RICOH IS420
Manual de Servicio

October 9th, 1995

APPENDIX B. OPTICAL ADJUSTMENT (ELECTRICAL)

18. Move the 1st carriage to the white chart position. Then press the Enter key.
<<<< AGC=27 >>>> <<<< Absolute white level (W1) >>>> Ajust VR3 : <W0X> == 0 +/- 3 **** Image Data (#3684) **** [ Exit : �!� key ] 003,003, 085,085 (082,082 <+>000) [082] [X] Ave-(O:082,E:082 <+>000) [082]

19. Adjust VR3 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 0 +/- 3.) Then input !.
<<<<<< EXIT >>>>>> [ Finish white odd even ajustment!! ] [ Next : Hit Enter Key !! ]

20. Press the Enter key. This ends the White Level Difference Adjustment and starts the Absolute White Level Adjustment.
************************************** **** AJUST WHITE LEVEL (ABSOLUTE) **** ************************************** ---- Put the White Chart on the Lamp position !! ---- << Then , Hit Enter Key >>

21. Make sure that the 1st carriage is at the white chart position. Then press the Enter key.
<<<< AGC=27 >>>> <<<< Absolute white level (W1) >>>> Ajust VR4 : [X] == 220 +0 /-10 **** Image Data (#3584) **** [ Exit : �!� key ] 002,002, 219,217 (217,215 <+>002) [216] [X] Ave-(O:217,E:214 <+>002) [215]

22. Adjust VR4 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 220 +0 / - 10.) Then input !.
<<<<<< EXIT >>>>>> [ Finish white level (absolute) ajustment!! ] [ Next : Hit Enter Key !! ]

23. Press the Enter key. This ends the Absolute White Level Adjustment and starts the Relative White Level Adjustment.
************************************** **** AJUST WHITE LEVEL (RELATIVE) **** ************************************** ---- Put the White Chart on the Lamp position !! ---<< Then , Hit Enter Key >>

B-7

Appendix B