Lanier GX3050 - Manual (Page 115)

112
Troubleshooting
1. Close the cover.
Check that the duplex unit is correctly attached and the duplex unit cover is closed.
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p.20 "Detaching and Reattaching the Multi Bypass Tray (Optional)"
Duplex Unit Not Detected
The duplex unit is not attached correctly. Follow the procedure below to attach the duplex unit correctly.
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If the bypass tray is attached to the printer, detach it.
1. Lock the lever for attaching the duplex unit.
Even if you are not duplex printing, the duplex unit must be attached. Otherwise printing will not start.
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p.20 "Detaching and Reattaching the Multi Bypass Tray (Optional)"