Printronix L1024, Maintenance Manual

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13–13 Chapter 13 – Troubleshooting Guide
a. Replace the LSU.
270. The output page is creased.
271. There is a crease running down the center of the output page.
a. Adjust the fuser rear cover position. The cover is too close to the pressure roller.
b. Replace the fuser if the rear cover is damaged or cannot be properly adjusted.
272. There are creases throughout the output page.
a. Adjust the fuser rear cover position. The cover is too close to the pressure roller.
b. Replace the fuser if the rear cover is damaged or cannot be properly adjusted.
300. Cyclic Image Errors.
310. Black area at a 1 inch interval.
311. The doctor blade gap is too large, causing excess toner to build up, which causes
“blocking”. This will be evident by a severe grinding noise in the printer.
a. Replace the developer unit.
312. The contact between the developer sleeve and the electrode is faulty.
a. Apply conductive grease to the developer sleeve contact.
b. Replace the developer unit.
313. The contact between the developer unit and the H.V.P.S. is faulty.
a. Make sure there is no corrosion on the spring of the H.V.P.S. contact or on the
developer unit contact.
b. Make sure the spring is making good physical contact with the contact. The spring can
be lengthened by pulling it in order to make better contact.
314. The bias voltage from the H.V.P.S. is incorrect.
a. Check the developer roller bias according to the procedure in Chapter 8,
Power
Supplies, and adjust if needed.
b. Replace the H.V.P.S. if the bias cannot be adjusted correctly.
320. White area at a 2.5 inch interval.
321. There is toner buildup on the guide roller of the developer unit.
a. Clean the toner from the guide roller.
b. Replace the developer unit.
322. The guide roller has been worn and is no longer round.
a. Replace the developer unit.
330. Black or white area at a 3 inch interval.