• Code: 012-959
• Description: Full Stack was Detected Stacker No Paper Sensor On was detected during the Stacker Tray height adjusting operation.
• Remedy: • Check the Stacker No Paper Sensor for improper installation. • Check the Stacker No Paper Sensor connectors for connection failure. • Check the Elevator Motor for operation failure. • Check the Elevator Motor connectors for connection failure. CAUTION Caution must be used when activating Elevator Motor test. When activating this test in the Down position, there is no limit sensor for downward Stacker travels. Downward steps increment (or decrement) in single steps, not 5. When continuing in the Down direction, DO NOT continue after an initial thump sound is heard. Further downward movements may cause damage to the Stacker Unit/Finisher.
  Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Perform the Elevator Motor test (PL 21.4), alternately. The Elevator Motor energizes. Y↓N→Check continuity between the Elevator Motor and Finisher PWB. The continuity check is OK. Y↓N→Repair the open circuit or short circuit. Replace the Elevator Motor (PL 21.4). If the problem continues, replace the Finisher PWB. Block/unblock the Stacker No Paper Sensor (PL 21.4). The display changes. Y↓N→Check continuity between the Stacker No Paper Sensor and Finisher PWB. The continuity check is OK. Y↓N→Repair the open circuit or short circuit. Replace the Stacker No Paper Sensor (PL 21.4). If the problem continues, replace the Finisher PWB (PL 21.12). Block/unblock the Stacker Encoder Sensor (PL 21.4). The display changes. Y↓N→Check continuity between the Stacker Encoder Sensor and Finisher PWB. The continuity check is OK. Y↓N→Repair the open circuit or short circuit. Replace the Stacker Encoder Sensor (PL 21.4). If the problem continues, replace the Finisher PWB (PL 21.12). If the problem continues, replace the Finisher PWB (PL 21.12).

• Code: 012-960
• Description: Full Stack was Detected (Finisher) Stacker No Paper Sensor On was detected during the Stacker Tray height adjusting operation.
• Remedy: • Check the Stacker No Paper Sensor for improper installation. • Check the Stacker No Paper Sensor connectors for connection failure. • Check the Elevator Motor for operation failure. • Check the Elevator Motor connectors for connection failure. CAUTION Caution must be used when activating Elevator Motor test. When activating this test in the Down position, there is no limit sensor for downward Stacker travels. Downward steps increment (or decrement) in single steps, not 5. When continuing in the Down direction, DO NOT continue after an initial thump sound is heard. Further downward movements may cause damage to the Stacker Unit/Finisher. Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Perform the Elevator Motor test alternately. The Elevator Motor (PL 21.4) energizes. Y↓N→Check continuity between the Elevator Motor and Finisher PWB. The continuity check is OK, Y↓N→Repair the open circuit or short circuit. Replace the Elevator Motor (PL 21.4). If the problem continues, replace the Finisher PWB. Block/unblock the Stacker Encoder Sensor (PL 21.4). The display changes. Y↓N→Check continuity between the Stacker Encoder Sensor and Finisher PWB. The continuity check is OK, Y↓N→Repair the open circuit or short circuit. Replace the Stacker Encoder Sensor (PL 21.4). If the problem continues, replace the Finisher PWB. Block/unblock the Stacker No Paper Sensor (PL 21.4). The display changes. Y↓N→Check continuity between the Stacker No Paper Sensor and Finisher PWB. The continuity check is OK, Y↓N→Repair the open circuit or short circuit. Replace the Stacker No Paper Sensor (PL 21.4). If the problem continues, replace the Finisher PWB. If the problem continues, replace the Finisher PWB (PL 21.12).

