Brother HL-2400C Service Manual page 267

Error Code
Name of Part Developer Solenoid (PSL KC)
Check the Connector.
Is the connection between ECN3 of IOD2 and Solenoid (PSL KC) OK ?
Is the harness of Solenoid (PSL KC) broken ?
Check the voltage at (PSL KC) ON-N.
+24V
Does the voltage drop(
)between ECN3-13 and ECN2-8?
Does the voltage jump( )between ECN1-6 and ECN2-12 ?
Replace current MCTL PCB with a new one..
Is D6 Error cleared ?
Finished
D6
YES
YES
NO
YES
NO
NO
YES
NO
Connect the harness.
Connect the connector properly.
Is D6 Error cleared ?
NO
Replace the front cover unit with a new one
Replace IOD2 PCB with a new one.
Is D6 Error cleared ?
NO
Re-check from beginning of section.
MCTC
12CN
PSL(YM)ON-P
6
+24V-1
PGND
SGND
YES
Finished
YES
Finished
IOD2
ECN1 ECN3
+24V-1
6
12
PSL(YM)ON-N
13
ECN2
5
8
12
PSL KC