Lexmark 4049LMO Service Manual - Page 41

4049-XXX conductor drum. Check the condition of each HVPS contact and make sure they spring back when pressed. Check the continuity of the HVPS cable. Make sure the following voltages are correct; if they are not, replace the engine board. Connector J13-5 to J13-4 J13-6 to J13-4 Voltage +24 VDC +24 VDC Run the Print Test with the RIP Board removed. Make the following voltage checks while printing and again while idling. If the voltages are not correct, replace the engine board. Connector J13-1 to J13-4 J13-2 to J13-4 Voltage while Printing +4.5 VDC +4 VDC Voltage while Idling 0 VDC 0 VDC If no other trouble is found replace the HVPS. Blank Page Inspect the printhead shutter for proper operation and make sure the actuator on top of the cartridge is present and extends into the printhead shroud when the printer top cover is closed. A failed printhead will cause a 931 Service error rather than blank output. Check the continuity of the HVPS cable. The HVPS and transfer roll contacts should be clean and spring back when pressed. Make sure the transfer roll contact under the left bearing is making contact with the HVPS. Diagnostic Information 2-14