Genicom MatrixPrinter LA36 - Manual (Page 16)

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f. Cut-sheet stand
The cut-sheet stand catches printed pages ejected by the printer. It must be raised while printing cut sheets
and laid down while printing continuous forms. It must also be raised while printing paper-stapled continu-
ous forms in push-tractor mode.
g. Back cover
The back cover, which is installed on the cut-sheet stand, is opened to set continuous forms on the tractor
unit from the back of the printer. It must be closed while the printer is operating.
(2) Printing mechanism assembly
The two hooks on the bottom cover hold the printing mechanism in place and the two screws fasten it to the
bottom cover.
a. Frame assembly
The frame assembly consists of metal plates, a rack rail for ribbon feeding and a paper feed assembly.
b. Carriage unit
The carriage unit supports the removable 24-wire print head and endless inked-ribbon cartridge (black or
four-color), and slides back and forth on the stay shaft. The ribbon feeder (gear system) moves the ribbon in
one direction regardless of carriage movement. The color kit, consisting of a color selection shift motor and
four-color ribbon, is installed on the cartridge. One of the two sensors detects left, right, top, and bottom
edges of paper and the other detects the left end of cartridge movement and information on installed options.
c. Space motor and stay shaft assemblies
The main stay shaft and guide rail support the carriage unit, which the space motor moves horizontally
through the timing belt. The paper thickness lever rotates the eccentric main stay shaft that adjusts the gap
between the print head and platen.
d. Sensors
Three of four sensors detect paper outages and the other detects the paper select lever.
e. Forms feed mechanism
The paper feed motor drives the platen and/or the tractor unit via gears in feeding paper. The paper select
lever switches power transmission to the tractor unit.
f. Tractor unit
The convertible tractor unit is used on the back of the printer as a push tractor and on top of the printer as a
pull tractor.
Bail roller unit (LA36N only)
The bail rollers hold down paper on the platen. For the LA36W, the bail rollers are built in the top cover.