C0400 Exposure Lamp Fl1'S Failure To Turn On; C0420 Exposure Lamp Fl1 Turning On At Abnormal Timing; C14A3 Ir Warming-Up Failure; C0500 Warming-Up Failure - Minolta Di 620 Manual

C04∗∗ Exposure Lamp malfunctions
C14A∗ Exposure Lamp Heater malfunctions
Code Description
C0400 Exposure Lamp FL1's failure to
turn ON
C0420 Exposure Lamp FL1 turning ON at
abnormal timing
C14A0 Defective Exposure Lamp Heater
UN13 (during warming-up)
C14A1 Defective Exposure Lamp Heater
UN13 (abnormally low tempera-
ture)
C14A2 Defective Exposure Lamp Heater
UN13 (abnormally high tempera-
ture)

C14A3 IR warming-up failure

C05∗∗ Fusing Unit malfunctions
Code Description
C0500 Warming-up failure (defective
Upper Fusing Roller Heater Lamp)
C0510 Abnormally low fusing temperature • The surface temperature of the Upper Fusing Roller
C0520 Abnormally high fusing tempera-
ture
C0540 Fusing Roller Thermistor loading
failure

C0550 Hard protect detected

Detection Timing
<When the light intensity is adjusted>
The CCD read data does not exceed the specified level
when the peak is detected of the intensity of light after
the lapse of, or within, 1 min. after FL1 has turned ON.
<Normally>
The CCD read data does not exceed the specified level
450 msec. after FL1 has turned ON.
<When the light intensity is adjusted>
The adjusted value for the intensity of light remains at
the lower limit (48%) and the CCD output level is at the
saturation level even after the lapse of 2 sec. or more
after FL1 has turned ON.
The temperature does not reach 60°C within 150 sec.
after UN13 has been turned ON.
The temperature remains at 40°C or below for a continu-
ous 2-sec. or more period after the copier has com-
pleted warming up.
The temperature remains at 110°C or higher for a con-
tinuous 2-sec. or more period after the copier has com-
pleted warming up.
<When the light intensity is adjusted>
A Temperature-Under-Control signal is not received
from the engine within 195 sec. after FL1 has turned
ON.
Detection Timing
During warming-up, the surface temperature of the
Upper Fusing Roller does not reach:
• 90°C within 180 sec. from room temperature
• 140°C within 180 sec. after it has reached 90°C
• 170°C within 120 sec. after it has reached 140°C
• The set temperature within 120 sec. after it has
reached 170°C.
remains 140°C or less for a continuous 2-sec. or more
period after the copier has warmed up.
• The surface temperature of the Lower Fusing Roller
remains 80°C or less for a continuous 2-sec. or more
period after its temperature has reached the set level.
• The surface temperature of the Upper Fusing Roller
remains 220°C or more for a continuous 2-sec. or
more period after the copier has warmed up.
• The surface temperature of the Lower Fusing Roller
remains 190°C or more for a continuous 2-sec. or
more period after its temperature has reached the set
level.
The Thermistor Set signal remains HIGH for a continu-
ous 4-sec. or more period.
The Fusing Hard Protect signal remains LOW for a con-
tinuous 20-msec. period.
T-27