Brother HL-2600CN Service Manual page 305

Error Code
Name of Part
Developer Clutch 2 (DCLY)
Confirm the connection of Connector.
Is the connection proper between ECN14 of IOD2 and Clutch (DCLY) ?
Is the harness of Clutch (DCLY) broken ?
Check the voltage at DCLY ON-N.
+24V
Does the voltage drop ( ) between ECN14-3 and ECN2-6?
Does the voltage jump ( ) between ECN1-3 and ECN2-8 ?
Replace current MCTL PWB 2 with a new PWB.
Is D1 Error cleared ?
Complete
D1
YES
NO
NO
YES
NO
Connect the harness.
Connect the connector properly.
Is D1 Error cleared ?
NO
YES
Replace the clutch (DCLY) with a new clutch.
YES
Replace IOD2 PWB 2 with a new IOD2 PWB 2.
Is D1 Error cleared ?
NO
NO
Re-check
MCTL
12CN
DCL(Y)ON-P
3
+24V-1
PGND
SGND
YES
Complete
YES
Complete
IOD2
ECN1 ECN14
Developer Clutch 2 (Y)
+24V-1
3 1
DCLY
DCL(Y)ON-N
3
ECN2
3
6
8