• Code: 312.906
• Description: Paper at H-Transport Exit Sensor. Control logic reports paper at the H-Transport Exit Sensor.
• Remedy: Check the following: • Paper on the H-Transport Exit Sensor • Obstructions in the paper path • H-Transport Motor Belt for wear or damage • Guides on the H-Transport Cover for damage, wear or faulty installation
  Enter dc330 Component Control [012-191], H-Transport Exit Sensor. Select Start. Open the H-Transport Cover and actuate the H-Transport Entrance Sensor. The display changes. Y↓ N→Select Stop. Go to Finisher Horizontal Transportation (2 of 2). Check the circuit of the H-Transport Entrance Sensor. Refer to the Transmissive Sensor RAP for troubleshooting procedure. Select Stop. Check the following: • Ensure that the connectors shown in the circuit diagrams are securely connected and that the wires are not damaged. • H-Transport and Finisher for a docking failure • H-Transport Motor and its associated gears and belts for damage, contamination or misalignment If the above checks are OK, then replace the H-Transport Entrance Sensor (PL 24.4 Item 12). If the problem persists, replace the Finisher Main PWB.

• Code: 312.907
• Description: Paper at Top Tray Exit Sensor. Control logic reports paper at the Top Tray Exit Sensor.
• Remedy: • Paper on the Top Tray Exit Sensor • Obstructions in the paper path
  Enter dc330 Component Control [012-115], Top Tray Exit Sensor (PL 24.38 Item 11). Select Start. Actuate the Top Tray Exit Sensor. The display changes. Y↓ N→Select Stop. Go to Finisher Top Tray Stacking. Check the circuit of the Top Tray Exit Sensor. Refer to the Transmissive Sensor RAP for troubleshooting procedure. Select Stop. Check the following: • Ensure that the connectors shown in the circuit diagrams are securely connected and that the wires are not damaged • Exit Motor Belt for wear or damage • Exit Drive Shaft Rolls for wear or damage • Exit Pinch Rollers for wear or damage • Synchronous Belt for wear or damage If the above checks are OK, then replace the Top Tray Exit Sensor. If the problem continues, replace the Finisher Main PWB.

• Code: 312.910
• Description: Staple Ready Sensor Fault. Staple Ready Sensor is turned off at stapling start.
• Remedy: Enter dc330 Component Control [012-243], Stapler Ready Sensor, (part of Stapler Assembly) (PL 24.33 Item 2). Select Start. Block/unblock the Stapler Ready Sensor. The display changed. Y↓ N→Select Stop. Go to Finisher Stapler Control. Check continuity between the Stapler Ready Sensor and Finisher PWB. The continuity check is OK. Y↓ N→Repair the open circuit or short circuit. Replace the Stapler (PL 24.33 Item 2). If the problem continues, replace the Finisher Main PWB. Select Stop. Check the following: • Wiring between the Stapler and the Finisher PWB • Obstructions on the Stapler Upper Rail • Stapler Move Motor Gear If the above checks are OK. replace the Finisher Main PWB.

• Code: 312.911
• Description: Stacker Lower Safety Warning. The Height Alignment was not successful within 250msec when the Height Adjustment was performed for output paper to the Stacker Tray (Tray lowering down) in the middle of a job.
• Remedy: Remove all paper from the Stacker. If the problem continues, go to RAP 312.213 (SB).

• Code: 312.914
• Description: Stacker Tray Stapled Set Over Count. The Staple Set Count of the Stacker Tray has exceeded 50 sets during the Staple Set Eject operation
• Remedy: Remove all paper from the Stacker. If the problem continues, go to the RAP 312.161 (SB).

• Code: 312.916
• Description: Stapler NG. The Staple Home Sensor has not switched from Off to On within the specified time after the Staple Motor started rotating forward. The Staple Head Home Sensor turned On within xxx msec. after the Staple Motor reversed.
• Remedy: • The Actuator for deformation • The Staple Home Sensor for improper installation • The Staple Home Sensor connectors for connection failure • The Staple Guide for a foreign substance and deformation • The Staple Motor for operation failure • The Staple Motor connectors for connection failure
  Enter dc330 Component Control [012-046] and [012-047], Staple Motor (PL 24.33 Item 9), alternately. Select Start. The Staple Motor energizes. Y↓ N→Select Stop. Go to Finisher Stapler Control. Check continuity between the Stapler Assembly and Finisher PWB. The continuity check is OK. Y↓ N→Repair the open circuit or short circuit. Replace the Stapler Assembly. If the problem continues, replace the Finisher Main PWB. Select Stop. Select [012-244], Staple Home Sensor, (part of Stapler Assembly) (PL 24.33). Select [012-046] and [012-047], Staple Motor (PL 24.33), alternately. Select Start. The display changes. Y↓ N→Select Stop. Go to Finisher Stapler Control. Check continuity between the Stapler and Finisher PWB. The continuity check is OK. Y↓ N→Repair the open circuit or short circuit. Replace the Stapler Assembly. If the problem continues, replace the Finisher Main PWB. Select Stop. If the problem continues, replace the Finisher Main PWB.

• Code: 312.920
• Description: Paper at Gate Sensor (Top Tray Job). Control logic reports paper at the Gate Sensor.
• Remedy: • Check for obstructions in the paper path • Check the Finisher Drive Motor Gears and Drive rolls for wear or damage
  Enter dc330 Component Control [012-102], Gate Sensor (PL 24.43 Item 19). Select Start. Actuate the Gate Sensor. The display changes. Y↓ N→Select Stop. Go to Finisher Transport, Top Tray Gating. Check the circuit of the Gate Sensor. Refer to the Transmissive Sensor RAP for troubleshooting procedure. Select Stop. Check the following: • Ensure that the connectors shown in the circuit diagrams are securely connected and that the wires are not damaged. • Check the Finisher is docked properly • Check the Finisher Transport Motor and its associated gears and belts for damage, contamination or misalignment. If the above checks are OK, then replace the Gate Sensor. If the problem persists, replace the Finisher Main PWB.

• Code: 312.921
• Description: Paper at Gate Sensor (Compiler Path Job). Control logic reports paper at the Gate Sensor.
• Remedy: • Check for obstructions in the paper path • Check the Finisher Drive Motor Gears and Drive rolls for wear or damage
  Enter dc330 Component Control [012-102], Gate Sensor (PL 24.43 Item 19). Select Start. Actuate the Gate Sensor. The display changes. Y↓ N→Select Stop. Go to Finisher Transport, Top Tray Gating Check the circuit of the Gate Sensor. Refer to the Transmissive Sensor RAP for troubleshooting procedure. Select Stop. Check the following: • Ensure that the connectors shown in the circuit diagrams are securely connected and that the wires are not damaged. • Check the Finisher is docked properly • Check the Finisher Transport Motor and its associated gears and belts for damage, contamination or misalignment. If the above checks are OK, then replace the Gate Sensor. If the problem persists, replace the Finisher Main PWB.