Gestetner G060 Service Manual page 456

IMAGE ADJUSTMENT
Adjustment Procedure
1. Copy the C-4 test chart in the mode that you are going to adjust.
2. Enter the SP mode.
3. Select "Copy SP".
4. Select SP4-9xx that you are going to adjust.
5. Adjust the offset values until the copy quality conforms to the standard ( the
table below).
NOTE: 1) Never change "Option" value (default value is 0).
2) Adjust the density in order from "ID Max", "Middle", "Shadow", and then
"Highlight".
- Standard Copy Quality in Color Text/Photo Mode -
Standard Copy Quality in Color Text/Photo Mode
Step Item to Adjust
ID max:
1 (K, C, M, and Y)
Middle (Middle ID)
2 (K, C, M, and Y)
Shadow (High ID)
3 (K, C, M, and Y)
Highlight (Low ID)
(K, C, M, and Y)
4
K Highlight (Low ID)
(C, M, and Y)
5
<on the full color
copy> only for Photo
G570
Level on the C-4 chart
3-8
Adjustment Standard
Adjust the offset value so that
the density of level 10 matches
that of level 10 on the C-4 chart.
Adjust the offset value so that
the density of level 6 matches
that of level 6 on the C-4 chart.
Adjust the offset value so that
the density of level 8 matches
that of level 8 on the C-4 chart.
Adjust the offset value so that
dirty background is not visible on
the copy and the density of level
3 is slightly lighter that of level 3
on the C-4 chart.
Adjust the offset value so that
the color balance of black scale
levels 3 through 5 in the copy is
seen as gray.
SM