p. 1

service manual hp designjet 430 hp designjet 450c hp designjet 455ca printers

[close]

p. 2

for hp internal use only e copyright hewlettpackard company 1997 this document contains proprietary information that is protected by copyright all rights are reserved 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 electrical shock hazard serious shock hazard leading to death or injury may result if you do not take the following precautions d ensure that the ac power outlet mains has a protective earth ground terminal d disconnect the printer from the power source prior to performing any maintenance d prevent water or other liquids from running onto electrical components or circuits or through openings in the enclosure electrostatic discharge refer to the beginning of chapter 8 of this manual for precautions you should take to prevent damage to the printer circuits from electrostatic discharge safety symbols general definitions of safety symbols are given immediately after the table of contents first edition september 1997 product support barcelona division hewlett-packard española s.a avda graells 501 08190 sant cugat del vallès spain

[close]

p. 3

service manual hp designjet 430 hp designjet 450c hp designjet 455ca printers

[close]

p. 4

using this manual purpose this manual contains information necessary to test calibrate and service d d d hp designjet 430 printers models c4713a and 4714a hp designjet 450c printers models c4715a and 4716a hp designjet 455ca printers models c6080a and c6081a for information about using these printers refer to the corresponding user and quick reference guides readership the procedures described in this manual are to be performed by hp certified service personnel only part numbers part numbers for plotter options accessories and service parts are located in chapter 7 conventions this manual contains information for the color hp designjet 430 450c and 455ca printers a small arrow is used to indicate other parts of the service manual or user s guide where you can find information related to the topic you are consulting ii using this manual hp designjet 430 450c and 455ca printers

[close]

p. 5

contents using this manual ii safety symbols x 1 troubleshooting 12 12 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 3 3 3 4 4 4 4 5 6 6 7 7 8 8 is the printer using the latest firmware revision important information what can i do when a system error code appears on the front panel display have you performed a service test on the failed component/assembly have you performed the accuracy calibration what can i do to solve print quality problems what can i do if the line sensor has problems detecting media what can i do if the carriage is noisy what can i do if the cover sensor isn t working what can i do if the carriage assembly has problems parking in the service station what can i do if the printer continuously rejects cartridges what can i do if the media continuously crashes what can i do if the printer does not power on what can i do if the printer has problems with media loading what can i do if the printer has problems with the cutter what can i do if the bail mechanism fails what is an eerom error 2 system error codes important information on troubleshooting error codes 2 2 system error codes 2 4 3 user messages user messages 3 2 hp designjet 430 450c and 455ca printers contents iii

[close]

p. 6

4 service tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 2 2 2 3 3 4 6 6 6 7 8 9 10 12 15 16 18 19 21 22 22 22 23 24 25 26 27 29 30 30 32 introduction power on self test and normal initialization service tests which service test to perform service tests diagnostics service mode 1 stopping a test entering service mode 1 viewing test output via the serial port bail cycle test front panel test carriage axis y axis test carriage test sensors test media axis x axis test bench run modular test electronics test service mode 2 stopping a test entering service mode 2 bail test electrical test servo/encoder test service monitor data display eerom model id configuration procedure service configuration plot printing the service configuration plot interpreting the service configuration plot clearing the eerom 5 service calibrations accuracy calibration purpose what is the end point accuracy specification what can affect the end point accuracy before performing the accuracy calibration performing the accuracy calibration adjusting the carriage to media distance to check the carriage to media distance to adjust the carriage to media distance 5 5 5 5 5 5 5 5 5 2 2 2 2 3 3 5 5 7 iv contents hp designjet 430 450c and 455ca printers

[close]

p. 7

6 image quality 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 2 3 3 3 3 5 5 5 7 9 11 12 15 15 16 16 16 16 17 17 18 print quality troubleshooting checklist print quality plot introduction using the print quality plot printing the print quality plot analyzing the print quality plot test pattern 1 cartridge warm up test pattern 2 nozzle print test test pattern 3 vertical line straightness test test pattern 4 color alignment quality test test pattern 5 color variation test test pattern 6 banding test no printing defects found in the print quality plot media print quality defects troubleshooting starwheel marks uneven fill density spray bleeding blooming and wicking ink smearing hue changes 7 parts list exchange assemblies replacement parts figure 1 general view figure 2 printer support figure 3 rollfeed assembly figure 4 covers figure 5 front panel spittoon and electronics module figure 6 x and y axis motors and encoder strip figure 7 primer assembly and service station assembly figure 8 carriage assembly and trailing cable figure 9 bail and overdrive mechanisms figure 10 pincharm assembly figure 11 entry platen drive roller bail and overdrive assembly printer labels users guide and quick reference guide bundle front panel overlays compatible documentation plug in memory ram simm cartridges external print servers 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 2 2 3 4 6 8 10 12 14 16 18 20 22 24 25 25 26 26 26 27 hp designjet 430 450c and 455ca printers contents v

