Brother HL-L2300D Service Manual page 59

 Error code 7700
Jam 2-sided
Pull out the Duplex Tray at the back of the machine and remove the jammed paper.
The registration front sensor does not detect paper pass within the specified time after the
first side was printed in duplex printing mode.
<User Check>
• Remove the jammed paper.
• Close the back cover correctly.
• Close the paper tray correctly.
Step
Foreign object in the duplex
1
paper feed system
Foreign object in the duplex
2 paper feed system of the paper
tray
Back cover attachment failure
3
Fuser cover attachment failure
4
Duplex tray failure
5
Damaged gears in the feeding
6
system
Main PCB failure
7
 Error code 7C00
Cover is Open
Make sure there is no paper jammed inside the machine and close the Back Cover,
then press Go.
The eject sensor was ON when the power switch was turned ON.
<User Check>
• Close the back cover correctly.
Step
Eject actuator caught in sections
1
of the machine
Fuser cover attachment failure
2
Back cover attachment failure
3
Eject sensor failure
4
Main PCB failure
5
Cause
Remove the foreign object.
Remove the foreign object.
Reattach the back cover.
Reattach the fuser cover.
Replace the duplex tray.
Replace the main frame L ASSY.
Replace the main PCB ASSY.
Cause
Reattach the eject actuator.
Reattach the fuser cover.
Reattach the back cover.
Replace the eject sensor PCB ASSY.
Replace the main PCB ASSY.
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Remedy
Remedy
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