Lexmark T620 Service Manual - Page 74
Service Checks, Print Quality Test s - reviews
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4069-5XX/7XX Service Checks Note: Anytime the system board is replaced, the Configuration ID must be reset in NVRAM on the new system board. Go to "Setting Configuration ID" on page 3-31. Review the following information before performing any service checks. • Paper feed problems (especially paper jams): Go to "Viewing the Error Log" on page 3-13 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 3-34 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. 2-46 Service Manual