System Overview; Electronics Overview - AGFA Avantra 36/44 Service Manual

• Software
• PC Board: LED Descriptions
• Warnings and Indications
2.2

System Overview

The Avantra is a floor-standing unit. It has a simple, language independent control
panel, utilizing icons and a touch screen display. The system is designed to inter-
face via the Agfa Print Engine Interface Standard (APIS) to a single Image Control
System (ICS), which is packaged separately from the imagesetter.
The Avantra consists of a 211 degree internal drum in which a high-speed spinning
deflector moves along the central axis of the drum on a linear carriage. The spin-
ning deflector scans the inner circumference of the drum as it gradually moves
along the length of the drum axis.
The medium (paper, film, or plate) feeds automatically onto the drum surface prior
to the imaging process. Compression and clamping methods hold the medium
firmly against the drum during imaging. There is no medium movement during the
process. After imaging, the medium moves into a removable, powered, take-up
cassette. The medium can now either be cut with the motorized cutter and
removed for processing, or the next job can be imaged and fed into the cassette.
The exposure source is a solid state laser diode (650nm) that focuses to a spot size
of 7.7 microns (.30 mil) at the medium surface with a maximum addressability of
3600 pixels per inch. The imagesetter also supports 2400, 1800 and 1200 dpi
addressability modes with a proportionately larger spot size.
2.3

Electronics Overview

A multi-controller/FLASHROM system made up of four micro-controllers and three
FLASHROMs comprises the Avantra's electronics:
• Operator control panel (OCP) micro-controller
• Digital engine controller (DEC K1) micro-controller
• DSP micro-controller
• DIAG micro-controller
• OCP FLASHROM
• DEC K1 FLASHROM
• DSP FLASHROM
The micro-controllers link serially via a low-speed bus called the Serial Peripheral
Interface (SPI) bus. All data exchanges among the micro-controllers and peripheral
devices (e.g., motors D/A and A/D) take place via the SPI bus.
Section I: Imagesetter
Functional Analysis 2-3