KIP C7800

• Code: U-1100
• Description: Bypass Feeder Open
• Causes:
• Remedy: Open / unlock 1 Is the Bypass Feeder opened or unlocked? Yes Close it firmly.
  Harness 2 Is the wiring OK between Bypass Feeder and Fuser Drive PCB (PW12556)?
  Fuser Drive PCB (PW12556) 3 Can the problem be fixed by replacing the Fuser Drive PCB? Yes OK
  Deck Terminal PCB Assy (PW12558) 4 Is the wiring 3 flat cables OK between Roll Deck and Deck Terminal OCB Assy (PW12558)? No Reconnect the flat cables, or replace them.
  Main Control PCB (PW12520) 5 Can the problem be fixed by replacing the Main Control PCB? Yes OK

• Code: U-1101
• Description: Left Side Door Open
• Causes:
• Remedy: Open / unlock 1 Is the Left Side Door opened or unlocked? Yes Close it firmly.
  Harness 2 Is the wiring OK between Left Side Door Switch (DS2) and Fuser Drive PCB (PW12556)? No Correct it
  Left Side Door Switch (DS2) 3 Run Service Software “input check” to monitor the status of Left Side Door Switch. 0412: DS2 Is the status “1” even Left Side Door is closed? Yes Reseat the microswitch, or replace it.
  Fuser Drive PCB (PW12556) 4 Can the problem be fixed by replacing the Fuser Drive PCB? Yes OK
  Main Control PCB (PW12520) 5 Can the problem be fixed by replacing the Main Control PCB? Yes OK

• Code: U-1103
• Description: Rear Door Open
• Causes:
• Remedy: Open / unlock 1 Is the Rear Door opened or unlocked? Yes Close it firmly.
  Harness 2 Is the wiring OK between the followings? Rear Door Switch (DS6) Belt Unit Switch (MS4, MS5) Fuser Drive PCB (PW12556) No Correct it
  Rear Door Switch (DS6) Belt Unit Switch (MS4, MS5) 3 Run Service Software “input check” to monitor the status of the switches. 0411:Rear Door Switch (DS6) 0413: Belt Unit Switch (MS4, MS5) Is the status “1” even Rear Door is closed? Yes Reseat the microswitch, or replace it.
  Fuser Drive PCB (PW12556) 4 Can the problem be fixed by replacing the Fuser Drive PCB? Yes OK
  Main Control PCB (PW12520) 5 Can the problem be fixed by replacing the Main Control PCB? Yes OK

• Code: U-1104
• Description: Fuser Cover (Exit Door) Open
• Causes:
• Remedy: Open / unlock 1 Is the Fuser Cover opened or unlocked? Yes Close it firmly.
  Harness 2 Is the wiring OK between Fuser Cover Switch (DS1) and Fuser Drive PCB (PW12556)? No Correct it
  Fuser Cover Switch (DS1) 3 Run Service Software “input check” to monitor the status of Fuser Cover Switch. 040F: Fuser Cover Switch (DS1) 0414: Fuser Cover Switch (DS7) Is the status “1” even Fuser Cover is closed? Yes Reseat the microswitch, or replace it.
  Fuser Drive PCB (PW12556) 4 Can the problem be fixed by replacing the Fuser Drive PCB? Yes OK
  Main Control PCB (PW12520) 5 Can the problem be fixed by replacing the Main Control PCB? Yes OK

• Code: U-1201, U-1202
• Description: Process Unit 1/2/3/4 Open
• Causes: U-1201: Process Unit 1 (K) U-1202: Process Unit 2 (C) U-1203: Process Unit 3 (M) U-1204: Process Unit 4 (Y)
• Remedy: Open / unlock 1 Is the Process Unit opened or unlocked? Yes Close it firmly.
  Toner dirt 2 Is the Developer Unit Bias Terminals dirty with toner? Yes Clean it.
  Harness 3 Is the wiring OK between Process Unit and Dev Drive PCB (PW12555A/B/C/D)? No Correct it.
  Dev Drive PCB (PW12555 A/B/C/D) 4 Can the problem be fixed by replacing the Dev Drive PCB? Yes OK
  Main Control PCB (PW12520) 5 Can the problem be fixed by replacing the Main Control PCB? Yes OK

• Code: U-1203, U-1204
• Description: Process Unit 1/2/3/4 Open
• Causes: U-1201: Process Unit 1 (K) U-1202: Process Unit 2 (C) U-1203: Process Unit 3 (M) U-1204: Process Unit 4 (Y)
• Remedy: Open / unlock 1 Is the Process Unit opened or unlocked? Yes Close it firmly.
  Toner dirt 2 Is the Developer Unit Bias Terminals dirty with toner? Yes Clean it.
  Harness 3 Is the wiring OK between Process Unit and Dev Drive PCB (PW12555A/B/C/D)? No Correct it.
  Dev Drive PCB (PW12555 A/B/C/D) 4 Can the problem be fixed by replacing the Dev Drive PCB? Yes OK
  Main Control PCB (PW12520) 5 Can the problem be fixed by replacing the Main Control PCB? Yes OK