InfoPrint 4247 Z03 Maintenance Information page 160

Table 20. Print quality tests and actions (fanfold) (continued)
Line Description
4 Printhead wire test.
The 18-wire printhead print wires are numbered 01A - 09A
and 01B - 09B (see Figure 16).
The wire numbers are printed under each group. Look for
light or missing dots. The 18-wire printhead xxB line
segments (see Figure 16) should be slightly lower than the
xxA line segments.
5 Paper feed test. Prints three lines of alternating line
segments and spaces. The top and bottom lines are
printed first. The middle line is printed after line 12 prints
and the paper feeds back to line 5. The middle line should
be centered between the first and third lines.
6 Bidirectional printing test. Prints four lines. Each H should
align with the H above or below.
7 Bidirectional printing test. Prints four lines. Each vertical
line should align with the vertical line above or below.
8 The first line is 10 CPI draft mode, the second line is 17.1
CPI draft mode, and the third line is 10 CPI NLQ mode.
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).
Action, if failure
Print the T&D14 fanfold print test after completing each of
the following steps:
1. Check the printhead cable connections. Repair as
needed.
2. Install a new printhead. See Printhead.
3. Install a new Engine board (see Engine board).
4. Install new printhead cable.
5. Run T&D in automatic mode to verify correct printer
operation (see "Running the test and diagnostic (T&D)
programs" on page 88).
See Main paper drive check and adjustment.
1. See Bidirectional Printing.
2. See Printhead drive service check.
1. See Bidirectional Printing.
2. See Printhead drive service check.
See Printhead drive service check.
1. Install a new printhead. See Printhead.
2. Install a new Engine board (see Engine board).
3. Install new printhead cables.
Chapter 5. Removals, service checks and adjustments
160