18-2.Color Shift Detection - Minolta CF1501 Service Manual

18-2. Color Shift Detection
• Patterns are produced on the surface of the Transfer Belt and the Registration Sensors
detect any color misalignment on the patterns.
1. A light-emitting diode emits infrared rays illuminating the color shift pattern on the
Transfer Belt.
2. The photoreceiver detects the intensity of the infrared light reflected off the color shift
pattern on the Transfer Belt.
3. A voltage corresponding to the intensity of the reflected light is output to the PIC Board.
Photoreceiver
Output
LED
Transfer Belt
4004M532AA
M-68
GND Power Source
1136M068AA