HP LaserJet Pro M402d

Troubleshooting process
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Determine the problem source
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Power subsystem
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Control panel checks
Determine the problem source
When the printer malfunctions or encounters an unexpected situation, the printer control panel alerts the
user to the situation. This section contains a pre-troubleshooting checklist to
lter out many possible causes
of the problem. Use the troubleshooting owchart to help diagnose the root cause of the problem. The
remainder of this chapter provides steps for correcting problems.
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Use the troubleshooting owchart to pinpoint the root cause of hardware malfunctions. The owchart
provides guides to the sections of this chapter that contain steps to correct the malfunction.
Before beginning any troubleshooting procedure, check the following issues:
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Are supply items within their rated life?
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Does the conguration page reveal any conguration errors?
NOTE: The customer is responsible for checking supplies and for using supplies that are in good condition.
Pre-troubleshooting checklist
The following table includes basic questions to ask the customer to quickly help dene the problem(s).
General topic Questions
Environment
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Is the printer installed on a solid, level surface (+/- 1°)?
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Is the power-supply voltage within ± 10 volts of the specied power source?
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Is the power-supply plug inserted in the printer and the outlet?
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Is the operating environment within the specied parameters?
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Is the printer exposed to ammonia gas, such as that produced by diazo copiers or
oice cleaning materials?
NOTE: Diazo copiers produce ammonia gas as part of the copying processes.
Ammonia gas (from cleaning supplies or a diazo copier) can have an adverse eect
on some printer components (for example, the toner cartridge OPC).
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Is the printer exposed to direct sunlight?
Media
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Does the customer use only supported media?
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Is the media in good condition (no curls, folds, or distortion)?
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Is the media stored correctly and within environmental limits?
Input trays
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Is the amount of media in the tray within specications?
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Is the media correctly placed in the tray?
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Are the paper guides aligned with the stack?
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Is the tray correctly installed in the printer?
44 Chapter 2 Solve problems ENWW