Pagepro 1200W Malfunction Detection - MINOLTA-QMS PagePro 1200 Series Service Manual

PagePro 1200 Series Troubleshooting
7-3.

PagePro 1200W Malfunction Detection

When any of the following malfunctions is detected, the drive for all elements is turned OFF and the
hardware error is displayed on the control panel and the Status Monitor installed in the PC.
(1) Laser malfunction
The laser diode is forced to turn ON for power adjustment immediately after the Polygon Motor
(M3) has been energized.
(2) Polygon Motor malfunction
1. No -S_SCAN signals are detected within 0.8 sec. after the Polygon Motor has been energized.
2. The number of Polygon Motor rotations has not stabilized within ±0.5% by 6 sec. after the
Motor is energized.
3. The number of Polygon Motor rotations has exceeded ±3% for more than 0.5 after the Motor is
energized and the rotation number stabilizes within ±0.5%.
(3) Main Motor malfunction
1. No -Motor_Lock signals are detected within 1 sec. after the Main Motor has been energized.
2. The -Motor_Lock signal remains OFF for a continuous 0.1-sec. period.
(4) Fusing Malfunction
1. An abnormally high fusing temperature results if the temperature detected by the Thermistor
°
exceeds 230 C for 0.05 sec. while the fusing temperature is being controlled.
2. The Thermistor is considered to be faulty if the temperature detected by the Thermistor is less
than the specified value for 0.05 sec. at any time for a 9-sec. period after 5 sec. after the warm-up
cycle has been started (only if the temperature detected by the Thermistor is 80
3. A warm-up failure results if the temperature detected by the Thermistor does not increase for the
period of 3 sec. or more during the period of time from 0.7 sec. after the Heater Lamp (H1) is
turned ON to the time when the Heater Lamp (H1) is turned OFF (except during printing).
4. A warm-up failure results if the Heater Lamp (H1) remains ON for 30 sec.
5. An abnormally low fusing temperature results if the temperature detected by the Thermistor
remains below the set temperature for a continuous 0.05 sec. period in any mode (the set temper-
°
ature is 140 C at 600 dpi and 110
(5) Cooling Fan Motor malfunction
A Cooling Fan Motor Lock signal (FAN_LOCK) is detected for a continuous 2-sec. period or more
while the Cooling Fan Motor (M2) is being energized.
(6) High voltage malfunction
1. The drum charge monitor voltage (C_MON) falls outside the specified range at any time 0.5 sec.
after the power has been turned ON.
2. The image transfer monitor voltage (T_MON_V, T_MON_I) signal falls outside the specified
range
°
C at 1200 dpi during printing, and 70
92
°
C or less).
°
C during standby).