Circuitdescriptionof Ccd Pwb - Sharp FO-155 Service Manual

FO-155A
FO-355A
[5] Circuit description of CCD PWB
The CCD board picks
up opticalinformation from the document, c on-
verts it into an electrical(analog)signaland transfersit to the control
bead.
(1) Block diagram
Vo
+
OUTPUTCIRCUIT
(emitter
follower)
H
1 J 1
Fig.8
(2) Description of blocks
1.
CCD
The TCD1200SUP is a highly sensitive charged coupled image sen-
sor that consists of 2160 picture elements.
Receiving fourdrivesignal(@T, @2, @l,oR)fromthe controlboard,the
transferred photoelectric analog signal OS is impedanceconverted,
andthesignalVO,is supplied to thecontrolboard.
2. Waveforms
—
1. $1,$2 (=$1)signalswithinthecontrolboard.
$T~
...... J:;prOx"'v
""='''uuu"uuln;;prox";vprox
Approx.IOOmV
Approx.5V
0"
Fig.9
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