Question about HP DesignJet 1050c InkJet Printer
One of the Printheads has an Internal Electrical Problem.
Corrective Action: Try the following:
n Remove all the Printheads and clean the flex contacts on the
Printheads and in the Carriage Assembly (Refer to Chapter 2).
n Perform the Electronic Systems Test þ Page 4-5.
n Make sure that the Trailing Cable is connected correctly.
n Replace the Trailing Cable þ Page 8-39.
n Replace the Carriage Assembly þ Page 8-44.
n If the error code continues, replace the Electronics Module þ
WARNING Only replace one component at a time and check if the error has
gone before replacing another component. Using this procedure
you will be able to determine exactly which component failed.
Posted on Feb 11, 2010
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The Trailing Cable has been incorrectly connected OR the fuse in the Electronics Module has been burned.
Corrective Action: Turn the Printer OFF and disconnect the trailing cable. Check that the ends of the Trailing Cable are flat and are not damaged or bent. Reconnect the Trailing Cable correctly, making sure it is pushed in firmly. Do the resistance test. Power ON the Printer and check if the Error Code disappears. If the Error Code continues, replace the Main Logic Board
Note: The logic board is a direct replacement for the Designjet 1050C Plus and 1055CM Plus. If the plotter you are repairing is the Designjet 1050C (not Plus) you will also need to replace the memory and the firmware.
If you are repairing a Designjet 1055CM (not Plus) you will have to replace the Hard Disk Drive also. The firmware is identical for the 1050C Plus and 1055CM Plus
Note: The aerosol fan is not used in the Designjet 1050C Plus or 1055CM Plus. Coil the cable out of the way or completely remove the fan.
WARNING TAKE CARE WHEN CONNECTING THE TRAILING CABLE TO THE ELECTRONICS MODULE OR CARRIAGE. INCORRECT INSTALLATION WILL BURN THE FUSE IN THE ELECTRONICS MODULE, CAUSING THE COMPLETE FAILURE AND REPLACEMENT OF THE LOGIC BOARD. 100 OHMS OR HIGHER MUST BE SEEN AT THE TEST POINTS. CONSULT THE SERVICE MANUAL FOR CORRECT PROCEDURE.
Continuable and Non-Continuable Error Codes
Some of the Error Codes are continuable, which means you can press Enter on the front-panel and continue working with the Printer. Non-Continuable Error Codes do not allow you to continue working with the Printer, in this case power the Printer OFF and ON again and see if the System Error disappears. If the Error Code reappears, then the Printer requires service in order to resolve the problem.
System error codes are hexa-decimal based numbers generally caused by internal system errors. Only try one recommended action at a time and check if the error code has disappeared.
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