EPSON AcuLaser C2800/C2800D/C3800/C3800D Revision C
ADJUSTMENT      Adjustment 387
Confidential
5.2.4  MCU Maintenance Program
PURPOSE
EEPROM on a PWBA MCU stores information unique to each printer. 
When replacing the PWBA MCU, follow the procedure below to back up the 
information saved in the current EEPROM and write it into the one on a new PWBA 
MCU.
TOOL
 Program 
MCU Maintenance Program
 System requirements
 OS: Windows 2000/XP
 Port used: USB
 Interface
 When replacing a PWBA MCU, verify that the version of the 
firmware on a new PWBA MCU matches the version of the 
previous PWBA MCU. If not, be sure to make them match each 
other by either upgrading or downgrading the firmware. 
 Do not replace both PWBA EEPROM XPRO and PWBA MCU 
at a time.
C H E C K
P O I N T
When the printer is turned on for the first time after the PWBA 
MCU is replaced, the information unique to each printer is 
automatically saved into a memory on the new board. Due to this 
reason, the board becomes unique to specific printer, and the board 
can no longer be used in other printer. 
To use the PWBA MCU into which specific information is already 
written in other printer, execute “MCU Initialize”.