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bizhub PRO C6500
11. INTERMIDIATE TRANSFER SECTION
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Theory of Operation Ver1.0 Sep.2006
11.3 Operation
11.3.1 First transfer roller pressure/release mechanism
• During first transfer, the transfer belt [9] is pressed against and released from the drums /Y [8], /M [10], /C
[11] and /K [12].
• The three first transfer rollers /Y [18], /M [17] and /C [14] are included in the color first transfer roller assy [16]
and driven simultaneously.
• The color first transfer roller assy drives the first transfer pressure/release motor (M19) [15] via the first trans-
fer roller /C pressure release cam [7].
• The first transfer roller /K [13] drives the M19 via the first transfer roller /K pressure release arm [4] and the
first transfer roller /K pressure release cam [6].
• The two cams rotate synchronously. The difference in shape between the two cams enables to move the
color first transfer roller assy between the three positions according to the print mode.
• In full color mode, the both color first transfer roller assy and the first transfer roller /K are pressed [3].
• In black-and-white mode, only the first transfer roller /K is pressed.
• The rotating position of the cam is detected by the first transfer HP sensor (PS15).
• The rotation amount of the cam is controlled by the drive force of the M19 that starts to rotate when the
PS15 turns off.
[1] In standby mode [10] Drum /M
[2] In black-and-white mode [11] Drum /C
[3] In full color mode [12] Drum /K
[4] First transfer roller /K pressure release arm [13] First transfer roller /K
[5] Drive coupling [14] First transfer roller /C
[6] First transfer roller /K pressure release arm [15] First transfer pressure/release motor (M19)
[7] First transfer roller /C pressure release cam [16] Color First transfer roller assy
[8] Drum /Y [17] First transfer roller /M
[9] Transfer belt [18] First transfer roller /Y
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[8]
[10]
[11]
[12]
[9]
[15]
[14]
[16]
[17]
[18]
[13]
[4]
[6]
[5]
[7]
[3] [2] [1]