Initial Activation - Canon GP605 Service Manual

D.

Initial Activation

The fluorescent lamp is turned on when the control panel power switch is turned on for the
following:
[1] To stabilize the inside of the fluorescent lamp in the shortest time possible.
[2] To check the intensity by the light intensity sensor to determine pre-heat voltage.
The fluorescent lamp is assumed to have reached a
level appropriate to activation when the temperature
around it reaches 70˚C, and the pre-heat voltage is
increased to prepare for activation.
Fluorescent lamp heater
(H5)
Scanning lamp pre-heat
voltage
Scanning lamp (FL1)
Temperature at power-on (control panel) Activation period
Figure 3-304 Sequence of Operations (initial activation)
COPYRIGHT © 1999 CANON INC.
Control panel
Main power power switch
ON
switch ON
SLEEP
70˚C
2.9 V
40˚C or less
40˚C to 60˚C
60˚C to 65˚C
65˚C or more
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 3 ORIGINAL EXPOSURE SYSTEM
Purpose of the Intensity Check
[1] To determine an optimum level
for pre-heat voltage.
[2] To find out the remaining life of
the fluorescent lamp (approx.).
WMUP
WMUPR
4.1 V
Optimum level
Intensity check
30 sec
20 sec
5 sec
Off
STBY
Controlled to 70˚C
2.9 V
3-11