Lexmark X644E Service Manual - Page 154

7002-xxx 843.xx Error code service check Service Scanner-flatbed mechanical failure Other symptoms may include a loud noise from between the flatbed and the printer unit, or a blue screen on the display. Note: Check for correct installation of the home sensor cable before proceeding with this service check. FRU 1 Flatbed scanner CCD drive shafts 2 Flatbed CCD module assembly ribbon cable 3 Flatbed CCD module assembly 4 Flatbed CCD scan motor/ cable Flatbed interface card 5 Flatbed home sensor cable Flatbed home sensor Flatbed interface card Action Check to make sure that both of the CCD drive shafts are correctly installed. If correct, go to step 2. Check to make sure that the flatbed CCD module assembly is connected correctly to both the CCD module and J2 on the scanner control card. If correct, go to step 3. Check the flatbed CCD assembly for any signs of damage and for proper mechanical operation. If any problems are found, replace the flatbed CCD assembly. If the flatbed CCD assembly is replaced, it is necessary to perform scanner registration. See "Scanner registration" on page 4-4. Check for correct installation of the CCD scan motor cable to both the motor and to the flatbed interface card at CN2. Enter the Diagnostics Menu (turn on MFP while holding 3 and 6), select SCANNER TESTS, and select Feed Tests.If the motor does not turn during the scanner Feed Test, check for any signs of binds or mechanical problems. Repair as necessary. If no problem is found, go to step 5. Check to make sure that the home sensor cable is correctly installed to both the home sensor and to CN4 on the flatbed interface card. Check for correct operation of the home sensor. If it does not operate correctly, replace the FRUs in the following order: • Flatbed interface card. See "Flatbed interconnect card removal" on page 4-33. • Flatbed home sensor. See "Home sensor removal" on page 4-46. If the problem persists, go to step 6. 2-116 Service Manual