• Code: 421 X13
• Description: Multi-tray paper feed jam (Detailed No. 6: S2) FL transfer sensor 3 failed to activate when the FL transfer motor FG sensor attained the specified pulse count after FL feed sensor 2 activated during a paper feed operation. (FL feed sensor 1 remained OFF, and FL feed sensor 2 remained activated.) Or FL feed sensor 2 remained activated at power ON or in standby mode.

• Code: 422 X12
• Description: Multi-tray paper feed jam (Detailed No. 7: S23) FL transfer sensor 4 failed to activate when the FL transfer motor FG sensor attained the specified pulse count after FL feed sensor 3 activated during a paper feed operation. (FL feed sensor 1 remained OFF, and FL feed sensors 2 and 3 remained activated.) Or FL feed sensors 2 and 3 remained activated at power ON or in standby mode.

• Code: 423 X13
• Description: Multi-tray paper feed jam (Detailed No. 8: S234) The registration sensor failed to activate when the FL transfer motor FG sensor attained the specified pulse count after FL feed sensor 4 activated during a paper feed operation. (FL feed sensor 1 remained OFF, and FL feed sensors 2 through 4 remained activated.) Or FL feed sensors 2 through 4 remained activated at power ON or in standby mode.

• Code: 424 X13
• Description: Multi-tray paper feed jam (Detailed No. 9: S234R) Feed sensors 2 through 4, and the registration sensor remained activated at power ON or in standby mode.

• Code: 425 X11
• Description: Multi-tray paper feed jam (Detailed No. 10: S3) FL transfer sensor 4 failed to activate when the FL transfer motor FG sensor attained the specified pulse count after FL feed sensor 3 activated during a paper feed operation. (FL feed sensors 1 and 2 remained OFF, and FL feed sensor 3 remained activated.) Or FL feed sensor 3 remained activated at power ON or in standby mode.

• Code: 426 X11
• Description: Multi-tray paper feed jam (Detailed No. 11: S34) The registration sensor failed to activate when the FL transfer motor FG sensor attained the specified pulse count after FL feed sensor 4 activated during a paper feed operation. (FL feed sensors 1 and 2 remained OFF, and FL feed sensors 3 and 4 remained activated.) Or FL feed sensors 3 and 4 remained activated at power ON or in standby mode.

• Code: 427 X11
• Description: Multi-tray paper feed jam (Detailed No. 12: S34R) Feed sensors 3 and 4, and the registration sensor remained activated at power ON or in standby mode.

• Code: 428 X11
• Description: Multi-tray paper feed jam (Detailed No. 13: S4) The registration sensor failed to activate when the FL transfer motor FG sensor attained the specified pulse count after FL feed sensor 4 activated during a paper feed operation. (FL feed sensors 1 through 3 remained OFF, and FL feed sensor 4 remained activated.) Or FL feed sensor 4 remained activated at power ON or in standby mode