(7) Check the copied chart, referring to the "Check Items on the ADF COPY CHART" given
below.
If any problem is found, remove the newly mounted ADF unit or ADF-related parts once
and set it (them) into place, or check and correct the connection of ADF-related harnesses.
Check Items on the ADF COPY CHART
Check that the copied chart has none of the following defects.
A: Contrast chart 1
• Black or white vertical streaks
• Patchy color
• Missing dots
B: Color blocks
• Patchy color
• In the second row, black block printed in yellow or red
• Area expansion of block(s)
• In the third row, blocks printed too dim to see
• Frames of white blocks missing or discolored
Note: Vertical streaks in color blocks are negligible.
C: Contrast chart 2
• Vertical streaks in 0.3 to 0.5 charts
(Vertical streaks only in 0.2 chart are negligible.)
• Patchy color in 0.3 to 0.5 charts
(Patchy color only in 0.2 chart is negligible.)
• Missing dots in 0.2 to 0.5 charts
D: Resolution chart
• Overlapping lines (diagonal or horizontal) in 4 to 6 mm charts
• Curved lines in 4 to 6 mm charts
• Black or color vertical streaks in 4 to 6 mm charts
• Discoloration in 4 to 6 mm charts
E: Whole page
• Ghost (image printed on the blank area)
• Color horizontal streaks
• Black vertical band
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