MINOLTA-QMS PagePro 4100 Series, Service Manual

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6-2. Malfunction Detection
When any of the following problems are detected, all driving units are turned off with the
corresponding hardware error issued to the control panel.
6-2-1. Fusing Malfunction
(1) The Thermistor detecting temperature has exceeded 240
°
C/464ºF for 50 msec. during
temperature control.
(2) The temperature detected by the Thermistor has not reached the reference temperature
for 50 msec. within 12 to 30 sec. after warming up. (This detection applies only when
the Thermistor detecting temperature is 160
°
C/320ºF or less.)
(3) The Thermistor detecting temperature has not reached the reference temperature
within 120 sec. after warming up.
(4) The Thermistor detecting temperature during the idle state has fallen to 70
°
C/158ºF or
lower for 50 msec., or the temperature during printing has fallen to 160
°
C/320ºF or lower.
6-2-2. Laser malfunction
The Laser Diode is forcibly activated for 0.8 sec. after the Polygon Motor (M2) turns ON.
At this time, laser emission power is adjusted. The LD_APC1 signal or LD_APC2 signal
deviates from the specified value while the laser emission power is adjusted. LD_APC1/
LD_APC2: These signals are to adjust the laser drive current.
6-2-3. Main Motor Malfunction
(1) The motor lock signal has not been ON within 1.0 sec. after the Main Motor (M1) is
energized.
(2) When motor lock signal is continuously turned OFF for 0.1 seconds during main
motor rotation.
6-2-4. Polygon Motor Malfunction
(1) The -SSCAN signal has not been entered once within 0.8 sec. after the Polygon Motor
is energized.
(2) The number of Polygon Motor rotations has not stabilized within
±
0.5% by 5.5 sec.
after the Motor is energized.
(3) The number of Polygon Motor rotations has exceeded
±
3% for more than 0.5 sec.
after the Motor is energized and the rotation number stabilizes within
±
0.5%.
6-2-5. Cooling Fan Motor Malfunction
(1) When lock detection voltage (0.35V) is continuously detected between 0.5sec. at the
time of Fusing Unit Cooling Fan Motor (M3) rotation.
(2) When lock detection voltage (0.35V) is continuously detected between 0.5sec. at the
time of P/H Cooling Fan Motor (M3) rotation.
6-2-6. Jog Motor Malfunction (4100GN only)
(1) The Jog Position Sensor (JOG_POS) does not deactivate within 0.5 sec. after the Jog
Motor (M4) rotates. (Home Position to Jog Position)
(2) The Jog Position Sensor (JOG_POS) does not activate within 0.5 sec. after the Jog
Motor (M4) rotates. (Jog Position to Home Position)