Printronix L1024, Maintenance Manual

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13–9 Chapter 13 – Troubleshooting Guide
a. Loosen the transfer corona assembly and reseat it to make sure it contacts the
H.V.P.S. spring. The assembly should lock under the tab on the left side of the transfer
charger frame. Slide the assembly to the right as far as possible.
b. Make sure the transfer corona electrode and the H.V.P.S. spring are not corroded.
c. Make sure the H.V.P.S. contact spring is making good physical contact with the
electrode. The spring can be lengthened by pulling (stretching) it. Make sure to pull the
spring upward, not at an angle.
d. Make sure that there is no toner or paper dust on the corona wire or in the corona wire
channel.
130. White horizontal line with a 5 inch interval (indistinct width with a tapered shape and fuzzy
edges).
The line is narrower in the center of the page. This is best exhibited by printing a black
page.
131. There is toner buildup on the OPC drum where the guide roller of the developer contacts
the OPC drum.
a. Check for toner buildup on the side of the OPC drum where the stripe is occurring.
Clean the toner from the drum. Avoid scratching the drum.
b. Replace the OPC drum unit.
132. The OPC drum has an area on it that has poor electrical characteristics.
a. Replace the OPC drum unit.
140. White horizontal line with a 2.5 inch interval (indistinct width with a tapered shape and
fuzzy edges).
The line is narrower in the center of the page. This is best exhibited by printing a black
page.
141. There is toner buildup on the guide roller of the developer unit. This will be on the same
side of the developer where the line is occurring on the page.
a. Clean the toner from the guide roller.
142. The guide roller has been worn and is no longer round.
a. Replace the developer unit.
150. White or black horizontal lines with intervals other than those mentioned above.
These lines have an indistinct width and fuzzy edges. These are best exhibited by
printing a black page.
These errors usually will be caused by a defect in one of the gears in the developer gear
assembly. A problem with a gear in the main gear assembly can cause an image error, but it
should be accompanied by “Paper Jam” errors.