Light Intensity Adjustment - Ricoh A151 Field Service Manual

8.1 LIGHT INTENSITY ADJUSTMENT

When:
Purpose:
Adjustment
Standard:
How to Adjust:
How it works:
1. Turn off the main switch.
2. Clean the following parts:
Item No.
Optics (mirrors, lens, reflectors,
(1) shield glass, exposure glass)
(2) ID sensor
Corona wires (charge, transfer,
(3)
and separation) and casings.
(4) QL, Erase Lamp
3. Clear the V correction by using SP95.
L
NOTE: Always perform SP95 after cleaning the optics components.
4. Place the OS-A4 test chart on the exposure glass and make a full size
copy at manual image density level 4 (center).
NOTE: Make sure that the value of SP37 is set to "0" (standard value).
5. Confirm that level 2 (E0.2) of the gray scale is slightly visible on the copy.
If the image density is not correct, proceed to the following steps.
6. Enter the lamp voltage setting mode using the numeral keys (SP48).
7. Change the data with the numeral keys as follows:
If the image density is too dark:
If the image density is too light:
8. Confirm that the image density is within the adjustment standard.
9. Perform the ADS adjustment. (See ADS Adjustment.)
A151/A152
1. Every Call
2. When replacing the following parts
Exposure Lamp
Main Board
Auto Image Density Sensor
To maintain the correct light intensity.
Level 2 (E0.2) of the gray scale on the OS-A4
chart should be slightly visible on the copy when
the 4th manual image density level is selected.
SP48
Changes the ac drive board output voltage.
Section
5-74
AC Drive Board
Drum
Method
Damp cotton, silicone
cloth, and blower
brush
Blower brush
Casings: Water
Wires: Dry Cloth
Dry cloth
Increase the data number
Decrease the data number
FSM