Description: Charge current leak - Timing - When the main charge is ON in the printing process or process control mode - Condition - The current leak is detected for 2 seconds.
Causes: • Charge corona unit not installed properly • Poor connection of harnesses • Defective high voltage supply board (C/G/B) • Defective I/O control board • Defective main control board.
Remedy: 1. Reinstall the charge corona unit properly or replace the charge corona unit. 2. Reconnect the connectors on the high voltage supply board (C/G/B), I/O control board, and main control board, or check the harnesses. 3. Check and clean the charge corona unit receptacle. 4. Replace the high voltage supply board (C/G/B). 5. Replace the I/O control board. 6. Replace the main control board. [ Signal Check ] • Leak detection: CN217-7 or TP120 on I/O control board
Code: SC302
Description: Charge corona grid voltage error - Timing - When the main charge grid is ON in the printing process or process control mode - Condition - The feedback voltage is 4.8V or higher, or PMW value is 50% or higher for 500msec continuously.
Causes: • Charge corona unit not installed properly • Poor connection of harnesses • Defective high voltage supply board (C/G/B) • Defective I/O control board • Defective main control board.
Remedy: 1. Reinstall the charge corona unit properly or replace the charge corona unit. 2. Reconnect the connectors on the high voltage supply board (C/G/B), I/O control board, and main control board, or check the harnesses. 3. Check and clean the charge corona unit receptacle. 4. Replace the high voltage supply board (C/G/B). 5. Replace the I/O control board. 6. Replace the main control board. [ Signal Check ] • Leak detection: CN217-7 or TP120 on I/O control board [ Signal Check ] • Feedback signal: CN217-5, TP173, or CN211-A6 on I/O control board or CN302-A4 or TP107 on main control board • PWM: CN217-6 or TP140 on I/O control board
Code: SC303
Description: Charge cleaner motor error - Timing - When the charge cleaner starts - Condition - • Over-current is detected for 10 seconds when the cleaner pads start moving from rear to front. • Over-current is still not detected 1 minute after the cleaner motor turns on.
Causes: • Poor connection of connector • Defective cleaner motor • Cleaner pad locked • Defective I/O control board • Defective main control board
Remedy: 1. Check if the connectors (CN861 & CN829) are firmly connected. 2. Check if the charge corona unit is properly set. 3. Clean the screw shaft if it is dirty. 4. Check if the cleaner pad is mechanically locked. 5. Check if the connector is firmly connected on the I/O control board (CN219). 6. Replace the I/O control board. 7. Replace the main control board.
Code: SC320
Description: Polygon motor error - Condition - • The polygon motor rotation speed stays out of the range 22 seconds after the main switch is turned on. • The polygon motor rotation speed becomes out of the range while the main switch is ON. (Polygon motor keeps rotating with constant speed while the main switch is ON.)
Causes: • Poor connection of connector • Defective polygon motor • Defective LD control board • Defective main scanner IPU board
Remedy: 1. Check the connector (CN602-5) on the LD control board is properly connected. 2. Check the continuity of harness. 3. Replace the polygon motor. 4. Replace the LD control board. 5. Replace the main scanner IPU board. [ Signal Check ] • Motor OK: CN602-2 on LD control board.
Code: SC322
Description: Laser synchronizing signal error - Timing & Condition - While the polygon motor keeps running and LD is ON, the LD control board does not receive the laser synchronizing signal.
Causes: • Poor connection of connectors • Defective laser synchronizing detector board • Improper laser beam axis • Defective LD control board • Defective main control board • Defective optic housing unit
Remedy: 1. Check if the connectors (CN3 & CN 602) are properly connected on the laser synchronizing detector board and LD control board 2. Remove and clean the synchronizing detector board. 3. Check if anything such as seal of the Barrel Toroidal lens in the optic housing unit interferes the laser axis. 4. Replace the synchronizing detector board. 5. Check if the harness connectors (CN1 & CN603) on the LD unit and LD control board are properly connected or check the continuity of the harness. 6. Check if the harness connectors (CN604 & CN306) on the LD control board and main control board are properly connected or check the continuity of the harness. 7. Replace the LD control board. 8. Replace the main control board 9. Check the optical housing unit or replace it.
Code: SC323
Description: LD error - Timing - During LD writing - Condition - LD control boards detects the over-current or no feedback signal from LD unit.
Causes: • Poor connection of connector • Defective LD unit • Defective LD control board • Defective main control board
Remedy: 1. Check if the connectors (CN1 & CN603) on the LD unit and LD control board are properly connected. 2. Check the continuity of the harness. 3. Check the harness connectors (CN604 & CN306)on the LD control board and main control board are properly connected. 4. Replace the LD unit. 5. Replace the LD control board 6. Replace the main control board.