This document introduces the maintenance mode and program mode of the electronic cash register ER-A320.
The Sharp ER‑A320 electronic cash register service manual details the three operating modes: Service (SRV), Program (PGM), and OP X/Z (including X1/Z1 and X2/Z2) modes. Each chapter explains the purpose of the mode, step‑by‑step procedures, and the key combinations required for resetting, programming, and generating reports.
The document also lists the complete key layout, printer model (UCR‑812A), and various programmable parameters such as tax tables, date/time format, and consecutive number settings. Safety warnings and part replacement guidelines are included to ensure reliable operation and maintenance. This manual is written in Chinese.