Brother HL-2400C Service Manual page 272

Error Code
Concerned Part Transfer Solenoid
Check the connection of the transfer solenoid connector.
YES
Is ECN8 of IOD2 properly connected with a connector of the solenoid ?
Is ECN2 of IOD2 properly connected with DCN9 of IOD1 ?
Is DCN1 of IOD1 properly connected with 11CN of MCTL PCB ?
YES
Check the voltage(TRSLON-N/P)
Is the voltage between ECN8-4 and ECN2-8 of IOD2 a trailing edge ?
NO
Is the voltage between ECN2-3 and 12 of IOD2 a trailing edge ?
Is the voltage between ECN2-31 and 1 of IOD1 a rising edge ?
NO
Is E5 error cleared ?
YES
Finished.
E5
NO
YES
YES
YES
NO
Connect them properly.
Is E5 error cleared ?
NO
Replace the transfer solenoid.
Replace the IOD2 PCB.
Replace the IOD1 PCB.
Replace the MCTL PCB.
MCTL IOD1
11CN
DCN1 DCN9
SGND
3
1
1
TRSLON-P
8
31
31
12
YES
Finished.
IOD2
ECN2
TRSLON-N
ECN8
3
Transfer Solenoid
PGND
+24V-1
8
1
SGND TRSLON-N
TRSL
12
4