Ricoh A085, Руководство пользователя

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9.2 UNEVEN EXPOSURE ADJUSTMENT
When: If the exposure is uneven.
Purpose: To maintain even exposure.
Adjustment standard: The side-to-side variation of the gray scales on
the test chart should be less than one level.
How: Change the position of the exposure adjusting
plates to make the light intensity from the
exposure lamp even across its length.
NOTE: Do not adjust the charge corona wire height to correct uneven image
density on the copy. Otherwise, the total charge corona current will
change, causing incorrect toner density control.
1. Clean the optics components and the charge corona wire.
2. Place a test chart on the exposure glass and make an A3/11" x 17" copy.
3. If the side-to-side variations of the gray scales is not within the
adjustment standard, turn off the main switch and remove the exposure
glass (see Exposure Glass Removal).
4. Position the adjusting plates [A] so that the copy image meets the
adjustment standard. The leading edges [B] of the three adjusting plates
must be aligned to avoid white streaks.
[A]
[B]
Replacem
ent
Adjustm
ent
12 February 1992 COPY QUALITY ADJUSTMENT
5-87