Description: Optional paper tray unit error The paper tray unit selfdiagnostics detect an error and notify the main control board. Detection timing: Just after power is turned on or when the paper tray unit is running.
Causes: Defective paper tray unit control board
Remedy: Defective paper tray unit control board: Replace.
Code: SC790
Description: Projector lamp on error - Timing & Condition - The projector lamp does not turn on 100 ms after 5V is applied to it.
Causes: • Poor connection of connector • Blown projector lamp • Defective projector main board
Remedy: 1. Check if the connector is properly connected. 2. Replace the projector lamp if it is blown. 3. Replace the projector main board.
Code: SC791
Description: Projector lamp off error - Timing & Condition - The projector lamp does not turn off 100 ms after it is turned off.
Causes: • Defective projector main board • Defective scanner IPU board • Defective main control board
Remedy: Replace the projector main board. Replace the scanner IPU board. Replace the main control board.
Code: SC792
Description: Projector lamp overheated - Timing & Condition - The projector lamp overheats during projector operation.
Causes: • Poor connection of connector • Defective thermistor • Defective projector main board
Remedy: 1. Check if the connector of the fan is properly connected. 2. Replace the fan if it is defective. 3. Replace the thermistor if it is defective. 4. Replace projector main board.