Konica Minolta bizhub C658 Service Manual page 1980

bizhub C658/C558/C458/C368/C308/C258
[1]
[2]
[1] Adjust the document width guide plates (center alignment)
[3] Original (standard mode)
[5] Original with narrow width (mixed original mode)
(1) Detecting the width of the original
• The width of the original is set on the document feed tray will be detected by the document width sensor.
• A variable resistor is incorporated in the document width sensor. Its resistance value varies in association with the movement of the
document width guide.
• The original is to be loaded in the document feed tray by aligning it with reference to the center of the document feed tray in the standard
mode. In the mixed original mode, the original is aligned to the rear side.
(2) Detecting the length of the original
• The length of the original is set on the document feed tray will be detected by the document length sensors/1 and /2.
• The document length sensor/1 is a transmission type, while document length sensor/2 is a reflection type. The document length sensor/1
is detected by two actuators, that is, actuator/1 and actuator/2.
• When the document feed tray is not loaded with any originals, document length sensor/1 is blocked. When an original is loaded and only
actuator/1 is pressed, document length sensor/1 is unblocked. When both actuator/1 and actuator/2 are pressed, a blocked document
length sensor/1 is detected by actuator/2.
[1]
[1] Document length sensor/1 (PS8)
[3] Document length sensor/2 (PS9)
(3) Detecting the width of the original (in the mixed original/AMS mode)
• In the mixed original/AMS mode, no width is determined on the document feed tray; rather, the width is detected while the originals are
being fed. Three mixed original sensors are disposed at positions immediately after the document feed section, functioning to detect the
width of the original.
(4) Detecting the length of the original (in the mixed original/AMS mode)
• In the mixed original/AMS mode, no length is determined on the document feed tray; rather, the length of the original is calculated and
determined based on the period of time during which the document reading sensor remains activated.
(5) Document feed tray size detection
• The original size is determined by the combination of the results of detection made of the width and length of the original.
[4]
[3]
[2]
PC THEORY OF OPERATION DF-704 > 3. OPERATION
[6]
[5]
[2] Document width guide plates
[4] Align the original with narrow width with the rear side of
the document width guide plates (rear alignment)
[6] Original with wide width (mixed original mode)
[4]
[3]
[2] Actuator/1
[4] Actuator/2
PC-6