Using this manual
Purpose
This service manual contains information necessary to test, calibrate, and service the HP Latex 300 printer
series.
For information about using the printer, see the user’s guide.
Chapters
1 Printer systems
Use this chapter as a reference for technical information about the subsystems, components, and how they
work together.
Of particular importance are the diagrams included for each subsystem of the printer. They can be useful for
both troubleshooting and disassembly.
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.
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.
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.
3 System error codes
This chapter contains the system error codes which are displayed on the front panel and by the Embedded
Web Server. Each system error code shown in the chapter has a brief description and the steps required to
solve the error.
Most of the troubleshooting steps involve performing a test or a calibration, which can be found in the
following chapter. Before replacing any part that you suspect of causing the system error code, always
perform the test or calibration.
4 Tests, utilities, and calibrations
Use this chapter whenever you need to perform a diagnostic test, service utility, or service calibration. This
chapter is meant to provide procedures and relevant information, not troubleshooting information. For
troubleshooting information, see the Troubleshooting chapter.
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.
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.
Some diagnostic tests or calibrations must be performed after removing a component.
5 Print quality
This chapter describes the print-quality diagnostic procedures. Further troubleshooting advice can be found
in the user’s guide.
6 Ink supplies
This chapter describes and discusses the components of the ink supply system.
ENWW v
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