Brother International HL-2400C Service Manual - Page 273
Check the voltage FBCLON-N/P.
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VIII-28 Error Code Concerned Part E7 Cleaner Clutch Check the connection of the cleaner clutch connector. Is ECN11 of IOD2 properly connected to the clutch ? NO Is ECN2 of IOD2 properly connected with DCN9 of IOD1 ? Is ECN1 of IOD1 properly connected with 11CN of MCTL PCB ? YES Check the voltage (FBCLON-N/P). Is the voltage between ECN11-3 and ECN2-8 of IOD2 a trailing edge? YES Is the voltage between ECN2-1 and 12 of IOD2 a rising edge ? YES Is the voltage between ECN1-35 and 1 of IOD1 a rising edge ? YES NO Is E7 error cleared ? NO YES Finished. Connect them properly. Is E7 error cleared ? NO YES Finished. Replace the cleaner clutch. Replace the IOD2 PCB. Replace the IOD1 PCB. Replace the MCTL PCB. MCTL IOD1 IOD2 11CN DCN1 DCN9 ECN2 1 SGND 1 35 FBCLON-P 35 FBCLON-P 1 PGND 8 SGND 12 ECN11 Cleaner Clutch 1 +24V-1 3 FBCLON-N FBCL