6. When the optional duplex unit is detached, place the power cable inside the slot on the side
of the duplex unit, and then push the duplex unit along the rails into the rear of the printer.
7. Push the duplex unit securely into the printer.
• When printing on normal paper, keep the envelope lever in its original position (raised).
When Printing on Envelopes Frequently
The printer can be configured not to display an error message when the envelope lever is lowered.
When [Do not Display] is selected, the position of the envelope lever will not be reported by an error
message or alarm light.
9. Troubleshooting
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