Lexmark C720 Service Manual - Page 112

5024-001 Symptom Tables Printer Symptom Table Symptom Operator Panel buttons do not work Operator Panel display is blank, printer beeps 5 times Operator Panel continuously displays all diamonds and beeps 5 times Operator Panel display is blank, but printer does not beep Paper Feed problem with the base printer, including paper jam 201 and 202 Close Door displayed when all doors are closed Printer does not reset or change User Settings Paper Jam Messages do not rest after removing paper Toner Cartridge does not turn or does not put toner on the OPC Belt Cartridge The Developer Motor (DM) makes noise or continuously runs Action Go to "Operator Panel Service Check" on page 2-70. Go to "Operator Panel Service Check" on page 2-70. Go to "Operator Panel Service Check" on page 2-70. Replace the operator panel assembly. Go to "Paper Feed Service Checks" on page 2-77. 23x see "Duplex Paper Feed Service Check" on page 2-81. 24x see "Lower Feed Unit Paper Feed Service Check" on page 2-79. Go to "Operator Messages" on page 2-9 and follow the action to be taken. Go to "Operator Messages" on page 2-9 and follow the action to be taken. Go to "Operator Messages" on page 2-9 and follow the action to be taken. Go to "Toner Feed Service Check" on page 2-75. Go to "910-Developer Motor (DM) Drive Service Check" on page 2-45. 2-32 Service Manual