Brother HL-3450CN Service Manual page 296

Error Code
Cleaning Brush Solenoid (FBCM)
Concerned Part
Confirm the connection of a cleaning brush solenoid connector.
YES
Is ECN10 of IOD2 properly connected with a connector of the solenoid ?
Is ECN1 of IOD2 properly connected with 11CN of MCTL PWB ?
YES
Check the voltage (FBSLON-N/P)
Is a single voltage between ECN10-4 and ECN2-5 of IOD2 to be a trailing edge ?
Is a single voltage between ECN1-17 and ECN2-5 of IOD2 to be a rising edge ?
NO
Is E6 error cleared ?
YES
Job is complete.
E6
NO
NO
YES
YES
NO
Connect them properly.
Is E6 error cleared ?
Replace the transfer solenoid.
Replace the IOD2 PWB.
Replace the MCTL PWB.
MCTL
11CN
8-33
HL-3450CN SERVICE MANUAL
YES
Job is complete.
IOD2
ECN1
14
Drum Cleaner
ECN10
25
Solenoid
FBSLON-P
17 17 +24V-1
1
FBCM
FBSLON-N
4
ECN2
+24V-1
1
PGND
5