Konica Minolta magicolor 1600W Service Manual - Page 76
nd transfer roller pressure/retraction control, Pressure sequence
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magicolor 1600W magicolor 1650EN Theory of Operation Ver. 1.0 Nov. 2008 13. 2ND TRANSFER SECTION/ MEDIA SEPARA- 13.3 Operation 13.3.1 2nd transfer roller pressure/retraction control • In color printing, the toner image of each color of toner is transferred to the transfer belt (thus a total of four times to cover the four colors of toner). Pressure/retraction control with respect to the transfer belt is therefore provided for the 2nd transfer roller. • In the standby state, the 2nd transfer roller is in a position retracted from the transfer belt. • The pressure/retraction operation is performed by the Transport motor (M1), 2nd image transfer pressure/retraction solenoid (SD4), and the pressure/retraction clutch. • When the 2nd image transfer pressure/retraction solenoid (SD4) is energized, drive from the Transport motor (M1) is transmitted to the pressure/retraction clutch. A. Pressure sequence 1. Drive from the Transport motor (M1) is transmitted to the drive gear. 2. Rotation of the drive gear is transmitted to the Pressure/retraction clutch. 3. When the 2nd image transfer pressure/retraction solenoid (SD4) is energized, the Pressure/retraction clutch rotates a half turn. This moves the Pressure slider. 4. When the Pressure slider is moved, ribs on the Pressure slider push up the 2nd transfer assy. 5. When the 2nd transfer assy is pushed up, the 2nd transfer roller is pressed up against the transfer belt. 2nd image transfer pressure/retraction solenoid (SD4) 2nd transfer assy Ribs Pressure slider Pressure/retraction clutch A034T2C535AA COMPOSITION/ OPERATION 49