Ricoh A172 - Page 51

No. Item Contents Details
6
Optics Cooling
Fan Filter
The filter material has changed.
It is easier to replace the filter.
The air flow has improved to
reduce temperature rises in the
optics cavity. For replacement,
see section 5 for details.
Image Processing
1
RGB Filter The RGB filter coefficient for
each copy mode (letter/photo)
has been changed.
To improve gradation and
reproduction quality.
2
Color Correction New matrixes and masking
coefficients have been added to
match the new copy modes.
See 4.4 in section 2 for details.
3
Image
Separation IC
The image separation IC has
been changed.
To reduce photo/letter image
separation errors in auto detect
mode.
Laser Exposure
1
Drum Mirror A heavier stabilizer has been
installed on the Drum mirrors.
To reduce the occurrence of
banding on copies.
Development
1
Development
Sleeve Roller
The sleeve rollers have been
changed to a sand-blast type.
To eliminate the 1.25 mm
horizontal lines in halftone image
areas caused by the grooves on
the sleeve roller.
Toner Tank
1
Toner Tank A toner end sensor has been
added for each color.
See 6.2 in section 2 for details.
The green lever has been
eliminated.
See 6.2 in section 2 for details.
A toner tank detection
mechanism has been added.
When the tank is pulled out, it is
disconnected electrically from
the main body.
See 6.2 in section 2 for details.
Transfer Belt
1
Transfer Belt
Bias
The number of threshold levels
that decide transfer belt bias
depending on environmental
conditions has changed from 2 to
4.
See 7.1 in section 2 for details.
2
Transfer Belt
Cleaning
The belt lubricant mechanism
has changed to apply lubricant
directly to the transfer belt.
To prevent partial blanking of
lines (due to incomplete toner
transfer) from appearing on
copies.
See 7.2 in section 2 for details.
A172/A199 2-2 SM