• Code: 012-961
• Description: Mix Stack was Detected Mix Stack Sensor On was detected during Mix Job.
• Remedy: • Check the Elevator Motor for operation failure. • Check the Elevator Motor connectors for connection failure. CAUTION Caution must be used when activating Elevator Motor test. When activating this test in the Down position, there is no limit sensor for downward Stacker travels. Downward steps increment (or decrement) in single steps, not 5. When continuing in the Down direction, DO NOT continue after an initial thump sound is heard. Further downward movements may cause damage to the Stacker Unit/Finisher.
  Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Verify that NVRAM location Printer/Finisher 2274 is set to 0. NVM Printer/Finisher 2274 is set to 0. Y↓N→Write a value of 0 in Printer/Finisher 2274. Perform the Elevator Motor test (PL 21.4). The Elevator Motor energizes. Y↓N→Check continuity between the Elevator Motor and Finisher PWB. The continuity check is OK. Y↓N→Repair the open circuit or short circuit. Replace the Elevator Motor (PL 21.4). If the problem continues, replace the FInisher PWB (PL 21.12). If the problem continues, replace the Finisher PWB (PL 21.12).

• Code: 012-978
• Description: Booklet Stapler NG Error signal On and Ready signal On output from the Staple were detected after Booklet Stapling operation.
• Remedy: Check continuity between the Booklet PWB and Finisher PWB. The continuity check is OK. Y↓N→Repair the open circuit or short circuit. Replace the Staple (PL 21.16). The problem resolved. Y↓N→Replace the Booklet PWB (PL 21.12). If the problem continues, replace the Finisher PWB (PL 21.12). If the problem continues, replace the Finisher PWB (PL 21.12).

• Code: 012-983
• Description: Booklet Tray Full was Detected Booklet Tray Full was detected.
• Remedy: Remove all sets. Perform the job again. The problem is resolved. Y↓N→Replace the Finisher PWB (PL 21.12). If the problem continues, replace the Finisher PWB (PL 21.12).

• Code: 012-984
• Description: Booklet Low Staple F Booklet Stapler Low Staple Front signal was detected just before Stapling operation. Booklet Stapler Low Staple Front signal was detected at Power On, at initialization, or when the interlock was closed.
• Remedy: Supply the staples. The problem is resolved. Y↓N→Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Actuate the Booklet Stapler Low Staple Front. ‘LOW’ (staples available) is displayed. Y↓N→Check continuity between the Staple and Booklet PWB, and between the Booklet PWB and Finisher PWB. The continuity check is OK. Y↓N→Repair the open circuit or short circuit. Replace the Booklet Stapler Low Staple Front (PL 21.16). If the problem continues, replace the Finisher PWB (PL 21.12). Replace the Finisher PWB (PL 21.12). If the problem continues, replace the Booklet PWB (PL 21.12). If the problem continues, replace the Finisher PWB (PL 21.12). If the problem persists, replace the Booklet PWB (PL 21.12).

• Code: 012-989
• Description: Booklet Low Staple R Booklet Stapler Low Staple Rear signal was detected just before Stapling operation. Booklet Stapler Low Staple Rear signal was detected at Power On, at initialization, or when the interlock was closed.
• Remedy: Supply the staples. The problem is resolved. Y↓N→Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Actuate the Booklet Stapler Low Staple Rear. ‘LOW’ (staples available) is displayed Y↓N→Check continuity between the Staple and Booklet PWB, and between the Booklet PWB and Finisher PWB. The continuity check is OK. Y↓N→Repair the open circuit or short circuit. Replace the Booklet Stapler Low Staple Rear (PL 21.16). If the problem continues, replace the Finisher PWB (PL 21.12). Replace the Finisher PWB (PL 21.12). If the problem continues, replace the Booklet PWB (PL 21.12). If the problem continues, replace the Finisher PWB (PL 21.12). If the problem persists, replace the Booklet PWB (PL 21.12).

• Code: 024-923
• Description: Yellow Toner Cartridge Empty The Yellow Toner Cartridge is empty. This fault requires service only if the message appears before the Toner Cartridge is depleted.
• Remedy: • Ensure that there is toner and the toner is evenly distributed in the Yellow Cartridge. • Check the Yellow ATC Sensor for blockage or contaminants. • Check the drive system from the Developer Drive Motor to the Yellow Developer Housing for damage.
  Replace the Yellow Toner Cartridge (PL 6.1). If the problem continues, go to RAP 009-410, Yellow Toner Cartridge Near Empty.