HP 220 - Manual (Page 172)

SHIFT
Service
Monitor
ALT
ALT
Servo/Encoder Test
SHIFT
Stepper
Motor Test
8Ć24 Removal and Replacement C3187Ć90000
Service Monitor (Data Display)
1 Enter service mode (see page 7Ć2).
2 Hold down the
SHIFT
and
ALT
keys and press
Service Monitor
.
3 Send the file or files from the computer through the serial
or parallel ports.
4 Press any frontĆpanel key when the file(s) have been
transferred to the plotter.
5 Load a sheet of media (A3 size or B size minimum) in portrait orientation.
Instead of plotting the drawings that you sent, the plotter plots the first and last
Kbytes of the code for those drawings. The code is printed in hexadecimal and ASCII
format. If the total size of the file s sent is not bigger than one Kbyte, only the first
buffer is printed. The plotter exits the service monitor mode if the file s sent contain
PJL universal exit language.
6 Compare the code printed with the code sent from the computer to check if
communication between the computer and the plotter is functioning correctly.
Servo/Encoder Test
1 Enter service mode (see page 7Ć2).
2 Hold down the
ALT
key and press
Servo/Encoder Test
.
The Busy LED lights upand the carriage moves to the center of the plotter. Both the
carriage and the roller then move backwards and forwards in cycles of six short steps,
changing direction between cycles.
3 Press any frontĆpanel key to stop the test.
StepperĆMotor Test
1 Enter service mode (see page 7Ć2).
2 Hold down the
SHIFT
key and press
Stepper Motor Test
.
The
Busy
LED lights up and the stepper motor switches on, continuously raising and
lowering the wiper and the lever mechanism.
3 Press the
ALT
key when you want to stop the test.
WindowĆSensor Test
1 With the
Load Media
LED lit, open the window.
The
Ready
LED should flash.
2 Close the window again.
The
Ready
LED should stopflashing, and the
Load Media
LED should light upagain.