Brother HL-3450CN Service Manual page 297

CHAPTER 8 TROUBLESHOOTING
Error Code
Concerned Part
Confirm the connection of a cleaner clutch connector.
Is ECN11 of IOD2 properly connected with a connector of the clutch ?
Is ECN2 of IOD2 properly connected with DCN10 of IOD1 ?
Is ECN1 of IOD1 properly connected with 11CN of MCTL PWB ?
Check the voltage (FBCLON-N/P)
Is a single voltage between ECN11-3 and ECN2-5 of IOD2 to be a trailing edge?
Is a single voltage between ECN2-5 and 16 of ECN1 to be a rising edge ?
Is E7 error cleared ?
Job is complete.
E7
Cleaner Clutch
YES
YES
YES
NO
YES
NO
Connect them properly.
Is E7 error cleared ?
NO
Replace the cleaner clutch.
Replace the IOD2 PWB.
NO
Replace the MCTL PWB.
8-34
YES
Job is complete.
MCTL IOD2
11CN ECN1
14
ECN11
21
FBCLON-P
+24V-1
16 16
1
FBCLON-N
3
ECN2
+24V-1
1
PGND
5
Cleaner Clutch
FBCL