Brother HL-2600CN Service Manual page 319

Error Code
Concerned Part Belt Sensor (PBS)
Is a belt cartridge leaned to one side ?
Is a belt sensor stained ?
Confirm the connection of connector.
Is DCN16 of IOD1 properly connected with a connector of the sensor ?
Is DCN1 of IOD1 properly connected with 11CN of MCTL PWB 2?
Check the voltage (+5V-1)
Is the voltage +5V between DCN16-2 and 3 of IOD1?
Is the voltage +5V between DCN2-1 and 4 of IOD1?
Is E9 error cleared ?
Job is complete.
E9
NO
NO
YES
NO
YES
YES
Replace the belt cartridge.
Install the printer to be leveled out.
YES
Clean the belt.
Is E9 error cleared ?
NO
NO
Connect them properly.
Is E9 error cleared ?
NO
YES
Replace the belt sensor (PBS).
YES
Replace the IOD1 PWB 2.
NO
Replace the MCTL PWB 2.
MCTL IOD1
DCN1
11CN DCN16
1
PBSEN-N
29 29
2
3
DCN2
+5V-1
1
SGND
4
YES
Job is complete.
Belt Sensor
PBSEN-N
+5V-1
PBS
Sensor
SGND