Brother International HL-3400CN Service Manual - Page 298
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UPC - 012502526223
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CHAPTER 8 TROUBLESHOOTING Error Code HO (wire cut/ short error of thermistor) Concerned Part Fusing Unit Confirm the connection of a fusing unit connector. • Is the fusing unit properly installed ? ) NO pp Is there any contact failure due to damaged connector of fusing unit YES 0 Are the connectors properly connected between the fusing unit and BCN2 of the high voltage unit (HVU) ? NO p Re-install the fusing unit. Replace the charger unit or belt cartridge. Connect them properly. 11/1 Replace the fusing unit. Is HO error cleared ? I VES NO Is HO error cleared ? > YES NO VP t Replace the IOD1 or MCTL PCB. Job is complete. Job is complete. Fuser Connector MCTL 1OD1 HVU 11CN 0 30 28 TH1 TH2 DCN1 DCN14 30 28 16 18 0 TH1 TH2 BCN1 BCN2 16 18 12 TH1 TH2 3 4 Fusing Unit 8-40