[close]

p. 8

8 removal and installation 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 3 3 3 4 5 6 7 8 9 10 11 12 13 15 17 18 20 21 22 23 24 25 26 28 32 34 36 37 41 42 44 45 47 introduction reassembly safety precautions electrostatic discharge esd precautions required tools installing a ram or rom simm removing the bail assembly removing the top cover removing the rollfeed assembly removing the left end cover removing the right end cover removing the front panel assembly removing the electronics module removing the encoder strip removing the right bracket removing the carriage motor removing the spittoon removing the cutter assembly removing the drive roller gear removing the media motor assembly removing the pinch arm mechanism removing the primer assembly removing the service station removing the bail lift mechanism removing the engaging lever support removing the trailing cable removing the trailing cable guide removing the carriage assembly removing the drive belt removing the drive belt pulley removing the drive roller reinstalling the drive roller removing the pinch arm lift mechanism removing the overdrive assembly including the overdrive roller media separator media deflectors and media sensor removing the entry platen 9 preventive maintenance 8 50 8 52 moisture on printer level of printer usage friction on slider rod noisy carriage wheel ink spilling belt swelling cleaning the printer general cleaning cleaning the drive roller 9 9 9 9 9 9 9 9 9 2 2 2 2 3 3 4 4 4 vi contents hp designjet 430 450c and 455ca printers

[close]

p. 9

10 functional overview introduction roll media removing static charge from the media gripping the media pinch arm sensor providing a force on top of the media bail bail lift mechanism detecting the lines and media edges line sensor moving the carriage carriage drive mechanics motor belt and pulley carriage guidance positional feedback carriage pca providing ink print cartridges distance between carriage and media producing an image print mode characteristics servicing the cartridges service station spittoon primer electronics module sensors rom ram eerom input/output interfaces bi tronics rs 232 c power supply water condensation memory usage plot orientation raster image processor 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 2 2 2 3 3 3 3 3 3 3 4 4 4 4 4 4 5 5 5 5 5 6 6 6 6 7 7 7 7 7 8 8 8 8 8 9 9 9 hp designjet 430 450c and 455ca printers contents vii

[close]

p. 10

general definition of safety symbols international caution symbol refer to manual the product is marked with this symbol when it is necessary for the user to refer to the instruction manual in order to protect against damage to the instrument indicates dangerous voltage terminals fed from the interior by voltage exceeding 1000 volts must also be marked or protective conductor terminal for protection against electrical shock in case of a fault used with field wiring terminals to indicate the terminal that must be connected to ground before operating equipment low-noise or noiseless clean ground earth terminal used for a signal common as well as providing protection against electrical shock in case of a fault a terminal marked with this symbol must be connected to ground in the manner described in the installation operating manual and before operating the equipment or frame or chassis terminal a connection to the frame chassis of the equipment which normally includes all exposed metal alternating current direct current alternating or direct current warning the warning sign denotes a hazard it calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury take care not to cut yourself on the encoder strip inside the plotter the caution sign denotes a hazard it calls attention to an operating procedure practice or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the product caution viii contents hp designjet 430 450c and 455ca printers

[close]

p. 11

1 troubleshooting hp designjet 430 450c and 455ca printers 1-1

[close]

p. 12

introduction this chapter will guide you through the relevant steps to take when troubleshooting the printer is the printer using the latest firmware revision before spending time troubleshooting the problem by doing the various tests or replacing parts which may not need replacing check which firmware revision the printer is using to check which firmware revision the printer is using print the service configuration plot page 4 29 some problems which occurred in earlier firmware releases may have been solved in later revisions so if there is a new firmware revision then replace the firmware simm before replacing any parts important information the printer firmware is contained either on a flash rom simm at the back of the printer or on a masked rom inside the electronics module the firmware revision level for example a.01.03 is printed by the printer on the setup sheet and on the service configuration plot the revision level is also printed on a label on any flash rom simm do not open the electronics module important when replacing the electronics module always remember to check the firmware revision level of the new electronics module the revision level will be printed on the top surface of the module also check the firmware revision level of the rom simm installed in the old electronics module with this information you must do the following 1 if the firmware revision level of the rom simm in the old electronics module is lower than the firmware revision level of the new electronics module then you must not install the rom simm into the module 2 if the firmware revision level of the rom simm in the old electronics module is higher than the firmware revision level of the new electronics module then you must install the rom simm into the module example 1 the rom simm firmware revision level is a.01.03 and the firmware revision level of the electronics module is a.01.04 you would use the electronics module without the rom simm installed example 2 the rom simm firmware revision level is a.01.05 and the firmware revision level of the electronics module is a.01.04 you would use the electronics module with the rom simm installed 1-2 hp designjet 430 450c and 455ca printers troubleshooting

