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HP Designjet 500 and 800 Series Printers - TWI: System Error 43:10

	Parts required (part numbers are subject to change)
	Troubleshooting steps
	Verifying printer functionality

KRS document number: BPP90135

Last updated: 24-Aug-2001

Minimum skill level: 2

System error 43:10 is generated when the vacuum fan is plugged into the electronic module but has failed. Causes of this error can include the vacuum fan or the electronics module. Follow the steps listed below to accurately troubleshoot the issue, and replace the appropriate parts.

Parts required (part numbers are subject to change)

Part description	Designjet 500 Models - C7769B, C7770B, C7769C, C7770C	Designjet 800 Models - C7779B, C7780B, C7779C, C7780C
Vacuum Fan (Required)	C7769-60150	C7769-60150
Electronics Module (Required)	C7779-69144	C7779-69144

NOTE: If removal and installation instructions are needed for reference during any repairs performed, refer to the 500/800 Series Service Manual available on the Computer Care Web site for review or download.

Troubleshooting steps

If any of the troubleshooting steps listed below solve the problem, attempt to verify printer functionality (instructions below). If functionality is verified, no additional parts should be replaced.

NOTE: Always verify the printer's current firmware release and upgrade as needed.

1. Turn the printer off, then on to verify error. If no error appears attempt to verify functionality.
2. If the error appears or problems persist, continue with the remaining steps.
3. Turn the printer off.
4. Turn the printer on and listen for the vacuum fan to start.

NOTE: If media is loaded, the vacuum fan should start in approximately 50 seconds. If no media is loaded the printer will prompt to load media. Load a sheet of media to engage the fan.

5. Verify that vacuum fan movement is not obstructed. Remove any such obstructions and attempt to verify functionality.
6. If the vacuum fan is not audible or the problem persists, replace the vacuum fan (refer to pg. 8-64 of the 500/800 Series Service Manual).
7. Following replacement attempt to verify functionality.
8. If the error returns following replacement of the vacuum fan, replace the electronics module (refer to pg. 8-24 of the 500/800 Series Service Manual).
9. Following replacement, verify printer functionality as instructed below.

Verifying printer functionality

1. Turn the printer on.
2. Allow initialization to complete.
3. Load media into the printer.
4. From the main front-panel menu, select the Ink menu and press ENTER.
5. Select TROUBLESHOOTING and press ENTER.
6. Follow the instructions on the front panel.
7. Following a successful troubleshooting plot, printer functionality has been verified.

Copyright Hewlett-Packard Co. 2001
This information is subject to change without notice and
is provided "as is" with no warranty.
Hewlett-Packard shall not be liable for any direct,
indirect, special, incidental or consequential damages
in connection with the use of this material.

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