HP 5000n manual Top Margin Adjustment, 32Removing and Replacing Parts

Top Margin Adjustment

When the terminal PCA is replaced in the field, the top margin needs to be re-adjusted. Also, if the top margin of test prints made after laser/scanner unit replacement is not 2.0 mm, this adjustment is necessary. The adjustment procedures are shown below.

1After setting the VR401 on the terminal PCA to the center position (+/-0), set A4-sized paper in the tray. Press the test print switch to make several test prints.

2Measure the length from the leading edge to the print pattern (“a” in Figure 6-24). Measure all the test prints and calculate the average.

3Adjust VR401 so that the calculated value in step 2 becomes 2.0 mm.

The pattern image shifts in the “+” direction in Figure 6-25 if VR401 is turned clockwise, and in the “-” direction, counterclockwise. Turning the VR401 one scale shifts the pattern about 0.8 mm.

For instance, if the average value calculated in step 2 is 2.8 mm, the difference is 0.8 mm. Therefore, turn VR401 clockwise for one scale. (See Figure 6-25.)

4Make several test prints again, and perform step 2. Check that the top margin is 2.0 mm. If the value is incorrect, repeat steps 1 through 4.

Figure 6-24Adjusting the Top Margin

6-32Removing and Replacing Parts EN