HP Color LaserJet Enterprise CM4540 Service Manual - Page 657
Table 3-24, Causes and solutions for residual media jams continued
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Table 3-24 Causes and solutions for residual media jams (continued) Cause Solution Poor contact exists in the sensor that detects residual paper jams. Run the manual sensor test to verify which sensor detects the paper. See Tray/ Bin manual sensor test on page 393 for information. Reconnect the following corresponding sensor connectors: ● Tray 3: Reconnect connectors (J408) and (J13) ● Tray 4: Reconnect connectors (J406) and (J22) ● Tray 5: Reconnect connectors (J403) and (J32) The sensor that detects residual paper jams is Run the sensor test in the sensor monitor mode to verify which sensor detects defective. the paper. Replace media feed sensor 1, 2 or 3. Table 3-25 Causes and solutions for IPTU delivery delay jams Cause Solution Poor contact exists in the IPTU media feed sensor conector. Reconnect the connector (J553) on the IPTU controller PCA. The IPTU media feed sensor is defective. Run a manual sensor test to verify that the IPTU media feed sensor is functioning properly. If it is not, replace the IPTU media feed sensor. Poor contact exists in the IPTU feed motor drive connector. Reconnect the connector (J551) on the IPTU controller PCA and the connector (J5) for the IPTU feed motor. The IPTU feed motor is defective. Run a manual sensor test for the IPTU feed motor sensor to verify that the IPTU feed motor is functioning properly. If it is not, replace the IPTU drive assembly. Poor contact exists in the IPTU media full sensor connector. Reconnect the connector (J553) on the IPTU controller PCA. The IPTU media full sensor is defective. Run a manual sensor test to verify that the IPTU media full sensor is functioning properly. If it is not, replace the IPTU media full sensor. Table 3-26 Causes and solutions for IPTU stationary jams Cause Solution The lever for the IPTU media feed sensor is set Check the sensor lever to make sure it is set correctly. If it is damaged, replace incorrectly or damaged. the IPTU media feed sensor. The spring of the IPTU media feed sensor lever Put the spring in the correct position. is unhooked Poor contact exists in the IPTU media feed sensor connector. Reconnect the connector (J553) on the IPTU controller PCA. The IPTU media feed sensor is defective. Run a manual sensor test to verify that the IPTU media feed sensor is functioning properly. If it is not, replace the IPTU media feed sensor. The lever for the IPTU media feed sensor is set Check the sensor lever to make sure it is set correctly. If it is damaged, replace incorrectly or damaged. the IPTU media feed sensor. The spring of the IPTU media feed sensor lever Place the spring in the correct position. is unhooked. ENWW Clear jams 605
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