Table of Contents
Advertisement
Chapter 4. Maintenance
Corrective Maintenance
Standby pan
Ground wire
4 - 8
4. Slide the drip pan (0193687) under the printhead (see Figure 4.6);
center it under the print array.
Warning: Flammable Vapor
Never leave the 7122 unattended while powered up in standby or any
other state.
Figure 4.6
Standby pan installed under 7122 printhead
Wiping and Swabbing
Cleaning the 7122 printhead consists of wiping and swabbing. Use these
procedures under the following circumstances:
•
Routine cleaning - check the printhead and wipe it off to prevent ink
buildup
•
Incident recovery - inspect the printhead and clean off any dried ink if
a print quality defect occurs. Defects include: charge shorts,
streakers, crooked jets, and general raggedness (loss of print
'window').
•
Dried ink is visible on the eyelid or lower portion of the printhead.
Accumulated dried ink will cause print defects. Cleaning off dried ink
should always be the first step in any effort to correct a print quality
problem.
Routine Cleaning
During normal operation, ink will collect on the lower surfaces of the
printhead from mist or spray produced by the curtain of drops falling to the
substrate. The clean cycles run during shutdown should remove this ink
before it becomes a problem. Inspect the printhead periodically to see if
the buildup is present. If print quality problems appear, use the following
procedure to clean the 7122 printhead during normal operation:
1. Shut the system down to perform a printhead clean.
2. Run test prints and see if print quality has been restored. If it has not,
run a second printhead cleaning cycle. If the problem persists,
continue with the remaining steps.
3. Install the catch pan (see "Catch Pan Installation" on 4-6).
Advertisement
Table of Contents
