Ricoh FT4460 Service Manual page 296

28 February 1989
6.3 CHARGE CORONA HEIGHT ADJUSTMENT
NOTE: Adjust the charge corona height after cleaning the optics section.
Adjust the charge corona height to achieve even gradation [A] using an OS-
A3 test chart as following order.
1) Place the charge corona unit on a flat surface with the grid side [B] down.
2) Measure the height of the rear side of the corona wire [C].
3) Adjust the front side to be eqal to the rear measurement.
NOTE: Measurement should be approximately 9 mm.
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