Stepper Motors; Sensors; Line Sensor; Cover Sensors - HP DesignJet 2500CP Service Manual

Stepper Motors

Three six pin connectors connect three stepper motors on the left hand side
to the refill interconnect PCA:
The Bail stepper motor lifts the bail assembly during paper loading
D
During printhead refill the Elevator stepper motor moves the elevator
D
assembly up and down.
The Refill stepper motor moves the refill assembly to engage the valves.
D
Three six pin connectors connect three stepper motors on the right hand side
to the service station interconnect PCA:
Two stepper motors move the service station forward and backward and
D
up and down.
The primer stepper motor drives the primer assembly.
D

Sensors

Line Sensor

The line sensor is located on the carriage assembly. The functions of the line
sensor are:
Detect and measure lines when performing the accuracy calibration.
D
Detect and measure lines when performing the printhead alignment.
D
Detect the media width and skew during media loading.
D
Detect the position of the drive roller by reading a mark located on the
D
side of the drive roller.
Checks each nozzle is operating correctly.
D
Detect the amount of ink that a printhead has to spit in order to reach the
D
reference colour.
Performs the X axis calibration
D
Other sensors located on the carriage PCA are the temperature and humidity
sensors and the encoder strip sensor.

Cover Sensors

There are two mechanical sensors located on the right hand cover. These
sense the opening and closing of the right hand cover door and the window.
They are connected to the control panel, information is then relayed to the
main PCA in electronics enclosure.
The left hand cover door sensor is mounted on the side plate. It is connected
to the refill interconnect PCA, information is then relayed to the main PCA
in the electronics module.
Functional Overview HP DesignJet CP Series Printers 10-7