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Chapter 4 DIAGNOSTICS
290
Printer Tests
These tests are used to check the print quality and operation of the
printer.
NOTE: Your authorized service representative will typically run the
tests. They are described in more detail in the
Maintenance
Manual
.
• Shift Recycle. A sliding alphanumeric pattern which identifies
missing or malformed characters, improper vertical alignment,
or vertical compression.
• All E's. A pattern of all uppercase E's which identifies missing
characters, misplaced dots, smeared characters, improper
phasing problems, or light/dark character variations.
• E's + TOF. A pattern of all E's followed by a form feed to the
next page top-of-form, which identifies paper motion or feeding
problems.
• All H's. A pattern of all uppercase H's used to detect missing
characters, misplaced dots, smeared characters, or improper
phasing.
• All Underlines. An underline pattern useful for identifying
hammer bank misalignment.
• All Black. A condition where all dot positions are printed,
creating a solid black band.
• Shuttle Slow. Verifies proper operation by exercising shuttle
and ribbon motion at low speed.
• Shuttle Fast. Verifies proper operation by exercising shuttle
and ribbon motion at fast speed.
• Shuttle Only. Exercises only the shuttle at fast speed.
• Phase Printer. Checks for wavy print. The initial phase value is
set in the factory. Run the test and check the quality. (The
phase value prints on the left margin.) If the print looks too
wavy, change the Phase Value parameter while the test is
running. While the phase printer test runs, press the DOWN
key. To change the value, press the PREV or NEXT key until
the desired value displays and then press ENTER.