Service manual

1-6 DECcolorwriter 1000
1 General Information
Media tray type sensing
The combinations of the three tray sensors “tell” the Phaser 200e what type of paper tray
is installed. (The print engine does not detect the type of media installed in the tray; it
only detects the particular tray used with the media.) The tray sensors are located on the
right-side interior of the paper tray slot. There are four different tray types:
n Letter Perforated Media. This tray is used for paper and transparency film
with the tear-off perforation. This extra-long media accounts for the portion
of the media held by the drum's paper clamp during printing (and therefore
cannot be printed upon.) After tearing off the perforated end of the print, the
result is a letter-size print in which the image is printed evenly to all four of
the paper’s edges. A slide switch on the side of the media tray lets you select
either paper or transparency film.
n Letter Plain Paper. This tray is sized for 8.5 x 11-inch plain paper. It is used
when printing with the Plain Paper Transfer Roll.
n A4 Perforated Media. This tray is used for the metric equivalent of the
Letter-size perforated media. A slide switch on the side of the media tray lets
you select either paper or transparency film.
n A4 Plain Paper. This tray is sized for 210 x 297-mm plain paper. It is used
when printing with the Plain Paper Transfer Roll.
Lower tray assembly. The identical sensor combination scheme is used to determine
the type of tray (referred to as the lower tray) installed in the Lower Tray Assembly.
(The Lower Tray Assembly is sometimes referred to as the second feeder.)
Table 1-2. Tray switch sensor combinations
Bottom
switch
Middle
switch
Top switch Tray type
Open Closed Open Letter – Perforated paper
Open Open Closed Letter – Perforated transparency film
Open Closed Closed Letter – Plain paper
Closed Open Open A4 – Perforated paper
Closed Open Closed A4 – Perforated transparency film
Closed Closed Closed A4 – Plain Paper