Lexmark M410 Service Manual - Page 55

4045-XXX Main Drive Service Check Service Tip: Excessive gear or main drive assembly noise is usually caused by a defective motor assembly or engine board. Service Tip: If there are equally spaced horizontal lines across the page, go to "Print Quality - Evenly spaced horizontal lines or marks" on page 2-41. WARNING: Whenever the gearbox assembly is removed from the machine it must be handled very carefully. Do not allow any of the gears to come in contact with any metal or other hard surface to avoid gear damage. It is also very important not to let any dirt, paper, staples or other material come intact with the grease in the gearbox assembly. FRU 1 Main Drive Assembly (Excessive noise or vibration) 2 Main Drive Motor Cable Action Remove the controller board and run the Main Motor Test in the Hardware Test Mode. If the noise goes away with the toner cartridge removed, inform the customer to replace the toner cartridge. Determine if the noise is in the main drive assembly, fuser, developer drive assembly or alignment assembly. Look for any loose, worn or binding parts in all assemblies. Repair as necessary. If a service error code 936 Transport Motor message displays, check the voltage at J3-6 and J3-8 on the engine board. The voltages measure approximately +5 V dc when the motor is not running and go to 0 V dc when the motor is running. If incorrect, replace the engine board. Check the continuity of the main drive motor cable. If incorrect, replace the cable. Diagnostic Information 2-29