Lexmark X500n Service Manual - Page 79
Scanner / Copy / Fax service checks, Black copy service check, Flatbed service check
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7100-XXX Scanner / Copy / Fax service checks Black page copy service check Step 1 2 3 Questions / actions Yes Print a menu page, or a page from the host. Is the page black? Is the CCD ribbon cable properly connected to J-CCD on the system board? See "High voltage power supply (HVPS) service check" on page 2-23 Go to step 3. Check for +3.3VDC on pins 12 and 16 on connector J-CCD. Pins 10 and 20 are +5VDC. Pin 8 is +12VDC. Are the voltages present? Replace the flatbed unit. See "Flatbed assembly removal" on page 4-49. No Go to step 2. Properly connect the ribbon cable to J-CCD. Replace the system board. See "System board removal" on page 4-36. Flatbed service check Step 1 2 3 Questions / actions Yes Check to see if the flatbed is locked. Is it locked? Ensure that the flatbed motor cable (JFB1) is connected. Is the cable connected? Check pin 1 in J-FB1 for voltage. The voltage is only present when a copy job is running. The voltage should measure 5V. Is voltage present? Unlock the flatbed. Go to step 3. Replace the flatbed unit. See "Flatbed assembly removal" on page 4-49. ADF streak service check No Go to step 2. Properly connect the cable. Replace the system board. See "System board removal" on page 4-36. Step 1 Questions / actions Do streaks appear on the middle of scans when using the ADF? Yes No Clean the ADF glass on the flatbed using a lint-free cloth. Also, clean the separator roll and pad with a damp cloth. No issue to fix. Diagnostic information 2-41