
Chapter 4 DIAGNOSTICS
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
•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.
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