Canon ImageRunner iR8500 Series, Service Manual, Page: 270 / 1122

Chapter 5
5-18
F-5-26
5.3.3.6 Detecting an Error
0006-9435
iR105i/iR105+ / iR9070
As part of controlling the fluorescent lamp, checks are made of the following:
[1] Remaining life of the fluorescent lamp
[2] Activation error
[3] Thermistor error
F-5-27
Main power
switch ON
Scanning lamp (FL1)
STBY
Controlled to 70˚C
70˚C
2.9 V
4.1 V
Intensity check
Optimum level 2.9 V
Temperature at power-on (control panel)Activation period
40˚C or less
65˚C or more
40˚C to 60˚C
60˚C to 65˚C
30 sec
20 sec
5 sec
Off
WMUP
WMUPR
SLEEP
The fluorescent lamp is assumed to have reached
a level appropriate to activation when the
temperature around it reaches 70˚C, and the pre-
Purpose of the Intensity Check
[1] To determine an optimum
level
for pre-heat voltage.
[2] To find out the remaining life
Fluorescent lamp
heater (H5)
Scanning lamp pre-heat
voltage
Control
panel
Main power
switch ON
Control panel
power switch ON
Copy Start
key ON
Detection
INTR LSTR STBY STBY
Controlled to 70˚C Controlled to 70˚C
SLEEP SCFW SCRV
E225
E219
E225
E219
An error is indicated if the optimum
light intensity is not attained in 5
sec after activation.
The fluorescent lamp is assumed to
have reached the end of its life upon
detection of 170˚C or higher during
activation (requiring much power to
attain an optimum level of intensity).
The fluorescent lamp is assumed to have reached
the end of its life upon detection of 170˚C or higher
during activation (requiring much power to attain
an optimum level of intensity).
If an optimum light intensity
cannot be attained within 5
sec after activation.
Intensity sensor
output (FLDTCT)
Scanning lamp
(FL1)
Temperature sensor
output (FL-TH)