Fluorescent Lamp Automatic; Fluorescent Lamp Protection Mechanism - Canon NP6218 Service Manual

7. Fluorescent Lamp Automatic

Correction Control (ALVC control)
The copier executes control (ALVC control) that automatically corrects the scanning
lamp on voltage to make up for the change that otherwise could occur as a result of
deterioration of the photosensitive drum.

8. Fluorescent Lamp Protection Mechanism

If the fluorescent lamp fails or flickers continuously after copying is started, the
microprocessor on the DC controller increases the application voltage to turn on the
lamp properly.
This, however, imposes an excessive voltage to the fluorescent lamp, speeding up its
deterioration. To prevent such a problem, the DC controller turns off the power when an
error in the application voltage is detected on the composite power supply PCB.
Reference:
If the same problem occurs when the power is returned, the fluorescent lamp may
be faulty. Try replacing it.
Warning:
Do not execute operations that turn on the fluorescent lamp (coying, service mode)
without installing the fluorescend lamp.
COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 4 IMAGE FORMATION SYSTEM
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