IBM 4247 Maintenance Information page 223

Important
This setting should be changed only if instructed by Plant Engineering.
The following message will display:
T&D20 NLQ Printhead Mode Test RUN TEST? YES END NO
Display:
T&D20 NLQ Printhead Mode Test NLQ 18 WIRE YES NO
1. In this mode, the printhead will print NLQ by using 18 wires. This is done by shifting one set of 9 wires (1B to
9B) up relative to the fixed set of wires (1A to 9A), and making one pass per line.
2. To select this mode, press the Line Feed key, the display will advance to the next test.
3. To select the next printing mode, press the Start key.
The following message will display:
T&D20 NLQ Printhead Mode Test NLQ 9 BIDIR. YES NO
4. In this mode, the printhead will print NLQ by using 9 wires and two passes per line in bidirectional mode.
5. To select this mode, press the Line Feed key, the display will advance to the next test.
6. To select the next printing mode, press the Start key.
The following message will display:
T&D20 NLQ Printhead Mode Test NLQ 9 UNIDIR. YES NO
7. In this mode, the printhead will print NLQ by using 9 wires and two passes per line in one direction.
8. To select this mode, press the Line Feed key, the display will advance to the next test.
9. If an error message is displayed, go to "T&D Error Messages and Actions – Models 001, 002, and 003" on
page 231.
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Chapter 2. Diagnostics