Ricoh A250 Service Manual page 184

SERVICE PROGRAM MODE
Mode No.
Class Class
1 and 2 3
IPU/SBU Test Pattern
4-417
Exposure Lamp ON
4-902
SBU Gain Adjustment
(EVEN)
1*
SBU Gain Adjustment
(ODD)
2*
4-904
SBU Gain Adjustment
(Adjusted EVEN)
3
SBU Gain Adjustment
(Adjusted ODD)
4
A250
Function
Prints test patterns from the IPU or SBU video data
outputs. (1 ~ 13: IPU, 14 ~ 16: SBU)
0. No Print
1. Vertical Line - 1 dot
2. Horizontal Line - 1 dot
3. Vertical Line - 2 dot
4. Horizontal Line - 2 dot
5. Alternating Dot Pattern
6. Grid Pattern - 1 dot
7. Vertical Bands
8. Grayscale - Horizontal
9. Grayscale - Vertical
10. Patch Pattern
11. Cross Pattern
12. Slant Pattern
13. Trimming Area
14. Vertical Line - 2 dot
15. Grid Pattern - 2 dot
16. 16-grayscale
Change to the copy mode display by pressing the
N
(Interrupt) key, then print the test pattern.
Turns on the exposure lamp.
To turn off the exposure lamp, select
"0".
Checks the difference value of the
black level for the EVEN channel
after adjusting the black level at
power-up.
Do not change the value.
However, after performing the
memory all clear (SP5-801), use it to
re-input the previous value.
Checks the difference value of the
black level for the ODD channel after
adjusting the black level at power-
up.
Do not change the value.
However, after performing the
memory all clear (SP5-801), use it to
re-input the previous value.
Checks the difference value of the
black level for the EVEN channel
after adjusting the black level at SBU
Auto Adjustment (SP4-908).
Do not change the value.
Checks the difference value of the
black level for the ODD channel after
adjusting the black level at SBU Auto
Adjustment (SP4-908).
Do not change the value.
4-16
Settings
0: No (Off)
1: Yes (On)
0 ~ 255
1/step
40
0 ~ 255
1/step
40
0 ~ 255
1/step
40
0 ~ 255
1/step
40
SM