Ricoh FW830, Руководство по обслуживанию

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10.1 LIGHT SENSOR ADJUSTMENT
When:
1. Every Call
2. When replacing the following part
•
Exposure lamp
•
Light sensor
•
Drum
•
RAM on the main board
Purpose: To maintain the correct light intensity.
Adjustment
Standard:
Level 2 (10%) of the 9 step gray scale on the OS-
A1 chart should be slightly visible when the 7th
manual image density level is selected.
Perform: Turn VR102 on the main board.
How: Change the light sensor voltage.
1. Turn off the main switch.
2. Clean the following parts:
Item No. Section Method
(1)
Optics (Exposure glass, fiber
optics array) Damp cotton and dry
soft cloth
(2)
ID sensor Dry cloth or blower
brush
(3)
Corona wires (charge, transfer
and separation) and casing. Dry cloth
(4)
QL, PTL Dry cloth or blower
brush
3. Remove the middle right cover.
4. Make several copies at manual image density level 7 with OS-A1 chart.
5. Confirm that level 2 (10%) of the 9 step gray scale is slightly visible on the
copy. If the copy image density is not correct, proceed with the following
step.
6. Turn VR102 on the main board clockwise or counterclockwise.
If the image density is too dark: Turn VR102 clockwise.
If the image density is too light: Turn VR102 counterclockwise.
7. Confirm that image density is within the adjustment standard.
COPY QUALITY ADJUSTMENT 31 December 1992
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