What can I do if the Bail Mechanism Fails?
1Obstructions: Check that there are no obstructions in the way of the Bail Assembly.
2Wearing of parts: The cam gear and engaging gear may not make correct contact with the left drive2roller gear even though the carriage is actuating the engaging lever. This can happen due to excessive wearing of parts. Another problem may be that the bail cable has broken.
3Carriage motor control: The carriage may not properly locate the engagement lever, preventing the gears from engaging. Any problems with the carriage2motor control system (for example, the encoder strip) or associated mechanics could cause this problem. Also, if the carriage cannot find the true left stop during initialization (caused by interference), the engaging lever cannot be located.
4Bail cam: The bail may fall from the up position. This can happen if the cam is over or under2rotated. The notch on the cam, used to engage the left bail bracket, is not properly located for the •bail up" condition, and the bail falls abruptly. Perform a bail cycle test.
5Adjust carriage: If the carriage moves over the engaging lever without raising it, you may need to adjust the carriage angle on the slider rod. (Details ' page 525.) However, be careful not to jeopardize the print quality, which is very sensitive to the carriage angle.
EEROM Errors
What is an EEROM error?
An EEROM error means that some of the internal tests that the firmware performs have detected that, when re2reading information from the EEROM, it doesn't correspond to the information that had previously been written there, or that the checksum of all the information is incorrect. This failure has five possible causes:
DFaulty electronics module.
DContact problems with the trailing2cable connections.
DFaulty trailing cable.
DFaulty carriage.
DThe Printer was turned off while a test was writing to the EEROM, thus leaving corrupt information (or a communication cable was disconnected while sending information to the EEROM using software diagnostic tools).
It is generally not easy to discover the cause, due to the intermittent character of the failure modes.
HP DesignJet 430, 450C and 455CA Printers | Troubleshooting |