IBM V03 Maintenance Information page 108

If the AFTA mechanism is malfunctioning or not repeatable, perform the "Standard AFTA service check and
adjustment" on page 152.
Display:
Calibrate the microcode
1. Place a single sheet of 20 lb (80 g/m²) paper in the rear tractor (see Paper path nomenclature).
2. Initiate T&D08 (see T&D08—AFTA calibrate test).
3. Move to (or keep) the value 0.
4. Exit with STORE=YES. The requirement for calibrating is described in "Standard AFTA service check and
adjustment" on page 152.
Adjust the print gap
1. Adjust the print gap in 0.25 mm (0.001 in.) increments to achieve acceptable print darkness.
2. Initiate T&D08 (see "Running T&D08" on page 109).
3. Use STORE=NO.
4. Move the value to +x to increase the gap and -x to decrease the gap. This adjustment is described in
"Standard AFTA service check and adjustment" on page 152.
5. After adjusting the gap to optimize the print quality, exit with STORE=YES.
6. Verify the gap between the printhead needles and the platen, as described in Standard AFTA service check
and adjustment.
7. Verify the gap between the carriage casting and the platen, as described in Standard AFTA service check and
adjustment.
055 AFTA errors: If your printer is getting a 055 AFTA ERROR message that is caused by a bad #5B printhead
needle, the printer will display these messages:
v During normal operation: With the AFTA=0 mode, you perform a paper load operation, but get a 055 AFTA
ERROR message.
T&D08 T&D AFTA CALIBRATE TEST YES NO END
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Chapter 2. Diagnostics