Ricoh C211 Service Manual page 550

c Adjustment z
1. Optical Adjustment
Double check all optical component adjustments, because these adjustments influence
each other.
The following table shows the reciprocal relationship between adjustment procedures.
When the adjustment procedures in the vertical section are performed, the indicated ad-
justment procedures in the horizontal section should also be done.
Check Item
output of Scan Line Reading Start
Focus
Reduction
Shading
Position of
Ratio
Adjustment Item
White Level Position Main Scan (MTF)
(Moire)
output of
White Level
Shading
o
Scan Line
Position
o
0
0
Reading Start Posi-
tion of Main Scan
o
0
0
Focus (MTF)
o
Reduction Ratio
(Moire)
o
0
0
0
0
*
Necessary Tools
1) Facsimile Test Chart R-21 (P/N 99992131)
2) Oscilloscope using the 1 volt scale:
950=3ms
830=10ms
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