Lexmark C780 Service Manual - Page 179
Diagnostic aids, Diagnostic procedures, Printhead diagnostics
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5061 3. Diagnostic aids This chapter explains the tests and procedures to identify printer failures and verify repairs have corrected the problem. Diagnostic procedures Printhead diagnostics If you get a printhead error, follow this diagnostic to find the specific failure. 1. Remove the top cover. See "Top cover assembly removal" on page 4-13. 2. Remove the outer system board shield. See "Outer system board shield removal" on page 4-69. 3. Verify that all the connectors are properly seated. Check the printhead cable connectors on the printheads as well as the printhead cable connectors and mirror motor cable connectors on the system board. If the printhead and mirror motor cables are properly seated and the error remains, record the error code. Continue to the next step. Diagnostic aids 3-1
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