Checking The Platen Gap - Epson Stylus COLOR 900 Service Manual

EPSON Stylus COLOR 900/900N
15. Remove the thickness gauge and place it on the far-left end of the
platen (80th-column position). Then adjust the left parallelism
adjustment bushing in the same way as you did the right one.

5.3.2 Checking the Platen Gap

After adjusting the platen gap, follow these steps to make sure it's set
correctly:
T
When you're checking the adjustment, make sure the
C A U T I O N
PG lever is set forward (narrower gap).
T
When you're repositioning the carriage, move the
PG lever to the rear to increase the platen gap and
prevent damage to the printhead.
1. Place the thickness gauge on the right end of the platen.
2. Move the blue PG lever to the rear to raise the carriage.
3. By pulling on the timing belt, move the carriage over the thickness
gauge.
4. Move the PG lever forward to narrow the platen gap.
5. By pulling on the timing belt, slide the carriage back and forth over
the thickness gauge and make sure the thickness gauge does not
move.
6. Rotate the right parallelism adjustment bushing upward one notch
and then make sure that the thickness gauge moves.
7. Return the right parallelism adjustment bushing to the previous
position by turning it downward one notch.
8. If the printhead fails to come in contact with the thickness gauge in
step 6, repeat the PG adjustment for the left bushing.
9. When the adjustment is successful, tighten the screws on both
bushings. While turning the screws, hold the bushings in place with
your hand so they don't move.
10. Remove the thickness gauge.
C H E C K
Check to make sure the linear scale (timing strip) is not
P O I N T
dislocated from the sensor slot on the back of the
carriage.
11. Remove the partially used or empty ink cartridges.
12. Move the carriage to home position.
13. Install the upper case.
Chapter 5 Adjustments
152