Brother International HL-2400C Service Manual - Page 282

Error Code Concerned Part H2,H3,H4 Fusing Unit and Others Confirm that the fusing heater is lit. NO Is the fusing heater switching on and off. YES Is the line voltage thecorrect value ? NO Confirm the input voltage. YES Is the rating of fusing heater correct ? NO Confirm the rating and replace the fusing heater. Are H2,H3 and H4 errors cleared ? YES NO Confirm the wiring and connector of the heater. Are the connector HP/HN connected ? NO YES Is the fuser unit properly installed ? NO YES Is the fuser connector damaged ? YES NO Is there any contact failure of the lamp holder ? YES Connect them properly. Install it properly. Replace the connector. Replace the lamp and lamp holder. Replace the fusing unit. NO YES Is the heater wiring cut or damaged ? Replace the heater. Are H2,H3 and H4 errors cleared ? YES YES NO NO Are H2,H3 and H4 errors cleared ? NO Replace the power supply unit (LVPS). YES Are H2,H3 and H4 errors cleared ? NO Replace the MCTL PCB. VIII-37 Finished.