Bidirectional Printing; Afta Gap Check; Service Check - InfoPrint 4247 Z03 Maintenance Information

AFTA Gap Check

1. Set the menu configuration to Front AFTA = 0. This invokes the microcode to use the print head needle, motor,
and the internal logic to detect the thickness of the forms that are positioned against the platen.
2. Load 1-part paper into the printer and press the Form Feed key to move a full page above the carriage.
Remove the paper bail assembly. Advance the platen until the WHITE dot on the left end of the platen shaft is
aligned with the WHITE mark on the shaft bearing.
3. Record the AFTA Wheel number (it should be indicating near '1').
4. Move the print head carriage the AFTA position near the left end of the platen.
5. Tear off the forms at a perforation below the tractors, open the tractor doors, and remove the paper from the
tractor pins.
6. Rotate the AFTA Wheel closed to a very small gap. The paper should be pinched by the carriage and will NOT
slide when pulled backwards.
7. As you continue to pull on the paper, begin to rotate the Wheel in small increments to open the gap. Note the
Wheel position where you can begin to pull the paper backwards with a friction that remains constant as you
continue to open the gap. This gap is where the paper is released from the carriage assembly pinch and
begins to slide freely. This is 'Paper-Sliding Gap'.
8. Close the gap again and repeat this a few times until you agree on the Wheel position number where paper
beings to slide with constant friction. The constant friction is from the Lower Mylar assembly. Repeat this a few
times until you agree on the Wheel position number where paper begins to slide with constant friction.
9. If the AFTA setup used by the printer (recorded above) is less than the 'Paper-Sliding Gap + 0.5' then the
print head needles may be worn down and the print head should be replaced.

Bidirectional Printing

This procedure uses T&D12 and T&D14 to perform bidirectional adjustment from the operator panel.
Run the T&D program in single test mode.
v See Running the test and diagnostic (T&D) programs.

Service check

Use T&D14 to print NLQ characters. If the vertical bars on the characters are not aligned, perform the adjustment.
As an aid in evaluating the print, see Print quality service checks and Figure 16.
Chapter 5. Removals, service checks and adjustments
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