User`s manual

6–6 Routine Service and Diagnostics
Printer Self–Tests
Run the printer self–tests to check the print quality and operation of your
printer. The self–tests include:
• ASCII Swirl – A sliding alphanumeric pattern that identifies missing or
malformed characters, improper vertical alignment, or vertical
compression.
• All Es – A pattern of all uppercase letter Es that identifies missing
characters, misplaced dots, smeared characters, improper phasing
problems, or light/dark character variations.
• Es plus TOF – A pattern of all Es followed by a form feed to the next
page top of form, that identifies paper motion or feeding problems.
• All Hs – A pattern of all uppercase letter Hs used to detect missing
characters, misplaced dots, smeared characters, or improper phasing.
• All Underlined – 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 high speed.
• Phasing – A timing parameter used by service personnel to adjust
vertical alignment of dots in character printing.
• Test Width – Permits you to run tests at all available print widths.
NOTE: Printer self–tests are also charted on the Configuration Diagram in
Chapter 4, Printer Configuration.