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TRANSFER BELT UNIT CF5001 Ver.1.0 Sep. 2003
2-30
II UNIT EXPLANATION
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 3 1st transfer roll-
ers /Y, /M and /C of these rollers 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
of the cam that is driven by the 1st transfer pressure/release motor (M19).
The form of pressure varies with the copy mode. In the full color mode, both of the color 1st transfer roller
assembly and the 1st transfer roller /K are pressed. However in the black-and-white mode, only the 1st
transfer roller /K is pressed.
The release condition is detected by the 1st transfer HP sensor (PS15). The cam drive position which var-
ies with the copy mode is controlled by the drive amount of the M19 which starts when the PS15 turns off.
[1] When totally released [10] Drum /M
[2] When in the black-and-white mode [11] Drum /C
[3] When in the full color mode [12] Drum /K
[4] 1st transfer roller /K pressure release arm [13] 1st transfer roller /K
[5] Drive coupling [14] 1st transfer roller /C
[6] 1st transfer roller /K pressure release cam [15] 1st transfer pressure/release motor (M19)
[7] 1st transfer roller /C pressure release cam [16] Color 1st transfer roller assembly
[8] Drum /Y [17] 1st transfer roller /M
[9] Transfer belt [18] 1st transfer roller /Y
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