Ricoh D0C8, Service Manual

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Image Adjustment
D0CA/D0C9/D0C8/D0CB 4-262 SM
2: 600 x 600 photo mode (2bit/4col) (Default)
3: 600 x 600 photo mode (1bit/4col)
4: 1200 x 1200 text mode (1bit/4col)
5: 600 x 600 text mode (4bit/4col)
6: 600 x 600 text mode (2bit/4col)
7: 600 x 600 text mode (1bit/4col)
5.
Execute SP1-103-001 to print out a color grayscale chart sheet if you want to examine the
image quality for these settings.
6.
Adjust the color density with SP1-104. Compare the color grayscale chart sheet with the
C-5Y chart.
1. Adjust the density in this order: "Shadow", "Middle", "Highlight".
2. Check that the following reference patches on the grayscale chart are within the
following range of the C-5Y chart.
Item to adjust Reference patch on the
grayscale chart
(related to the half tone area)
Level on the C-5Y chart
(13 rows scale)
Shadow (High
ID) 12th patch from the lighter
density C,M,Y: 6 to 10, Center is the
8th row
K: 8 to 12, Center is the 10th
row
Middle (Middle
ID) 8th patch from the lighter density C,M,Y: 3 to 7, Center is the
5th row
K: 5 to 9, Center is the 7th
row
Highlight (Low
ID) 4th patch from the lighter density C,M,Y: 1 to 4, Center is the
2nd row
K: 1 to 5, Center is the 3rd
row
K C M Y
Shadow SP1-104-002 SP1-104-022 SP1-104-042 SP1-104-062
Middle SP1-104-003 SP1-104-023 SP1-104-043 SP1-104-063
Highlight SP1-104-001 SP1-104-021 SP1-104-041 SP1-104-061
7.
Use SP1-105-001 to keep the adjusted settings.
8.
Turn the main power OFF and ON.
4.20.8 COLOR SKEW ADJUSTMENT
The skew adjustment of this machine should be performed manually. The adjustment procedure