IBM 4247 Maintenance Information page 290

3. With loose forms, back fold the beginning of the forms along a left-to-right perforation.
4. Mount these forms onto the tractor pins. The printer now has a combined paper thickness of approximately 0.2
mm (0.008 in.).
5. Perform a Load operation on this double-thickness of forms. After performing a Load, the wheel should
repeatedly go to a numeral that is 1 greater (± 0.25 on the wheel) than the number 'A' you recorded at the end
of step 5 on page 289 of Verify AFTA operation, using single-part forms. Based on the results you get:
v If the number is not increasing, perform T&D12, then return to Verify AFTA calibration using single-part
forms.
- or -
v If the number is increasing, remove the wheel and align the pointer to '2.' Return to Verify AFTA
calibration using single-part forms.
6. Run T&D12 If you need additional information about running this T&D, see "T&D12 - AFTA Calibrate Test" on
page 171 (Model A00) or "T&D12 - AFTA Calibrate Test" on page 210 (Models 001, 002, and 003), and return
here to complete this procedure. Set the T&D12 value to '0' and STORE.
7. After running T&D12, go to Verify AFTA calibration using single-part forms.
Verify AFTA calibration, using single-part forms
1. Set the operator panel menu item FIXED=1.
2. Load single-part, 20 lb (80 g/m
3. If the wheel position for FIXED=1 is different than the number you noted at 'A' during the procedure entitled
Verify AFTA operation, using single-part forms, run T&D12 Set the adjustment value to '0,' and STORE.
4. To verify that the wheel position is now correct, repeat the Load operation using single-part forms, with the
settings AFTA=0 and FIXED=1. The wheel must go to the same position.
Verify printhead needles
To verify that all the printhead needles are functioning, run T&D14 The use of the 'Printhead Wire Test' pattern is
shown in Figure 93 on page 342, and is described in Line 4 and Line 11 of Table 49 on page 339.
2
) forms into the printer, using the Load key. Note the wheel position.
Chapter 5. Removals and Adjustments
290