38
UF-5500 / 4500
6.6.
CIS Control Section
The scanning block of this device consists of a control circuit and a CIS (contact image sensor), and AFE(Analog Front End) include
A/D Converter.
When an original document is inserted and the start button pressed, pin A3 of IC300 goes to a low level and the transistor Q518
turns on.
This applies voltage to the CIS. The CIS is driven by each of the CCDSH, CCDCLK signals output from IC300, and the original
image illuminated by the LED to output an analog image signal.
The analog image signal is input to the AFE on VINP(20pin of IC503) and converted into 16-bit data by the A/D converter inside
IC503. Then this signal undergoes digital processing in order to obtain a high-quality image.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
K0.1u
C537
J100p
C556
K0.1u
C542
1.2k
R542
1.2k
R544
47
R558
K1000p
C553
4.7k
R555
NCCDON
1:6B
K1000p
C554
K0.1u
C543
+3.3V
1.2k
R550
K1u
C545
K1000p
C551
1.2k
R554
+7V
IC503
1
AGND2
2
DVDD1
3
VSMP
4
MCLK
5
DGND
6
SEN
7
DVDD2
8
SDI
9
SCK
10
OP0
11
OP1
12
OP2
13
OP3/SDO
14
AVDD
15
AGND1
16
VRB
17
VRT
18
VRX
19
VRLC/VB
20
VINP
470
R547
L501
K0
.1
u
C5
40
K0
.1
u
C5
36
1.2k
R546
+5VA_C
J100p
C547
1.2(1608)
R548
1k
R552
6
.3
V
/1
0
0
u/
1
0
5
C549
16V/22u/105
C550
+
+
K0
.0
1u
C5
44
K0.01u
C546
560
R571
Q514
B
C
E
Q516
B
C
E
Q517
B
C
E
CN510
AP1
1
SIG
2
DG
3
+3.3V
4
VREF
5
DG
6
SI
7
DG
8
CLK
9
VLED
10
LED_G
11
LED_R
12
LED_B
13
CNT
56k
R588
5.6k
R589
K1000p
C568
+3.3V
39(1608)
R556
33(1608)
R549
18(1608)
R543
DA500
2
1
3
82
R553
FLT500
1
2
3
4
Q518
0.1u
C552
AFEADC[1]
AFEADC[2]
AFEADC[3]
AFEADC[0]
TO FLAT
BED & ADF
To:CN59
Содержание UF-4500
Страница 180: ...180 UF 5500 4500 ...
Страница 248: ...248 UF 5500 4500 13 5 Test Chart 13 5 1 ITU T No 1 Test Chart ...
Страница 249: ...249 UF 5500 4500 13 5 2 ITU T No 2 Test Chart ...
Страница 281: ...281 UF 5500 4500 10 10 11 15 12 17 18 19 20 21 22 23 24 28 29 30 27 25 26 21 13 14 16 30 ...
Страница 287: ...287 UF 5500 4500 130 131 132 133 134 135 136 137 138 139 140 141 PCB2 A UF 5500 only CN1 ...
Страница 289: ...289 UF 5500 4500 PCB8 PCB4 160 161 163 162 164 167 168 171 177 178 172 173 174 173 176 169 170 162 164 A A 165 ...
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Страница 305: ...305 UF 5500 4500 ...
Страница 309: ...309 UF 5500 4500 A1 A3 A4 A6 A7 A8 A9 A10 P1 P2 P3 P4 P5 P6 P7 P8 P7 Drum Cartridge Toner Cartridge P9 A11 ...
Страница 311: ...311 UF 5500 4500 501 502 503 504 506 507 505 508 509 511 510 514 513 512 P51 P53 P54 A51 P52 ...
Страница 362: ...362 UF 5500 4500 ...
Страница 365: ...365 UF 5500 4500 Published in Japan ...