HP Color LaserJet Enterprise CP4020 Service Manual - Page 430
Table 3-25, Causes and solutions for residual media jams
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Table 3-24 Causes and solutions for duplex repick jams (continued) Cause Solution Poor contact of the duplex re-pickup sensor Reconnect the intermediate connector (J74) and connector (J145) on the DC connector controller PCA. The duplex re-pickup sensor (SR22) is defective. Run the manual sensor test to verify that the duplex re-pickup sensor (SR22) is functioning properly. See Manual sensor test (special-mode test) on page 246 for information. If it is not, replace the right-door assembly. See Right-door assembly on page 113. Poor contact of the duplex reverse solenoid connector Reconnect the connector (J69) of the duplex reverse solenoid, connectors J202 and J201 on the high-voltage power supply (upper), and connector J113 on the DC controller PCA. The duplex reverse solenoid is defective. Replace the duplex-drive assembly. See Duplex-drive assembly on page 151. The duplex flapper is damaged or malfunctioning. Replace the delivery assembly. See Delivery assembly on page 145. Poor contact of the duplex reverse solenoid connector Reconnect the connector (J69) of the duplex reverse solenoid, connectors (J202) and (J201) on the high-voltage power supply (upper), and connector (J113) on the DC controller PCA. The duplex reverse solenoid is defective. Replace the duplex-drive assembly. See Duplex-drive assembly on page 151. The duplex flapper is damaged or malfunctioning. Replace the delivery assembly. See Delivery assembly on page 145. The duplex repick roller is worn or damaged. Replace the registration assembly. See Registration assembly on page 128. Poor contact of the duplex repick clutch connector. Reconnect the intermediate connector (J74) of the duplex repick clutch and connector (J145) on the DC controller PCA. The duplex repick clutch is defective. Run the solenoid drive test in actuator drive mode to verify that the duplex repick clutch is functioning properly. If it is not, replace the registration assembly. See Registration assembly on page 128. Table 3-25 Causes and solutions for residual media jams Cause Solution Poor contact of the loop-sensor connector and Reconnect the connectors of the loop 1 sensor (1 and 2): loop sensor 1 and 2. ● Loop 1 (J11, J352, J350, J50) and the DC controller (J139) ● Loop 2 (J10, J352, J350, J50) and the DC controller (J139) The loop sensor is defective. Run the manual sensor test. See Manual sensor test (special-mode test) on page 246 for information. If the sensor is defective, replace fuser. See Fuser on page 85. The spring of the fuser-delivery-sensor lever is Check the spring of the fuser and right door and place it in the correct position. unhooked. The fuser-delivery sensor lever is damaged. Replace the sensor (SR5). Poor contact of the fuser-delivery sensor connector. Reconnect the connectors of the fuser-delivery sensor (J46), intermediate (J95) and the DC controller PCA (J123). The fuser-delivery sensor is defective. Run the manual sensor test to make sure the fuser-delivery sensor is functioning properly. See Manual sensor test (special-mode test) on page 246 for information. If the sensor is defective, replace the fuser. See Fuser on page 85. 398 Chapter 3 Solve problems ENWW