Epson GT-7000 Photo, Service Manual

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EPSON GT-7000 Chapter 2 Operating Principles
Rev. A 14
2.1 Engine Mechanism
This section explains the engine function and operating principles.
Engine can be divided into Carriage Unit and Carriage Move
Mechanism.
2.1.1 Carriage Unit
Carriage Unit is mainly composed of CD sensor board, Inverter board,
Lamp (light source), Mirror and Lens mechanism. (See figure 2-1, 2-2)
Figure 2-1. Carriage Unit Component
CCD Sensor Board: This board has Color CCD line sensor
(independent R,G,B), and controls it and drives
circuit.
Inverter Board: This board generates voltage to drive the lamp
by pressuring up the +24VDC and converting it
from direct current to alternating current.
Lamp: White cold fluorescent Lamp is used as light
source. When the light quantity is not stable,
the scanner blinks the Operate light until the
light becomes stable and goes to stand-by mode.
Mirror and Lens Mechanism:The light emitted to the document
reaches the CCD sensor after being
reflected on some mirrors one after
another. Not by changing the light
source to create R/G/B light component
which can be found in the previous
models, Color CCD itself creates each
R/G/B light component.
Figure 2-2. Mirror, Lens Mechanism
R e a r
F r o n t
I n v e r t e r B o a r d
L a m p
C C D S e n s o r B o a r d
C C D S e n s o r
F r o n t R e a r
S c a n n e d i m a g e
D o c u m e n t
L a m p
L e n s
C C D S e n s o r
M i r r o r 1
M i r r o r 2
M i r r o r 4
M i r r o r 3
C C D S e n s o r
B o a r d