HP LaserJet Pro 500 - Primary-transfer-roller engagement and disengagement

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.
Figure 1-24 Three states of primary-transfer-roller engagement and disengagement
Four colors are disengaged
Four colors are engaged
Only black is engaged
Y
M
C
K
Y
M
C
K
Y
M
C
K
Y
M
C
K
Y
M
C
K
Y
M
C
K
Fuser motor
FUSER MOTOR CONTROL
Table 1-11 Primary-transfer-roller engagement states
Roller state Product state
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
36 Chapter 1 Theory of operation ENWW
draft version