Instruction manual

3–35Troubleshooting
Diagnostic Printer Tests
A set of printer tests is included in the configuration menu structure for use
as diagnostic and maintenance tools. You can use these printer tests to check
the print quality and basic operation of the printer. In addition, you will use
some of these tests in various troubleshooting and adjustment procedures.
The diagnostic printer tests are summarized below:
♦ Shift Recycle A “sliding” alphanumeric pattern useful for identifying
missing or malformed characters, improper vertical alignment, or vertical
compression.
♦ All E’s A pattern of all uppercase letter E’s useful for identifying
missing characters, misplaced dots, smeared characters, improper
phasing, or light/dark character variations.
♦ E’s + TOF A pattern of all E’s repeated for ten lines and followed by a
form feed to the top of the next page. This test is useful for identifying
paper motion or paper feed problems.
♦ All H’s A pattern of all uppercase letter H’s useful for detecting missing
characters or dots, smeared characters, or improper phasing.
♦ Underline Only An underline pattern useful for identifying hammer
bank misalignment.
♦ All Black Prints all dot positions, creating a solid black band. Exercises
shuttle and hammer bank at maximum capacity.
♦ Shuttle Slow Verifies proper operation by exercising the shuttle and
ribbon mechanisms at low speed. You can also use this test to check
ribbon tracking and reversing.
♦ Shuttle Fast Verifies proper operation by exercising the shuttle and
ribbon mechanisms at high speed. You can also use this test to check
ribbon tracking and reversing.
♦ Shuttle Only This test runs only the shuttle mechanism, not the ribbon
mechanism.