Brother HL-3450CN Service Manual page 295

CHAPTER 8 TROUBLESHOOTING
Error Code
Concerned Part Transfer Cam Clutch (TRCM)
Confirm the connection of a transfer solenoid connector.
Is ECN8 of IOD2 properly connected with a connector of the solenoid ?
Is ECN1 of IOD2 properly connected with 12CN of MCTL PWB ?
Check the voltage(TRSLON-N/P)
Is a single voltage between ECN8-4 and ECN2-5 of IOD2 to be a trailing edge ?
Is a single voltage between 5 of ECN2 and 18 of IOD2 to be a rising edge ?
Is E5 error cleared ?
Job is complete.
E5
YES
NO
YES
YES
NO
YES
NO
NO
YES
Connect them properly.
Is E5 error cleared ?
NO
Replace the transfer solenoid.
Replace the IOD2 PWB.
Replace the MCTL PWB.
MCTL
12CN
8-32
YES
Job is complete.
IOD2
ECN1
14
ECN8
26
Transfer Cam Clutch
TRSLON-P
18 +24V-1
18
1
TRSLON-N
TRCM
4
ECN2
+24V-1
1
PGND
5