• Code: 7001
• Description: Black toner feed motor lock
  • The revolution of the black toner feed motor does not reach the predetermined revolution within the predetermined period when ASIC (U8) on the engine controller PWB (KP-801) activates the black toner feed motor.
• Causes: Defective engine controller PWB (KP-801). Defective black developer (Black developer PWB [KP-817]). Defective harness (S02547) between engine controller PWB (KP-801) and black developer, or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective black developer (Black developer PWB [KP-817]). Replace the black developer.
  Defective harness (S02547) between engine controller PWB (KP-801) and black developer, or poor contact of the connector terminals. Check the continuity of the harness (S02547). Check the insertion of connectors.

• Code: 7002
• Description: Cyan toner feed motor lock
  • The revolution of the cyan toner feed motor does not reach the predetermined revolution within the predetermined period when ASIC (U8) on the engine controller PWB (KP-801) activates the cyan toner feed motor.
• Causes: Defective engine controller PWB (KP-801). Defective cyan developer (Cyan developer PWB [KP-815]). Defective harness (S02547) between engine controller PWB (KP-801) and cyan developer, or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective cyan developer (Cyan developer PWB [KP-815]). Replace the cyan developer.
  Defective harness (S02547) between engine controller PWB (KP-801) and cyan developer, or poor contact of the connector terminals. Check the continuity of the harness (S02547). Check the insertion of connectors.

• Code: 7003
• Description: Magenta toner feed motor lock
  • The revolution of the magenta toner feed motor does not reach the predetermined revolution within the predetermined period when ASIC (U8) on the engine controller PWB (KP-801) activates the magenta toner feed motor.
• Causes: Defective engine controller PWB (KP-801). Defective magenta developer (Magenta developer PWB [KP-815]). Defective harness (S02546) between engine controller PWB (KP-801) and magenta developer, or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective magenta developer (Magenta developer PWB [KP-815]). Replace the magenta developer.
  Defective harness (S02546) between engine controller PWB (KP-801) and magenta developer, or poor contact of the connector terminals. Check the continuity of the harness (S02546). Check the insertion of connectors.

• Code: 7004
• Description: Yellow toner feed motor lock
  • The revolution of the yellow toner feed motor does not reach the predetermined revolution within the predetermined period when ASIC (U8) on the engine controller PWB (KP-801) activates the yellow toner feed motor.
• Causes: Defective engine controller PWB (KP-801). Defective yellow developer (Yellow developer PWB [KP-847]). Defective harness (S02546) between engine controller PWB (KP-801) and yellow developer, or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective yellow developer (Yellow developer PWB [KP-847]). Replace the yellow developer.
  Defective harness (S02546) between engine controller PWB (KP-801) and yellow developer, or poor contact of the connector terminals. Check the continuity of the harness (S02546). Check the insertion of connectors.

• Code: 7101
• Description: Black T/C sensor toner density detection error
  • A normal toner density signal is not entered in the A/D port of CPU (U2) on the engine controller PWB (KP- 801).
• Causes: Defective engine controller PWB (KP-801). Defective black developer (black developer PWB [KP-817] or black T/C sensor). Defective black developer. (black toner feed motor does not rotate in the correct revolution.) Defective harness (S02547) between engine controller PWB (KP-801) and black developer, or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective black developer (black developer PWB [KP-817] or black T/C sensor). Replace the black developer.
  Defective black developer. (black toner feed motor does not rotate in the correct revolution.) Replace the black developer.
  Defective harness (S02547) between engine controller PWB (KP-801) and black developer, or poor contact of the connector terminals. Check the continuity of the harness (S02547). Check the insertion of connectors.

• Code: 7102
• Description: Cyan T/C sensor toner density detection error
  • A normal toner density signal is not entered in the A/D port of CPU (U2) on the engine controller PWB (KP- 801).
• Causes: Defective engine controller PWB (KP-801). Defective cyan developer (cyan developer PWB [KP-815] or cyan T/C sensor). Defective cyan developer. (cyan toner feed motor does not rotate in the correct revolution.) Defective harness (S02547) between engine controller PWB (KP-801) and cyan developer, or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective cyan developer (cyan developer PWB [KP-815] or cyan T/C sensor). Replace the cyan developer.
  Defective cyan developer. (cyan toner feed motor does not rotate in the correct revolution.) Replace the cyan developer.
  Defective harness (S02547) between engine controller PWB (KP-801) and cyan developer, or poor contact of the connector terminals. Check the continuity of the harness (S02547). Check the insertion of connectors.

• Code: 7103
• Description: Magenta T/C sensor toner density detection error
  • A normal toner density signal is not entered in the A/D port of CPU (U2) on the engine controller PWB (KP- 801).
• Causes: Defective engine controller PWB (KP-801). Defective magenta developer (magenta developer PWB [KP-815] or magenta T/C sensor). Defective magenta developer. (magenta toner feed motor does not rotate in the correct revolution.) Defective harness (S02546) between engine controller PWB (KP-801) and magenta developer, or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective magenta developer (magenta developer PWB [KP-815] or magenta T/C sensor). Replace the magenta developer.
  Defective magenta developer. (magenta toner feed motor does not rotate in the correct revolution.) Replace the magenta developer.
  Defective harness (S02546) between engine controller PWB (KP-801) and magenta developer, or poor contact of the connector terminals. Check the continuity of the harness (S02546). Check the insertion of connectors.

• Code: 7104
• Description: Yellow T/C sensor toner density detection error
  • A normal toner density signal is not entered in the A/D port of CPU (U2) on the engine controller PWB (KP- 801).
• Causes: Defective engine controller PWB (KP-801). Defective yellow developer (yellow developer PWB [KP-815] or yellow T/C sensor). Defective yellow developer. (yellow toner feed motor does not rotate in the correct revolution.) Defective harness (S02546) between engine controller PWB (KP-801) and yellow developer, or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective yellow developer (yellow developer PWB [KP-815] or yellow T/C sensor). Replace the yellow developer.
  Defective yellow developer. (yellow toner feed motor does not rotate in the correct revolution.) Replace the yellow developer.
  Defective harness (S02546) between engine controller PWB (KP-801) and yellow developer, or poor contact of the connector terminals. Check the continuity of the harness (S02546). Check the insertion of connectors.