Platen Gap Adjustment; Table 4-2. Gap And Adjustment Direction - Epson STYLUS PRO XL 4004677 Service Manual

Adjustments

4.1.7 Platen Gap Adjustment

This adjustment is required when the carriage unit is replaced or removed from the printer
mechanism. Adjust the distance between the printhead nose and the paper surface to 1.1 mm.
1. Attach a thickness gauge (commercially available) to the left side adjustment position on the
paper guide plate, as shown in the figure below, so that one side hooks the paper feed pinch
roller unit.
2. Move the carriage unit manually onto the thickness gauge.

Table 4-2. Gap and Adjustment Direction

Gap between Head Nose and Gauge Surface
Narrow
Spread
3. Rotate the parallelism adjustment bushing, attached to the left and right ends of the carriage
guide shaft, when the black and color printheads contact the thickness gauge.
4. After attaching the printheads to the gauge surface, verify that the gap between the carriage
roller and the front frame is less than 0.04 mm. (See Figure 4-16.)
5. Attach the 1.1 mm thickness gauge to the right side adjustment position on the paper guide
plate, as shown below, so that one side hooks the paper feed pinch roller unit.
Note: When checking the gap between the carriage roller and the front frame, use the thickness
gauge or the paper guide plate. If the gap is correct the gauge cannot be installed into the
gap. If the gap is incorrect, the gauge can be inserted in the gap.
Left Adjustment Position
Thickness Gauge
Front Frame
Front
4-16
Attach the thickness gauge
under the PF pinch roller unit.
Eject Frame
PF Pinch Roller
Unit
Tension Roller
Thickness Gauge
Paper Guide
Figure 4-18. Adjusting the Platen Gap
Left Bushing
CW
CCW
Paper Guide Plate
Right Adjustment Position
Thickness Gauge
Attachment Point
Platen
Stylus Pro XL
Right Bushing
CCW
CW
Bushing
Pump Unit
Rev. A