Specifications

3–26 Troubleshooting
c. If the display reads “Diagnostic Tests in Progress” and 68010
LED has been on for 20 seconds or more but is not blinking, it
means the 64180 cannot communicate with the 8032 on the
Mech Driver board. Turn off the printer, reseat the cable in J2 of
the CCB and on the Mech Driver board. Check the 8032 on the
Mech Driver, its PROM, and its clock jumper (E1–E2) for
correct insertion, bent pins, etc. Reseat the jumper and socketed
parts. If the problem persists, replace the Mech Driver’s PROM
and the CCB/Mech. Driver cable assembly W1.
Diagnostic Self–Tests
Run diagnostic self–tests to check the print quality and operation of the
printer. The self–tests are listed below.
NOTE: Under the description of each diagnostic test is a list of items that
may require field replacement or adjustment if the test produces a
bad print pattern. Items are listed in the order they should be
checked: simplest items first, moving to more complex components.
• ASCII Swirl A sliding alphanumeric pattern useful for identifying
missing or malformed characters, improper vertical alignment, or
vertical compression.
Hammer bank cover
Hammer spring
Shuttle frame assembly
• All Es A pattern of all uppercase letter Es useful for identifying
missing characters, misplaced dots, smeared characters, improper
phasing, or light/dark character variations.
Ribbon
Hammer bank cover
MPU sensor
Hammer spring
Hammer coil (shuttle frame assembly)
Splined shaft skew adjustment