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HP Designjet 500 and 800 Series Printers - TWI: System Error 08:11

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

KRS document number: BPP90161

Last Updated: 19-Nov-2001

Minimum skill level: 2

System error 08:11 is generated when the printer has detected a fault in the communication with the front panel. Causes of this error can include the Front Panel, Interconnect PCA, Interconnect PCA Cable 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 Model Numbers - C7769B, C7770B, C7769C, C7770C	Designjet 800 Model Numbers -C7779B, C7780B, C7779C, C7780C
Front Panel Assembly (Required)	C7769-60161	C7769-60161
Interconnect PCA (Required)	C7769-60173	C7769-60173
Interconnect PCA Cable (Required)	C7769-60180 24 inch models C7770-60016 42 inch models	C7769-60180 24 inch models C7770-60016 42 inch models
Electronics Module (Required)	C7779-69144 / C7779-60263	C7779-69144 / C7779-60263

NOTE: If Removal and Installation instructions are needed for reference during any repairs performed, refer to the 500/800 Series Service Manual 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 and attempt to recreate the error message.
2. If no error appears, attempt to verify functionality. If the error re-appears, continue with the remaining steps.
3. Turn the printer off and disconnect the data cables (parallel and/or network), leaving the power cable connected.
4. Turn the printer on, if the error re-appears continue with the remaining steps. If no error, verify functionality as instructed below (troubleshoot data cables, file(s), computer port type, etc).
5. Check all the connections on the Interconnect PCA and Electronics module (refer to pg. 8-7, 8-8 of the 500/800 Series Service Manual). If problems noticed and corrected, attempt to verify functionality before continuing with the remaining steps.

WARNING: To prevent possible injury, always remove the power cable from the back of the printer before connecting/disconnecting any internal printer cables or performing any repairs.

6. If no problems are noticed or the error persists, replace the Front panel assembly (refer to pg. 8-9 of the 500/800 Series Service Manual).
7. Following replacement, attempt to verify functionality. If problems persist, continue with the remaining steps.
8. Replace the Interconnect PCA and Interconnect PCA cable (refer to pg. 8-50 of the 500/800 Series Service Manual).
9. Following replacement, attempt to verify functionality. If problems persist, continue with the remaining steps.
10. Replace the Electronics module (refer to pg. 8-24 of the 500/800 Series Service Manual).
11. Verify printer functionality.

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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