Ricoh Aficio IS420 Service Manual page 88

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October 9th, 1995
A.3.2. White Level Adjustment
1. Move the carriage to where the white part of the resolution chart is in
position for reading.
2. Connect the probes of the oscilloscope as shown above.
CN1: V
CN2: T
3. Turn the adjustment knobs on the SBU to where the CCD detects the
white level (the white level trace must be flat) and the output is greatest.
APPENDIX A. OPTICAL ADJUSTMENT (MECHANICAL)
Time: 0.1 ms
V: 1 V
G404X502.wmf
A-3
Adjustment
G404X501.wmf
G404X508.wmf

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