Service manual

Service Manual 5-13
Theory of Operation 5
Unlike other thermal wax printers, the DECcolorwriter 1000 does not reverse the drum
to “back up” the print to the start position for each pass during printing. This is one of
the reasons for the DECcolorwriter 1000's faster print times.
With plain-paper printing using the 4-pass, Plain Paper Transfer Roll, the first pass lays
down a precoat layer on the paper and then the yellow, magenta and cyan passes are
made.
Figure 5-8. Raising the thermal head between passes
8699-15A
Between passes,
the thermal head
raises to allow
the paper clamp 
to pass