Causes: The polygon mirror motor does not reach the targeted operating speed within 10 sec. after turning.
Remedy: • Polygon motor/driver board harness loose or disconnected • Polygon motor/driver board defective • Laser optics unit defective 1. Turn the machine main power off/on. 2. Replace the interface harness of the laser optics unit. 3. Replace the laser optics unit.
Code: 203
Description: Polygon motor off timeout error
Causes: The polygon mirror motor does not leave the READY status within 20 sec. after the polygon mirror motor switched off.
Remedy: • Polygon motor/driver board harness loose or disconnected • Polygon motor/driver board defective • Laser optics unit defective 1. Turn the machine main power off/on. 2. Replace the interface harness of the laser optics unit. 3. Replace the laser optics unit.
Code: 204
Description: Polygon motor lock signal error
Causes: The signal remains HIGH for 200 ms (or 4times in 50msec polling) while the polygon mirror motor is rotating.
Remedy: • Polygon motor/driver board harness loose or disconnected • Polygon motor/driver board defective • Laser optics unit defective 1. Turn the machine main power off/on. 2. Replace the interface harness of the laser optics unit. 3. Replace the laser optics unit.
Code: 220
Description: Beam Synchronize error
Causes: The laser synchronizing detection signal for LD is not output within 400msec after the LD unit has turned on.
Remedy: • Disconnected cable from the laser synchronizing detection unit or defective connection • Defective laser synchronizing detector • Defective LD • Defective Main board 1. Check the connectors. 2. Replace the laser optics unit. 3. Replace the Main board.
Code: 268
Description: Laser Scanning Unit thermistor error
Causes: At power on, the temperature sensor in the optics unit detected a temperature lower than -30°C for more than 4 sec. -or- It detected a temperature higher than 105°C for more than 1sec.
Remedy: • Thermistor disconnected (causes extremely low temperature reading) • Thermistor damaged and short circuited (causes extremely high temperature reading) 1. Turn the machine's main power off, and then on. 2. Replace the thermistor.
Code: 491
Description: Bias leak
Causes: An error signal is detected for 0.2 seconds when changing the development unit.
Remedy: • Defective transfer roller • Defective HVP pack 1. Turn the machine's main power off, and then on.