Eeprom Check Function - Epson 680Pro - LQ B/W Dot-matrix Printer Service Manual

EPSON Stylus COLOR 680/777/777i

5.1.13 EEPROM check function

You can check the EEPROM data or can write the specific data into the specific
address of the EEPROM directly even if the printer is error condition. (In case one of
the main logic circuit such as CPU, I/F receiver IC, RAM, EEPROM is broken, this
function is not available)
Select the "EEPROM check" function in the Maintenance menu. The main menu of
this function is as following figure. The following two function is built in this program.
n Check the EEPROM data
You can check the specific data stored in the specific address of the
EEPROM.
Input the specific address with hexadecimal code by referring Section 7.1.2
on page 127 (EEPROM map). Use this function in your analysis usefully.
Adjustment
n Change EEPROM data
You can change the specific data stored in the specific address of the
EEPROM.
However, do not use this function except the special case. Careless usage
causes any trouble.
n Do not use this function except the special case. Careless usage
causes any trouble.
Overview
Figure 5-28. EEPROM data
Revision B
115