Tektronix 1235N - Phaser Color Laser Printer Service Manual page 227

Interpreting the Gray 35% Halftone Test
Pattern
Gray 35% Halftone Test Pattern
The Gray 35% Halftone Test Pattern is a
full-page, fill made up of a 35% gray tint. It is
useful for isolating black imaging and LED
head problems.
Look for uniform fill with no banding or lines.
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Interpreting the Blank Print (with
crosshatch)
Each print consists of a blank page with a
single primary-colored crosshatch printed
near the top of the page. Use these pages
to identify color on non-printed areas of a
print as well as residual offsetting.
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Service Guide