[close]

p. 13

what can i do when a system error code appears on the front panel display chapter 2 contains a list of system error codes and their respective descriptions and recommended corrective actions only try one recommended action at a time and check if the error code has disappeared if you have an error code which is not documented in this service manual or you have an error which you cannot resolve then report the error to the hp response center or the nearest hp support office when reporting the error have the following information ready dddddddd model and serial number of the printer which firmware revision the printer is using the complete error code the service configuration plot the current configuration sheet which software application the customer is using name version etc is the problem reproducible by you additional comments about the usage the setting etc have you performed a service test on the failed component/assembly if possible always perform a service test on the component/assembly that you are about to replace just to make sure that is the component/assembly that has failed if the test on that component/assembly passes you should not replace it for information on the service tests and how to use them chapter 4 have you performed the accuracy calibration is the printer calibrated correctly after replacing a component refer to chapter 5 to check when the accuracy calibration is required what can i do to solve print quality problems whenever an print quality problem appears it is advisable to print the print quality plot to help diagnose the problem the print quality print will help you differentiate between possible cartridge errors and other problems such as incorrect front panel selection driver or rip configuration or mechanical problems for information on solving print quality problems chapter 6 troubleshooting hp designjet 430 450c and 455ca printers 1-3

[close]

p. 14

what can i do if the line sensor has problems detecting media 1 excessive ink deposits on the drive roller surface can fool the sensor by reflecting the light clean the drive roller chapter 9 2 line sensor incorrectly calibrated the accuracy calibration includes calibration of the line sensor on the carriage you must use hp matte film when performing the accuracy calibration details chapter 5 otherwise the line sensor will have problems loading some types of media 3 the line sensor is faulty replace the carriage assembly page 8 37 what can i do if the carriage is noisy 1 dirty carriage bushings remove dust particles from the carriage bushings and from the slider rod along which the carriage moves if necessary apply lubricant to the slider rod 2 make sure that the belt is correctly positioned on the y axis motor 3 remove dust particles from the back beam and if necessary apply grease 4 check for a faulty carriage perform the carriage axis test page 4 10 what can i do if the cover sensor isn t working the cover sensor is part of the front panel assembly 1 before troubleshooting make sure that you are not in service mode 1 because the cover sensor is disabled and printer will think that the cover is always closed power off the printer and switch it back on again and check if the cover sensor works 2 check if the cable for the front panel assembly is connected correctly to the electronics module 3 replace the front panel assembly page 8 12 what can i do if the carriage assembly has problems parking in the service station 1 mispositioned trailing cable the trailing cable may be preventing the carriage from reaching the left hand stop make sure that the trailing cable is positioned under the plastic tabs at the back of the carriage cover and not above them 2 the carriage is not at the correct height check and if necessary adjust the carriage height details chapter 5 3 the belt is not correctly positioned over the idler pulley 4 check for a faulty bail lever mechanism because the carriage may have trouble passing over it 1-4 hp designjet 430 450c and 455ca printers troubleshooting

[close]

p. 15

what can i do if the printer continuously rejects cartridges if you are in service mode 1 the cover sensor is disabled in order to test a new cartridge set the printer must be powered of and and on again 1 remove tape and align cartridges one frequent cause of cartridge problems is that the user has forgotten to remove the tape from new cartridges remove the tape 2 dirty pads the connection between the carriage pca and the cartridge flex connector is made by means of a gold bubble on the flex connector that touches a gold pad on the pca the carriage test details page 4 12 includes a test of this connection when nozzle failures occur clean the flex contacts on the cartridge and in the carriage 3 continuity problem remove all the cartridges from the carriage and try installing just the rejected cartridge if the cartridge is still rejected then replace the cartridge with a new one if the new cartridge is not rejected then check one by one if the other cartridges are rejected or not 4 faulty cartridge some black cartridges 51640a with use before dates of april 96 and earlier may have thin film damage this means that the material used for channeling ink behind the nozzles can crack with aging when this happens ink seepage may cause many nozzles to fail eight or more replace the black cartridge with one with use before date of may 96 or later 5 if the cartridges are not inserted correctly into the carriage the cartridges will be rejected make sure that the springs that hold the cartridges in the carriage are not broken or misplaced 6 perform the carriage test page 4 12 7 replace the trailing cable page 8 8 8 replace the carriage assembly page 8 37 troubleshooting hp designjet 430 450c and 455ca printers 1-5

[close]