Detecting An Error - Canon iR8500 Service Manual

CHAPTER 2 NEW FUNCTIONS

3.7.4 Detecting an Error

The reader controller circuit generates the error signal (INV_ERR) in response to an error
(e.g., output open, short circuit, leak) in the inverter circuit. A fault in the lamp (low inten-
sity, activation failure) will be identified as an activation error caused by lack of intensity
during initial activation (e.g., at time of shading correction).
E220
It is used to indicate a fault in the inverter PCB.
E225
It is used to indicate a fault in the scanning lamp (xenon tube).
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