6-2.Malfunction Detection; 6-2-1.Laser Malfunction; 6-2-2.Polygon Motor Malfunction; 6-2-3.Main Motor Malfunction - Minolta QMS PageWorks/Pro 1100 Service Manual

6-2.Malfunction Detection

All elements are deactivated when the malfunctions described below are
detected.
6-2-1. Laser malfunction
The Laser Diode is forcibly activated immediately after the Polygon Motor (M3)
starts rotation. At this time, laser emission power is adjusted. The DA1 signal or
DA2 signal deviates from the specified value while the laser emission power is
adjusted. DA1/DA2: These signals are to adjust the laser drive current.
6-2-2. Polygon Motor Malfunction
1. The -SSCAN signal has not been entered once within 0.8 sec. after the Poly-
gon Motor is energized.
2. The number of Polygon Motor rotations has not stabilized within
sec. after the Motor is energized.
3. The number of Polygon Motor rotations has exceeded
after the Motor is energized and the rotation number stabilizes within
6-2-3. Main Motor Malfunction
1. The Motor Lock signal is not detected within 1.0 sec. after the Main Motor is
energized.
2. The Motor Lock signal remains OFF for 0.1 sec.
6-2-4. Fusing Malfunction
1. The Thermistor detecting temperature has exceeded 220°C for 50 msec. dur-
ing temperature control.
2. The temperature detected by the Thermistor has not reached the reference
temperature for 50 msec. within 8 to 12 sec. after warming up. (This detection
applies only when the Thermistor detecting temperature is 80°C or less.)
3. The Thermistor detecting temperature has not reached the reference tempera-
ture within 45 sec. after warming up.
4. The Thermistor detecting temperature during the idle state has fallen to 70°C
or lower for 50 msec., or the temperature during printing has fallen to 140°C or
lower.
±
73
±
0.5% by 6
3% for more than 0.5
±
0.5%.