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HP Latex 2700 User Guide 3 - Page 285

Advanced print-quality troubleshooting, Substrate-advance sensor check, Printhead alignment

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Substrate-advance sensor check Run the OMAS diagnostic test. NOTE: OMAS stands for Optical Media Advance Sensor, usually known as the substrate-advance sensor in this guide. The test will tell you whether the substrate-advance sensor is working correctly or not (either dirty or damaged). If the substrate-advance sensor is dirty, clean the sensor. See Clean the substrate-advance sensor on page 174. For best results, cleaning the substrate-advance sensor is included in the printer's weekly maintenance. Printhead alignment Perform the printhead alignment, manual or automatic. The result of the alignment can be verified and modified with the printhead-alignment verification plot. See Manual alignment procedure on page 127. Advanced print-quality troubleshooting If the basic print-quality troubleshooting does not solve the problem, here are some further procedures that you can try. One of the most important parts of print-quality troubleshooting is to ensure that the printheads are healthy. See Printhead-health troubleshooting on page 294. Print-quality artifacts troubleshooting The following sections provide details for this topic. Horizontal banding Horizontal banding means that your print suffers from added horizontal lines or bands, in a regular pattern. They can look different depending on the cause: Thin dark lines These are thin dark lines across the entire image with certain frequency, more easily seen in solid area fills. There are two likely causes: ● Printhead alignment. This is a clear contributor to banding. If printheads are not correctly aligned, the misplaced dots could correlate directly with the severity of the banding, by putting more ink in the same place and thus creating darker lines. To check printhead alignment, print the printhead-alignment verification plot (see Manual alignment procedure on page 127). The biggest contributor to thin-dark-line banding caused by printhead alignment is inter-color misalignment (misalignment between different colors). TIP: Fine-tune the alignment by identifiying the offenders in the printhead-alignment verification plot. See Manual alignment procedure on page 127. ● Substrate advance. Before trying to adjust any parameter, make the following checks: - Check that no substrate-advance factor was set earlier that could prevent the substrate-advance sensor from working correctly. 278 Chapter 14 Troubleshoot print-quality issues

Section	Page
Introduction	8
Welcome to your printer	8
Printer accessories and consumables	9
Documentation and useful links	9
Safety precautions	10
Main components	20
Printer software	22
Turn on the printer for the first time	22
Turn the printer on and off	23
Move the printer	24
Printer status beacon	25
HP Internal Print Server	27
Start the Internal Print Server	27
Internal Print Server widgets	28
Printer status and alerts	29
Update the printer’s firmware and software (Internal Print Server)	30
Internal Print Server settings and preferences	34
RIP distribution	35
Install and configure the RIP software	36
Install ONYX software and set up the driver	36
Install Caldera software and set up the driver	38
Printing workflows integration	41
Introduction to JDF	41
Benefits of working with JDF for file submission	41
Creating JDF job tickets	41
What printer information can be communicated to an MIS?	42
How to integrate the printer into the Caldera RIP	42
How to integrate the printer into the Onyx RIP	42
Job submission methods	42
How to integrate the printer into an MIS system or production control software	43
Handle the substrate	44
Supported substrate types	44
Supported HP substrates	46
Substrate tips	47
Color consistency	48
Substrate configurations	49
Prepare to print	50
Substrate edge holders	51
Load a roll onto the spindle	53
Load a roll into the printer	55
Double-sided printing	63
Output-platen light	67
Consistency mode (optimize for tiling)	67
Optimize for ink consumption	68
Create and manage print jobs	70
Add a new print job	70
Substrate presets	72
Use a new substrate	72
Prepare the printer for a new substrate	72
Add a substrate preset	72
Online substrate manager	78
Edit a substrate preset	83
Remove a substrate preset	86
Export multiple presets	86
Job properties	86
Set the carriage beam position	88
Handle the ink system	90
Ink system components	90
How to work with ink system components	93
Printing with white ink (2700W only)	120
Printer calibration	132
Align the printheads	132
Possible difficulties with printhead alignment	138
Color calibration	139
Color consistency between different HP Latex 2700 series printers	141
Color profiles	141
Substrate-advance compensation	141
Calibrations specific to one substrate preset	146
Recommended calibrations after particular events	146
Accessories	147
Accessory compatibility	147
Spindle	147
Dual-roll printing	148
Jumbo dual-roll kit	150
Diverter roller	151
In-line slitters	152
Substrate saver	154
Ink collector	159
Roll to free fall	164
Roll to collector	164
Hardware maintenance	166
Safety precautions	166
Maintenance resources	166
Summary of maintenance operations	168
How to perform maintenance operations	169
Diagnostics	266
Troubleshoot substrate issues	269
Substrate cannot be loaded successfully	269
Substrate has jammed	269
Substrate is not attached to the core and/or spindle	270
Substrate is not flat	271
Spindle latch suddenly opens during printer operation	271
Substrate advances with a loud continuous sound of vibration	271
There is skew or telescoping on the output spindle	272
There are wrinkles and ink smears on the substrate	273
There are ink marks on the substrate	276
Substrate sticks to the platen	276
There are physical marks on the substrate	277
There are drops of ink on the substrate	278
Print is shorter than expected	279
How to achieve better consistency between jobs of the same length	279
Collector stops winding	280
Collector occasionally fails to work correctly	280
Collector winds in the wrong direction	281
Substrate is detached or winds around the collector in the wrong direction	281
There is skew or telescoping on the collector	281
Substrate has jammed on the collector	281
Troubleshoot print-quality issues	282
General advice	282
Basic and advanced troubleshooting	283
Troubleshoot ink cartridge and printhead issues	298
Ink cartridges	298
Printheads	299
Printhead cleaning roll errors	304
Troubleshoot other issues	305
Printer does not start	305
Printer does not print	305
Printer cannot be restarted from the Internal Print Server	305
Printer seems slow	306
Request to reinitialize the carriage	306
Internal Print Server cannot detect the printer	306
Color calibration fails	306
Movable Slot System sensor errors	307
When you need help	309
HP Customer Care	309
HP PrintOS: the cloud-based platform for print specialists	309
Printer specifications	330
Functional specifications	330
Physical specifications	331
Memory specifications	332
Power specifications	332
Air supply requirements (pneumatic spindle)	332
Environmental specifications	333
Acoustic specifications	333
Flexible substrate recommendations	335
Predefined substrate settings	335
Self-adhesive vinyls	335
PVC banners	336
Papers	336
Textiles	337
Flexible films	337
Print-quality-troubleshooting summary table	339
Glossary	340

