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2.3.1 Exterior components
This section gives information on exterior components of the printer: covers, removable mechanism units, etc.
The upper cover is fastened with screws at the back (two for the DL9300 and three for the DL9400).
(1) Upper cover
The interface cable connector is on the right side of the printer, as seen from the front of the upper cover, so
the interface cable does not interfere with the paper feed path.
(2) Front cover
The front cover is opened to replace the ribbon cartridge.
(3) Paper table
The paper table guides a cut sheet manually fed by the user. It can also stack printed cut sheets when it is set
at the "down" position.
(4) Rear stacker
The rear stacker holds printed cut sheets. It must be set at the "down" position when an optional cut-sheet
feeder is installed at the back of the printer.
(5) Control panel
The control panel consists of an LSI, nine push-button switches, eight LEDs, and a buzzer. The switches are
used for operations such as loading and feeding paper and controlling printing pressure. Some switches are
also used in setup mode in place of the DLMENU. The LEDs indicate printer basic statuses and paper feed
path conditions. The buzzer sounds to indicate certain operating and printer statuses.
2.3.2 Printing mechanism
The two screws secure the printing mechanism to the bottom cover. The two hooks on the bottom cover hold the
mechanism in position.
(1) Carriage
The carriage supports the print head and ribbon cartridge, and slides left and right on the stay shaft. The
ribbon feed gear system moves the ribbon in one direction regardless of carriage movement. It has three
sensors: LRES, TOF, and APTC. The LRES detects both left and right ends of the carriage movement. The
TOF detects the top edge of paper. The APTC detects the gap between the print head and the platen.
(2) Carriage drive mechanism
The stay shaft and the stay guide support the carriage; the stepping motor and timing belt move the carriage
horizontally.
(3) Paper feed mechanism
The stepping motor drives the platen and/or tractors through gears to feed paper. See also the HCPP mecha-
nism.