Konica Minolta magicolor 1690MF Service Manual - Page 72
Cleaning blade pressure/retraction mechanism, Pressure/retraction operation
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magicolor 1680MF magicolor 1690MF Theory of Operation Ver. 1.0 Nov. 2008 13. 1st transfer section 13.3.3 Cleaning blade pressure/retraction mechanism • In color printing, an image is formed on the transfer belt for each color of toner. The cleaning blade is therefore provided with a pressure/retraction mechanism. • The machine is not, however, provided with a pressure/retraction sensor. Instead, the IDC sensor detects a sample image on the transfer belt to control the pressure/retraction operation. • In monochrome printing, no retraction sequence is carried out. • The cleaning blade is normally in pressed contact with the transfer belt. A. Pressure/retraction operation • The cleaning blade pressure/retraction operations are performed by the Transport motor (M1), Cleaning blade pressure/retraction solenoid (SD5), pressure cam, and the lever. • When the Cleaning blade pressure/retraction solenoid (SD5) is energized, drive from the Transport motor (M1) is transmitted to the pressure cam. Pressure cam Cleaning blade pressure/ retraction solenoid (SD5) Cleaning blade Pressure cam Transport motor (M1) A034T2C529AA COMPOSITION/ OPERATION 45