Causes: A bias leak has occurred for the drum charge, development charge, or transfer charge. PWM signals are sampled at 20 msec. intervals. This SC is issued if 10 PWM samplings within 200 msec. are abnormal. • HVPS harness loose, broken, defective • HVPS board defective • AIO terminal defective
Remedy: • Cycle the machine off/on • Check all the harness connections of the HVPS • Check spring-loaded AIO terminal installation behind the HVPS. • Replace HVPS.
Code: SC500
Description: Main Motor Error (C6)
Causes: One of the following problems occurred: • The machine failed to detect a LOCK signal within two sec. after the main motor was turned on. • The machine failed to detect a LOCK release signal with 2 sec. after the main motor was turned off.
Remedy: • Cycle the machine off/on • Check the areas around motor and main drive train for a physical obstruction (paper scraps, etc.). • Clean the main motor drive train. • Replace the Main motor
Code: SC541
Description: Fusing Unit Thermistor Error (Fatal Error) (C7)
Causes: No temperature was detected within 5 sec. after the machine was turned on (temperature was less than 0°C).
Remedy: • Check the Fusing unit thermistor if it’s disconnected, broken or not set correctly • Check the Fusing lamp if it’s disconnected, broken or not set correctly • Replace Fusing unit
Code: SC542
Description: Fusing Reload Temperature Error (Fatal Error) (C8)
Causes: After starting up or during operation the machine detected after 5 readings at 1.5 sec. intervals that the hot roller was 5°C below the reload (operating) temperature. • Unstable input voltage • Fusing thermistor deformed or out of position • Fusing lamp harness loose, broken, defective • Fusing lamp defective • Fusing unit defective
Remedy: • Use high quality power source • Check the Fusing thermistor position and it’s harness connection • Check the Fusing lamp and it’s harness connection • Replace Fusing unit
Code: SC543
Description: High Temperature Error - Software (Fatal Error) (C9)
Causes: The temperature inside the fusing unit exceeded 225°C (437°F) for more than 1 sec. • After this error has occurred three times, the machine will shut down and must be released with the Smart Organizing Monitor and serviced by a service technician. • Main board defective • PSU defective (TRIAC short)
Remedy: • Check all PCB harness connection • Check or replace PSU • Replace Main board
Code: SC544
Description: High Temperature Error- Hardware (Fatal Error) (c1)
Causes: The machine detected the CPU port LOW twice at 100 ms intervals and issued this SC. This check is always done to check for overheating, even if SC543 does not detect the problem.
Remedy: • Check or replace Fusing unit • Check or replace PSU • Replace Main board