• Code: E600
• Description: Cyan TCR Sensor adjustment failure
  - TCR Sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
• Causes: • Photoconductor Unit /C • Photoconductor Unit /M • Photoconductor Unit /Y • Toner Supply Motor Y/M (M6) • Toner Supply Motor C/K (M7) • Mechanical Control Board (PWB-M) • Controller Board (PWB-P)
• Remedy: 1 Clean the TCR Sensor window on the underside of the Photoconductor Unit if dirty - - 2 M6, M7 operation check PWB-M CNDM2-10 to 13 (M6) PWB-M CNDM3-10 to 13 (M7) C-22 C-23 3 Reinstall Photoconductor Unit - - 4 Change Photoconductor Unit - - 5 Change PWB-M - - 6 Change PWB-P

• Code: E601
• Description: Magenta TCR Sensor adjustment failure
  - TCR Sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
• Causes: • Photoconductor Unit /C • Photoconductor Unit /M • Photoconductor Unit /Y • Toner Supply Motor Y/M (M6) • Toner Supply Motor C/K (M7) • Mechanical Control Board (PWB-M) • Controller Board (PWB-P)
• Remedy: 1 Clean the TCR Sensor window on the underside of the Photoconductor Unit if dirty - - 2 M6, M7 operation check PWB-M CNDM2-10 to 13 (M6) PWB-M CNDM3-10 to 13 (M7) C-22 C-23 3 Reinstall Photoconductor Unit - - 4 Change Photoconductor Unit - - 5 Change PWB-M - - 6 Change PWB-P

• Code: E602
• Description: Yellow TCR Sensor adjustment failure
  - TCR Sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
• Causes: • Photoconductor Unit /C • Photoconductor Unit /M • Photoconductor Unit /Y • Toner Supply Motor Y/M (M6) • Toner Supply Motor C/K (M7) • Mechanical Control Board (PWB-M) • Controller Board (PWB-P)
• Remedy: 1 Clean the TCR Sensor window on the underside of the Photoconductor Unit if dirty - - 2 M6, M7 operation check PWB-M CNDM2-10 to 13 (M6) PWB-M CNDM3-10 to 13 (M7) C-22 C-23 3 Reinstall Photoconductor Unit - - 4 Change Photoconductor Unit - - 5 Change PWB-M - - 6 Change PWB-P

• Code: E603
• Description: Black TCR Sensor adjustment failure
  - TCR Sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
• Causes: • Photoconductor Unit /K • Toner Supply Motor C/K (M7) • Mechanical Control Board (PWB-M) • Controller Board (PWB-P)
• Remedy: 1 Clean or correct each contact of the Photoconductor Unit if faulty. - - 2 M7 operation check PWB-M CNDM3-10 to 13 C-23 3 Reinstall Photoconductor Unit /K - - 4 Change Photoconductor Unit /K - - 5 Change PWB-M - - 6 Change PWB-P

• Code: E610
• Description: 1st Image Transfer ATVC (color) failure
  - An abnormal average value is detected while performing the first image transfer ATVC of color.
• Causes: • Transfer Belt Unit • Transfer Roller • High Voltage Unit
• Remedy: 1 Check if the Transfer Roller and Transfer Belt are dirty and correct as necessary. - - 2 Change High Voltage Unit - - 3 Change Transfer Belt Unit

• Code: E611
• Description: 1st Image Transfer ATVC (K) failure
  - An abnormal average value is detected while performing the first image transfer ATVC of black.
• Causes: • Transfer Belt Unit • High Voltage Unit
• Remedy: 1 Check if the Transfer Roller and Transfer Belt are dirty and correct as necessary. - - 2 Change High Voltage Unit - - 3 Change Transfer Belt Unit

• Code: E612
• Description: 2nd Image Transfer ATVC failure
  - An abnormal average value is detected while performing the second image transfer ATVC.
• Causes: • Transfer Belt Unit • 2nd Transfer Roller • High Voltage Unit
• Remedy: 1 Check if the Transfer Roller and Transfer Belt are dirty and correct as necessary. - - 2 Check that the 2nd Transfer Roller is properly installed and correct as necessary. - - 3 Change 2nd Transfer Roller. - - 4 Change High Voltage Unit.

• Code: E620
• Description: Color PC Drum sensor malfunction
  - The output from the Color PC Drive Main and Sub Sensors remains unchanged for a continuous period of 1,000 ms while the Color PC Drum Motor is turning stably and the Lock signal is active (LOW-0).
• Causes: • Transport Drive Assy • Mechanical Control Board (PWB-M) • Harness
• Remedy: 1 Check if the Detect Light Shield Plate has damages and is properly installed, and correct as necessary. - - 2 Check the Transport Drive Assy connector for proper connection and correct as necessary. - - 3 Check the PWB-M connector for proper connection and correct as necessary. - - 4 Change the cable that connects Transport Drive Assy and PWB-M. - - 5 Change Transport Drive Assy - - 6 Change PWB-M