EPSON AcuLaser C9200N Revision D
OPERATING PRINCIPLES Operating Principle of Main Unit Mechanism 42
Confidential
2.2.4.3 Operation
PU LIFE CONTROL
Each PU has IC chip that detects a new PU, keeps track of the service life of
the PU and installation.
New PU detection
New PU is detected when the Main Power Switch is turned ON and the
Front Door is closed.
When a new PU is detected, a TCR adjustment sequence is carried out.
Figure 2-13. Detection of new PU
When life is reached
PU Life is detected by the PU Life counter value.
When the PU Life counter value is reached to the near life value, the
warning message "Photocon xxxx Needed Soon" is displayed.
When the PU Life counter value is reached to the life value, the
warning message "Replace Photocon xxxx" is displayed.
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