Service manual

Epson Stylus Photo PX650/TX650/TX659/PX660/PX660 Premium/Artisan 635 Revision C
ADJUSTMENT PG Adjustment 121
Confidential
 Adjustment procedure
 Specified PG value: 1.2 ± 0.1 mm
1. Install new ink cartridges in the carriage.
2. Remove the Cable Holder Frame. (See Figure 4-87.)
3. Check that the APG Unit and the carriage are in the PG-position. (See Figure 5-8.)
4. Move the carriage to the center of the platen, and place 1.15 mm thickness gauge
on the left aligning its left edge with the second rib of the Front Paper Guide. And
place another 1.15 mm thickness gauge on the right aligning its right edge with the
rightmost rib of the Front Paper Guide. (See Figure 5-9.)
NOTE: The thickness gauge must not be set over the leftmost rib on the Front
Paper Guide.
5. Pull the Timing Belt to move the carriage to the left end.
6. If the carriage comes in contact with the gauge, adjust the Left Parallelism Bush to
raise the carriage to a position where the Printhead does not come in contact with
gauge.
7. Pull the Timing Belt to move the carriage to the right end.
8. If the carriage comes in contact with the gauge, adjust the Right Parallelism Bush
to raise the carriage to a position where the Printhead does not come in contact
with gauge.
9. Move the carriage to the middle area of the platen, and place 1.3 mm thickness
gauges at the left and right ends of the platen.
10. Pull the Timing Belt to move the carriage to the left end.
11. If the carriage does not come in contact with the gauge, make the adjustment
again.
12. Pull the Timing Belt to move the carriage to the right end.
13. If the carriage does not come in contact with the gauge, make the adjustment
again.
14. Mark the indicated graduation position of the right and left Parallelism Bush, and
tighten the screws.
(Screw tightening torque: 0.8±0.1 N•m)
Figure 5-9. PG Adjustment (1)
Figure 5-10. PG Adjustment (2)
C A U T I O N
The Printhead must come in contact with the 1.3 mm thickness
gauges but must not come in contact with the 1.15 mm thickness
gauges.
Gauge (1.15 or 1.3mm)
Pull the belt to move the carriage
Left side Right side
CR
Guide
Shaft
UP
CR
Guide
Shaft
DOWN
CR
Guide
Shaft
UP
CR
Guide
Shaft
DOWN
CR Guide Shaft