ENWW Image formation system 163
Transfer unit life detection
The printer detects whether the transfer unit is coming to the end of its life.
The DC controller monitors the accumulated rotation time of the drum motor (M3) for detection of
transfer unit life.
The DC controller writes the drum motor rotation time into the EEPROM in the DC controller every
specified time when the drum motor rotates. The EEPROM, that stores the accumulated rotation
time of the drum motor, judges that the transfer unit is at the end of its life when the accumulated
time exceeds a specified time and sends an error message to the formatter.
Figure 5-47 Transfer unit life detection control
Note The accumulated rotation time of the drum motor can be cleared by the formatter. Remember to
reset the transfer unit life expectancy value (accumulated rotation time of the drum motor) using the
control panel when replacing the ITB unit.
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