Ricoh A172 Service Manual page 166

Page Item
Blank Margin
<1>
-13
Max Bk Level
Detection 1
Target
Max Bk Level
Detection 2
Target
AD-Vref Target
Voltage
AD-Vref
Coefficient
(Shading)
<1>
AD-Vref
-14
Coefficient (Data
Mode)
⇒
Copier AD-Vref
Coefficient
(Data Mode)
FPU
SM
Function
Adjusts the width of the margins
at the edges of the copy paper.
Main Scan Lead Edge:
Adjusts the margin at the right
edge of the copy paper.
Main Scan Trail Edge:
Adjusts the margin at the left
edge of the copy paper.
Sub Scan Lead Edge:
Adjusts the margin at the
leading edge of the copy paper.
Sub Scan Trail Edge:
Adjusts the margin at the
trailing edge of the copy paper.
Adjusts the black level target
(DA1) for the AGC.
Adjusts the black level target
(DA2) for the AGC.
Selects the AD-V target
REF
voltage to set the exposure
lamp voltage in the AGC.
Selects the AD-V coefficient
REF
to prevent the overflow of white
shading data.
Factory use only (Gray balance
adjustment)
Factory use only.
4-15
Rev. 4/14/97
Note
Adjustable range:
–5 ∼ 5 mm
Right edge:
–5 ∼ 5 mm
Left edge:
–5 ∼ 5 mm
Lead edge:
Trailing edge: –5 ∼ 5 mm
Default:8
Do not adjust in the field.
Default:4
(R-E, G-E, B-E, R-O, G-O, B-O)
Do not adjust in the field.
Default: Copier: 2.7
FPU: 2.7
Do not adjust in the field.
Default data: Copier: 110
SPU: 110
Do not adjust in the field.
Do not adjust in the field.
R-E = 66 G-E = 60 B-E = 65
R-O = 66 G-O = 60 B-O = 65
A172/A199