Detecting Errors - Canon GP405 Service Manual

CHAPTER 3 EXPOSURE SYSTEM
E. Detecting Errors
If an error is detected, as when the scanning lamp fails to turn on in response to the intensity
control signal, the DC-CPU on the image processor PCB sends an error detection signal to the PW-
CPU on the composite power supply PCB.
When the PW-CPU receives an error detection signal, it generates the scanning lamp OFF
signal without waiting for instructions from the image processor PCB and stops the ongoing
operation. At the same time, an error code will be indicated on the control panel.
Related Error Code
E220 The scanning lamp turned on in standby state.
The scanning lamp turned off during a copying run.
E301 The intensity of the scanning lamp fails to attain an optimum level.
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COPYRIGHT © 1999 CANON INC. CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)