup Procedures

Pole, Bench, and Elevated Type Setup

Setup procedures for Pole, Bench, and Elevated scale types, including assembly and settings.

Touch Pole, Bench, and Elevated Type Setup

Setup procedures for Touch Pole, Bench, and Elevated scale types, including network.

Hardware Testing & Maintenance

Testing Pole, Bench, and Elevated Types

Hardware testing procedures for Pole, Bench, and Elevated scale types.

Scale Adjustments

Adjustment procedures for scale sensors, printing position, and other settings.

Safety Information

General Safety Precautions

Essential safety instructions for operation, power, and handling to prevent electric shock and injury.

Explosion Risk and Battery Disposal

Warnings about battery replacement, explosion hazards, and proper disposal procedures.

Safety Regulations

FCC Interference Statement

Statement regarding compliance with FCC rules for digital devices and potential interference.

FCC Radiation Exposure Statement

Information on FCC RF radiation exposure limits and compliance requirements.

Key Hardware Components

Major Component Descriptions

Lists and describes major hardware components like CPLD, motor driver, and memory devices.

Key Sheet Layout Details

32 Preset Keys Layout

Illustration and explanation of the 32-key layout for the scale keypad.

56 Preset Keys Layout

Illustration and explanation of the 56-key layout for the scale keypad.

100 Preset Keys Layout

Illustration and explanation of the 100-key layout for the scale keypad.

Key Panel Layouts

Symbol Key Panel

Illustrates the Symbol Key Panel layout and its functions.

Standard Key Panel

Illustrates the Standard Key Panel layout and its functions.

Key Functions Explained

Data Entry and Processing Keys

Explains keys for data entry, PLU, voiding, and multiple product registration.

Output and Control Keys

Explains keys for printing, feeding labels, and selecting operating modes.

Display Panel Layout and Indicators

Display Panel Types

Illustrations of panel layouts for different LCD types (Small and Large).

Display Panel Indicators

Explains the meaning of various indicators on the display panel, such as NET, P, R, X, S, Z.

Default Country Specification Setting

Method 1 for Country Setting

Procedure for setting default country specifications using specific key presses.

Method 2 for Country Setting

Alternative procedure for setting default country specifications.

Scale Calibration Procedures

Zero Point Calibration

Steps to calibrate the zero point of the scale.

Capacity Weight Calibration

Steps to calibrate the scale using a known capacity weight.

User Specification Setup

Item Barcode Selection Setup

Procedure for selecting item barcode formats and related settings.

Right Side Data Options

Options for displaying price data on the right side of item barcodes.

Weigh & Measurement Specification Setup

Price Base for Weighed Items

Setting the price base for calculating prices of weighed items.

Auto-Zero Function Configuration

Configuration options for the scale's auto-zero function.

Specification Settings

Display Type Selection

Options for selecting the scale's display type.

Unit Price Decimal Point Shift

Settings for shifting the decimal point of unit prices (left/right).

Touch Screen Model Setup

Default Country Specification Setting

Procedure for selecting the country specification via the touch screen.

Calibration Procedure

Steps for performing weight calibration on touch screen scales.

User Specification Setup

Navigating menus to access and modify user setup options.

IP Address Setting

Procedure for setting the scale's IP address via network communication settings.

Hardware Testing for Pole, Bench, Elevated Types

RAM Read and Write Test

Procedure to test the scale's RAM for read and write functionality.

SIO Loop Back Test

Testing the RS232 port using a loop-back connection.

ROM Checksum Test

Verifying the integrity of the ROM via checksum calculation.

PLU Generator Test

Procedure to test the PLU generator function.

Internal Count and Span Switch Status

Internal Count Mode

Procedure for accessing and operating the internal count mode.

Span Switch Status Check

Procedure to check the current status of the span switch.

Scale Adjustments

Sensor Location and Sensitivity

Locating gap and peel sensors and adjusting sensitivity.

Label Gap Sensor Adjustment

Adjusting the variable resistor for label sensor sensitivity.

Peel Sensor Voltage Setting

Adjusting peel sensor voltage for optimal performance.

Printing Position Adjustment

Process for adjusting vertical printing alignment.

Hardware Testing for Touch Models

Memory (RAM) Test

Procedure to test the scale's memory (RAM) for read/write errors.

SIO Loop Back Test

Testing the RS232 port using a loop-back connection.

RS485 Loop Back Test

Testing the RS485 port using a loop-back connection.

Internal Count Mode

Procedure for accessing and using the internal count mode.

Touch Model Adjustments

Peel Sensor Setting Procedure

Steps to adjust the peel sensor for proper label detection.

Gap Sensor Setting

Procedure to adjust the gap sensor voltage for label detection.

Label Printing Layout Setting

Setting the print position and feed adjustments for labels.

Date and Time Setting

Procedure to set the scale's date and time parameters.

Maintenance Procedures

Thermal Head Cleaning

Procedure for cleaning the thermal print head to ensure print quality.

Basic Scale Maintenance

Instructions for cleaning the scale's exterior surfaces and platter.

Thermal Head Cleaning and Replacement

Steps to remove the thermal head for cleaning or replacement.

