Brother HL-2400C Service Manual page 274

Error Code
Cleaner Clutch
Concerned Part
Check the connection of the cleaner clutch connector.
Is ECN11 of IOD2 properly connected to the clutch ?
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?
Is the voltage between ECN2-1 and 12 of IOD2 a rising edge ?
Is the voltage between ECN1-35 and 1 of IOD1 a rising edge ?
NO
Is E7 error cleared ?
YES
Finished.
E7
NO
YES
YES
YES
NO
Connect them properly.
Is E7 error cleared ?
NO
Replace the cleaner clutch.
Replace the IOD2 PCB.
Replace the IOD1 PCB.
Replace the MCTL PCB.
IOD1
MCTL
11CN DCN1 DCN9
SGND
1
1
FBCLON-P
35
35
YES
Finished.
IOD2
ECN2
FBCLON-P ECN11
1
Cleaner Clutch
PGND
+24V-1
8
1
SGND FBCLON-N FBCL
12
3