Service manual

Service Manual 1-5
General Information 1
Combination sensors and their meanings
Combinations of sensors are used by the DECcolorwriter 1000 to determine the type of
transfer roll and the type of media tray installed in the printers.
Transfer roll type sensing
The combinations of the two transfer roll core sensors “tell” the print engine what type of
transfer roll is installed. The length of the cores (long or short) actuate the switches.
Long cores close the switches, turning them on.
Table 1-1. Transfer roll core sensor combinations
Left transfer
roll core
sensor
Right transfer
roll core
sensor
Transfer roll type
Closed Open Plain Paper Transfer Roll
Open Open 3-Color Transfer Roll (for coated paper)
Closed Closed Black Transfer Roll (for coated paper)