Mainboard and Display Configuration

Mainboard Jumper Settings

Jumper settings for different LCD display types on the mainboard.

Customer Display LCD Shift

Procedure to activate and shift between new and old customer display LCD types.

Machine Conversion and Sealing Methods

Linerless Machine Conversion

Step-by-step guide to convert the machine for linerless operation.

Sealing Methods

Method of applying sealing screws or stickers to various scale models.

Exploded Views of Scale Types

Pole Type Exploded View

Exploded view diagram for the Pole Type scale configuration.

Bench Type Exploded View

Exploded view diagram for the Bench Type scale configuration.

Hanging Type Exploded View

Exploded view diagram for the Hanging Type scale configuration.

Disassembly Procedures

Pole Type Disassembly

Step-by-step instructions for disassembling the Pole Type scale.

Pole and Bench AD Board Disassembly

Steps for removing the AD board from Pole and Bench type scales.

Pole and Bench Load-cell Disassembly

Steps for removing the load-cell assembly.

Pole Display Disassembly

Instructions for disassembling the pole-mounted display unit.

Bench Display Disassembly

Instructions for disassembling the bench-mounted display unit.

Extra Bracket Disassembly for 30 Kg

Procedure for disassembling extra brackets on 30Kg models.

Hanging Type Disassembly

Step-by-step instructions for disassembling hanging scale models.

Hanging Type Keyboard Disassembly

Instructions for disassembling the keyboard on hanging scales.

Hanging Type Display Disassembly

Steps for disassembling front and rear display units on hanging scales.

Firmware Upgrade Procedures

Bootloader Downloading

Procedure for downloading the bootloader to the scale using Flash Development Toolkit.

Firmware Downloading via Hyper Terminal

Step-by-step guide to download firmware using Hyper Terminal.

Wireless LAN Kit Installation and Configuration

SM-720 Standard Machine Installation

Installation steps for the internal wireless LAN kit on standard SM-720 models.

SM-720 Touch Screen Machine Installation

Steps for installing the wireless LAN kit on touch screen models.

RF Bridge Configuration Setup

Setting up the RF bridge configuration for server mode.

Hanging Scale WLAN Installation

Instructions for installing WLAN on hanging scale models.

Hanging Scale WLAN Bridge Configuration

Refers to the WLAN bridge configuration setup instructions.

Miscellaneous Information

Error Messages

List of error codes, messages, and their potential causes.

PS2 Keyboard Correspondence

Mapping of PS2 keyboard keys to SM-720 functions.

ASCII Characters Table

Table of ASCII characters and their HEX values for input.

TERAOKA Code Table

Table of TERAOKA codes and their numerical values for input.

Wire and Connector Information

Ethernet Cable Connections

Explains the use of straight and crossover cables for network connections.

Cash Drawer Option (RJ11)

Details the RJ11 connector used for the cash drawer option.

PS2 Keyboard Option

Pinout details for the PS2 keyboard connector on the main board.

RS232 C and RS485 Wiring

Information on RS232C and RS485 connector types and wiring.

WEEE Treatment and Recovery

Hazardous Material Listing

Lists hazardous materials found in DIGI products for proper disposal.

Battery Location on Mainboard

Shows the location of the lithium battery on the main circuit board.

Block Diagrams

SM-720 EB (SM500 LCD Option) Diagram

Block diagram for the SM-720EB model with SM500 LCD option.

SM-720 DP (SM800 LCD Option) Diagram

Block diagram illustrating the SM-720DP model with SM800 LCD.

SM-720 DP (SM500 LCD Option) Diagram

Block diagram for SM-720DP with SM500 LCD option.

SM-720 EV (SM800 LCD Option) Diagram

Block diagram for the SM-720EV model with SM800 LCD.

SM-720 EV (SM500 LCD Option) Diagram

Block diagram for the SM-720EV model with SM500 LCD.

SM-720 TEB (SM500 LCD Option) Diagram

Block diagram for the SM-720TEB model with SM500 LCD.

SM-720 TEB (SM800 LCD Option) Diagram

Block diagram for the SM-720TEB model with SM800 LCD.

SM-720 TEV (SM800 LCD Option) Diagram

Block diagram for the SM-720TEV model with SM800 LCD.

SM-720 TEV (SM500 LCD Option) Diagram

Block diagram for the SM-720TEV model with SM500 LCD.

SM-720 TP (SM500 LCD Option) Diagram

Block diagram for the SM-720TP model with SM500 LCD.

SM-720 TP (SM800 LCD Option) Diagram

Block diagram for the SM-720TP model with SM800 LCD.

SM-720 BS (SM800 LCD Option) Diagram

Block diagram for the SM-720BS model with SM800 LCD.

Specification List Details

User Specification Settings

Configuration options for user specifications, including barcode formats.

Weigh & Measure Specification - SPEC 600

Setting the price base for calculating weighed item prices.

Weigh & Measure Specification - SPEC 195, 264, 265, 269

Settings for character pages, clerk access, and function key configurations.

Revision Records

Manual Revision History

Records changes made to the manual across different editions and versions.

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