Epson 900N, Service Manual

Page: 140 / 201

EPSON Stylus COLOR 900/900N Chapter 5 Adjustments
137
5.2.5.3 Choosing the Best Test Pattern
To choose the best test pattern, look for these traits:
1. A solid pattern with no white vertical lines or bands is the best:
Figure 5-26. The Perfect Test Pattern
2. If all the patterns have bands but the bands are less visible in some
of the patterns, choose the pattern with the faintest bands. In the
figure below, you would choose Example 5.
Figure 5-27. Faint Bands Are Better Than Obvious Ones
3. If all the patterns have obvious bands, choose the one with the
narrowest bands among those patterns that are symmetrical and in
which the bands on the right and left are the same width. See the
figure below.
Table 5-8. Symmetrical Patterns Are Okay
E x a m p l e 1 E x a m p l e 2 E x a m p l e 3 E x a m p l e 4 E x a m p l e 5
I n c o r r e c t :
B a n d s f o r m a s y m m e t r i c a l p a t t e r n .
C o r r e c t :
B a n d s f o r m s y m m e t r i c a l p a t t e r n .