Canon F-1, Service Manual

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Technology > Basic configuration > Reader > Scanner unit
Technology > Basic configuration > Reader > Scanner unit
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Scanner unit
Original exposure and scanning are performed by the integrated scanner unit of LED, mirror,
lens and reading sensor.
Light emitted from LED is reflected by the original and reaches the reading sensor through
the 3 folding mirrors and 4 free curvature mirrors.
1. LED lamp unit
On LED lamp unit, the light is generated from the 2 LED lamp PCBs (LED chip: 54 pieces per
PCB).
Generated light is exposed to the original through the reflection plate.
2. Free curvature mirror
Scanner unit is equipped with the 3 folding mirrors and 4 free curvature mirrors.
Free curvature mirror has symmetric facet in main scanning direction and asymmetric facet in
sub scanning direction against the optical axis.
3. Reading sensor
Reading sensor scans the image per 1image line.
Reading sensor has 4 lines (R, G, B, BW). At B&W scanning, it uses 1 line (B/W) and uses 3
lines (R, G, B) at color scanning.
Error code
E301 (insufficient light intensity)
-0001 The light intensity during front side shading is lower than the standard level
LED (light source)
Mirror
No.4
Mirror
No.2
Mirror
No.5
Mirror
No.3
Mirror
No.1
Lens
[
Red (R) line
]
[
Greeen (G) line
]
[
Blue (B) line
]
[
Black & white (B / W) line
]
CCD
Reader Scanner
Unit PCB
Reader LED Lamp
PCB (Left)
Reader LED Lamp
PCB (Right)
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