Printer Hardware Adjustments - Epson STYLUS Scan 2000 Service Manual

EPSON Stylus Scan 2500

5.2.1 Printer hardware adjustments

5.2.1.1 Parallelism Adjustment
When replacing the carriage assembly or removing it during printer mechanism
disassembly, perform the parallelism adjustment during re-assembling and set
the standard distance from the surface of the printhead to the paper surface.
Do not scratch the special coated surface of the PF roller
assembly or the ribbed surface of the front paper guide; B.
Be careful not to scratch or leave anything such as dirt on
the surface of the printhead. (Never use a rusty or dirty
thickness gauge. Also, do not push the thickness gauge
hard against the head.)
[RIGHT PARALLELISM ADJUSTMENT]
1. Install the "parallelism adjustment bushing" for right and left frame and set
them on the peaking of the upper frame side so that they match with "the
standard mark of parallelism adjustment bushing".
2. Make sure the PG lever is pulled forward (small gap position).
3. Move the carriage to the center and set the thickness gauge on the fixed
position of the front paper guide; B as shown in Figure 5-1 on the next
page.
4. Move the carriage so that the printhead overlaps the thickness gauge.
Put the thickness gauge on the flat side of a ribbed
section of the front paper guide; B.
To move the carriage, pull the timing belt with your hand.
5. Move the right parallelism adjustment bushing to the rear until the
thickness gauge moves with the carriage when you move the carriage
about 20 mm right and left (the gap will narrow).
Adjustment
6. From the point where the thickness gauge starts moving with the carriage,
move the gear of the right parallelism adjustment bushing one notch
toward you (the gap will widen)
7. With the PG lever pulled forward (gap is small), move the carriage right and
left to make sure that the thickness gauge does not move.
[LEFT PARALLELISM ADJUSTMENT]
8. Perform Steps 2 to 7 for the left parallelism adjustment bushing.
[CHECKING PARALLELISM]
9. Perform steps 1 to 4 again.
10. Make sure that the thickness gauge does not move right and left along
with the carriage when the carriage is moved about 20 mm.
11. Move the right parallelism adjustment bushing one notch to the rear (the
gap will narrow).Then check that the thickness gauge moves along with
the carriage. If the thickness gauge does not move, go back to Step 1 and
repeat the adjustment.
12. If the gap is adjusted correctly, move the right parallelism adjustment
bushing one notch toward you (the gap will widen).
[FIXING PARALLELISM ADJUSTMENT BUSHING]
13. Fix the right and left parallelism adjustment bushings with screws (CBS
3x6).
Printer Adjustment
Revision A
111