5 Print quality This chapter describes the print-quality diagnostic procedures. Some diagnostic tests or calibrations must be performed after removing a component.
The goal of diagnostic tests is to locate the root cause of the problem and the corresponding system error code or message that will provide you with logical steps to resolution. These procedures are described in full, so that you know any relevant values for the test, as well as information about what the printer is actually doing during the test.
For troubleshooting information, see the Troubleshooting chapter. This chapter is meant to provide procedures and relevant information, not troubleshooting information. 4 Service tests, utilities, and calibrations Use this chapter whenever you need to perform a diagnostic test, service utility, or service calibration. Before replacing any part that you suspect of causing the system error code, always perform the test or calibration. Most of the troubleshooting steps involve performing a test or a calibration, which can be found in the following chapter. Each system error code shown in the chapter has a brief description and the steps required to solve the error. 3 System error codes This chapter contains the system error codes which are displayed on the front panel and by the Embedded Web Server. This chapter does not cover the procedures for the diagnostic tests you must perform while troubleshooting, nor the replacement procedures you must complete to fix the problem. Troubleshooting always begins with a problem so, when you enter the chapter, navigate to the proper section and find the troubleshooting steps for your problem. 2 Troubleshooting Whenever a printer is not functioning correctly due to a fault, use this chapter for step-by-step diagnosis until you arrive at the solution, which may include replacing a part. They can be useful for both troubleshooting and disassembly. Of particular importance are the diagrams included for each subsystem of the printer. Chapters 1 Printer systems Use this chapter as a reference for technical information about the subsystems, components, and how they work together. For information about using the printer, see the user guide.
Using this manual Purpose This service manual contains information necessary to test, calibrate, and service the HP Latex 500 printer series. Do not proceed beyond a Caution symbol until the indicated conditions are fully understood and met. The Caution symbol 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 printer.Do not proceed beyond a Warning symbol until the indicated conditions are fully understood and met. The Warning symbol calls attention to a procedure, practice, or the like, which, if not correctly performed or adhered to, could result in personal injury.Safety symbols Serious hazards leading to death, injury, or damage may result if you do not take the following precautions: Electrostatic discharge See the beginning of Chapter 4 of this manual for precautions you should take to prevent damage to the printer circuits from electrostatic discharge. Prevent water or any other liquids from running onto electrical components or circuits, or through openings in the enclosure.The rear switch is not the disconnecting device, unplug all power cords before servicing the printer. Disconnect the printer (both power cords) from the power source performing any maintenance or servicing operation.Ensure that the AC power outlet (mains) has a protective earth (ground) terminal.Safety The procedures described in this manual are to be performed by HP-qualified service personnel only. HP 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. HP 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.
The information contained in this document is subject to change without notice. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of HP. This document contains proprietary information that is protected by copyright.
© Copyright 2016, 2017 HP Development Company, L.P.
HP Latex 500 Printer Series Service Manual