Basic Operation; Carriage Assembly - Epson Perfection 1250 Service Manual

EPSON Perfection 1250/1250 PHOTO

2.1 Basic Operation

This chapter describes the basic operation of the Perfection 1250/1250
PHOTO engine.

2.1.1 Carriage Assembly

The carriage assembly consists of a CCD sensor circuit board, an inverter
circuit board, a lamp (light source), and a mirror and lens mechanism.
Lamp
CCD sensor circuit board
Figure 2-1. Carriage Assembly Structure
#
CCD sensor circuit board
This board consists of color CCD line sensors (independent R, G and B)
and circuits for controlling them.
#
Inverter circuit board
This board boosts the power supply voltage to +24 V DC and converts it
from direct current to alternating current in order to drive the lamp (cold-
cathode fluorescent lamp).
#
Lamp
A cold-cathode fluorescent lamp is used as the light source.
Front
Rear
Inverter circuit board
CCD sensor
#
Mirror and lens mechanism
The light that illuminates the document being scanned is reflected to the
mirror and lens mechanism inside the carriage unit. The CCD sensor
separates R, G and B components.
Front
Scanning
direction
Mirror 1
CCD sensor
CCD
Figure 2-2. Mirror and Lens Mechanism
Technical Overview
Rear
Document
Lamp
Mirror 3 Mirror 2
Mirror 4
Lens
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