Primary-transfer-roller engagement and disengagement
Depending on the requirements of the print job, the primary-transfer rollers engage with the ITB so it
can receive toner from the photosensitive drums.
Table 5-10 Primary-transfer-roller engagement states
All rollers disengaged The home position for the ITB unit
All rollers engaged The state for a full-color print job
Black roller engaged The state for a black-only print job
The primary-transfer-roller disengagement motor rotates or reverses to place the primary-transfer-roller
disengagement cam into one of three positions. The cam causes the transfer-roller slide plate to move
to the right or left. This movement causes the primary-transfer rollers to move up to engage the ITB with
the photosensitive drum or down to disengage it.
If the DC controller does not receive the expected signal from the ITB home-position sensor when the
primary-transfer-roller engages or disengages, but the primary-transfer-roller disengagement motor is
ENWW Image-formation system 143
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