Specifications

9.1 LIGHT INTENSITY ADJUSTMENT
When: Every Call
Purpose: To maintain the correct light intensity
Adjustment
Standard:
Level 2 of the gray scale on the OS-A3 chart
should be just visible on the copy when the 4th
manual image density level is selected.
Measure: SP Mode #48
How: Changes the ac drive board output voltage.
1. Turn off the main switch.
2. Clean the following parts:
Item No. Section Method
(1) Optics (mirrors, lens, reflectors,
shield glass, exposure glass)
Damp cotton, silicine
cloth, and blower
brush
(2) ID sensor Blower brush
(3) Corona wires (charge, transfer,
and separation) and casing.
Alcohol or water
(4) QL, PTL, Erase Lamp Dry Cloth
3. Set the OS-A3 chart and make a full size copy at manual image density
level #4 (center).
NOTE: Make sure that the data in SP mode #37 is set to "0" (standard
value).
4. Confirm that level 2 of the gray scale is just visible on the copy. If the im-
age density is not correct, proceed to the following steps.
5. Enter the lamp voltage setting mode using the numeral keys (SP mode
#48).
6. Change the data with the numeral keys as follows:
If the image density is too dark: Increase the data number
If the image density is too light: Decrease the data number
7. Confirm that the image density is within the adjustment standard.
8. Perform the ADS adjustment. (See page 5-96.)
1 December 1990
5-91