Uneven Exposure Adjustment - Ricoh FT7770 Service Manual

3. Uneven Exposure Adjustment

CAUTION: Be careful not to damage the reflector or the fiber-optic cable.
ADJUSTMENT STANDARD: The side-to-side variation of the gray scales
1.
Place the test chart on the exposure glass and make a copy. If the test
copy is not within specifications, continue with this procedure.
Turn off the main switch.
2.
Remove the exposure glass.
3.
Position the adjusting plates [A] so that the copy image meets the
4.
adjustment standard.
be aligned to avoid white streaks.
of the test chart should be less than 1 level.
(Refer to "Exposure Glass Removal".)
The leading edge of the four adjusting plates must
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April, '89