Adj 4.1.7 Edge Present Sensor - Xerox 8830 Service Manual

ADJ 4.1.7 Edge Present Sensor

Purpose
The purpose of this procedure is to ensure that:
• the Actuator of the Lead Edge Present Sensor still extends above
the bottom surface of the Document Hold Down Guide when the
switch electrically goes from the deactuated to the actuated state
• the Actuator operates freely with the Document Hold Down Guide
installed
• the end of the Actuator always remains below the surface of the
Platen in the deactuated state.
Procedure
Check
1. Open the Top Cover.
2. Remove the Document Hold Down Guide.
3. Measure the height of the top of the Actuator above the surface of
the Platen. The dimension should be not less than
0.25 inches (6.4 mm).
• If the dimension is not correct, perform the adjustment below.
4. Examine the Actuator of the switch in the deactuated position. The
end of the Actuator should be below the surface of the Platen to
avoid catching the edge of the document as it moves from the rear
to the front of the Scanner.
• If the position of the Actuator is not correct, perform the adjustment.
5. Install the Guide.
6. Check that the Actuator operates with no friction against the hole in
the Guide.
• If the Actuator has friction with the Guide, perform the adjustment.
7. Press down gently on the center foam spring on the top of the Guide
to ensure that the Guide is firmly in position..
8. While performing step 7, press down the Actuator slowly, using the
piece of paper or a screwdriver,.
7356 SCANNER
9. Observe the position of the Switch Actuator at the moment that the
Drive Rolls start.
10. The highest portion of the Actuator should still be above the bottom
surface of the Guide. If not, perform the adjustment.
Adjust
1. Remove the Rear Panel (REP 4.1.2).
2. (Figure 1) Loosen the two retaining screws.
Figure 1. Edge Present Sensor - Bracket
4/97
4*45 ADJ 4.1.7