Lexmark C782 Service Manual - Page 122

5061 POR complete, printer feeds blank page This symptom is usually associated with the upper switch mounted on the front access door support. Step Actions and questions 1 Make sure that the ITU light shield is not broken. Is the ITU light shield broken? 2 Make sure that the ITU light shield is not out of position. Is the ITU light shield out of position? 3 Make sure the ITU assembly interlock switch actuator is not damaged or broken and actuates the switch correctly. Is the actuator damaged or broken? 4 Front cover assembly Does the front cover assembly close correctly? 5 Front cover assembly Make sure the front cover flag is not broken or damaged and actuates the switches correctly. Is the flag broken or damaged? 6 HVPS/cover open interlock cable assembly to system board-Make sure that the cable is correctly connected to J14 on the system board and the ITU autoconnect is seated correctly. Is the cable connected correctly? 7 HVPS/cover open interlock cable assembly-Make sure the front cover assembly is closed and the ITU is correctly installed. Disconnect the switch cable from J14 on the system board. Check for continuity between J14-1 and J14-2 on the cable connector. Is there continuity? Yes Replace the ITU light shield. Properly align ITU light shield. Replace the ITU assembly. See "ITU assembly removal" on page 4-49. Go to step 5 Replace the front cover. See "Front cover or front cover backplate assembly removal" on page 4-11. Go to step 7 Replace the system board. See "System board removal" on page 4-89. No Go to step 2 Go to step 3 Go to step 4 Install the front cover correctly, or repair as necessary. Go to step 6 Install the cable correctly. Replace the HVPS/cover open interlock switch/cable assembly (see "Printhead interlock cable assembly" on page 7-37 for part number.) 2-80 Service Manual