Lexmark OptraImage 443 Service Manual page 16

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1.6.3.2
1.6.3.2
1.6.3.2
1.6.3.2
SCSI interface:
SCSI interface:
SCSI interface:
SCSI interface:
This scanner and the host are connected via the SCSI interface. It is an 12-bit, asynchronous SCSI
interface and can be connected to both SCSI-1 and SCSI-2 interfaces.
1.6.3.3
1.6.3.3
1.6.3.3
1.6.3.3
Video circuit:
Video circuit:
Video circuit:
Video circuit:
The video circuit of this scanner includes: CCD driving circuit, CCD signal processing circuit.
1 CCD Driving Circuit
The CCD driving circuit is used to generate correct signals to the CCD, so that the CCD
may generate the correct image data.
Pin Assignment for Flatbed Video Circuit J5:
Lexmark Internal Use Only
Pin No.
Name
Function
1
A.G
Analog Ground
2
VOR
CCD red Channel Output Signal
3
A.G
Analog Ground
4
VOG
CCD Green Channel Output Signal
5
A.G
Analog Ground
6
VOB
CCD Blue Channel Output Signal
7
A.G
Analog Ground
8
+24Va
Analog +24V Power Supply
9
RS
CCD Reset Gate
10
Clamp
CCD Clamp Signal
11
PH1
CCD Clock Phase
12
PH2
CCD Clock Phase
13
D.G
Digital Ground
14
SH
Channel Shift Gate
15
D.G
Digital Ground
16
+5V
+5V Power Supply
17
D.G
Digital Ground
18
Lamp V
Inverter Power Supply
19
Lamp V
Inverter Power Supply
20
H.G
Inverter Ground
21
H.G
Inverter Ground
22
Home
Sensor
1-12

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