• Code: SC504-2
• Description: 4th tray lift malfunction 2 (optional paper tray unit)
  If the main power switch is turned on when the paper is already at the feed height, the paper height position is detected again. At this time, the paper upper limit sensor should de-activate within 5 seconds after the paper bottom plate starts to drop. If it does not deactivate within 5 s four times consecutively, this SC will be generated.
• Causes: • 4th tray upper limit sensor defective • Tray lift motor defective • Too much paper in the trayction

• Code: SC506
• Description: Paper tray unit main motor lock (optional paper tray)
  A main motor lock signal is detected for more than 0.5 s during rotation.
• Causes: • Paper tray unit main motor defective • Too much load on the drive mechanism • Poor motor connector connection

• Code: SC507
• Description: LCT main motor lock (optional LCT)
  A main motor lock signal is detected for more than 0.5 s during rotation.
• Causes: • LCT main motor defective • Too much load on the drive mechanism • Poor motor connector connection

• Code: SC510-1
• Description: LCT tray malfunction 1
  1) The LCT lift sensor does not activate for more than 18 seconds after the LCT lift motor turned on. 2) The LCT lower limit sensor does not activate for more than 18 seconds after the LCT lift motor turned on. 3) The LCT lift sensor is already activated when the LCT lift motor turns on.
• Causes: • LCT lift motor defective • Pick-up solenoid defective • Poor motor connector connection • Poor pick-up solenoid connector connection • Paper end sensor defective • LCT lift sensor defective • LCT lower limit sensor defective

• Code: SC510-2
• Description: LCT tray malfunction-2
  1) During paper lifting, the LCT lift sensor does not activate for more than 1.5 seconds after the paper end sensor turned on. If this condition occurs four times consecutively, this SC will be generated. 2) During paper lifting, after the top of the paper reaches the upper limit position, the paper is lowered until the LCT lift sensor is de-activated. At this time, the LCT lift sensor does not de-activate for more than 5 seconds.
• Causes: • LCT lift motor defective • Pick-up solenoid defective • Poor motor connector connection • Poor pick-up solenoid connector connection • Paper end sensor defective • Too much paper in the LCT • Paper is not properly loaded in the LCT

• Code: SC541
• Description: Fusing thermistor open
  The fusing temperature detected by the thermistor was below 7°C for 16 seconds.
• Causes: • Fusing thermistor defective or out of position • Poor thermistor terminal connection

• Code: SC542
• Description: Fusing temperature warming-up error
  The fusing temperature does not reach the fusing standby temperature within 125 seconds after the main power switch is turned on.
• Causes: • Fusing thermistor defective or out of position • Fusing lamp open • Fusing thermofuse open • BICU defective • Power supply board defective • Poor fusing unit connection

• Code: SC543
• Description: Fusing overheat error 1
  A fusing temperature of over 231°C is detected for 5 seconds by the fusing thermistor.
• Causes: • Fusing thermistor defective • BICU defective • I/O board (IOB) defective