User manual HP DESIGNJET 430 SERVICE MANUAL

[. . . ] Service Manual HP DesignJet 430 HP DesignJet 450C HP DesignJet 455CA Printers For HP Internal Use Only E Copyright HewlettPackard Company 1997 This document contains proprietary information that is protected by copyright. No part of this document may be photocopied, reproduced, or translated into another language without the prior written consent of HewlettPackard Company. Warranty The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material. WARNING The procedures described in this manual are to be performed by HP-qualified service personnel only. [. . . ] 2 Enter into Service Mode 2, by powering ON the Printer while holding down the Media Source key. 3 Set the Media Type on the front panel to Coated Paper. 4 Load the film, with the matte (dull) side down, in portrait orientation into the Printer. 5 When the Ready LED lights up, press Reprint key. The Ready LED begins to flash and the Printer takes several minutes to plot the calibration plot (see Figure 1). The Printer ejects the sheet, and the Load Media LED lights up. 7 Wait until the ink on the sheet is dry. 8 Cut the sheet along the dotted line and reload the sheet facedown into the Printer, in the direction indicated by the arrows on the calibration plot (see Figure 2). The Printer takes less than 10 minutes to: read the calibration sheet; calculate the calibration data; save the data in the EEROM; and eject the sheet. 9 Unload the sheet. Service Calibrations HP DesignJet 430, 450C and 455CA Printers 5-3 Figure 1 Figure 2 5-4 HP DesignJet 430, 450C and 455CA Printers Service Calibrations Adjusting the Carriage to Media Distance It is very important that the distance between the carriage and the media is within certain limits. If the distance between the cartridge nozzles and the media is too small, ink smears on the media. If the distance is too big, unwanted spray appears around the ink dots, and vertical lines are not straight. (A big distance may also prevent the carriage from actuating the bail lever. ) Whenever you remove the Drive Roller or the Cartridge Carriage, take care to reinstall them correctly. Incorrect installation may result in the carriage being too close or too far from the media. For the correct installation procedure ' Chapter 8. To check the carriage to media distance A Gauge (included with the carriage assembly) has been produced to check the carriage to media distance to make sure it is within the tolerances allowed. Use this gauge to check the carriage to media distance as follows: 1 Open the top cover. 2 Move the carriage out of the service station. 3 Remove the Yellow cartridge from the carriage. 4 Check the gauge to determine the GO and NO GO sides: NO GO GO 5 Place the gauge on the drive roller on the left hand side of the carriage, with the GO side facing the carriage, in the position shown below: Service Calibrations HP DesignJet 430, 450C and 455CA Printers 5-5 Gauge Y B Gauge must be parallel to the center line of the Drive Roller Drive Roller 6 With the gauge held in place, manually move the carriage over the GO side of the gauge. The ledge, indicated below, should easily pass over the GO side of the gauge. WARNING Make sure that the carriage is in the down position at all times when passing over the gauge. Ledge If the ledge does not go over the GO side of the gauge, adjust the carriage to media distance ' page 5 7. 7 Remove the gauge and replace it on the drive roller with the NO GO side facing the carriage. 8 With the gauge held in place, manually try to pass the carriage over the NO GO side of the gauge. [. . . ] cyan, magenta, yellow, print quality Plot quality Product Line 30 Hewlett Packard's product line of large format, pen and ther mal inkjet plotters. Glossary-4 HP DesignJet 2500CP and 2000CP Printers PWM Pulse Width Modulation. A matrix of dots, or pixels, where each pixel is defined by a bit. A bit that is on" will print a dot on the paper. A bit that is off" will leave the area blank. [. . . ]