Service Manual
vii
5
Theory of Operation
Overview 5-1
Functional block diagram 5-2
Print engine 5-3
Sublimation dye transfer — the engine's printing technology 5-3
The print process 5-3
Continuous-tone printing 5-4
Image data 5-4
Creating colors 5-5
Engine control board block description 5-6
CPU 5-6
Interface buffers 5-6
Thermal Head controller 5-6
Thermal head 5-7
Mechanical controller 5-7
The printing cycle 5-8
Idle 5-8
Paper clamp bar positioning 5-9
Paper pick 5-10
Paper clamp 5-11
Paper wrap 5-12
Print positioning and printing 5-13
Exit positioning 5-14
Paper unclamping 5-15
Exiting 5-16
Image processor 5-17
Image-rendering technology 5-17
