![background image](http://html.mh-extra.com/html/tektronix/phaser-840/phaser-840_quick-reference-manual_1078590060.webp)
50
Phaser 840 Color Printer
Fuzzy text
Text appears indistinct and difficult to
read.
1.
Head-to-drum gap is too great.
Verify the gap with the adjustment
as explained in the topic
“Printhead-to-drum spacing
adjustment” on page 66.
2.
Verify the drum temperature using
PC-based diagnostics. Ensure the
drum temperature sensor is
properly positioned.
3.
If the problem persists, replace the
printhead.
Poor primary color fills
Primary fills appear banded and
inconsistent.
1.
Head-to-drum gap is too small.
Verify the gap with the adjustment
explained in the topic “Printhead-
to-drum spacing adjustment” on
page 66.
2.
Verify the drum temperature using
PC-based diagnostics. Ensure the
drum temperature sensor is
properly positioned.
3.
Verify the paper preheater
temperature using PC-based
diagnostics.
4.
If the problem persists, replace the
printhead.
0388-46
0388-47
Summary of Contents for Phaser 840
Page 46: ...36 Phaser 840 Color Printer ...
Page 95: ...Service Guide 85 Clearing PostScript NVRAM menu item ...
Page 96: ...86 Phaser 840 Color Printer ...
Page 121: ...Service Guide 111 Figure 1 Cabinet FRUs 7 5 6 8 1 2 4 0388 21 3 ...
Page 125: ...Service Guide 115 Figure 3 Paper path FRUs 0388 16 2 1 5 11 10 9 12 6 4 3 7 13 8 ...
Page 127: ...Service Guide 117 Figure 4 Motors and fans FRUs 0388 14 7 4 3 5 6 2 1 ...
Page 129: ...Service Guide 119 Figure 5 Circuit boards FRUs 4 3 5 2 1 9 7 6 8 10 11 13 0388 13 12 ...
Page 131: ...Service Guide 121 Figure 6 Solenoids and clutches FRUs 4 5 3 2 1 0388 23 ...
Page 137: ...Service Guide 127 Figure 9 High capacity PaperTray 0388 65a 1 2 ...
Page 142: ...132 Phaser 840 Color Printer ...
Page 154: ...144 Phaser 840 Color Printer ...