Description: FGATE1 error - Timing & Condition - The main control board does not receive FGATE signal from the LD control board while the image transfer belt makes 3 revolution after the Start key is pressed or at certain timing during copy cycle. - FAGTE signal - This signal is generated at the LD control board certain timing after the LD control board receives the belt mark signal from the main control board in order to control the timing of the laser writing for color synchronization.
Causes: • Belt mark detection error • Electrical noise • Poor connection of connectors • Defective LD control board • Defective Main control board
Remedy: 1. Clean the belt mark located back side of the image transfer belt or replace the belt if the belt mark is dirty or peel off. 2. Clean the belt mark detection sensor if it is dirty. 3. Clean the bias terminals of development units if they are dirty. 4. Check if the harness connectors (CN605 & NC406) on the LD control board and main scanner IPU board are properly connected. 5. Check if the harness connectors (CN604 & CN306) on the LD control board and main control board are properly connected. 6. Replace the LD control board. 7. Replace the main control board. [ Signal Check ] • FGATE: CN604-A2 or TP22 on LD control board / CN306-A9 on main control board • Belt mark: CN220-A12, TP106, or CN212-B11 on I/O control board / CN303-B1, TP108, or CN306-B2 on main control board / CN604-B9 or TP31 on LD control board If the machine is equipped with the controller, 1. Check if the connectors (CN606 & CN101) on the LD control board and controller I/F board are properly set. 2. Check if the controller I/F board is properly connected. 3. Replace the interface board.
Code: SC327
Description: FGATE2 error - Timing & Condition - In the double image mode, the main control board does not receive the 2nd FGATE signal from the LD control board while the image transfer belt makes 3 revolution after the Start key is pressed or at certain timing during copy cycle.
Causes: • Belt mark detection error • Electrical noise • Poor connection of connectors • Defective LD control board • Defective Main control board
Remedy: 1. Clean the belt mark located back side of the image transfer belt or replace the belt if the belt mark is dirty or peel off. 2. Clean the belt mark detection sensor if it is dirty. 3. Clean the bias terminals of development units if they are dirty. 4. Check if the harness connectors (CN605 & NC406) on the LD control board and main scanner IPU board are properly connected. 5. Check if the harness connectors (CN604 & CN306) on the LD control board and main control board are properly connected. 6. Replace the LD control board. 7. Replace the main control board. [ Signal Check ] • FGATE: CN604-A2 or TP22 on LD control board / CN306-A9 on main control board • Belt mark: CN220-A12, TP106, or CN212-B11 on I/O control board / CN303-B1, TP108, or CN306-B2 on main control board / CN604-B9 or TP31 on LD control board If the machine is equipped with the controller, 1. Check if the connectors (CN606 & CN101) on the LD control board and controller I/F board are properly set. 2. Check if the controller I/F board is properly connected. 3. Replace the interface board.
Code: SC350
Description: TD sensor communication error - Timing - When the main switch is turned on, during printing process, or process control self-check - Condition - The main control board cannot communicate with TD sensors
Causes: • Poor connection of connectors • Defective TD sensor interface board 1 and/or 2 • Defective I/O control board • Defective main control board
Remedy: 1. Check if the connectors on the TD sensor interface board 1 (copier) and the main control board (CN353) are properly connected. 2. Check if 5V and 38V are provided to the TD sensor interface board 1 from I/O control board (CN218). 3. Check if the harnesses are damaged. 4. Check if TD sensor interface board 1 and 2 are properly installed. 5. Replace TD sensor interface board 1, 2, main control board, and/or I/O control board.
Code: SC351
Description: TD Sensor Failure - Timing - During printing process or process control self-check - Condition - The main control board does not receive the TD sensor output or receive wrong data 4 times continuously.
Causes: • Poor connection of connector • Defective TD sensor • Defective TD sensor interface board 2 • Defective main control board
Remedy: 1. Check if the connectors on the TD sensor interface board 2 (revolver) and TD sensor are properly connected. 2. Check if the harnesses is damaged. 3. Replace TD sensor. 4. Replace the TD sensor interface board 2. 5. Replace the main control board.
Code: SC360
Description: Development bias error - Timing - When the development DC bias turns ON during printing process or process control - Condition - The feedback voltage is 4.8V or higher, or PWM value becomes 80% or higher for 500 ms continuously.
Causes: • Poor connection of connectors • Dirty terminals • Defective high voltage supply (C/G/B) • Defective I/O control board • Defective main control board
Remedy: 1. Clean the development roller shaft (terminal) if it. 2. Clean the bias terminal if it is dirty. 3. Replace the bias terminal if it does not move smoothly. 4. Check the connectors of high voltage supply cable and trigger lines are properly connected on the high voltage supply board (C/G/B), I/O control board, and main control board. 5. Replace the high voltage supply board (C/G/B) 6. Replace the I/O control board. 7. Replace the main control board. [ Signal Check ] • Feedback signal: CN217-2, TP171, or CN211-A5 on I/O control board / CN302-A5 or TP111 on main control board • PWM: CN217-3 or TP141 on I/O control board
Code: SC361
Description: Revolver HP sensor error - Timing & Condition - The home position is not detected during 3 revolution of the revolver unit after the revolver motor turns on.
Causes: • Poor connection of connector • Dirty sensor • Defective sensor • Defective revolver motor • Defective revolver drive board • Defective I/O control board • Defective main control board
Remedy: 1. Check if the connector of sensor is properly connected. 2. Replace the revolver H.P. sensor if the voltage at CN216-B5 on the I/O control board does not change when covering the sensor with a piece of paper. NOTE: Make sure that the revolver unit is locked in this step. 3. If the revolver unit does not rotate; 1 Replace the revolver motor. 2 Replace revolver motor drive board. 3 Replace the I/O control board. 4 Replace the main control board. [ Signal Check ] • Revolver H.P.: CN216-B5 or TP107 on I/O control board