Konica Minolta A00F011 Service Manual - Page 81
Pressure/retraction operation
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magicolor 4650EN magicolor 4650DN 14. Transfer section (2nd transfer) Theory of operation Ver.1.0 Nov. 2007 C. Pressure/retraction operation 1. Rotation of the Transport motor is transmitted to the drive roller of the intermediate transfer belt unit. 2. Rotation of the drive roller is transmitted to the 2nd image transfer pressure/retraction clutch. 3. When the 2nd image transfer pressure/retraction clutch is energized, the rotation is transmitted to the pressure cam via a coupling gear. 4. When the pressure cam turns a half turn, the 2nd transfer roller is pressed against the transfer belt. 5. At the same time, the IDC sensor lever is pushed up to open the IDC sensor cover. 6. The light blocking plate fitted on the shaft of the pressure cam blocks the 2nd image transfer retraction position sensor and a pressed position of the 2nd transfer roller is detected. 7. When the 2nd image transfer pressure/retraction clutch is energized a second time, the pressure cam is turned another half turn. The 2nd transfer roller to be retracted from the transfer belt. At the same time, the IDC sensor lever is released, which closes the IDC sensor cover. 8. The light blocking plate unblocks the 2nd image transfer retraction position sensor and a retracted position of the 2nd transfer roller is detected. 2nd image transfer retraction position sensor (PS10) Retraction cam Retraction cam Retraction gear Composition/Operation 2nd image transfer pressure/retraction clutch (CL5) When pressed 2nd transfer roller When retracted A011T2C568AA Retraction cam A011T2C556AA 46 A011T2C555AA