IBM 4247-V03, Maintenance Information

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Note: Now that this adjustment has been made, consider marking the gap full-open position for future reference
or if the wheel needs to be removed again.
- or -
If the gap is not acceptable, the needles are worn. Replace the printhead, and return to Power On Check.
Bidirectional Printing
This procedure uses T&D10 and T&D12 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&D12 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 Table 24.
Adjustment
1. Scroll to T&D10
2. Run the bidirectional printing test and make adjustments, as needed (see “T&D10—Bidirectional adjustment
test” on page 112).
3. Scroll to T&D12
4. Run the Fanfold Form Printout test, and check vertical alignment on line 7 of the printout. For more
information, see Table 24 (see T&D12—Fanfold form printout test).
5. Repeat the adjustment steps until you have obtained the best alignment of vertical lines on the T&D12
printout.
Chapter 5. Removals, service checks and adjustments
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