Brother DCP-L5500D Service Manual page 99

 Error code 8505
When printing from paper tray 1 to 5, the T1 paper feed sensor detected open paper tray 1
(after registering printing data to engine).
Error code 8506
When printing from paper tray 2 to 5, the T2(LT or TT) paper feed sensor detected open
paper tray 2 (after registering printing data to engine).
Error code 8507
When printing from paper tray 3 to 5, the T3(LT or TT) paper feed sensor detected open
paper tray 3 (after registering printing data to engine).
Error code 8508
When printing from paper tray 4 to 5, the T4(LT or TT) paper feed sensor detected open
paper tray 4 (after registering printing data to engine).
<User Check>
• Close the appropriate paper tray correctly.
Step
Malfunction of an LT control
1
PCB or TT control PCB
An LT/TT paper feed sensor
2
failure
3 An LT control PCB failure
4 TT relay PCB failure
5 TT control PCB failure
6 Main PCB failure
 Error code 8702
Machine stack sensor detected the ejected paper full state at the start of printing.
<User Check>
• Remove the paper from the machine output tray.
Step
Machine stack actuator coming
1 off or caught in some sections of
the machine
2 Machine stack sensor failure
3 Main PCB failure
Cause
Install the latest main firmware.
Replace the appropriate LT/TT paper feed
sensor PCB ASSY.
Replace the appropriate LT control PCB ASSY.
Replace a TT relay PCB ASSY.
Replace the TT control PCB ASSY.
Replace the main PCB ASSY.
Cause
Reattach the machine stack actuator.
Replace the machine stack sensor.
Replace the main PCB ASSY.
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Remedy
Remedy
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