HP Designjet 1000 Series Printers - TWI: System Error 0B000D

Part description	Models - C6074A, C6075A	Models - C6074B, C6075B
Electronics Module (Required)	C6072-69146	C6074-60283
Main Logic PCA (Required)	N/A	C6074-60283
Electronics Module/Main Logic PCA Fuse (Required)	C6074-60467	C6074-60467
Trailing Cable (Required)	C6072-60196	C6072-60418
Carriage Assembly (Required)	C6072-60147	C6074-60388
Maintenance Kit (Optional)	C6072-60143	C607 2-60395

NOTE: The fuse being sent should be used if a poor trailing cable connection or a shorted trailing cable blows the fuse on the electronics module. Make sure to properly connect the trailing cable or replace a shorted trailing cable before installing the new fuse.

Troubleshooting steps

If any of the troubleshooting steps listed below solve the problem, attempt to verify printer functionality by printing several internal prints. If functionality is verified, no additional parts should be replaced.

NOTE: If Removal and Installation instructions are needed for reference during any repairs performed, refer to the HP Designjet 1000 Series Service Manual available on the

Computer Care Web site for review or download.

Turn the printer off and remove the power cable.
Open the rear access panel and reseat the Firmware and Memory.
Close the rear access panel and plug the power cable back into the printer.
Turn the printer on.
If no error appears, attempt to verify functionality.
If the error re-appears or problems persist, turn the printer off and remove the power cable from the back of the printer.
Replace the electronics module (refer to pages 8-25 of the Service Manual for "A" models) (Refer to Supplement for Main PCA Replacement on "B" Models).
Following replacement of the Electronics module, turn the printer on and perform a calibrations backup and a pen alignment calibration as listed below.
Turn the printer off, then on and attempt to verify functionality.
If the issue persists, replace the carriage and trailing cable (refer to pages 8-44, 8-39 of the Service Manual).
Lower the printer’s top cover and close the printhead cleaner door (door on right side).
Turn the printer on and allow initialization to complete.
Perform service calibrations 2, 3, 4, 6, 8, and the carriage height calibration (service calibration instructions are listed below).
Following successful calibrations, turn the printer off, then on and verify functionality.

Performing service calibrations

NOTE: Printer menu mode must be set to Full to access the Service Tests submenu. To verify, at the Ready prompt, scroll to the PRINTER SETUP icon, and press Enter. Use the keys to scroll to the Utilities menu and press Enter. Using the Arrow keys, scroll to Menu Mode =. Select Full (if needed) and press the Back key to return to the main menu.

Turn the printer on and allow initialization to complete.
At the Ready prompt, scroll to the Printer Setup menu (icon of printer in the lower-right side of the front panel display) and press Enter.
Use the Arrow keys to scroll to Utilities, and press Enter.
Once in Utilities menu, press the Up Arrow key and the Enter key simultaneously. You will now be in the Service Tools menu.
Scroll to Service Calibrations and press Enter.
Scroll to the needed service calibration and press Enter.
Follow instructions displayed on the front-panel to complete the selected calibration.
When calibration is finished, stay in Service mode to perform any additional calibrations (if required).
When all required calibrations are complete, return to the main Status display using the Back key.
Turn the printer off.
Turn the printer on, and attempt to verify functionality.

Calibrations backup

NOTE: Printer menu mode must be set to Full to access the Service Tests submenu. To verify, at the Ready prompt, scroll to the PRINTER SETUP icon, and press Enter. Use the Arrow keys to scroll to the Utilities menu and press Enter. Using the Arrow keys, scroll to Menu Mode =. Select Full (if needed) and press the Back key to return to the main menu.

With the printer turned on, scroll to the Printer Setup menu (icon of printer in the lower-right side of the front panel display) and press Enter.
Using the Arrow keys scroll to Utilities, and press Enter.
Press the Up Arrow and Enter keys simultaneously.
Scroll to Service Calibrations and press Enter.
Scroll to 7 Calibrations Backup and press Enter.
Select Electronics Module Repl and press Enter.
Select Accept to continue the Calibrations Backup.
Press Enter when calibrations backup is complete.
Continue with the Pen Alignment calibration.

Pen alignment

In the Service Tools submenu, scroll to 8. Pen Alignment and press Enter.
Scroll to Accept and press Enter.
If paper is not loaded, the printer will prompt for installation of paper, load as needed.
The printer will begin the pen alignment and display the time remaining to complete the calibration.
When the calibration is complete, press Enter to continue.
Following the calibration, turn the printer off, then on and verify functionality.

Multi-roll feeder disassembly

Only remove the corresponding side cover of the multi-roll that requires maintenance. For example, only remove the right side cover of multi-roll if only the right end cover of the printer requires removal to complete the necessary service. Follow the steps listed below to gain access to the printer to complete the necessary service.

NOTE: Only one CE needs to be dispatched to perform service on an HP Designjet 1000 series printer attached to a multi-roll feeder.

Removing the multi-roll feeder left-side cover

CAUTION: Turn both the printer and the multi-roll feeder off and disconnect them from the power source prior to performing any maintenance.

Open the left door of the multi-roll feeder.
Loosen the two screws that secure the left door to the multi-roll feeder.
Figure 1:Left door screws
Remove the left door.
Remove the two star screws (orange) that secure the front top-cover to the multi-roll feeder.
Figure 2:Front top-cover screws needing removed
Remove the multi-roll feeder top cover.
Remove six T-20 screws that secure the left-side cover to the multi-roll feeder from the front.
Figure 3:Screws securing the front left-side cover
Remove the seven T-20 screws that secure the left-side cover to the multi-roll feeder from the rear.
Figure 4:Screws securing the rear left-side cover
Remove the left-side cover.
Figure 5:Removing the left-side cover

Removing the multi-roll feeder right-side cover

CAUTION: Turn both the printer and the multi-roll feeder off and disconnect them from the power source prior to performing any maintenance.

Remove the right door and front top cover from the multi-roll feeder (follow Steps 1 through 5 of the previous section and remove the right door instead of the left).
Remove six T-20 screws that secure the right side cover to the multi-roll feeder from the front.
Figure 6:Screws securing front right-side panel
Remove nine T-20 screws that secure the right-side cover to the multi-roll feeder from the rear.
Figure 7:Screws securing rear right-side cover
Open the rear top cover.
Figure 8:Rear top cover
Release the cable that is attached to the top of the right-side cover.
Figure 9:Cable connection
Remove the right-side cover.
Figure 10:Removing the right-side cover

Installation of covers

Follow the procedures listed above in reverse order.

	Parts required (part numbers are subject to change)
	Troubleshooting steps
	Performing service calibrations
	Calibrations backup
	Pen alignment
	Multi-roll feeder disassembly
	Removing the multi-roll feeder left-side cover
	Removing the multi-roll feeder right-side cover
	Installation of covers