Match case Limit results 1 per page

Substrate-advance sensor check

Run the OMAS diagnostic test.

NOTE:

OMAS stands for Optical Media Advance Sensor, usually known as the substrate-advance sensor in this

guide.

The test will tell you whether the substrate-advance sensor is working correctly or not (either dirty or damaged).

If the substrate-advance sensor is dirty, clean the sensor. See

Clean the substrate-advance sensor

on page

174

For best results, cleaning the substrate-advance sensor is included in the printer’s weekly maintenance.

Printhead alignment

Perform the printhead alignment, manual or automatic.

The result of the alignment can be verified and modified with the printhead-alignment verification plot. See

Manual alignment procedure

on page

127

Advanced print-quality troubleshooting

If the basic print-quality troubleshooting does not solve the problem, here are some further procedures that you

can try.

One of the most important parts of print-quality troubleshooting is to ensure that the printheads are healthy. See

Printhead-health troubleshooting

on page

294

Print-quality artifacts troubleshooting

The following sections provide details for this topic.

Horizontal banding

Horizontal banding means that your print suﬀers from added horizontal lines or bands, in a regular pattern. They

can look diﬀerent depending on the cause:

Thin dark lines

These are thin dark lines across the entire image with certain frequency, more easily seen in solid area ﬁlls.

There are two likely causes:

●

Printhead alignment.

This is a clear contributor to banding. If printheads are not correctly aligned, the

misplaced dots could correlate directly with the severity of the banding, by putting more ink in the same

place and thus creating darker lines.

To check printhead alignment, print the printhead-alignment veriﬁcation plot (see

Manual alignment

procedure

on page

127

). The biggest contributor to thin-dark-line banding caused by printhead alignment is

inter-color misalignment (misalignment between diﬀerent colors).

TIP:

Fine-tune the alignment by identifiying the offenders in the printhead-alignment verification plot.

See

Manual alignment procedure

on page

127

●

Substrate advance.

Before trying to adjust any parameter, make the following checks:

–

Check that no substrate-advance factor was set earlier that could prevent the substrate-advance sensor

from working correctly.

278

Chapter 14

Troubleshoot print-quality issues