Epson Stylus Photo 950, Service Manual

Page: 39 / 191

EPSON Stylus PHOTO 950 Revision A
OPERATING PRINCIPLES Printer Mechanism 39
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Step 3 : Paper Return Sequence
7. Once a top paper is loaded to the printer internal, then the paper return sequence
will be performed to prevent double feeding after the 2
nd
papers.
8. At point A, when the "slow down nail" passes over a step, the hopper will be
returned to the stand-by position from the hopper-state. That because the "upling
shaft limitation lever" pulls down the "coupling shaft".
Figure 2-20. Silence Cam mechanism (5)
9. Also, "paper return lever" will suddenly be jumped out as well as the "slow down
nail" passes over a step (Point A or Point B). This timing is managed and
controlled by the "CAM gear" located on backside of the "Silence CAM". The
jumped out "paper return lever" is the same condition to Step 4.
10. After the Step 9 operation completes, once loaded paper will more be loaded and
ejected by the friction between PF roller and PF support rollers without ASF
operation.
Figure 2-21. Silence Cam mechanism (6)
C H E C K
P O I N T
„
But the stand-by position Step 8 says does not mean the initial
hopper-status which Step 1 shows. And this stand-by position
will be decided depending on the total thickness of the current
installed papers. (Figure 2-20 case, no paper or small quantity of
papers is (are) installed to the hopper.)
„
This means, if the total thickness of current installed papers is
very thick, slow-down nail will pass over the another step
different from "Point A" as shown in Figure 2-20. The Figure
2-21 shows the case when user installs 150 sheets of plain papers
on the hopper.
Hopper down
CCW
Point A
Hopper down
Point B
CCW