Service Manual - Tektronix Phaser 360 Service Manual

Service Test Print 2 - Weak jet. This print shows
which jets are not outputting enough, if any, ink
compared to its neighboring jets. Note that the
yellow jets bands have a small amount of cyan ink
added to them, which tints them green, to make
them more visible.
Look for: No interlacing is used in this print; expect
light/dark variation between jets. Look for much
lighter colored vertical bands in the horizontal bars.
Weak jets in the yellow band are distinguished by a
cyan tint.
Causes : A jet may be partially clogged; perform
printhead clean/purge cycles on the printhead to
remove contaminants from the poor performing jet.
Turn the printer off for 4 to 6 hours (or overnight, if
practical). Then perform clean/purge cycle again.
As a last resort, replace the printhead.
Service Test Print 3 - Big bands. The large,
secondary colored areas in this print reveal banding
and weak jets.
Look for: Vertical "bars" or bands of much lighter
color or a different hue running in-line in one or more
of the solid fills.
Causes: Banding is caused by color-to-color
misregistration inherent in the fabrication of the jet.
Ensure the printhead-to-spacing is correct. Then
use the PC diagnostics to ensure that the printhead
and drum thermals are correct. A weak jet can also
cause banding; refer to Test Print 2. Make sure that
the drum temperature sensor is correctly mounted
and in proper, even contact with the drum. If
necessary, remove the sensor and check it for an
accumulation of debris at its contact point. As a last
resort, replace the printhead.
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Banding
Test Patterns
Weak jet
9923-114
9923-115

Service Manual

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