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
rotating, the DC controller determines that the primary-transfer-disengagement mechanism has failed,
and notifies the formatter.
34 Chapter 1 Theory of operation ENWW
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