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Table 5-6. Conditions of available duplex feed
Paper size Print mode Duplex feed mode
A4, Letter Plain paper
Gloss paper
Gloss film
1 sheet feed
Plain paper
Thin paper
2 sheets feed
Alternate feed
Legal Plain paper, Thin paper 1 sheet feed
The duplex feed mode can be selected by command from the formatter. Please note that the
duplex print is available only for the media in the print mode (plain, thin, gloss paper, gloss
film) shown in the table.
Jam detection
This printer has the following sensors to detect the presence and positions of papers:
● Registration paper sensor (PS4)
● Fuser front paper sensor (PS6)
● Fuser delivery paper sensor (PS7)
● Face-down delivery paper sensor (PS8)
● Reversed paper sensor (PS9)
● Duplexing feed paper sensor (PS10)
The microcomputer (CPU) in the DC controller identifies a paper jam by checking whether
the paper is present at the sensor at the checking time. The checking time is stored in its
memory. When it judges so, the CPU stops the printer and sends a paper jam notice to the
formatter.
The following is the timing of the paper jam detection. The specified time (T) is based on the
normal feed speed (1/1).
1. Pickup delay jam: This printer checks the paper movement at all pickup sources twice, if
necessary, as the paper pickup can be delayed due to a pickup error.
When paper does not reach the registration paper sensor (PS4) within the allotted time
after paper pickup, the CPU judges it a pickup delay jam.
2. Pickup stationary jam: When the paper does not pass the registration paper sensor
(PS4) within the allotted amount of time after paper is fed from the registration roller, the
CPU judges it a pickup stationary jam.
3. Fuser delay jam: When the paper does not reach the fuser delivery paper sensor (PS7)
within the allotted amount of time after paper is fed from the registration roller, the CPU
judges it a fuser delay jam.
4. Fuser stationary jam: When the paper does not pass the fuser delivery paper sensor
(PS7) within the allotted amount of time after paper has reached the fuser delivery paper
sensor (PS7), the CPU judges it a fuser stationary jam.
5. Delivery delay jam: When the paper does not pass the sensor through within the allotted
amount of time after paper has reached the fuser delivery paper sensor (PS7), the CPU
judges it a delivery delay jam.
ENWW Pickup/feed system 195