Brother HL-L3210CW - Page 88

2-69
Confidential
■ Error code 7800
After the first side is printed in 2-sided printing, the registration front sensor does not detect
paper pass after a set period of time.
<User Check>
• Remove the jammed paper.
• Close the back cover correctly.
■ Error code 7900
When feeding from the manual feed slot, the registration rear sensor does not detect the
paper pass within the specified time after the manual feed paper empty sensor detected the
paper pass. Or the registration rear sensor detected the paper pass within the specified time
after the manual feed paper empty sensor detected the paper pass.
<User Check>
• Remove the jammed paper.
• Set the paper individually in the manual feed slot.
Step Cause Remedy
1
Foreign object in the rear of the
machine or duplex tray
Remove the foreign object.
2
Connection failure of the duplex
clutch harness
Reconnect the duplex clutch harness.
3 Duplex clutch failure Replace the paper feed unit.
4 Paper eject roller failure Replace the paper eject ASSY.
5 Duplex unit failure Replace the duplex unit.
6 Main PCB failure Replace the main PCB.
Step Cause Remedy
1
Foreign object in the rear of the
machine or manual feed slot
Remove the foreign object.
2
Manual feed cover ASSY
attachment failure
Reattach the manual feed cover ASSY.
3
Registration rear actuator
attachment failure
Reattach the registration rear actuator.
4
Connection failure of the manual
feed paper empty/regist rear/
regist front sensor harness
Reconnect the manual feed paper empty/
regist rear/regist front sensor harness.
5
Manual feed paper empty/regist
rear/regist front sensor PCB
failure
Replace the paper feed unit.
6 Main PCB failure Replace the main PCB.