HP LaserJet 4250 Service Manual - Page 420
Paper-transport errors, Malfunction errors, Table 7-43
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Paper-transport errors Table 7-43 Paper-transport-error troubleshooting Possible cause Recommended action(s) The rollers are worn, dirty, or defective. Inspect all of the stacker or stapler/stacker rollers. Clean any dirty rollers. If necessary, replace the stacker or stapler/ stacker. The feed guide is damaged, causing the leading edge of the Inspect the feed guide. If, necessary, replace the stacker or media to bend stapler/stacker. An obstruction in the paper path causes skewed print. ■ The paper path is contaminated. Clean the paper path. See Stacker and stapler/stacker paper path. ■ The rollers are worn, dirty or defective. Inspect all of the stacker or stapler/stacker rollers. Clean any dirty rollers. If necessary, replace the stacker or stapler/stacker. Malfunction errors Table 7-44 Malfunction-error troubleshooting Possible cause No power The stacker or stapler/stacker connector is not fully seated or is damaged. Recommended action(s) ■ Inspect the stacker or stapler/stacker connectors on the unit and on the printer. Verify that these connectors are not damaged, and that the stacker or stapler/stacker is installed correctly and fully seated. If the stacker or stapler/stacker was installed when the printer power was on, turn the power off and then on again. ■ Turn the printer power off. Remove and reinstall the stacker or stapler/stacker. Turn the printer power on again. The stacker or stapler/stacker PCA is defective. No stapling (stapler/stacker only) The staple cartridge contains no staples. The stapler unit is defective. The print job contains more than one paper size. The stapler/stacker PCA is defective. Replace the stacker or stapler/stacker. Replace the stapler-unit staple cartridge. See Stapler/ stacker stapler assembly. Replace the stapler unit. See Stapler/stacker stapler assembly. When using the stapler/stacker, limit the print job to a single page size. Replace the stapler/stacker. 406 7 Troubleshooting