Replacement of maintenance units

The printer prompts you from the control panel when it is time to replace a maintenance unit. The following table lists the approximate time intervals for replacing maintenance units. For proper printer operation, use only HP maintenance units. (See Chapter 8 in the service manual.) 14.6 REPLACE (CLJ)*** COATING PAD KIT 14.6 Replace Coating Kit (CLJ5 5M)**** This time period assumes you are printing 2,000 pages per month. If your print quantities differ, adjust the time period accordingly....

134 Clear front tray input jam

The locations of all sensors are identified on page 139. The printer detects a paper jam in the front tray area. The paper failed to arrive at PS7 within the allotted time after SL1 (the paper feed solenoid) was engaged. - Inspect the input and registration area for media. Transparencies can be especially difficult to see. - Test the operation of the sensors by entering Service Mode (see Accessing Service Mode on page 87) and running test 20. See Troubleshooting paper feed problems on page 68.

544 Cam home position sensor

The cam sensor (PS2) did not detect home position. This message can also occur with general printer disassembly involving the control PCA or the developer bias supply. - Since PS2 is located on the back of the developer bias supply, make sure it is reconnected if the developer bias supply was removed. (See page 139 for the location of PS2.) - Make sure that the connector (CN802) on the control PCA is fully seated. Other symptoms include the following - complete or partially blank pages -...

Correcting toner concentration levels

Effective resolution of a low toner concentration problem requires correction of the root cause. Here are some likely causes Poor distribution of the toner mix in the developer cartridge at the time of its initial use in the printer. - It is possible that shipment or storage of the developer resulted in some toner carrier segregation. This can result in erroneous calibration of the toner-concentration sensor when the new developer is initialized in the printer. Toner carrier segregation can...

Troubleshooting paper feed problems

Paper Jam Sensor

Paper problems can be difficult to detect. The following series of steps will help isolate paper-induced problems versus printer problems Evaluate paper-use practices. Evaluate environmental conditions. Here are some simple tips Turn the paper over and print on the other side. Doing so often corrects excess paper curl. Rotate the paper 180 end-to-end to feed a different leading edge. This can help correct multi-sheet feeding problems. When troubleshooting paper jams, remember that jams are...