Code :

Code: 510
Description: LCT tray malfunction • LCT lift sensor does not activate within 18 seconds after the LCT lift motor turns on. • After paper end, LCT lift sensor does not activate within 4 s after 4 consecutive attempts. • After lowering, tray motor does not switch off within 5 s.
Causes: • LCT lift motor defective or disconnected. • Upper limit sensor defective or disconnected • Pick-up solenoid defective or disconnected • Paper end sensor defective

Code: 541
Description: Fusing thermistor open • The fusing temperature detected by the thermistor was below 7°C (44.6°F) for 5 seconds • 2 seconds after reaching 45°C (113°F) the temperature does not reach an additional 15oC (59°F) after checking twice.
Causes: • Fusing thermistor disconnected • Fusing thermistor connector defective • Fusing thermistor damaged or warped • Fusing temperature signal –15% less than the standard input voltage

Code: 542
Description: Fusing temperature warm-up error • Fusing temperature does not reach fusing standby temperature of 45°C (113°F) within 14 s at main power on or closing the front cover. • 20 seconds after reaching 50°C the fusing roller does not reach warm-up temperature.
Causes: • Fusing lamp defective • Poor fusing unit connector • Thermistor warped or broken • Thermostat has tripped • BICU defective • Power supply board defective

Code: 543
Description: Fusing overheat error (software detection) Fusing temperature of over 230°C (446°F) is detected for 5 s by the fusing thermistors at center or either end of the fusing roller.
Causes: • Power supply unit defective • I/O board (IOB) defective • BICU defective • Fusing thermistor defective

Code: 544
Description: Fusing overheat error (hardware circuit detection) Dual-monitor circuitry of the BICU detects an extremely high temperature of 240°C (464°F) and trips the relay circuit off.
Causes: • Power supply unit defective • I/O board (IOB) defective • BICU defective • Fusing thermistor defective

Code: 545
Description: Fusing lamp remains on After reaching warm-up temperature with main motor on, the end fusing lamp remains on at full power for 15 s, or the center fusing lamp remains on at full power for 10s
Causes: • Thermistor out of position.

Code: 546
Description: Fusing ready temperature unstable After reaching warm-up temperature, temperature fluctuations of 50°C (122°F) within 1 s occur 2 times or more.
Causes: • Thermistor connection loose • Fusing unit connector loose

Code: 547
Description: Zero cross signal malfunction The applied power supply ac frequency detection is over 66 Hz or below 45 Hz, and the zero cross signals are not detected within 500 ms after the main power on.
Causes: • Power supply board defective • Noise on the ac power line