HP Color LaserJet CM4730 Service Manual - Page 599

Table 6-10 Causes of jams in the ADF (continued) Cause The ADF separation pad might be installed incorrectly. Specific components inside the ADF might not be functioning correctly. Solution Make sure the ADF separation pad is seated correctly. If it is excessively dirty or worn, replace it. From the Troubleshooting menu, run the Scanner Tests to verify that each of these components is functioning correctly: ● ADF input motor (forward and reverse) ● ADF read motor (forward and reverse) ● ADF duplex solenoid ● ADF input-tray-empty sensor ● ADF registration sensor If the MFP passes all of the diagnostic tests but ADF jams still persist, replace the ADF. See ADF assembly on page 437. Jams in the IPTU The following table describes the cause of and solutions for jams in the IPTU. Table 6-11 Causes for jams in the IPTU Cause Solution The IPTU might be improperly installed and seated. Reinstall or reseat the IPTU if necessary. The top of page sensor (SR8301) or sensor lever is defective. 1. Make sure that the sensor lever moves smoothly. 2. Run the component test. 3. Replace the IPTU sensor if it is defective. The delivery sensor (SR8302) or sensor lever is defective. 1. Make sure that the sensor lever moves smoothly. 2. Run the component test. 3. Replace the IPTU sensor if it is defective. One of the feed motors (M8301 and M8302) is defective. 1. Run the component test. 2. If the motor fails, replace it. Jams in the stapler/stacker The following table describes the cause of and solutions for jams in the stapler/stacker. Table 6-12 Causes for jams in the stapler/stacker Cause Solution The stapler/stacker might be improperly installed and seated. Reinstall or reseat the stapler/stacker if necessary. ENWW Paper path troubleshooting 579