TRANSFER BELT UNIT hp Color 9850mfp 5.2 Operation 5.2.1 Transfer belt pressure/release mechanism The 1st transfer roller that presses the transfer belt against the drum is made up of the 1st transfer rollers Y, M and C for the drums Y, M and C and the 1st transfer roller K for the drum K. The three 1st transfer rollers Y, M and C operate as a unit (color 1st transfer roller assembly).
When the 1st transfer is made from the drum to the transfer belt, the color 1st transfer roller assembly and the 1st transfer roller K push out the transfer belt from the inside and press it against the drum, by means II UNIT EXPLANATION of the cam that is driven by the 1st transfer pressure/release motor (M19). assembly and the 1st transfer roller K are pressed. However in the black-and-white mode, only the 1st The form of pressure varies with the copy mode. In the full color mode, both of the color 1st transfer roller transfer roller K is pressed. The release condition is detected by the 1st transfer HP sensor (PS15).
The cam drive postion which var- ies with the copy mode is controlled by the drive amount of the M19 which starts when the PS15 turns off.
[18] [8] [9] [17] [10] [16] [15] [11] [7] [14] [6] [5] [12] [4] [3] [2] [1] [13] [1] When totally released [10] [2] When in the black-and-white mode [11] Drum M Drum C [3] When in the full color mode [12] Drum K [4] [13] 1st transfer roller K pressure release arm 1st transfer roller K [5] Drive coupling [14] [6] [15] 1st transfer pressure/release motor (M19) 1st transfer roller K pressure release cam 1st transfer roller C [7] [16] Color 1st transfer roller assembly 1st transfer roller C pressure release cam [8] [17] Drum Y 1st transfer roller M [9] Transfer belt [18] 1st transfer roller Y 2-32