Ricoh C211 Service Manual page 424

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5. CCD Output Signal Convemion SS830
r ———
———
———
___
_
I
r-
———-—
—-~
I
I
I
W 1
I
I
1
+12V
+
1
I
I
w
I
I
i t
I
4I
I
I
I
t
1' -
I
- +
1
I
I
I
I
I
I
I
DCREST
I
I
I
T
I
I
1.7V I
I
I
I
I
I
'Signal
Conversion-
--
Direct
Current
----
'Amplification
---
-J
I
Clamp
SH
Approx.
6V
@
0s
CCD Output Signai Conversion
SS950
+12V
4.7K
2.2K
~
+ :_:_j
-12V
w
C669
+12V
L
IC628
T
6V
+5V
VR600
4
w
IC620
+
Vo
@
T
7)?7)7
J
1.7V
,
1
.7V
0s
5-1. Signai Conversion
The CCD output (OS) varies according
to the reflected light intensity and is clipped at 6
volts. The output signal is then buffered, inverted and amplified.
2-14
Rev.
8189

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