IBM 4247, Maintenance Information

Page: 341 / 567

Table 49. Print Quality Tests and Actions (Fanfold) (continued)
Line Description Action, if failure
10 Printhead drive test. Prints 19 lines. The
left margin should be even. See “Printhead Drive Service Check” on
page 333.
11 Print wire test. Look for light or missing
dots, or ink smearing. 1. Install a new printhead. See
“Printhead” on page 356.
2. Install a new logic board.
For Model A00, see page “Logic Board
- Model A00” on page 370. For Models
001 and 002, see page “Logic Board -
Models 001 and 002” on page 378. Or
“Logic Board - Model 003” on page
366.
3. Install new printhead cables.
12 Continuous straight line. 1. See “Main Paper Drive Check and
Adjustment” on page 301.
2. See “Printhead Drive Service Check”
on page 333.
13 See Line 5 above.
14 Skew test in draft mode. The line should
print parallel to the edge of paper. See “Main Paper Drive Check and
Adjustment” on page 301.
Chapter 5. Removals and Adjustments
341