Brother International HL-2600CN Service Manual - Page 325

Error Code Concerned Part H2,H3,H4 Fusing Unit and Others Confirm that a fusing heater is lit. NO Is the fusing heater controlled for On/Off. YES Is the line voltage to be the default value ? NO YES Is the rating of fusing heater correct ? NO Confirm the input voltage. Confirm the rating and replace the fusing heater. Are H2,H3 and H4 errors cleared ? YES Confirm the wiring and connector of the heater. Is the connector HP/HN connected ? YES Is the fuser unit properly installed ? YES Is the fuser connector damaged ? NO Connect them properly. NO Install it properly. YES Replace the connector. NO NO YES Is there any contract failure of the lamp holder ? 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 PWB 2. Job is complete.