HP Designjet 1000 Series Printers - TWI: System Error 0A0000, 0A0010 - caused when the air pressure falls below the minimum requirement

Part description	Models - C6074A, C6075A	Models - C6074B, C6075B
Air Pressure System (Required)	C6074-60387	C6074-60387
Ink Tube System (Required)	C6074-60415	C6074-60415
Electronics Module (Required)	C6072-69146	C6074-60283
Electronics Module Fuse (Required)	C6074-60307	C6074-60467
Trailing Cable (Optional) see note below	C6072-60196	C6074-60148
Black Ink Cartridge (Optional)	C4871A	C4871A
Cyan Ink Cartridge (Optional)	C4872A	C4872A
Yellow Ink Cartridge (Optional)	C4873A	C4873A
Magenta Ink Cartridge (Optional)	C4874A	C4874A

NOTE: If the printer is an “A” model, a Trailing cable must be sent with the rest of the parts listed.

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.

Reseat all cartridges, and turn the printer off then on.

If the problem continues, check the ink levels (Ink System Options, Ink Cartridge Info). If any of the Cartridges report five percent or less of ink, replace the affected cartridge(s).

NOTE: If an ink cartridge has been recently replaced, replace that particular ink cartridge again to eliminate a faulty new ink cartridge from causing the error message.

Following replacement, attempt to verify. If the problem persists, continue with the remaining steps.

Open the door at the back of the right cover (as viewed from back of printer) to allow access to ISS Assembly.

Verify that the two white latches that retain the ink cartridge tube connector assembly are secured.

Verify that the air tube from the APS assembly is securely connected to the ink cartridge tube connector assembly interlock.

Verify that the clear air tubes running to each cartridge are securely attached at both ends.

Go to front of printer and remove all of the ink cartridges.

Observe if any of the two needle valves in each of the four ink cartridge locations are bent. Straighten the needle valve(s) or replace entire ink tubes assembly if needed, (refer to pg. 8-53 of the Service Manual).

NOTE: If removal and installation instructions are needed for reference during any repairs performed, refer to the 1000 Series Service Manual available on the Computer Care Web site for review or download.

Reseat the ink cartridges.

Perform the Ink Pressure System Test (instructions listed below).

If the test passes, proceed to Step 15.

If the test fails, replace components as suggested on display, starting with first on list.

NOTE: If printer is an “A” model, replace the Trailing cable during an Electronics Module replacement. Refer to pg. 8-39 of the Service Manual for removal and replacement instructions.

Perform the Ink Pressure System Test after each component replacement to verify if the problem is corrected.

Turn the printer off, using the front panel power switch.

Wait five (5) seconds and turn the printer on, again using the front panel power switch.

Verify printer functionality.

Ink Pressure System Test

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.

Turn the printer off using the power switch on the front of the printer.
Hold down the Color key and turn the printer on.
Once inside the Service Tests menu, use the arrow keys to scroll to 4 Ink Pressure System, and press Enter.
The message Running APS Test will appear while the printer is performing the test.
If the test passes, attempt to verify printer functionality by printing several internal prints and checking the printer for ink leaks.
If the test fails, replace parts as instructed in Step 13 of the previous section.

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

WARNING: 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

WARNING: 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 cover

Follow the procedures listed above in reverse order.

	Parts required (part numbers are subject to change)
	Troubleshooting steps
	Ink Pressure System Test
	Multi-Roll feeder disassembly
	Removing the Multi-Roll feeder left side cover
	Removing the Multi-Roll feeder right side cover
	Installation of cover