1.4 Table of Image Quality Standards
Item Standard Measuring Method
Erase margin a) Leading edge 1
≤a≤7 mm
b) Trailing edge 1
≤b≤5 mm
c) Left side edge 1
≤c≤5 mm
d) Right side edge 1
≤d≤5 mm
Make one solid black copy and measure blank dimensions at four
edges. After the adjustment, make more than 10 copies and check
the variation.
2
< c+d ≤ 7 mm
Error in magnification In full size mode: Within
± 0.5%
In magnification mode: Within
±1.0%
Copy a scale and measure copy dimensions.
Registration Platen cover mode
a) Leading edge: 0
± 2 mm
b) Left and right edges: 0
± 2 mm
These values also valid on the 2-sided
copy.
Copy a test chart and compare the image position difference
between the original and the copy. After the adjustment, make more
than 10 copies and check the variation.
ADF/SADF mode
a) Leading edge:
--3 to +5 mm (ADF mode)
--4 to +6 mm (SADF mode)
b) Left and right edges: 0
± 5 mm
The difference of the side-to-side
registration between the front and
back side must be within 5 mm.
Skew Platen cover mode Copy a test chart and compare the image position difference
a)
± 1 mm/200 mm or less. between the original and the copy.
ADF/SADF mode
a)
± 1.5 mm/100 mm or less (on
smaller than A4/Letter paper).
b)
± 1 mm/100 mm or less (on
A4/Letter or larger paper).
1 July 1994 Table of Image Quality Standards
1-17
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