Brother DCP-L8400CDN Service Manual page 92

■
Error code 7300
Jam Tray 1
Pull the paper tray1 completely out of the machine and remove the jammed
paper.
In the case of printing by feeding paper from the paper tray 1, after the T1 paper feed sensor
detects paper pass, the registration front sensor does not detect paper pass after a set period
of time.
< User Check >
- Remove the jammed paper.
- Check if the paper tray 1 is closed correctly.
Step
Foreign object at the front of the
1
paper tray 1
T1 paper dust cleaning roller
2
installation failure
Registration front actuator that
3
has come off or that has been
caught
Connection failure of the
4
registration front/rear sensor
PCB harness
Registration front sensor failure
5
Paper feed related gear
6
damaged
Main PCB failure
7
■
Error code 7400
Jam Tray 2
Pull the paper tray2 completely out of the machine and remove the jammed
paper.
In the case of printing by feeding paper from the T2 paper tray unit, after the T2 paper feed
sensor detects paper pass, the registration front sensor does not detect paper pass after a set
period of time.
< User Check >
- Remove the jammed paper.
- Close the paper tray 1 and T2 paper tray unit correctly.
Step
Foreign object at the front of the
1
paper tray 1
Foreign object at the front of the
2
T2 paper tray unit
T1/T2 paper dust cleaning roller
3
installation failure
Registration front actuator that
4
has come off or that has been
caught
Connection failure of the
5
registration front/rear sensor
PCB harness
Registration front sensor failure
6
Paper feed related gear
7
damaged
Main PCB failure
8
Cause
Remove the foreign object.
Re-assemble the T1 paper dust cleaning
roller.
Re-assemble the registration front
actuator.
Reconnect the registration front/rear
sensor PCB harness.
Replace the registration front/rear sensor
PCB ASSY.
Replace the main drive unit.
Replace the main PCB ASSY.
Cause
Remove the foreign object.
Remove the foreign object.
Re-assemble the T1/T2 paper dust
cleaning roller.
Re-assemble the registration front
actuator.
Reconnect the registration front/rear
sensor PCB harness.
Replace the registration front/rear sensor
PCB ASSY.
Replace the main drive unit.
Replace the main PCB ASSY.
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Remedy
Remedy
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