Lexmark OptraImage 443, Service Manual

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Lexmark Internal Use Only 1-12
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:
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 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