Description: Serial Number Mismatch Serial number stored in the memory does not have the correct code.
Causes: • NVRAM defective • BCU replaced without original NVRAM
Remedy: 1. Reinstall the original NVRAM in the replaced BCU. 2. Turn off and on the main power switch of the copier if a new NVRAM is installed in the BCU.
Code: 202
Description: Polygon motor error 1: ON timeout The polygon mirror motor does not reach the targeted operating speed within the specified time after turning on or changing speed
Causes: • Defective or disconnected harness to polygon motor driver board • Defective polygon motor driver board • Defective polygon motor.
Remedy: 1. Replace the laser unit. 2. Replace the harness. 3. Replace the controller. 4. Replace the BCU.
Code: 203
Description: Polygon motor error 2: OFF timeout The polygon mirror motor does leave the READY status within 3 seconds after the polygon motor switches off.
Causes: • Disconnected or defective harness to polygon motor driver board • Defective polygon motor driver board • Defective polygon motor
Remedy: 1. Check or replace the harness. 2. Replace the laser unit. 3. Replace the controller. 4. Replace the BCU.
Code: 204
Description: Polygon motor error 3: XSCRDY signal error The polygon ready (SCRDY_N) signal goes HIGH (inactive) while the laser diode is firing.
Causes: • Disconnected or defective harness to polygon motor driver board • Defective polygon motor • Defective polygon motor driver board
Remedy: 1. Check or replace the harness. 2. Replace the laser unit. 3. Replace the controller. 4. Replace the BCU.
Code: 220-001
Description: The laser synchronizing detection signal for the start position of the LDB [K], [Y], is not output for two seconds after laser unit turns on while the polygon motor is rotating normally.
Causes: • Disconnected cable from the laser synchronizing detection unit or defective connection • Defective laser synchronizing detector • Defective LDB • Defective BCU
Remedy: 1. Check the connectors. 2. Replace the laser unit. 3. Replace the controller. 4. Replace the BCU.
Code: 222-004
Description: The laser synchronizing detection signal for the start position of the LDB [K], [Y], is not output for two seconds after laser unit turns on while the polygon motor is rotating normally.
Causes: • Disconnected cable from the laser synchronizing detection unit or defective connection • Defective laser synchronizing detector • Defective LDB • Defective BCU
Remedy: 1. Check the connectors. 2. Replace the laser unit. 3. Replace the controller. 4. Replace the BCU.