Axiohm 7156 Spezifikationen Seite 59

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7156 Owner’s Guide Diagnostics
October 1995 51
1. Remove the front cover from the hinge arm assembly.
This will make it easier to perform the adjustment.
a. Open the hinge arm assembly.
b. Remove the screws holding the front cover to the hinge arm assembly.
c. Unsnap the front cover from the hinge arm assembly.
d. Close the hinge arm assembly to finish the adjustment.
2. Insert a blank slip into the slip station from the left side so that it covers the
MICR read head, but does not come into contact with the feed rolls.
Be sure that the slip covers the MICR read head and stays in position.
3. Set both potentiometers (on the PC board) to mid range using a screwdriver.
4. Adjust the lower potentiometer (R9) on the PC board either direction.
The green LED should be on before you adjust the potentiometer.
5. Press the Paper Feed button on the PC board to take a noise sample.
Repeat steps 3 and 4 until the lowest number of characters is printed. You
may need to adjust the potentiometer both directions to get the best setting.
If OK is printed on the receipt, go to number 7.
6. Adjust the upper potentiometer (R8) on the PC board either direction.
The green LED should be on before you adjust the potentiometer.
7. Press the Paper Feed button on the PC board to take a noise sample.
Repeat steps 5 and 6 until the lowest number of characters is printed. Adjust
the potentiometer both directions to get the best setting. When OK is printed,
the noise is low enough for the MICR to operate successfully.
8. Press the On Line button to take the printer off-line.
9. Set the DIP switches back to the settings for normal operation (on-line mode).
See “Switch Settings” in the “Communication” chapter for the settings.
10. Reattach the front cover.
11. Close the front cover and press the On Line button to put the printer on-line.
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