Brother International HL 1850 Service Manual - Page 200

HL-1850/1870N SERVICE MANUAL M-10 ROM error / D-RAM error / NV-RAM error Possible cause Main PCB Software bug Step 1 2 Check Is it possible to print the test page with the method of = 'INSPECTION MODE' in this Chapter? Does this problem appear when printing specific data or printing under a specific environment? Result Remedy No Replace the main PCB. Yes Inform the Brother office of the used specific data, printer condition and system environment. M-11 SXX error Possible cause Main PCB Software bug Step 1 2 Check Is it possible to print the test page with the method of = `INSPECTION MODE' in this Chapter? Does this problem appear when printing specific data or printing under a specific environment? Result Remedy No Replace the main PCB. Yes Inform the Brother office of the used specific data, printer condition and system environment. M-12 E41 error Possible cause Process unit ground wire connection Corona failure High-voltage power supply PCB failure Metallic parts failure (electrostatic discharge when feeding paper) Step 1 2 3 Check Is the ground wire on the process unit secured correctly? Is the corona wire on the process unit dirty? Is the high-voltage power supply PCB fixed correctly? Result No Yes Yes Remedy Secure the ground wire correctly with the shoulder screw If the ground wire is bent, fix it to a right shape with a pair of pliers. Clean the corona wire with the wire cleaner. Reinstall the high-voltage power supply PCB correctly. 4 Are any metallic parts loose? Yes Secure the parts correctly. 6-33