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ERROR CODE and TROUBLESHOOTING
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8.3.6 Cover open jam
[E400] Duplexing unit open
[E430] ADU open jam
Classification Error item
Cover open jam The duplexing unit has opened during printing.
Check item Measures
Duplexing unit • Close the duplexing unit if it is opened. Remove if there is
any paper before closing it
24V power • 24V check
(Perform the input check: 03-[COPY] ON/[6]/[A])
• Connector check
• Harness check
Fuse • Fuse check (F201, F202, F203, F204)
• Board check
LGC board • Connector check (CN312)
• Board check
Interlock switch • Switch check
(Perform the input check: 03-[SCAN] ON/[4]/[G])
• Connector check
• Harness check
Replace parts Remarks
Fuse
LGC board
Switching regulator
Interlock switch
Classification Error item
Cover open jam The ADU has opened during printing.
Check item Measures
ADU • Close the ADU if it is opened. Remove if there is any
paper before closing it
ADU opening/closing switch • Switch check
(Perform the input check: 03-[SCAN]ON/[4]/[F])
• Connector check
• Harness check
ADU board • Connector check (CN211, CN217)
• Board check
LGC board • Connector check (CN338)
• Board check
Replace parts Remarks
ADU opening/closing switch
ADU board
LGC board
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