Lexmark 4049LMO Service Manual - Page 61
Stalled (diamonds on display), Vertical Void or Streak, Diagnostic Information 2-34
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4049-XXX Stalled (diamonds on display) Check the continuity of the cable from J1 on the engine board to the operator panel. Next reseat the ROM and memory SIMMs and POR. This condition can also occur if the RIP and engine board are not seated or their connectors are damaged. If the problem is still present, replace one at a time the: 1. ROM SIMM 2. Engine board 3. RIP Board Vertical Void or Streak Do a developed image test to determine if the defect is occurring before or after the transfer process. If you see the defect on the photoconductor, check the operation of the printhead shutter and clean the printhead window with a lint-free cloth folded over a cotton swab; do not use a bare swab and do not use any cleaning fluids or water on the printhead window. Inspect the HVPS contacts. If the image on the photoconductor is good, inspect the fuser rolls and transfer roll. Make sure the left transfer roll bearing is contacting the contact from the HVPS. Make sure the HVPS contacts are clean and spring back when pressed. Diagnostic Information 2-34