Panasonic DP-8020E, Service Manual

Page: 302 / 498

302
SEP 2006
Ver. 1.0
DP-8020E/8020P/8016P
6 System Description
6.1. Mechanical Operation
6.1.1. Scanning Mechanism (Flatbed)
1. Scanning Mechanism
The Scanning Mechanism consisting of Lens, CCD PCB Assembly, Mirrors, Scanner Lamp, Lamp
Base Bracket and Mirror 2 Bracket, is used to scan originals.
• The Mirror 1 and Mirrors 2 reflect image information, in the form of light, through the Lens.
• The Lens focuses the image information and passes it to the CCD.
• The CCD, mounted on the CCD PC Board, converts the image information into an electrical signal.
• The Timing Belt driven by the Stepping Motor, move the Scanner Assembly.
2. Transmit Mechanism
a. When ADF is used, originals are scanned on the Scanning (S) Glass. The Platen (L) Glass is used
when scanning on the Platen.
b. The Scanning point is established by the setting on the Panel.
c. Document size is manually set when the Platen is used.
d. The Transmit Mechanism starts feeding and scanning originals based on the above Document Size
Setting.
e. When scanning is completed, the Stepping Motor stops rotating and the Lamp Base and Mirror 2
Brackets return to the standby position.
During scanning, the Lamp Base Bracket and Mirror 2 Bracket move in the direction of the Black arrow
and while returning to standby position, it moves in the direction of the White arrow as shown in the
illustration. The location of these two brackets and the scanning length are established by the setting
on the Panel. The following illustration shows the Drive system.
Scanner Lamp
Mirror 1
Reflection Plate
Scanning (S) Glass
Platen (L) Glass
Driving Wire
Timing Belt
Mirror 2
Mirror 2
Lamp Base Bracket
Scanning Motor
Scanning Lens
CCD PC Board Assembly
Size Sensor 1