Brother HL-L5000D Service Manual page 98

 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 8701
MX 1bin, 2bin, 3bin, or 4bin stack sensor or machine stack sensor detected the ejected paper
full state at the start of printing.
<User Check>
• Remove the paper from all output trays.
Step
Malfunction of the MX control
1
PCB
2 Machine stack sensor failure
3 MX control PCB failure
4 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
Install the latest main firmware.
Replace the machine stack sensor.
Replace the MX control PCB ASSY.
Replace the main PCB ASSY.
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Remedy
Remedy
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