Lexmark T520 Service Manual - Page 131
Transfer Roll Service Check, circumference. Any print quality problems such as lines that are - 80 scheduled maintenance
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4520-xxx Transfer Roll Service Check Service Tip: The transfer roll is 51.02 mm (2.009 inch) circumference. Any print quality problems such as lines that are spaced 51.02 mm apart indicate you should check the transfer roll for damage, toner or foreign material buildup. Service Tip: The transfer roll assembly is part of the Maintenance Kit and is replaced when a '80 Scheduled Maintenance" message displays. Ask the customer if they have replaced the transfer roll recently. CAUTION: Make sure the printer is powered off before making any checks on the transfer roll or associated parts for personal safety and to prevent damage to the printer. FRU Action 1 Transfer Roll Assembly 2 Left Transfer Arm Assembly Check the transfer roll for any signs of toner buildup, surface damage to the roll, oil or other contaminants on the surface of the roll. Replace the transfer roll as necessary. Check the left transfer roll arm assembly to make sure it is fastened and locked in the down position. If the arm is not locked down, check to ensure the arm is not broken and will lock into the EP frame correctly. Check the left transfer arm assembly spring for proper operation. Diagnostic Information 2-103