• Code: 7700 ... 7710
• Description: Offset drum sensor detection error
  • A pulse signal is not entered to ASIC (U7) on the engine controller PWB from the offset drum sensor.
• Causes: Defective drum PWB (KP-999). Defective engine controller PWB (KP-992). Defective harness (2BM2864, 2CK2714) between engine controller PWB (KP-992) and drum unit, or poor contact of the connector terminals.
• Remedy: Replace the drum unit. Replace the engine controller PWB (KP- 992). Check the continuity of the harness (2BM2864, 2CK2714). Check the insertion of connectors.

• Code: 8010
• Description: Feeder motor error (Document finisher)
  • Feeder motor of the DF-31 document finisher does not operate normally.
• Causes: Defective document finisher interface PWB. Defective feeder motor of the DF- 31 document finisher. Defective engine controller PWB (KP-992).
• Remedy: Replace the document finisher interface PWB. Replace feeder motor of the DF-31 document finisher. See DF-31 document finisher’s service manual. Replace the engine controller PWB (KP- 992).

• Code: 8020
• Description: Paper ejection motor error (Document finisher)
  • Paper ejection motor of the DF-31 document finisher does not operate normally.
• Causes: Defective document finisher interface PWB. Defective paper ejection motor of the DF-31 document finisher.
• Remedy: Replace the document finisher interface PWB. Replace paper ejection motor of the DF-31 document finisher. See DF-31 document finisher’s service manual.

• Code: 8140
• Description: Tray elevation motor error (Document finisher)
  • Tray elevation motor of the DF-31 document finisher does not operate normally.
• Causes: Defective document finisher interface PWB. Defective engine controller PWB (KP-992). Defective tray elevation motor of the DF-31 document finisher.
• Remedy: Replace the document finisher interface PWB. Replace the engine controller PWB (KP- 992). Replace tray elevation motor of the DF-31 document finisher. See DF-31 document finisher’s service manual.

• Code: 8170
• Description: Matching board movement motor error (Document finisher)
  • Matching board movement motor of the DF-31 document finisher does not operate normally.
• Causes: Defective document finisher interface PWB. Defective engine controller PWB (KP-992). Defective matching board movement motor of the DF-31 document finisher.
• Remedy: Replace the document finisher interface PWB. Replace the engine controller PWB (KP- 992). Replace matching board movement motor of the DF-31 document finisher. See DF-31 document finisher’s service manual.

• Code: 8210
• Description: Staple movement motor error (Document finisher)
  • Staple movement motor of the DF-31 document finisher does not operate normally.
• Causes: Defective document finisher interface PWB. Defective engine controller PWB (KP-992). Defective staple movement motor of the DF-31 document finisher.
• Remedy: Replace the document finisher interface PWB. Replace the engine controller PWB (KP- 992). Replace staple movement motor of the DF- 31 document finisher. See DF-31 document finisher’s service manual.

• Code: 8230
• Description: Staple motor error (Document finisher)
  • Staple motor of the DF-31 document finisher does not operate normally.
• Causes: Defective document finisher interface PWB. Defective engine controller PWB (KP-992). Defective staple motor of the DF- 31 document finisher.
• Remedy: Replace the document finisher interface PWB. Replace the engine controller PWB (KP- 992). Replace staple motor of the DF-31 document finisher. See DF-31 document finisher’s service manual.

• Code: 8290
• Description: Sorter compatibility error
  • The engine controller PWB (KP-992) does not recognize compatibility of the SO-30 mailbox sorter.
• Causes: The ROM version of mailbox sorter S0-30 main board is not compatible for this printer. Defective mailbox sorter S0-30 main board. Defective engine controller PWB (KP-992).
• Remedy: Replace the ROM of mailbox sorter S0-30 main board for this printer. Replace the sorter SO-30 main board. See SO-30 mailbox sorter’s service manual. Replace the engine controller PWB (KP- 801).