Lexmark T520 Service Manual - Page 67
Service Checks, Print quality problems: Go
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4520-xxx Service Checks Note: Anytime the engine board is replaced, the Configuration ID must be reset in NVRAM on the new engine board. Go to "Setting Configuration ID" on page 3-20. Review the following information before performing any service checks. • Paper feed problems (especially paper jams): Go to "Viewing the Error Log" on page 3-10 and check the printer error log for indications of repetitive entries that help to isolate a problem to a particular area of the printer or option. • Paper feed problems with error message: Use the "Sub Error Codes for 9XX and 2XX Error Codes" on page 2-8 to help diagnose the problem. • Print quality problems: Go to "Print Quality Test Pages" on page 3-23 and print a test page to help diagnose problems before changing any settings or working on the printer. • Use the resident diagnostics test provided to help isolate a problem before taking the machine apart or removing any options. Diagnostic Information 2-39