HP 220 - Manual (Page 146)

SHIFT
Accuracy
Calib. Read
ALT
Bail Calibration
7Ć8 Calibrations C3187Ć90000
,0 When the
Ready
LED lights up, holddown the
SHIFT
key andpress
Accuracy Calib. Read,
The
Busy
LED lights up. The plotter takes about
3 minutes to read the calibration sheet, to calculate
the calibration data, and to save the data in the
EEROM. During this time, the plotter appears
almost motionless for short intervals. The plotter
then ejects the sheet.
,, Unloadthe sheet.
Bail Calibration
In this procedure, the `up' position of the bail assembly is calibrated. A value is stored in the
EEROM when the procedure is completed.
Perform the bail calibration whenever the:
D EEROM is cleared
D Main PCA is replaced
D Bail falls during media loading
D Bail switch is replaced
D BailĆlift mechanism is removedor replaced
To calibrate the bail, perform the following procedure:
, Enter service mode D page 7Ć2.
. Holddown the ALT key andpress Bail Calibration.
The Busy LED lights up and the bail begins cycles of being raised and lowered.
During a number of the cycles, the bail is let fall instead of being gently lowered.
The calibration ends after about a minute and a half.