Ricoh Aficio IS420 Service Manual page 100

Image scanner
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APPENDIX B. OPTICAL ADJUSTMENT (ELECTRICAL)
24. Make sure that the 1st carriage is at the white chart position. Then press
the Enter key.
<<<< AGC=27 >>>>
<<<< Relative white level (W0) >>>>
Ajust VR1 : [X] == 218 +/- 3
**** Image Data (#3584) **** [ Exit : '!' key ]
002,002,222,218 (220,216 <+>004) [218]
25. Adjust VR1 on the SBU until the value of X is within the required range.
(In the example screen above, the value on the bottom line below the X
must be 218 +/- 3.) Then input !.
<<<<<< EXIT >>>>>>
[ Finish white level (relative) ajustment!! ]
[ Finish All Ajustment!!]
The adjustment procedure has finished. Switch off the scanner, remove the
VIU, and reassemble the machine.
Ave-(O:219,E:216 <+>004) [217]
B-8
October 9th, 1995
[X]

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