Sharp ER-A470

SERVICE MANUAL
ER-A440/A450
ONLINE COMMUNICATION FUNCTION
ELECTRONIC CASH
REGISTER
MODEL ER-A440
MODEL ER-A450
(For "V" version)
SHARP CORPORATION
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
Parts marked with " " is important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.
CHAPTER 1. OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CHAPTER 2. SYSTEM CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . 1
CHAPTER 3. SPECIFICATIONS OF RS-232 INTERFACE . . . . . . . . . 2
CHAPTER 4. SIGNAL CONNECTION DIAGRAM. . . . . . . . . . . . . . . . . 2
CHAPTER 5. RS-232 PROTOCOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
CHAPTER 6. CONTROL SIGNAL SEQUENCE . . . . . . . . . . . . . . . . . 11
CHAPTER 7. DATA BLOCK FORMAT . . . . . . . . . . . . . . . . . . . . . . . . 14
CHAPTER 8. ONLINE APPLICATION. . . . . . . . . . . . . . . . . . . . . . . . . 14
CONTENTS