Brother International HL 1240 Service Manual - Page 132

CHAPTER 6 TROUBLESHOOTING 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 Subsection 9.1 'Test Print 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 Service A (Address error) / Service B (BUS error) / CPU runtime error Possible cause Main PCB Software bug Step 1 2 Check Is it possible to print the test page with the method of Subsection 9.1 'Test Print 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 Engine interface error Possible cause Harness connection failure Engine PCB Main PCB Step 1 2 3 Check Is the connection between connector P6 on the main PCB and connector P3 on the engine PCB secure? Is the problem solved by replacing the engine PCB? Is the problem solved by replacing the main PCB? Result No Remedy Reconnect the connectors securely. Yes Replace the engine PCB. Yes Replace the main PCB. 6-22