Epson Stylus Pro 7400 Service Manual page 117

EPSON Stylus Pro 7400/7800/9400/9800
CR Head Alignment
This function allows you to check by a printed pattern if the CR head is tilted or not.
A mechanical adjustment is required if the CR head is judged as tilted.
Checking the CR Head for tilting
Overlapping of adjacent colors
indicates the CR head's tilting status.
A G A G A
Nozzle Row
Print mode: 360dpi, Bi-D, 240cps, VSD2, Small
CR Head Alignment
Figure 1-30.
Table 1-57. Nozzle Row and Ink Color
Nozzle Row
Stylus Pro 7800, Stylus Pro 9800
A Light Light Black
G Magenta
Product Description
Home to anti-home direction printing
discharging ink from every fouth nozzles
Anti-home to home direction printing
discharging ink from every fouth nozzles
Home to anti-home direction printing
discharging ink from the all 180 nozzles
Anti-home to home direction printing
discharging ink from the all 180 nozzles
G
Check Pattern
Ink Color
Stylus Pro 7400, Stylus Pro 9400
Matte Black
Yellow
PF Head Alignment
The alignment of the PF head can be adjusted by a printed pattern that consists of
waved Bi-D patterns.
Bi-D adjustment (reference row)
Bi-D adjustment VSD1 reference row can be adjusted.
PF Head Alignment adjustment
Observe the printed pattern and judge if the PF head is tilted or not. A mechanical
adjustment is required if the PF head is judged as tilted.
Checking the PF Head for tilting
The tilting status can be judged
by these gaps.
Print mode: 360dpi, Bi-D, 320cps, VSD1, Small
Figure 1-31.
Control Panel
Guide line for the check point
PF Head Alignment
Check Pattern
Revision B
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