HP Latex 300 Series Service Manual

In the first step, the test prints a pattern navigating (measuring the movements) with the OMAS and creates
in the hard disk a file with the navigation information from the OMAS system.
In the second step, the test scans the printed pattern with the line sensor measuring the distance between
the lines of the pattern, and stores in the hard disk a file with the information from the line sensor.
Finally the test compares the information from the OMAS and the information from the line sensor scan, if
the comparison is meaningful (there is no problem with the files stored in the hard disk) the firmware
calculates what is the necessary compensation to be applied to the measurements of the OMAS to match the
values measured by the line sensor.
Then, the firmware saves the OMAS compensation value in the NVM.
From this moment on, the measurements of the OMAS system will be compensated, providing better
accuracy.
Perform the OMAS module calibration as follows:
Before starting the process, make sure that HP Universal Instant-dry Paper is loaded and ready to print. You
will find two sheets included in the following service kits:
●
B4H70-67006 OMAS Module 64
●
B4H70-67002 Static Front Platens 64
●
B4H70-67008 Drive Roller 64
●
B4H69-67005 Drive Roller 54
You can also find two calibration sheets as an individual service kit: CQ871-67106 OMAS Calibration 54-in
sheet.
Procedure
1. Go to Service Menu > 4. Service Calibrations > 4.1 Substrate Path Menu > 4.1.2 OMAS Calibration >
4.1.2.1 Print Calibration Pattern.
2. The front panel asks for confirmation; press OK.
3. If substrate is already loaded, it is unloaded. If it cannot be unloaded automatically, the front panel asks
you to unload it manually.
4. The front panel prompts you to load substrate.
NOTE: During this calibration process you have to load the substrate with the Carriage positioned in
the print path.
●
Raise the Substrate Lever.
●
Load the substrate.
●
Lower the Substrate Lever.
5. Select the substrate type (HP Paper Aqueous).
6. The substrate calibration process starts and the front panel shows the following messages:
●
Calibrating paper advance.
●
Trimming roll edge. Please wait.
7. The front panel then prompts you to unroll 1 meter of substrate to avoid back tension. Unroll 1 meter of
substrate and press OK.
180 Chapter 4 Service Tests, Utilities, and Calibrations ENWW

HP Latex 300 Series Specifications

General

Brand	HP
Model	Latex 300 Series
Category	Printer
Language	English