IBM V03 Maintenance Information page 172

Table 23. Print quality tests and actions (fanfold) (continued)
Line Description
9 Printhead wire shifter test. Prints two lines.
To print in NLQ mode, one set of nine
wires (1B to 9B) is shifted up, by a
solenoid, relative to the fixed set of nine
wires (1A to 9A). In this test, the first line
prints a less than symbol (NLQ mode),
tilde (draft mode), and a greater than
symbol (NLQ mode). The second line
prints a less than symbol (draft mode), tilde
(NLQ mode), and a greater than symbol
(draft mode).
10 Printhead drive test. Prints 19 lines. The
left margin should be even.
11 Print wire test. Look for light or missing
dots, or ink smearing.
12 Continuous straight line.
13 See Line 5 above.
14 Skew test in draft mode. The line should
print parallel to the edge of paper.
Action, if failure
1. Install a new printhead. See Printhead.
2. Install a new logic board (see Logic
board).
3. Install new printhead cables.
See Printhead drive service check.
1. Install a new printhead. See Printhead.
2. Install a new logic board (see Logic
board).
3. Install new printhead cables.
1. See Main paper drive check and
adjustment.
2. See Printhead drive service check.
See Main paper drive check and
adjustment.
Chapter 5. Removals, service checks and adjustments
172