HP LaserJet Enterprise 600 Service Manual - Page 71

Cassette lift operation (PD), Lift operation PD

Page 71 highlights

Description PD media stack surface PS1702 sensor 2 PD door open detection PS1703 sensor PD media path sensor PS1704 PD pickup solenoid SL1700 PD media size switch SW1700 Signal PD MEDIA STACK SENSOR 2 signal PD DOOR OPEN DETECTION signal PF MEDIA PATH signal PF PICKUP SOLENOID signal PF MEDIA SIZE signal Driver PD driver PD driver PD driver PD driver PD driver Cassette lift operation (PD) The lift-up operation keeps the stack surface of media in the paper deck at a specified position to perform stable pickup operation. The paper deck driver drives the PD lifter motor (M1700) to move up the lifter plate in which media is stacked. The PD lifter motor uses four pulleys to wind the wire cables and two wire cables lift the lifter plate. When the PD front door is opened, the pulley gears and the motor gear are disengaged and the lifter plate lowers under its own weight. The paper deck driver monitors the PD media stack surface sensors (PS1701, PS1702) when the product is turned on, when the PD front door is closed or during a print operation to perform the lift-up operation. Lift operation (PD) 1. Initial lift-up operation The initial lift-up operation is performed if either one of the PD media stack surface sensors (PS1701,PS1702) does not detect the media surface when the power is turned on or when the PD front door is closed. The paper deck driver drives the PD lifter motor for a specified period after both of the PD media stack surface sensors detect media and lifts the stack surface to the pickup position. The paper deck driver determines a paper deck lifter motor failure and notifies the DC controller if both of the PD media stack surface sensors do not detect media within a specified period from when a lift-up operation is started. 2. During print lift-up operation The during print lift-up operation is performed when the media surface is lowered for a specified level due to a pickup operation. The paper deck driver drives the PD lifter motor for ENWW 1x1500-sheet paper deck 47

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Description
Signal
Driver
PD media stack surface
sensor 2
PS1702
PD MEDIA STACK SENSOR 2 signal
PD driver
PD door open detection
sensor
PS1703
PD DOOR OPEN DETECTION signal
PD driver
PD media path sensor
PS1704
PF MEDIA PATH signal
PD driver
PD pickup solenoid
SL1700
PF PICKUP SOLENOID signal
PD driver
PD media size switch
SW1700
PF MEDIA SIZE signal
PD driver
Cassette lift operation (PD)
The lift-up operation keeps the stack surface of media in the paper deck at a specified position to
perform stable pickup operation.
The paper deck driver drives the PD lifter motor (M1700) to move up the lifter plate in which media is
stacked. The PD lifter motor uses four pulleys to wind the wire cables and two wire cables lift the lifter
plate. When the PD front door is opened, the pulley gears and the motor gear are disengaged and the
lifter plate lowers under its own weight.
The paper deck driver monitors the PD media stack surface sensors (PS1701, PS1702) when the
product is turned on, when the PD front door is closed or during a print operation to perform the lift-up
operation.
Lift operation (PD)
1.
Initial lift-up operation
The initial lift-up operation is performed if either one of the PD media stack surface sensors
(PS1701,PS1702) does not detect the media surface when the power is turned on or when
the PD front door is closed. The paper deck driver drives the PD lifter motor for a specified
period after both of the PD media stack surface sensors detect media and lifts the stack
surface to the pickup position.
The paper deck driver determines a paper deck lifter motor failure and notifies the DC
controller if both of the PD media stack surface sensors do not detect media within a specified
period from when a lift-up operation is started.
2.
During print lift-up operation
The during print lift-up operation is performed when the media surface is lowered for a
specified level due to a pickup operation. The paper deck driver drives the PD lifter motor for
ENWW
1x1500-sheet paper deck
47