Toshiba e-studio550 Service Manual page 167

11. 4. 4. Construction
• Image quality sensor
• D/A converter
• Laser optical unit
• A/D converter
• Image formation process system
• CPU
Image quality sensor
Reflected light
amount signal
JUNE 2002 © TOSHIBA TEC
: Emitting of the light which corresponds to the light control
voltage to output the voltage which corresponds to the
reflective light amount for the toner image on the drum
: Outputting of the light source light control voltage
: Carrying out the test pattern exposere to form the toner image
: Converting of the sensor output voltage into the digital value
: Charging/Laser exposuring/Developing
: Carrying out of the procedure [1]~[7] described in the previous
page
Image formation process system
Main charger
Drum
Test pattern
Light source
amount signal
A/D D/A
Main CPU
11 - 5
Laser exposure
Developing
Various image
formation conditions
e-STUDIO550/650/810 DRUM/CLEANER UNIT