Epson Stylus Pro 4900/Epson Stylus Pro 4910 Revision A
ADJUSTMENT Media Feed Related Checks and Adjustments 368
Confidential
4.13.2 PF Encoder and Scale Check
EXECUTION MODE
Normal Mode
PROCEDURE
1. Remove the following parts in advance.
Front Cover (P. 142)
Left Cover (P. 137)
2. Install the following parts after removing the Left Cover.
Front Cover (P. 142)
3. Turn the printer ON.
4. Start the Service Program and select PF Encoder and Scale Check.
5. Select 30 Laps Rotations, and click [Run].
The PF Scale turns 30 times.
6. Check that the PF Scale is not contacting to the PF Encoder as seen from the
above.
7. Select Auto Check.
8. Click [Run].
The result will be displayed on the screen.
The result is OK: Go to Step 10
The result is NG: Go to Step 9
9. Since the PF Scale may be dirty, clean it with ethanol. After cleaning the PF Scale,
execute Step 7 and Step 8 to check again.
If the result is still NG after checking again, replace the PF Encoder (P. 183) or the
PF Scale (P. 184) and check again.
10. Click [Finish].
11. Turn the printer OFF to complete the adjustment.
Figure 4-78. Check position
PF Encoder
PF Scale
It is OK if the PF
Scale is contacted to
the while projection.
Check from
the above
Overhead view
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