IBM V03 Maintenance Information page 159

After the print quality samples indicate that the printer now has achieved the proper darkness change, you must
verify a correct gap between the:
v Printhead and the platen
v Carriage and the platen
To verify the correct gaps, follow these steps.
1. Set the AFTA menu item to AFTA=0.
2. Load a single sheet of 20 lb (80 g/m
3. Remove the forms from the forms path.
4. Open the top cover and remove the ribbon.
Checking printhead-to-platen gap
1. Rotate the platen to locate a white dot on the left end of the platen shaft.
If you can locate the white dot, you will use a 0.25 mm (0.010 in.) feeler gauge in the next step.
- or -
If you cannot locate the white dot, you will use a 0.3 mm (0.012 in.) feeler gauge in the next step.
2. Check the gap between the printhead needles and the platen, using one of the feeler gauges.
3. If the resistance is slight, proceed to Checking carriage casting-to-platen gap. If the resistance is excessive,
the gap is too small because the needles are worn. Replace the printhead, and return to "Power On Check" on
page 155.
Checking carriage casting-to-platen gap
1. If installed, remove the front tractor.
2. Slide a single sheet of 20 lb (80 g/m
the platen. The paper should slide through the gap with the slightest resistance.
If the gap is acceptable, adjust the wheel position to get the pointer to point to 1 on the wheel.
2
) paper into the print area.
2
) paper through the gap between the carriage casting and the surface of
Chapter 5. Removals, service checks and adjustments
159