• Code: 917
• Description: Toner empty sensor connection error 2 (TTR)
• Remedy: 1 Turn printer off and remove I/O board shield. Is cable properly connected to I/O board connector DCN15? Go to step 2. Properly connect cable. Retest printer. If error clears, problem solved, otherwise go to step 2.
  2 Turn printer off and replace I/O board. Retest printer. Does error clear? Problem solved. Go to step 3.
  3 Check cable that connects engine controller board connector I1CN to I/O board connector DCN1 for continuity and pin shorts. Is cable okay? Go to step 4. Replace cable. Retest printer. If error clears, problem solved, otherwise go to step 4.
  4 Turn printer off and replace engine controller board. Retest printer. Does error clear? Problem solved. Turn printer off and replace toner empty sensor (receiver- TTR).

• Code: 918
• Description: High voltage power supply connection error
• Remedy: 1 Turn printer off and remove engine controller board shield. Is cable properly connected to engine controller board HVCN connector? Go to step 2. Properly connect cable. Retest printer. If error clears, problem solved, otherwise go to step 2.
  2 Turn printer off and remove items to expose HVPS. Check for continuity and pin shorts of cable that connects engine controller board HVCN and HVPS CN1. Is cable okay? Replace HVPS. Retest printer. If error clears, problem solved, otherwise turn printer off and replace engine controller board. Replace cable. Retest printer. If error clears, problem solved, otherwise turn printer off and replace engine controller board.

• Code: 919
• Description: Secondary paper feed assembly error
• Remedy: 1 Turn printer off and remove I/O board shield. Is cable properly connected to I/O board connector DCN14? Go to step 2. Properly connect cable. Retest printer. If error clears, problem solved, otherwise go to step 2.
  2 Remove right cover. Check for continuity and pin shorts of cable that connects I/O board DCN14 and lower feed unit connector. Is cable okay? Go to step 3 Replace cable. Retest printer. If error clears, problem solved, otherwise go to step 3.
  3 Replace lower feed unit. Does error clear? Problem solved. Go to step 4.
  4 Replace I/O board. Does error clear? Problem solved. Go to step 5.
  5 Turn printer off and check cable that connects engine controller board connector I1CN to I/O board connector DCN1 for continuity and pin shorts. Is cable okay? Replace engine controller board. Replace cable.

• Code: 920
• Description: Fuser thermistor error
• Remedy: 1 Remove and reinstall fuser assembly. Does error clear? Problem solved. Go to step 2.
  2 Check fuser connector for damage. Replace if necessary. Does error clear? Problem solved. Go to step 3.
  3 Turn printer off and check cable that connects engine controller board connector FUCN to fuser for proper connection, continuity and pin shorts. Is cable okay? Go to step 4. Properly connect cable or replace if damaged. If error clears, problem solved, otherwise go to step 4.
  4 Replace fuser assembly. Does error clear? Note: Fuser is a customer order supply. Problem solved. Replace engine controller board.

• Code: 921
• Description: Fuser temperature error
• Remedy: 1 Check for proper input line voltage. Is line voltage correct? Go to step 2. Provide proper line voltage.
  2 Remove and reinstall fuser assembly. Does error clear? Problem solved. Go to step 3.
  3 Check fuser connector for damage. Replace if necessary. Does error clear? Problem solved. Go to step 4.
  4 Turn printer off and check cable that connects engine controller board connector FUCN to fuser for proper connection, continuity, and pin shorts. Is cable okay? Go to step 5. Properly connect cable or replace if damaged. If error clears, problem solved, otherwise go to step 5.
  5 Replace fuser assembly. Does error clear? Note: Fuser is a customer ordered supply. Problem solved. Replace LVPS. If error does not clear, replace engine controller board.

• Code: 922
• Description: Fuser temperature error
• Remedy: 1 Check for proper input line voltage. Is line voltage correct? Go to step 2. Provide proper line voltage.
  2 Remove and reinstall fuser assembly. Does error clear? Problem solved. Go to step 3.
  3 Check fuser connector for damage. Replace if necessary. Does error clear? Problem solved. Go to step 4.
  4 Turn printer off and check cable that connects engine controller board connector FUCN to fuser for proper connection, continuity, and pin shorts. Is cable okay? Go to step 5. Properly connect cable or replace if damaged. If error clears, problem solved, otherwise go to step 5.
  5 Replace fuser assembly. Does error clear? Note: Fuser is a customer ordered supply. Problem solved. Replace LVPS. If error does not clear, replace engine controller board.

• Code: 923
• Description: Fuser temperature error
• Remedy: 1 Check for proper input line voltage. Is line voltage correct? Go to step 2. Provide proper line voltage. 2 Remove and reinstall fuser assembly. Does error clear? Problem solved. Go to step 3. 3 Check fuser connector for damage. Replace if necessary. Does error clear? Problem solved. Go to step 4. 4 Turn printer off and check cable that connects engine controller board connector FUCN to fuser for proper connection, continuity, and pin shorts. Is cable okay? Go to step 5. Properly connect cable or replace if damaged. If error clears, problem solved, otherwise go to step 5. 5 Replace fuser assembly. Does error clear? Note: Fuser is a customer ordered supply. Problem solved. Replace LVPS. If error does not clear, replace engine controller board.

• Code: 924
• Description: Fuser temperature error
• Remedy: 1 Check for proper input line voltage. Is line voltage correct? Go to step 2. Provide proper line voltage.
  2 Remove and reinstall fuser assembly. Does error clear? Problem solved. Go to step 3.
  3 Check fuser connector for damage. Replace if necessary. Does error clear? Problem solved. Go to step 4.
  4 Turn printer off and check cable that connects engine controller board connector FUCN to fuser for proper connection, continuity, and pin shorts. Is cable okay? Go to step 5. Properly connect cable or replace if damaged. If error clears, problem solved, otherwise go to step 5.
  5 Replace fuser assembly. Does error clear? Note: Fuser is a customer ordered supply. Problem solved. Replace LVPS. If error does not clear, replace engine controller board.