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Error code 8501
When printing from paper tray 1 to 5, the T1 paper feed sensor detected open paper tray 1
(before registering printing data to engine).
Error code 8502
When printing from paper tray 2 to 5, the T2(LT or TT) paper feed sensor detected open
paper tray 2 (before registering printing data to engine).
Error code 8503
When printing from paper tray 3 to 5, the T3(LT or TT) paper feed sensor detected open
paper tray 3 (before registering printing data to engine).
Error code 8504
When printing from paper tray 4 to 5, the T4(LT or TT) paper feed sensor detected open
paper tray 4 (before 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 actuator
2
coming off or caught in some
sections of the machine
An LT/TT paper feed sensor
3
failure
High-voltage power supply PCB
4
failure
5
An LT control PCB failure
6
TT relay PCB failure
7
TT control PCB failure
8
Main PCB failure
Cause
Install the latest main firmware.
Reattach the appropriate LT/TT paper feed
actuator.
Replace the appropriate LT/TT paper feed
sensor PCB ASSY.
Replace the high-voltage power supply 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.
2-63
Remedy
Confidential
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Table of Contents
Troubleshooting
