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Sam4s ER-420F User Manual

Sam4s ER-420F
86 pages
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ELECTRONIC CASH REGISTER
C O N T E N T S
ER-420 / ER-420M / ER-420F
ELECTRONIC CASH REGISTER
Manual
1. Precaution Statements
2. Product Specifications
3. Installation and Operation
4. Disassembly and Assembly
5. Maintenance and Adjustment
6. Exploded Views and Parts List
7. PCB Layout and Parts List
8. Troubleshooting
9. Block diagram
10. Wiring Diagram
11. Schematic Diagrams
SERVICE
E
R
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4
2
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ELECTRONIC CASH REGISTER

Table of Contents

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Sam4s ER-420F Specifications

General IconGeneral
TypeElectronic Cash Register
Paper Width58 mm
Memory Capacity8 MB
Cash Drawers1
DisplayLCD
PrinterThermal printer
Cash Drawer5 bill, 5 coin
ConnectivityUSB, RS-232
Power SupplyAC 100-240V, 50/60Hz

Summary

About this Manual

Notes

Describes additional information about items within the manual.

Precaution Symbols

Explains symbols used for safety and ESD precautions.

Copyright

Overview of this ECR

Precaution Statements

Safety Precautions

Details safety, servicing, and ESD precautions to prevent damage and hazards.

Servicing Precautions

Provides precautions for safe and effective servicing of the ECR.

ESD Precautions

Guidelines for handling Electrostatic Sensitive Devices (ESDs) to prevent damage.

Product Specifications

General Specification

Details general technical specifications of the electronic cash register.

Appearance Specifications

Details appearance dimensions and location features of the ECR.

Thermal Printer Specification

Details thermal printer specifications, including model, speed, and format.

Character Specification

Specifies character structure, size, pitch, and number of columns for printing.

Paper Specification

Details recommended paper type, width, diameter, and thickness for the printer.

Power Specification

Details power consumption, input voltage, and output voltage specifications.

Interface Specifications

Details RS-232C and EKLZ interface specifications and cable connections.

Installation and Operation

System Configuration

Illustrates the system configuration with connected peripherals for the ECR.

Installation Procedures

Provides guidance on installing components and connecting peripherals.

Operation Modes

Explains the mode switch functions, keyboard operations, and self-tests.

Disassembly and Assembly

Disassembling the Case Upper Block

Step-by-step instructions for disassembling the upper case assembly.

Disassembling the Case Lower Block

Step-by-step instructions for disassembling the lower case assembly.

Maintenance and Adjustment

Cleaning the Printer Head

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

Exploded Views and Parts List

Exploded View (ER-420M)

Visual representation of the ECR disassembly for the ER-420M model.

Exploded View (ER-420F)

Visual representation of the ECR disassembly for the ER-420F model.

ASS'Y COVER-PRINTER Parts List

Lists parts for the printer cover assembly.

ASS'Y CASE-UPPER Parts List (ER-420M)

Lists parts for the ER-420M upper case assembly.

ASS'Y CASE-UPPER Parts List (ER-420F)

Lists parts for the ER-420F upper case assembly.

ASS'Y PRINTER (STM-320) Parts List

Lists parts for the STM-320 printer assembly.

ASS'Y KBD(48KEY RAISED) Parts List

Lists parts for the 48-key raised keyboard assembly.

ASS'Y CASE-LOWER Parts List

Lists parts for the case lower assembly.

ASS'Y-DRAWER Parts List

Lists parts for the drawer assembly.

ASS'Y HOUSING Parts List

Lists parts for the housing assembly.

ASS'Y LOCK Parts List

Lists parts for the lock assembly.

ASS'Y BOTTOM Parts List

Lists parts for the bottom assembly.

PCB Layout and Parts List

Main PCB Layout

Diagram showing the layout of components on the main PCB.

STM-320 Printer PCB Layout

Diagram showing the layout of components on the STM-320 printer PCB.

Power Switch PCB Layout

Diagram showing the layout of components on the power switch PCB.

Display Layouts

PCB layouts for front and rear displays (VFD).

Fiscal Layout

Diagram and parts list for the fiscal PCB.

Interface Layout

Diagram and parts list for the interface PCB.

Troubleshooting

Power Problem

Troubleshooting guide for power-related issues in the ECR.

System Problem

Troubleshooting guide for general system failures and CPU issues.

VFD Display Problem

Troubleshooting guide for issues with the VFD display.

Thermal Printer Problem

Troubleshooting guide for problems with the thermal printer.

Key Board Problem

Troubleshooting guide for issues related to the keyboard.

Drawer and Spool Motor Problem

Troubleshooting guide for drawer and spool motor malfunctions.

RS-232C Serial Communication Problem

Troubleshooting guide for RS-232C serial communication errors.

Block Diagram

ER-420M Block Diagram

Overall block diagram of the ER-420M electronic cash register.

ER-420F Block Diagram

Overall block diagram of the ER-420F electronic cash register.

Power Block Diagram

Block diagram illustrating the ECR's power supply circuit.

Wiring Diagram

Wiring Pin Connection

Details pin connections for various connectors on the main PCB.

Schematic Diagrams

Main PCB Schematics

Detailed schematics for the main PCB, broken down by functional blocks.

Power Switch PCB Schematics

Schematic diagram of the power switch PCB and transformer.

Display PCB Schematics

Schematics for front and rear VFD display PCBs.

Fiscal PCB Schematics

Schematic diagram for the fiscal PCB.

STM-320 Printer PCB Schematics

Schematic diagram for the STM-320 printer PCB.

Serial I/F PCB Schematics

Schematic diagram for the serial interface PCB.

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