LATEX DESIGNJET UPDATE: Latex 200 Series Designjet L2x500 Printer Series Date: July 2013 Impact/Severity: Medium Region: WW Support Area: PLTW Product Troubleshooting Audience: Post Sales Confidentiality: HP Restricted (Service) - HP workforce + Channel Partners Troubleshooting Printhead Reliability Issues Under specific environmental and workflow cases some customers might experience cases of frequent printhead rejection in the light printheads. This newsletter reviews the path forward for those cases. This document is a follow-up to one published in March 2012 for the HP Designjet L25500 Printer named: Troubleshooting printhead reliability issues. It covers the previous information, provides new details, and the handling procedure. Improved print system reliability reducing printhead rejection Firmware changes have been made; keeping the system pressurized during the printer’s cool down period, contributing to minimized air ingestion to solve the issue of printhead starvation. Previously printheads could ingest air while they were hot but depressurized. The new firmware keeps the air pressurization system (APS) actively pressurized by using the pump. After the defined timeout, the system is depressurized by opening the relief valve. In sleep mode or shutdown, the system is not depressurized, but pressure is left to decay by keeping the relief valve closed. This change implemented is in: - HP Designjet L25500: from FW 5008 onwards - HP Designjet L26500 (HP Latex 260): since product introduction - HP Designjet L28500 (HP Latex 280): since product introduction Note: in some cases, as well as updating the firmware, the sleep mode will also have to be modified to 120 minutes. The printer must be kept on during this time. Please check point 3 in of the troubleshooting procedure. Designjet L25500 Printer & Latex 260 (Designjet L26500 Printer) Date: July 2013 Impact/Severity: Medium Region: WW Support Area: PLTW Color Image Quality Troubleshooting Audience: Post Sales Confidentiality: HP Restricted Inconsistent colors with tiling and/or long prints This document describes the most effective workarounds for the issue ‘inconsistent colors in very long plots, and/or when carrying out tiling’, reported by some customers. Issue description and workarounds Color consistency is good using print defaults in the majority of prints and applications, however, depending on the job; a slight color shift may be seen, visible depending on print application. Several issues are covered below, using examples. These are not real cases, and color degradation has been exaggerated. SEE YOUR FULL NEWSLETTER FOR ALL DETAILS.
Posted on: Mon, 15 Jul 2013 16:36:49 +0000
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