Description: Color regist test pattern failure. • During pre-pattern detection, pre-pattern edge (start/ end point of effective area) is not detected within the pre-pattern search area. • During detection of regist pattern at vertical/horizontal direction, pattern edge (start/end point of effective area) is not detected within the pattern search area of each unit.
Causes: • Transfer belt unit • PH unit • IDC sensor shutter solenoid (SD2) • Front side board (FRB) • MFP board (MFPB)
Remedy: 1. Wipe clean the surface of the transfer belt with a soft cloth, if it is dirty. 2. Replace the transfer belt unit if the transfer belt is damaged. 3. SD2 operation check. 4. Replace the PH unit. 5. Replace FRB. 6. Replace MFPB.