Epson Stylus Pro 7500, Service Manual

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EPSON Stylus Pro 7500 Revision A
Troubleshooting Troubleshooting Based on Your Printout 94
SMUDGED OR MARRED PRINTOUT (REVERSE SIDE)
If smudging or marring of the paper back surface with ink occurs, the following items
should be checked.
1. Check if there isn’t ink adhering to the paper feed path. If there is ink adhering, it
should be wiped off.
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Sub-platen A/B Surface
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Grid roller surface
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Paper guide L surface
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Paper guide L2 surface
2. One likely cause of ink adhering to the above parts is the following cause.
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Paper feeding at a slant during printing (at the point when 1 page is finished)
WHITE OR BLACK BANDING
If white or black banding (lines across the page) appear on your printout, try the following.
1. Print the “Nozzle Check Pattern.”
If it is normal, carry out the “Head Slant Adjustment.”
If skipping of dots occurs, carry out “Cleaning.”
2. If skipping of dots is not the cause, carry out adjustments of the print heads.
Head slant adjustment (B head / C head)
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If each of the nozzle rows on the B head or C head is not positioned so that it is
perpendicular to carriage travel direction, overlapping of the raster lines which are
printed and compose the print will occur, and this will cause dense portions and
white streaks between raster lines.
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Head height adjustment (B and C heads)
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Round trip print position adjustment.
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Gap adjustment.
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In the self-diagnostic mode, check if the value written for the head ID.
C A U T I O N
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If the Paper Skew Detection setting is off in “Printer Settings” ->
“Panel Setting Menu” -> “Paper Width Detection,” if the user’s
paper size setting is not correct, the surface of the platen will be
printed.