Xerox MF Series, Техническая документация

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T-9
3. MALFUNCTIONS/WARNING
3-1. List of Malfunctions
Malfunction Name Description
Polygon Motor
malfunction
• The LOCK signal is not detected within a predetermined period of
time that begins 1 sec. after the Polygon Motor has been energized.
• No new LOCK signal is detected for a 1-sec. period that begins 1.5
sec. after the first LOCK signal was detected.
• The LOCK signal is not detected for a continuous 0.5-sec. period in
a state in which the Polygon Motor runs stably.
• The LOCK signal remains ON for a continuous 5-sec. period or
more when the Polygon Motor remains deenergized.
Laser malfunction
• The laser output exceeds the upper limit value.
• The laser output remains lower than the lower limit value.
• The Start Scan signal (-S_SCAN) is not detected at all within a pre-
determined period of time after the laser has been turned ON.
• The Start Scan signal (-S_SCAN) is turned OFF.
Cooling Fan Motor
malfunction
• The LOCK signal remains HIGH or LOW continuously for a prede-
termined period of time while the Cooling Fan Motor remains ener-
gized.
Warm-up failure
• The voltage of the Thermistor remains low for a predetermined
period of time when a warm-up cycle is started.
• The temperature detected by the Thermistor remains lower than a
reference value for a predetermined period of time for the period of
time that begins 5 sec. after, and ends 9 sec. after, the start of the
warm-up cycle (where the temperature detected by the Thermistor
is 80 °C or less).
• The temperature detected by the Thermistor does not increase for
a 3-sec. period or more for the period of time that begins after the
lapse of a predetermined period of time after the Fusing Roller
Heater Lamp has been turned ON and ends when the lamp is
turned OFF.
• The Fusing Roller Heater Lamp remains ON for a 30-sec. period or
more (except during the period through which the Main Motor
remains energized).
Abnormally low
fusing temperature
• The temperature detected by the Thermistor remains lower than the
set temperature continuously for a predetermined period of time
while the fusing temperature control is being provided. (The set
temperatures are as follows: 140 °C during a print mode at 600 dpi;
110 °C during a print mode at 1200 dpi; 70 °C during the standby
mode.)
Abnormally high
fusing temperature
• The temperature detected by the Thermistor remains higher than
235 °C for a predetermined period of time while the fusing tempera-
ture control is being provided.
High voltage
failure
• The Drum Charge Monitor Voltage (HVC_MON) signal falls outside
a predetermined range at any time after the lapse of a predeter-
mined period of time after the Power Switch has been turned ON.
• The Image Transfer Voltage Monitor signal (T_MON_V) and Image
Transfer Current Monitor signal (T_MON_I) fall outside a corre-
sponding predetermined range.