Epson CX3800 Service Manual Page 139

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EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A
ADJUSTMENT Adjustment by Using Adjustment Program 139
5.2.9 Head Angular Adjustment
Adjustment procedure
1. Set Normal Paper A4/Letter on the Paper Support.
2. Select “Head angular adjustmen
t” in the Adjustment Program.
3. Click the [Print] button to print following two head angular check patterns.
Band pattern
Raster offset pattern
4. Check the printed patterns and select a pattern number that has the least
amo
unt of misalignment.
5. Click the [Input] button to write the adjustment value of checked items.
6. Print the check pattern again, and chec
k the adjustment result.
[Treatment procedure
for NG product]
1. Replace the Print Head with new one again.
2. Print the check pattern, and check the
adjustment result.
3. If the result is NG level, confirm the instal
lation condition of removed parts
during disassembly.
4. Perform Step 2 again.
Figure 5-3. Head Angular Adj
ustment Printing Pattern
OKpattern
NGpattern
OKpattern
NGpattern
Band pattern
Raster offset pattern
[Judging Standard]
The printed line should be straight line.
[Reference]
Shift length of Head Angular pattern is MAX
±50µm
[Judging Standard]
Spaces between the cyan lines and gray lines
should be uniformed.
[Reference: Standard value in manufactory]
±70µm
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