• Code: 900
• Description: RIP Software
• Remedy: Contact customer service center, or Lexmark support center

• Code: 901
• Description: Yellow Developer Clutch Error (DCLY)
  This error indicates a yellow developer problem.
• Remedy: 1 Check Connector Ensure the DCLY connector ENC14 on the IOD2 P.W.B. board is firmly connected. Connect if necessary.
  2 Yellow Developer Clutch (DCLY) Check the voltage between ECN14-3 and ECn2-6 on the IOD2, P.W.B. board. If the voltage drops below +24V, replace the yellow developer clutch DCLY.
  3 IOD2 P.W.B. Board Check the voltage between ECN1-3 and ECN2-8 on the IOD2 P.W.B. board. If the voltage jumps to +24V, replace the IOD2 P.W.B. board.
  4 Main Engine (MCTL P.W.B.) Board If this does not correct the problem, replace the main engine (MCTL P.W.B.) board.

• Code: 902
• Description: Magenta Developer Clutch Error (DCLM)
  This error indicates a magenta developer problem.
• Remedy: 1 Check Clutch Ensure the magenta developer clutch (DCLM) connector ECN15 on the IOD2 P.W.B. board is firmly connected.
  2 Magenta Developer Clutch (DCLM) Check the voltage between ECN15-3 and ECN2-6 on the IOD2 P.W.B. board. If the voltage drops below +24V, replace the magenta developer clutch (DCLM).
  3 IOD2 P.W.B. Board Check the voltage between ECN1-2 and ECN2-8 on the IOD2 P.W.B. board. If the voltage jumps to +24V, replace the IOD2 P.W.B. board.
  4 Main Engine (MCTL P.W.B.) Board If the problem still exists, replace the main engine (MCTL P.W.B.) board.

• Code: 903
• Description: Cyan Developer Clutch Error (DCLC)
  This error indicates a cyan developer problem
• Remedy: 1 Check Clutch Ensure the cyan developer clutch (DCLC) connector ECN16 on the IOD2 P.W.B. board is properly connected.
  2 Cyan Developer Clutch (DCLC) Check the voltage between ECN16-3 and ECN2-6 on the IOD2 P.W.B. board. If the voltage drops below +24V, replace the Cyan Developer (DCLC).
  3 IOD2 P.W.B. Board Check the voltage between ECN1-1 and ECN2-8 on the IOD2 P.W.B. board. If the voltage jumps to +24V, replace the IOD2 P.W.B. board.
  4 Main Engine (MCTL P.W.B.) Board If the problem still exists, replace the main engine (MCTL P.W.B.) board.

• Code: 904
• Description: Black Developer Clutch Error (DCLK)
  This error indicates a black developer problem.
• Remedy: 1 Check Clutch Ensure the black developer clutch (DCLK) connector ECN13 on IOD2 P.W.B. board is properly connected.
  2 Black Developer Clutch (DCLK) Check the voltage between ECN13-3 and ECN2-6. If the voltage drops below +24V, replace the black developer clutch (DCLK).
  3 IOD2 P.W.B. Board Check the voltage between ECN1-4 and ECN2-8. If the voltage does not jump to +24V, replace the IOD2 P.W.B. board.
  4 Main Engine (MCTL P.W.B.) Board If the problem still exists, replace the main engine (MCTL P.W.B.) board.

• Code: 905
• Description: YK Developer Solenoid Error (YK PSL)
  This error indicates the yellow/black developer switching has a problem.
• Remedy: 1 Check Connector Check Cable Harness Ensure the black/yellow solenoid connector ECN5 on the IOD2 P.W.B. board is connected. Ensure the cable harness for the solenoid (PSL KY) is not broken. Replace any damaged parts.
  2 Developer Solenoid Assembly (PSL KY/ MC) Front Cover Unit Check the voltage at (PSL KY) ON-N. Does the voltage drop below +24V between ECN5-10 and ECN2-6? • If the voltage drops below +24V, replace the DE solenoid assembly. • If this doesn’t fix the problem, replace the front cover unit.
  3 IOD2 P.W.B. Board Check the voltage between ECN1-5 and ECN2-8. If the voltage jumps to +24V, replace the IOD2 P.W.B. board.
  4 Main Engine (MCTL P.W.B.) Board If the problem still exists, replace the main engine (MCTL P.W.B.) board.

• Code: 906
• Description: MC Solenoid Error (MC PSL)
  This error indicates the magenta/cyan developer switching has a problem.
• Remedy: 1 Check Connector Check Cable Harness Ensure the magenta/cyan solenoid connector ECNS on the IOD2 P.W.B. board is connected. Ensure the cable harness for (PSL MC) is not broken. Replace any damaged parts.
  2 Developer Solenoid Assembly (PSL KY/MC) Front Cover Unit Check the voltage at (PSL MC) ON-N. Does the voltage drop below +24V between ECN5-7 and ECN2-6? • If the voltage drops below +24V, replace the DE solenoid assembly. • If this does not fix the problem, replace the front cover unit.
  3 IOD2 P.W.B. Board Check the voltage between ECN1-6 and ECN2-8. If the voltage jumps to +24V, replace the IOD2 P.W.B. board.
  4 Main Engine (MCTL P.W.B.) Boards If the problem still exists, replace the main engine (MCTL P.W.B.) board.

• Code: 907
• Description: Toner Empty Sensor Error (TPD, TTR)
  This error indicates the toner empty sensor has a problem.
• Remedy: 1 Check Connector Ensure the toner empty sensor (LED) connector is connected correctly to DCN7 on IOD1 P.W.B. board.
  2 • Toner Sensor, P.W.B. Board (LED side) • IOD1 P.W.B. Board Check the voltage for (LEDON-N/D) If the voltage jumps to +24V between DCN7-7 and DCN7-9 on the IOD1 P.W.B. board, replace the toner sensor P.W.B. board. If the voltage drops to less than +24V between DCN1-15 and DCN1-41 on the IOD1 P.W.B. board, replace the IOD1 P.W.B. board.
  3 Main Engine (MCTL P.W.B.) Board If the error still exists, replace the main engine (MCTL P.W.B.) board.