• Code: 172, 173
• Display: SERVICE CALL 172:Error 173:Error
• Description: Abnormal temperature detected by fuser thermistor (hightemp or low temp.)
• Remedy: Does error reoccur? Turn power ON again. Replace fuser unit. Replace the low-voltage power supply.

• Code: 174
• Display: SERVICE CALL 174:Error
• Description: Short circuit in back up roller thermistor detected (at high temperature).
• Remedy: Does error reoccur? Yes Turn power ON again. Replace fuser unit.

• Code: 175
• Display: SERVICE CALL 175:Error
• Description: Open of back up roller thermistor detected (at low temperature).
• Remedy: Does error reoccur? Yes Turn power ON again. Replace fuser unit.

• Code: 176, 177
• Display: SERVICE CALL 176:Error 177:Error
• Description: Abnormal (high) temperature of back up roller thermistor detected.
• Remedy: Does error reoccur? Turn power ON again. Replace fuser unit. Replace the low-voltage power supply.

• Code: 181, 182
• Display: SERVICE CALL 181:Error 182:Error
• Description: Option unit I/F error. (181 = Duplex Unit, 182 = Option Tray)
• Remedy: Does error reoccur? Yes Turn power ON again. After checking connection parts of connector, replace option unit.

• Code: 190
• Display: POWER OFF/ON 190:Error
• Description: System Memory Overflow.
• Remedy: Does error reoccur? Yes Turn power ON again. Add option RAM DIMM.

• Code: 200, 201, 202
• Display: SERVICE CALL 200:Error ~ 202:Error
• Description: PU Firmware download Error.
  Error occurered while writing over the PU firmware.
• Remedy: Error occurered while writing over the PU firmware. Turn the printer OFF/ON, and retry to download the PU firmware again. (Usually, the procedure (PU firmware download) which isn’t done, so this is not occur.)

• Code: 203, 204, 207, 208, 214, F0C, FFF
• Display: POWER OFF/ON 203:Error
  204:Error 207:Error 208:Error
  214:Error F0C:Error FFF:Error
• Description: An error was detected of the CU program. (203~214 is not occure in usual operating.)
• Remedy: Reinstall the CU board. Is the error message displayed again? After turn power OFF, check connections between CU board and PU board. Then turn power ON again.